Highly selective colorimetric and electrochemical Pb2+ detection based on TTF-pi-pyridine derivatives |
| |
Authors: | Xue Hai Tang Xin-Jing Wu Li-Zhu Zhang Li-Ping Tung Chen-Ho |
| |
Affiliation: | Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China. |
| |
Abstract: | [reaction: see text] The pyridineethenyl-substituted tetrathiafulvalene (TTF) compounds, 4-(4-pyridineethenyl)tetrathiafulvalene (1a) and 4,4'(5')-[bis-(4-pyridineethenyl)]tetrathiafulvalene (2a) together with the styryl-substituted TTF compounds, 4-styryltetrathiafulvalene (1b) and 4,4'(5')-bis-styryltetrathiafulvalene (2b), have been designed and synthesized. All these compounds exhibit strong absorption bands in the range of 370 to 550 nm, which are assigned to the intramolecular charge-transfer transition from the HOMO in TTF to the LUMO in the pyridyl or phenyl group. Compared to compounds 1b and 2b, the pyridineethenyl-substituted TTF compounds 1a and 2a show remarkable sensing and coordinating properties to Pb2+. With the addition of micromolar concentrations of Pb2+ to the solution, 1a or 2a displays dramatic changes in the UV-vis absorption spectrum, 1H NMR spectrum, and redox property. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|