两个镉配位聚合物的合成和晶体结构
作者：
张剑;王梦蝶;王小峰;谭春红
期刊：
南华大学学报(自然科学版) ,2020年34(04):80-84 ISSN：1673-0062
作者机构：
南华大学 化学化工学院,湖南 衡阳421001;[谭春红; 王小峰; 张剑; 王梦蝶] 南华大学
关键词：
镉;配合物;合成;晶体结构
摘要：
选用2,2-联吡啶和二羧酸配体,在溶剂热条件下与硝酸镉反应,制得配位聚合物[Cd（FAC）（2,2-bpy）·H2O]n（1）和[Cd（BDC）（2,2-bpy）·H2O]n（2）。对这两个配位聚合物进行X-射线单晶衍射、元素分析表征,结构分析表明配位聚合物1和2都是一维链状结构。
语种：
中文
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凝胶注模成型氧化锆陶瓷盖板工艺研究
作者：
李奔可;陈茵芝;李小兰;王晨扬;黄国基;...
期刊：
中南大学学报(自然科学版) ,2020年51(11):3128-3135 ISSN：1672-7207
通讯作者：
Xie, R.
作者机构：
南华大学化学化工学院,湖南衡阳,421001;中国运载火箭技术研究院,北京,100076;[陈茵芝; 谢睿; 王小峰; 李小兰; 李奔可; 王晨扬] 南华大学;[黄国基] 中国运载火箭技术研究院
通讯机构：
School of Chemistry and Chemical Engineering, University of South China, Hengyang, China
关键词：
凝胶注模成型;氧化锆;海因环氧树脂;流变性能;Weibull分析
摘要：
对基于低毒性海因环氧树脂体系的氧化锆凝胶注模成型技术进行改进和发展,研究固相体积分数对浆料流变性能、凝胶过程、生坯和烧结坯力学性能的影响规律,并研究高性能氧化锆陶瓷盖板制备方法。研究结果表明:浆料黏度随固相体积分数增加而增大,但即使固相体积分数高达55.0%,浆料黏度也仅为0.606 Pa·s,能够满足浇注成型的要求;当固相体积分数为52.5%时,烧结坯强度的Weibull模量达到最大值13.38,即微观结构均匀性最佳,采用该固相体积分数的浆料成功地制备了表面光滑、厚度仅为0.4 mm氧化锆陶瓷盖板。
语种：
中文
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Microfabrication of High-Aspect Ratio KNN Lead-Free Piezoceramic Pillar Arrays by Aqueous Gelcasting
作者：
Cailing Wu;Benke Li;Xiaofeng Wang;Rui Xie* ;Guoping Wang;...
期刊：
Ceramics ,2020年3(3):287-296 ISSN：2571-6131
通讯作者：
Rui Xie
作者机构：
[Dou Zhang] State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;[Feng Ji] Hangzhou Silan Intergrated Circuit Co. Ltd., Hangzhou 310000, China;Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, China;School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China;Author to whom correspondence should be addressed.
通讯机构：
[Rui Xie] H;Hunan Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, China<&wdkj&>School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
gelcasting;potassium sodium niobate ceramic;soft mold;rheology;piezoelectric arrays
摘要：
The present paper reported a novel approach for the fabrication of a high-aspect ratio (K, Na)NbO3 (KNN) piezoelectric micropillar array via epoxy gelcasting, which involves the in situ consolidation of aqueous KNN suspensions with added hydantoin epoxy resin on a polydimethylsiloxane (PDMS) soft micromold. KNN suspensions with solid loadings of up to 45.0 vol.% have rheological behavior, which was suitable for the gelcasting process. The uniform green KNN bodies derived from the optimized suspension of 42.0 vol.% solid loading and 15.0 wt.% resin had exceptionally high mechanical strength (9.14 MPa), which was responsible for the integrity of the piezoceramic micropattern structure. The square-shaped KNN piezoelectric pillar array with lateral dimensions of up to 5 μm and an aspect ratio of up to five was successfully fabricated.
语种：
英文
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Hydrogen bonding-tuned hydroxo-bridged tetra-copper Cu4(bipy)4-cluster supramolecular network to layered coordination polymer
作者：
Zhang, Jian;Chen, Yang-Yang;Tan, Chunhong* ;Ma, Xiao* ;Wang, Xiao-Feng* ;...
期刊：
CrystEngComm ,2020年22(31):5255-5262 ISSN：1466-8033
通讯作者：
Tan, Chunhong;Wang, Xiao-Feng;Ma, Xiao
作者机构：
[Chen, Yang-Yang; Tan, Chunhong; Wang, Xiao-Feng; Zhang, Jian] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Ma, Xiao] Changzhou Univ, Sch Petrochem Engn, Adv Catalysis & Green Mfg Collaborat Innovat Ctr, Jiangsu Key Lab Adv Catalyt Mat & Technol, Changzhou 213164, Jiangsu, Peoples R China.;[Wang, Xiao-Feng] Univ South China, Hunan Key Lab Design & Applicat Actinide Complexe, Hengyang 421001, Peoples R China.;[Ou, Guangchuan] Hunan Univ Sci & Engn, Dept Biol & Chem, Yongzhou 425199, Peoples R China.
