期刊
JOURNAL OF LUMINESCENCE
卷 173, 期 -, 页码 165-170出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2016.01.009
关键词
ESIPT; Chemo sensor; TD-SCF; Fluorescence; Benzimidazole
类别
资金
- DST-INSPIRE, New Delhi [IFA12-CH-59]
Excited State Intramolecular Proton Transfer based benzimidazole derivative having push-pull effect has been synthesized and investigated their photophysical behavior towards various anions. The probe 2 has been used for selective estimation of F- and CH- anions and signaled the binding event through formation of new absorption band at 465 nm. The probe 2 opens different emission channels at 425 nm in the presence of CH- ions and two new emission bands at 435 nm and 365 nm in case of F- ions. The probe 2 behaved as chemodosimeter for CH- ions which have been proved by H-1 NMR and whereas fluoride caused hydrogen bonding interactions with probe 2 and restricted the ESIPT emission at 505 nm from OH to nitrogen of benzimidazole moiety to release its enol emission. The differential behavior of F- ions and CH- have been confirmed through DFT calculations. (C) 2016 Elsevier B.V. All rights reserved.
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