Solvent-dependent chromogenic sensing for Cu2+ and fluorogenic sensing for Zn2+ and Al3+: a multifunctional chemosensor with dual-mode
- 주제(키워드) Copper ion , Zinc ion , Aluminum ion , Calorimetric , Fluorescent , Reversible
- 등재 SCIE, SCOPUS
- 발행기관 PERGAMON-ELSEVIER SCIENCE LTD
- 발행년도 2014
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000109752
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.tet.2014.08.026
초록/요약
A new multifunctional chemosensor 1 was synthesized and characterized by spectroscopic tools along with a single crystal X-ray crystallography. It can exhibit selective recognition responses toward Cu2+, Zn2+ and Al3+ in different solvent systems with bimodal methods (colorimetric and fluorescence). This sensor 1 detected Cu2+ ions through a distinct color change from colorless to yellow in aqueous solution. Interestingly, the receptor 1 was found to be reversible by EDTA. The detection limit (11 mu M) of 1 for Cu2+ is much lower than WHO guideline (30 mu M) in drinking water. In addition, the sensor 1 showed significant fluorescence enhancements in the presence of Zn2+ ion and Al3+ ion in two different organic solvents (DMF and MeCN), respectively. The binding modes of the three complexes were determined to be a 1:1 complexation stoichiometry through Job plot, ESI-mass spectrometry analysis, and H-1 NMR titration. (C) 2014 Elsevier Ltd. All rights reserved.
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