通讯机构：
[Tan, CH; Wang, XF; Wang, Xiao-Feng] U;[Ma, Xiao] C;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;Changzhou Univ, Sch Petrochem Engn, Adv Catalysis & Green Mfg Collaborat Innovat Ctr, Jiangsu Key Lab Adv Catalyt Mat & Technol, Changzhou 213164, Jiangsu, Peoples R China.;Univ South China, Hunan Key Lab Design & Applicat Actinide Complexe, Hengyang 421001, Peoples R China.
摘要：
Three tetranuclear Cu(ii) coordination compounds have been synthesized by the self-assembly of copper(ii) nitrate with N/O donating bi-ligands through ammonia aqueous/ethanol mixture solution reaction. Single crystal structural analyses have shown that the three compounds feature chair-like hydroxo-bridged tetra-copper(ii) cluster: symmetric [Cu4(bipy)4(OH)4(H2O)2]4+ in 1, asymmetric [Cu4(bipy)4(OH)4(H2O)(1,3-DBC)]2+ in 2, and symmetric [Cu4(bipy)4(OH)2(1,2-BDC)2]2+ in 3 (bipy = 2,2′-bipyridineand H2BDC = benzene dicarboxylic acid). Three bitopic benzene dicarboxylic ligands (1,4-DBC2-, 1,3-DBC2-, and 1,2-DBC2-) act as a hydrogen bond acceptor, a mono-dentate terminal ligand, as well as a bi-dentate bridging ligand, respectively. Thus, hydrogen bonding plays a key role in influencing the transformation of the Cu4-cluster⋯ligand hydrogen net to the 2-D layered metal-carboxylate coordination polymer. Meanwhile, the magnetic properties of 1 and 2 have been investigated. This journal is © The Royal Society of Chemistry.
语种：
英文
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A hydrolytically stable europium-organic framework for the selective detection of radioactive Th4+ in aqueous solution
作者：
Song, Liping;Liu, Wei;Wang, Yanlong;Chen, Lanhua;Wang, Xiao-Feng* ;...
期刊：
CrystEngComm ,2019年21(22):3471-3477 ISSN：1466-8033
通讯作者：
Wang, Xiao-Feng;Wang, Shuao
作者机构：
[Song, Liping; Wang, Xiao-Feng] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Song, Liping; Wang, Xiao-Feng] Univ South China, Hunan Prov Engn Res Ctr Radioact Control Technol, Hengyang 421001, Peoples R China.;[Chen, Lanhua; Liu, Wei; Song, Liping; Wang, Yanlong; Wang, Shuao] Soochow Univ, State Key Lab Radiat Med & Protect, Sch Radiol & Interdisciplinary Sci RAD X, Collaborat Innovat Ctr Radiat Med Jiangsu Higher, Suzhou 215123, Peoples R China.;[Chen, Lanhua; Liu, Wei; Song, Liping; Wang, Yanlong; Wang, Shuao] Soochow Univ, Sch Radiat Med & Protect, Suzhou 215123, Peoples R China.
通讯机构：
[Wang, Xiao-Feng] U;[Wang, Shuao] S;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;Univ South China, Hunan Prov Engn Res Ctr Radioact Control Technol, Hengyang 421001, Peoples R China.;Soochow Univ, State Key Lab Radiat Med & Protect, Sch Radiol & Interdisciplinary Sci RAD X, Collaborat Innovat Ctr Radiat Med Jiangsu Higher, Suzhou 215123, Peoples R China.
摘要：
Thorium is not only a promising candidate for developing next generation nuclear fuel but also a potential radioactive contaminant. Efficient detection of thorium contamination is critically important in both nuclear science and environmental protection. We present here a 3D luminescent europium organic framework [Eu2(FDC)3(DMA)2]·4H2O (compound 1), which exhibits excellent hydrolytic stability and features highly selective detection capacity (KSV = 6.68 × 104) towards radioactive Th4+ ions among the selected monovalent, divalent and tervalent metal ions in aqueous solution. The detection limit of the material towards Th4+ is 3.49 × 10-5 mol L-1 which is close to the WHO standard. The detection capability and the sensing mechanism were demonstrated by Th4+ uptake kinetics, energy-dispersive spectroscopy mapping, absorption spectroscopy, luminescence lifetime, and competitive adsorption measurements. Compound 1 represents a rare case of a MOF based Th4+ probe. © The Royal Society of Chemistry 2019.
语种：
英文
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Two chiral cadmium carboxylate framework isomers generated by spontaneous resolution: synthesis, structures and properties
作者：
Chen, Yang-Yang;Tan, Chunhong;Song, Li-Ping;Zhou, Juan;Zeng, Qiongyao;...
