期刊论文

Yang, Shengyuan

英文

Microchimica Acta

0026-3672

2019

186

8

1-9

10.1007/s00604-019-3625-0

National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11205085]; Department of Education Excellent Youth Project of Hunan Province in China [15B202]; Natural Science Foundation Project of Hunan Province [2018JJ2323]; Technology Innovation Guidance Program Clinical Medical Technology Innovation Guide Project of Hunan Province [2017SK50218]; Open Project Program of the State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University (Changsha, China) [2012018]; Defense Industrial Technology Development Program [JCKY2016403C001]; Key Laboratory of Hengyang for Health Hazard Factors Inspection and Quarantine [2018KJ110]

本校为第一且通讯机构

A dually responsive fluorescent probe for determination of U(IV) and mercury(II) ions was synthesized. The probe consists of a cytosine-rich hairpin DNA loaded with silver nanoclusters (DNA-AgNCs). The fluorescence of the AgNCs is found to be quenched by UO2(II) at pH 5.0 and Hg(II) at pH 7.0 due to combined static and dynamic quenching. Under the optimal conditions, the green fluorescence of the DNA-AgNCs, best measured at excitation/emission wavelengths of 420/525 nm, decreases in the 4.0 to 75 pM UO2(II) concentration range, and in the 0.3 to 8.0 nM Hg(II) concentration range. The respectiv...