Journal
DYES AND PIGMENTS
Volume 92, Issue 3, Pages 961-966Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2011.08.005
Keywords
Dithienylethene; Imidazole; Molecular recognition; Photochromism; Fluorescence; Iron(III) ions
Funding
- National Natural Science Foundation of China [2072039, 20931006, 21072070]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT0953]
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Four novel imidazole-based dithienylethenes have been successfully synthesized in good yields. Their structures have been confirmed by NMR spectrometry, mass spectrometry, and elemental analyses. UV/Vis absorption spectra indicated that these dithienylethenes can easily isomerize between the open-ring and closed-ring isomers upon irradiation with UV or visible light in solution, and that the respective closed-ring isomers show decreased fluorescence properties compared with the open-ring isomers. Moreover, the open-ring and closed-ring isomers display high selectivity toward Fe3+, such that the addition of Fe3+ obviously suppresses their fluorescence intensity. (C) 2011 Elsevier Ltd. All rights reserved.
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