期刊：
Journal of Coordination Chemistry ,2019年72(2):251-261 ISSN：0095-8972
通讯作者：
Xie, Rui;Wang, Xiao-Feng
作者机构：
[Chen, Yang-Yang; Xie, Rui; Zeng, Qiongyao; Song, Li-Ping; Wang, Xiao-Feng; Xie, R; Tan, Chunhong] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Zhou, Juan] Univ South China, Sch Mech Engn, Hengyang, Peoples R China.
通讯机构：
[Xie, R; Wang, XF] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词：
Cadmium;chiral coordination polymer;helix chain;luminescent;circular dichroism
摘要：
Two three-dimensional (3-D) chiral coordination polymers, [Cd(NDC)(DMF)] n (1 L and 1 D : H 2 NDC = 1,4-naphthalenedicarboxylic acid and DMF = N,N′-dimethylformamide), have been synthesized by introducing the rigid achiral dicarboxylic acid ligand under solvo-thermal conditions, without chiral template or additives. Both chiral Cd-CPs were characterized by single crystal X-ray crystallography, and structural analysis indicates that 1 L and 1 D are enantiomers based on the zigzag [Cd(COO) 2 (DMF)] n rod secondary building units, featuring the left- or right-hand 2 1 Cd-O-C-O-Cd helix chains and left- or right-hand 4 1 screw [Cd(NDC)] n columns, respectively. The FT-IR, TGA, powder X-ray diffraction and solid-state luminescence of 1 have been investigated. It is intriguing that the evidence from the circular dichroism spectroscopies confirms enantiomeric excess in the whole spontaneous resolution crystallization. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.
语种：
英文
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Cooperative Capture of Uranyl Ions by a Carbonyl-Bearing Hierarchical-Porous Cu–Organic Framework
作者：
Wang, Xiao-Feng* ;Chen, Yangyang;Song, Li-Ping;Fang, Zhen;Zhang, Jian;...
期刊：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION ,2019年58(52):18808-18812 ISSN：1433-7851
通讯作者：
Wang, Xiao-Feng;Lin, Ying-Wu;Rocha, Joao;Zhang, Yue-Biao
作者机构：
[Wang, XF; Lin, Ying-Wu; Zhang, Jian; Chen, Yangyang; Song, Li-Ping; Sun, Yunkai; Wang, Xiao-Feng] Univ South China, Sch Chem & Chem Engn, 28 Changsheng Xi Rd, Hengyang 421001, Hunan, Peoples R China.;[Wang, XF; Rocha, J; Rocha, Joao; Shi, Fanian; Wang, Xiao-Feng] Univ Aveiro, Dept Chem, CICECO, Aveiro Inst Mat, Santiago Campus, P-3810193 Aveiro, Portugal.;[Fang, Zhen] Anhui Normal Univ, Coll Chem & Mat Sci, 1 East Beijing Rd, Wuhu 241000, Anhui, Peoples R China.;[Zhang, Yue-Biao] ShanghaiTech Univ, Sch Phys Sci & Technol, 393 Middle Huaxia Rd, Shanghai, Peoples R China.
通讯机构：
[Wang, XF; Lin, YW; Rocha, J] U;[Zhang, Yue-Biao] S;Univ South China, Sch Chem & Chem Engn, 28 Changsheng Xi Rd, Hengyang 421001, Hunan, Peoples R China.;Univ Aveiro, Dept Chem, CICECO, Aveiro Inst Mat, Santiago Campus, P-3810193 Aveiro, Portugal.;ShanghaiTech Univ, Sch Phys Sci & Technol, 393 Middle Huaxia Rd, Shanghai, Peoples R China.
关键词：
adsorption mechanisms;metal-organic frameworks;porous materials;single-crystal structure;uranyl capture
摘要：
To efficiently capture the toxic uranyl ions (UO22+), a new hierarchical micro-macroporous metal–organic framework was prepared under template-free conditions, featuring interconnected multi-nanocages bearing carbonyl groups derived from a semi-rigid ligand. The material exhibits an unusually high UO22+ sorption capacity of 562 mg g−1, which occurs in an intriguing two-steps process, on the macropore-based crystal surface and in the inner nanocages. Notably, the latter is attributed to the cooperative interplay of the shrinkage of the host porous framework induced by uranyl accommodation and the free carbonyl coordination sites, as shown by both single-crystal X-ray diffraction and a red-shift of the infrared [O=UVI=O]2+ antisymmetric vibration band. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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Active sites of copper-complex catalytic materials for electrochemical carbon dioxide reduction
作者：
Weng, Zhe;Wu, Yueshen;Wang, Maoyu;Jiang, Jianbing;Yang, Ke;...
