期刊论文

An Infrared Spectroscopic Quantitative Study on the Lewis Base Property of Al2O3 with Boric Acid Trimethyl Ester

中文

南华大学学报(自然科学版)

1673-0062

2005

19

2

32-35

10.19431/j.cnki.1673-0062.2005.02.009

省教育厅课题基金资助项目（04C566）；

本校为第一机构

采用硼酸三甲酯作为探针分子对Al2O3的路易斯碱性进行了红外光谱定量研究.Al2O3对硼酸三甲酯的吸附使硼酸三甲酯在1 360 cm-1的谱峰分裂成1 409 cm-1和1 287 cm-1两个峰,1 036 cm-1的谱峰紫移到1 067 cm-1.低压下吸收峰高与硼酸三甲酯压力成正比,与Al2O3含量成正比.结果表明Al2O3有一定的路易斯碱强度,与硼酸三甲酯之间的吸附是单分子层化学吸附.

The Lewis base property of Al_2O_3 has been studied quantitatively with an infrared spectroscopic approach by using boric acid trimethyl ester (BATE) as the probe molecule. The adsorption of BATE by Al_2O_3 makes the 1360cm-1 absorb peak of BATE didived into two absorb peaks (1409cm-1 and 1287cm-1) and the 1036cm-1 absorb peak shifted to 1067cm-1. Under low pressure the height of the absorb peaks is direct proportion to the pressure of BATE and to the Al_2O_3 content. The results showed that there is certain strength of Lewis base with Al_2O_3 and the adsorpt...