期刊：
Nature Communications ,2018年9(1):415 ISSN：2041-1723
通讯作者：
Liang, Yongye;Wang, Hailiang;Feng, Zhenxing
作者机构：
[Liang, Yongye; Weng, Zhe] South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;[Wang, Hailiang; Jiang, Jianbing; Brudvig, Gary W.; Huo, Shengjuan; Yang, Ke; Batista, Victor S.; Weng, Zhe; Wu, Yueshen] Yale Univ, Dept Chem, 225 Prospect St, New Haven, CT 06511 USA.;[Wang, Hailiang; Jiang, Jianbing; Brudvig, Gary W.; Huo, Shengjuan; Yang, Ke; Batista, Victor S.; Weng, Zhe; Wu, Yueshen] Yale Univ, Energy Sci Inst, West Haven, CT 06516 USA.;[Feng, Zhenxing; Wang, Maoyu] Oregon State Univ, Sch Chem Biol & Environm Engn, Corvallis, OR 97331 USA.;[Huo, Shengjuan] Shanghai Univ, Sci Coll, Dept Chem, Shanghai 200444, Peoples R China.
通讯机构：
[Liang, Yongye] S;[Wang, Hailiang] Y;[Feng, Zhenxing] O;South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China.;Yale Univ, Dept Chem, 225 Prospect St, New Haven, CT 06511 USA.
摘要：
Restructuring-induced catalytic activity is an intriguing phenomenon of fundamental importance to rational design of high-performance catalyst materials. We study three coppercomplex materials for electrocatalytic carbon dioxide reduction. Among them, the copper(II) phthalocyanine exhibits by far the highest activity for yielding methane with a Faradaic efficiency of 66% and a partial current density of 13 mA cm2 at the potential of - 1.06 V versus the reversible hydrogen electrode. Utilizing in-situ and operando X-ray absorption spectroscopy, we find that under the working conditions copper(II) phthalocyanine undergoes reversible structural and oxidation state changes to form 2 nm metallic copper clusters, which catalyzes the carbon dioxide-To-methane conversion. Density functional calculations rationalize the restructuring behavior and attribute the reversibility to the strong divalent metal ion-ligand coordination in the copper(II) phthalocyanine molecular structure and the small size of the generated copper clusters under the reaction conditions. © The Author(s) 2018.
语种：
英文
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含二氮杂芴基的旋光环氧化合物的合成及聚合研究
作者：
Sun Yunkai* ;Zhang Jin* ;Liu Huijun;Wang Xiaofeng
期刊：
有机化学 ,2018年38(1):253-258 ISSN：0253-2786
通讯作者：
Sun Yunkai;Zhang Jin
作者机构：
[Liu Huijun; Sun Yunkai; Wang Xiaofeng] Univ South China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Zhang Jin] Xiangtan Univ, Coll Chem, Xiangtan 411105, Peoples R China.
通讯机构：
[Sun Yunkai] U;[Zhang Jin] X;Univ South China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.;Xiangtan Univ, Coll Chem, Xiangtan 411105, Peoples R China.
关键词：
环氧化合物;手性;不对称合成;聚合
摘要：
以1,10-邻菲罗啉(1)为原料制备4,5-二氮芴-9-酮(2),并合成4,5-二氮杂芴(3)和9-亚甲基-4,5-二氮杂芴(5),再利用正丁基锂(或甲基锂)与上述两种二氮杂芴反应得到相应的锂盐,在-50 ℃下与旋光的环氧氯丙烷(ee>98%)反应得到光学纯的含二氮杂芴基取代末端环氧化合物,它们的ee值均大于98%.将4,5-二氮芴-9-酮与乙基溴化镁(或苯基溴化镁)反应,得到相应的叔醇.叔醇在氢氧化钾和四丁基溴化铵存在下,与旋光的环氧氯丙烷反应,也得到光学纯的含二氮杂芴基取代末端环氧化合物, ee值均大于97%.将末端环氧化合物在不同条件下聚合,得到分子量分布很窄的含二氮杂芴基的聚醚.通过核磁共振、元素分析、凝胶渗透色谱等手段对产物进行了表征,对影响聚合的相关因素做了探讨.
语种：
中文
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Computational insight into asymmetric uranyl-salophen coordinated with α, β-unsaturated aldehydes and ketones
作者：
Lan, Wen-Bo;Wang, Xiao-Feng* ;He, Li-Ping;Meng, Yan-Bin;Li, Jun;...
期刊：
Applied Organometallic Chemistry ,2018年32(3):e4137- ISSN：0268-2605
通讯作者：
Wang, Xiao-Feng;Nie, Chang-Ming
作者机构：
[Li, Jun; Lan, Wen-Bo; Meng, Yan-Bin; He, Li-Ping; Wang, Xiao-Feng] Xiangnan Univ, Sch Publ Hlth, Chenzhou 423000, Hunan, Peoples R China.;[Nie, Chang-Ming; Lan, Wen-Bo] Univ South China, Sch Chem & Chem Engn, Hengyang, Peoples R China.;[Qiu, Bin] Chenzhou City Ctr Dis Control & Prevent, Chenzhou 423000, Hunan, Peoples R China.
通讯机构：
[Wang, Xiao-Feng] X;[Nie, Chang-Ming] U;Xiangnan Univ, Sch Publ Hlth, Chenzhou 423000, Hunan, Peoples R China.;Univ South China, Sch Chem & Chem Engn, Hengyang, Peoples R China.
关键词：
alpha,beta-unsaturated aldehydes and ketones;asymmetric uranyl-salophen;coordination
摘要：
The study of the catalytic activity and activation mechanism of asymmetric uranyl-salophens with α, β-unsaturated aldehydes or α, β-unsaturated ketones, is a research hotspot. In this paper, the complexes of the uranyl–salophen(U-S) modified by unilateral benzene, coordinated with cyclohexenone, cyclopentenone and acrolein, were investigated using density functional theory calculations at the level of B3LYP/6-311G(d, p) basis set. The results showed that the uranyl-salophen(U-S) weakened the large π bond between C=C and C=O of the α, β-unsaturated aldehydes and ketones, making the unsaturated aldehydes and ketones activated. In addition, the molecular-recognition selectivity of the asymmetrical uranyl-salophen for cyclohexenone and cyclopentenone were much higher than for acrolein. Copyright © 2017 John Wiley & Sons, Ltd.
语种：
英文
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Creating Lithium-Ion Electrolytes with Biomimetic Ionic Channels in Metal–Organic Frameworks
作者：
Shen, Li;Wu, Hao Bin;Liu, Fang;Brosmer, Jonathan L.;Shen, Gurong;...
期刊：
Advanced Materials ,2018年30(23):e1707476 ISSN：0935-9648
通讯作者：
Lu, Yunfeng;Wang, Ge;Dunn, Bruce
作者机构：
[Lu, Yunfeng; Shen, Li; Wang, Xiaofeng; Liu, Fang; Wu, Hao Bin] Univ Calif Los Angeles, Dept Chem & Biomol Engn, Los Angeles, CA 90095 USA.;[Wu, Hao Bin] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China.;[Zink, Jeffrey I.; Brosmer, Jonathan L.] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.;[Wang, Xiaofeng] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Cai, Mei; Xiao, Qiangfeng] Gen Motors Res & Dev Ctr, 30500 Mound Rd, Warren, MI 48090 USA.
通讯机构：
[Lu, Yunfeng; Wang, Ge; Dunn, Bruce] U;Univ Calif Los Angeles, Dept Chem & Biomol Engn, Los Angeles, CA 90095 USA.;Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China.;Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA.
关键词：
biomimetic ionic channels;lithium-ion electrolyte;lithium-metal batteries;metal–organic frameworks;open metal sites
摘要：
Solid-state electrolytes are the key to the development of lithium-based batteries with dramatically improved energy density and safety. Inspired by ionic channels in biological systems, a novel class of pseudo solid-state electrolytes with biomimetic ionic channels is reported herein. This is achieved by complexing the anions of an electrolyte to the open metal sites of metal–organic frameworks (MOFs), which transforms the MOF scaffolds into ionic-channel analogs with lithium-ion conduction and low activation energy. This work suggests the emergence of a new class of pseudo solid-state lithium-ion conducting electrolytes. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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A label-free ultrasensitive and selective strategy for Pb(ii) assay by a multifunctional DNA probe-mediated rolling-circle amplified synthesis of the G-quadruplexes
作者：
Wang, Xiao-Feng;Wang, Yong-Sheng* ;Xiao, Xi-Lin;Lan, Wen-Bo;Zhou, Bin;...
期刊：
ANALYTICAL METHODS ,2018年10(25):3081-3088 ISSN：1759-9660
通讯作者：
Wang, Yong-Sheng
作者机构：
[Zhou, Bin; Chen, Si-Han; Xue, Jin-Hua; Wang, Xiao-Feng; Wang, Yong-Sheng] Univ South China, Coll Publ Hlth, Hengyang 421001, Peoples R China.;[Lan, Wen-Bo; Wang, Xiao-Feng] Xiang Nan Univ, Coll Publ Hlth, Chenzhou 423000, Peoples R China.;[Xiao, Xi-Lin] Univ South China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Wang, Yong-Sheng] U;Univ South China, Coll Publ Hlth, Hengyang 421001, Peoples R China.
摘要：
We report a label-free ultrasensitive and selective strategy for Pb(ii) assay by a multifunctional DNA probe (MDP)-mediated rolling-circle amplified synthesis of the G-quadruplexes. The MDP acted as a target recognition probe, a catalytic DNAzyme and a primer of rolling-circle amplification (RCA). The presence of Pb(ii) can induce the conformational switching of the MDP, resulting in the cleavage of the S-DNA in the MDP to release an E-DNA. The released E-DNA then initiated a RCA reaction with a reasonably devised padlock DNA template to produce an accumulated amount of repeated sequences. The RCA product in the present work was designed as a G-rich sequence, which could fold into thousands of G-quadruplex units. The G-quadruplex formed by RCA can specifically bind to NMM to result in an amplified fluorescence signal. Through these cascade amplifications, Pb(ii) ions can be detected at as low as 94.29 pM, which is much lower than those reported in related literature. We expect that this amplification strategy might be helpful in the design of a highly sensitive analytical platform for wide application in environmental and biomedical fields. © The Royal Society of Chemistry.
语种：
英文
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单手性螺旋聚醚的合成与应用研究进展
作者：
孙允凯;王梦蝶;王小峰
期刊：
南华大学学报(自然科学版) ,2018年32(6):52-59 ISSN：1673-0062
作者机构：
南华大学 化学化工学院,湖南 衡阳,421001
关键词：
螺旋聚醚;环氧化合物;阴离子聚合;不对称催化
摘要：
螺旋聚合物是化学家研究的热点之一.单手性螺旋聚醚作为螺旋聚合物中的一大类,近十余年来引起人们的广泛关注.介绍在手性环氧丙烷3号位碳上引进大位阻基团,通过阴离子聚合合成单手性螺旋聚醚,并介绍其在手性识别、不对称催化等方面的应用研究.
语种：
中文
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A modified gelcasting approach to fabricate microscale randomized 1–3 piezoelectric arrays
作者：
Xie, Rui* ;Wang, Xiaofeng;Peng, Guowen;Xie, Tian;Zhang, Dou;...
期刊：
Ceramics International ,2017年43(1):144-148 ISSN：0272-8842
通讯作者：
Xie, Rui
作者机构：
[Wang, Hongqing; Xie, Rui; Peng, Guowen; Wang, Xiaofeng; Wang, Guoping] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Xie, Tian] Univ South China, Sch Econ & Management, Hengyang 421001, Peoples R China.;[Zhang, Dou; Zhou, Kechao] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.;[Huang, Guoji] Aerosp Res Inst Mat & Proc Technol, Dept Mat Ind & Dev, Beijing 100076, Peoples R China.
通讯机构：
[Xie, Rui] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词：
Gelcasting;Lead zirconate titanate;Rheology;Piezoelectric arrays;Weibull analysis
摘要：
A modified gelcasting approach was used to fabricate the microscale randomized 1–3 piezoelectric array, which involves the in situ polymerization of hydantion epoxy resin and 3,3′-Diaminodipropylamine (DPTA) in the lead zirconate titanate (PZT) suspensions with low viscosity and high solid loading. Rheological results demonstrated that the hydantion epoxy resin concentration had little effect on the viscosity of the premix solution, and therefore the optimized solid loading of the suspensions with 15.0 wt% resin could reach as high as 55.0 vol%. Weibull analysis also revealed that a more homogenous microstructure was obtained derived from the 55.0 vol% PZT suspension, where the Weibull modulus and the characteristic flexural strength reached the maximum value of 12.57 and 80.94 MPa. The excellent randomized piezoelectric pillar array with superior structural integrity and high fidelity was successfully fabricated. ©2016 Elsevier Ltd and Techna Group S.r.l.
语种：
英文
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Photochromism adjustment by the conjugation of electron-withdrawing ligand in two metal organic complexes
作者：
Tan, Chun-Hong* ;Xiao, Xi-Lin;Wang, Xiao-Feng;Wang, Hong-Qing;Lin, Ying-Wu
期刊：
Inorganic Chemistry Communications ,2017年81:55-58 ISSN：1387-7003
通讯作者：
Tan, Chun-Hong
作者机构：
[Tan, Chun-Hong; Wang, Hong-Qing; Xiao, Xi-Lin; Lin, Ying-Wu; Wang, Xiao-Feng] Univ South China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Tan, Chun-Hong] U;Univ South China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词：
Crystal structure;Mechanism;Metal organic complexes;Photochromism
摘要：
Understanding the photochromic mechanism of MOCs, regulating and controlling their structure and related photochromic properties is one of the focuses of chemistry and materials science. In this paper, two isoreticular metal-organic complexes have been synthesized by reaction of Zinc nitrite and H(6)ttha in the presence of bpee or bpea as co-ligand, respectively. The photochromic properties of complex 1 and 2 have been investigated. Even though both complexes holding similar framework, it is intriguing that complex 1 with conjugated co-ligand bpee displays remarkable photochromism property, but this photochromic phenomenon almost disappears in complex 2 when the conjugated co-ligand bpee is replaced by the non-conjugated coligand bpea. The possible photochromic mechanism is illustrated in detail. What's more, the relationship of structure-property has been discussed. (C) 2017 Elsevier B.V. All rights reserved.
语种：
英文
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A novel asymmetric chair-like hydroxyl-bridged tetra-copper compound: Synthesis, supramolecular structure and magnetic property
作者：
Wang, Xiao-Feng* ;Du, Ke-Jie;Wang, Hong-Qing;Zhang, Xue-Li* ;Nie, Chang-Ming
期刊：
Journal of Molecular Structure ,2017年1138:155-160 ISSN：0022-2860
通讯作者：
Wang, Xiao-Feng;Zhang, Xue-Li
作者机构：
[Nie, Chang-Ming; Wang, Hong-Qing; Du, Ke-Jie; Wang, Xiao-Feng] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Zhang, Xue-Li] Shenzhen Univ, Sch Chem & Chem Engn, Shenzhen 518060, Peoples R China.
通讯机构：
[Wang, Xiao-Feng] U;[Zhang, Xue-Li] S;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;Shenzhen Univ, Sch Chem & Chem Engn, Shenzhen 518060, Peoples R China.
关键词：
Asymmetric tetranuclear cluster;Copper;Magnetic property;Thermal stability;X-ray diffraction
摘要：
A new polynuclear Cu(II) compound, [Cu<inf>4</inf>(bpy)<inf>4</inf>(OH)<inf>4</inf>(H<inf>2</inf>O)(BTC)]NO<inf>3</inf>·8H<inf>2</inf>O (1), was prepared by self-assembly from the solution of copper(II) nitrate and two kinds of ligands, 2,2′-bipyridine (bpy) and benzene-tricarboxylic acid (H<inf>3</inf>BTC). Single crystal structure analysis reveals that 1 features a rare asymmetric chair-like hydroxyl-bridged tetra-copper cluster: [Cu<inf>4</inf>(OH)<inf>4</inf>] core along with one H<inf>2</inf>O and one BTC<sup>3−</sup>occupied each terminal coordinated site. In addition, the magnetic property has been investigated. ©2017
语种：
英文
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Metallic coordination selectivity effect in the trinuclear M-3(RCOO)(6) secondary building units of three layer metal-carboxylate frameworks
作者：
Wang, Xiao-Feng* ;Wang, Hongqing;Wang, Shuhong* ;Li, Jun* ;Li, Shenbiao;...
期刊：
RSC Advances ,2016年6(18):14522-14530 ISSN：2046-2069
通讯作者：
Wang, Xiao-Feng;Wang, Shuhong;Li, Jun
作者机构：
[Wang, Hongqing; Wang, Xiao-Feng] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Wang, Shuhong] Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China.;[Li, Jun] Guangdong Univ Educ, Dept Chem, Guangzhou 510303, Guangdong, Peoples R China.;[Li, Shenbiao; Han, Xin] Cent China Normal Univ, Sch Chem, Wuhan 430079, Peoples R China.;[Zheng, Kang-Cheng] Sun Yat Sen Univ, Sch Chem & Chem Engn, Guangzhou 510275, Guangdong, Peoples R China.
通讯机构：
[Wang, Xiao-Feng] U;[Wang, Shuhong] C;[Li, Jun] G;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China.
摘要：
Three two-dimensional metal-carboxylate frameworks (MCFs), namely Zn<inf>3</inf>(BDC)<inf>3</inf>(py)<inf>2</inf>·2DMF (1), Mn<inf>3</inf>(BDC)<inf>3</inf>(DMF)<inf>4</inf>(2) and Co<inf>3</inf>(BDC)<inf>3</inf>(DMF)<inf>2</inf>(py)<inf>2</inf>(3) [H<inf>2</inf>BDC = 1,4-benzene dicarboxylic acid, py = pyridine, DMF = N,N′-dimethylformamide], have been synthesized by reaction of the M(NO<inf>3</inf>)<inf>2</inf>and H<inf>2</inf>BDC with py as base and DMF as solvent, under the microwave-assisted solvo-thermal conditions. Three MCFs were characterized by single crystal X-ray diffraction and mensurated its fluorescent or magnetic behaviors. The structural analyses reveal that 1-3 are constructed of the slightly dissimilar carboxylate bridged linear M<inf>3</inf>(RCOO)<inf>6</inf>(L<inf>T</inf>)<inf>2/4</inf>clusters where the coordination terminal ligand (L<inf>T</inf>) are py in 1, DMF in 2 and py/DMF in 3, respectively. The results demonstrated the different metal ions in two side of every SBU inclined to coordinate their respectively selected L<inf>T</inf>. The time-dependent density functional theory (TDDFT) calculations of 1 show that the emission peak of 423-428 nm (the experimental value is 425 nm) might be derived from the energy transition on the ligand-to-ligand charge transfer (LLCT) where electron densities residing on the π-bonding orbital of BDC<sup>2-</sup>are transferred to the π∗-anti-bonding orbital of pyridine. Variable-temperature magnetic susceptibility studies indicate the presence of antiferromagnetic exchange coupling within the M<inf>3</inf>-units of 2 and 3. ©The Royal Society of Chemistry 2016.
语种：
英文
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Streptavidin and gold nanoparticles-based dual signal amplification for sensitive magnetoelastic sensing of mercury using a specific aptamer probe
作者：
Huang, Yan-Qin;Yin, Ji-Cheng;Wang, Yong-Sheng* ;Xiao, Xi-Lin;Zhou, Bin;...
期刊：
Sensors and Actuators B-Chemical ,2016年235:507-514 ISSN：0925-4005
通讯作者：
Wang, Yong-Sheng
作者机构：
[Zhou, Bin; Yin, Ji-Cheng; Chen, Si-Han; Tang, Xian; Xue, Jin-Hua; Zhu, Yu-Feng; Huang, Yan-Qin; Wang, Yong-Sheng; Wang, Xiao-Feng] Univ South China, Coll Publ Hlth, Hengyang 421001, Peoples R China.;[Yin, Ji-Cheng] Ctr Dis Control & Prevent Zibo City Shandong Prov, Zibo 255000, Peoples R China.;[Xiao, Xi-Lin] Univ South China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Wang, Yong-Sheng] U;Univ South China, Coll Publ Hlth, Hengyang 421001, Peoples R China.
关键词：
Wireless magnetoelastic sensor;Mercury(II) specific aptamer probe;Graphene oxide;Streptavidin;Gold nanoparticles
摘要：
A novel wireless magnetoelastic sensor (WMS) strategy for Hg2+ assay was proposed using a specific aptamer probe and graphene oxide (GO) as an adsorbent. The introduction of Hg2+ results in the release of CDNA-biotin. This one can be adsorbed to the surface of GO that was immobilized on the WMS along with a decrease of the resonance frequency of the sensor. A biotin-streptavidin (SA)-gold nanoparticles( AuNPs) system designed in this work was used for amplifying response signal of the sensor. The signal intensity linearly correlated with Hg2+ concentration ranging from 2.80 to 88.9 nM with a detection limit of 0.885 nM. This WMS has additional advantages of being less time-consuming, low cost and remote query, and can be employed for the real-time and in situ detection of Hg2+ in real samples. The mechanism for structure switching and signal amplification was also studied by transmission electron microscopy and UV-vis spectra. (C) 2016 Elsevier B.V. All rights reserved.
语种：
英文
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吡啶二甲酸及邻菲啰啉混配Co（Ⅱ）化合物的合成与晶体结构
作者：
王小峰;廖锦嫦;谢睿
期刊：
南华大学学报(自然科学版) ,2016年30(3):84-87 ISSN：1673-0062
作者机构：
南华大学 化学化工学院,湖南 衡阳,421001
关键词：
钴;吡啶二羧酸;合成;晶体结构
摘要：
成功合成了一个2,6-吡啶二甲酸和邻菲啰啉混合配位的二价钴配合物[Co（HPDC）_2（phen）]·4H_2O,对其进行了元素分析及X-射线单晶结构表征.该化合物结晶于三斜晶系,P-1空间群,其晶体学参数为：Mr=643.42,a=0.69725（1）nm,b=1.32146（2）nm,c=1.49304（3）nm,α=74.689（1）°,β=89.396（1）°,γ=84.575（1）°,V=1.320.75（4）nm~3,Z=2,D_c=1.618 g/cm~3,μ=0.726 mm~（-1）,F（000）=662.化合物的结构由直接法解出,用基于F~2的全矩阵最小二乘法校正.最终可靠因子为R_1=0.0730,wR_2=0.2424及S=1.08.该化合物通过未配位羧基与结晶水之间的氢键及邻菲啰啉的π-π堆积等超分子作用最终形成三维超分子结构.
语种：
中文
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Computational insight into complex structures of thorium coordination with N,N'- bis(3-allyl salicylidene)-o-phenylenediamine
作者：
Lan, Wenbo;Gao, Sha;Lin, Ying-Wu;Liao, Lifu;Wang, Xiaofeng;...
期刊：
Journal of Molecular Modeling ,2016年22(9):224 ISSN：1610-2940
通讯作者：
Nie, Changming
作者机构：
[Lan, Wenbo; Gao, Sha; Liao, Lifu; Lin, Ying-Wu; Nie, Changming; Wang, Xiaofeng] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Nie, Changming] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词：
Crystal structure;Density functional theory;Organic ligands;Thorium
摘要：
Theoretical calculations on the structure of Th(IV) complex containing N, N’- bis(3-allyl salicylidene)-o-phenylenediamine (BASPDA) were performed using density functional theory (DFT) at the B3LYP/6-311G** level. The geometrical structural parameters and infrared spectra results of the Th(BASPDA)2 from the calculation were compared with the parallel dislocated structure (PDS) obtained in laboratory. The calculated structural parameters were in good agreement with the experimental results. In addition, based on the calculations, a stereoisomer SFS (staggered finger “ + ” structure) of the Th(BASPDA)2 complex was forecasted by the analysis of a comprehensive method. The charge distribution, structural parameters, bond order indices, spectral properties and thermodynamic properties as well as the molecular orbitals of the two possible crystal structures of Th(BASPDA)2 were also systematically studied. It was expected that this work could provide insightful information for understanding the properties of Th (BASPDA)2 complex at the molecular level. © 2016, Springer-Verlag Berlin Heidelberg.
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英文
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