期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 270, 期 -, 页码 256-262出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.05.030
关键词
Solid sensor; Hg2+ recognition; Turn-on fluorescence; Naphthalimide derivative; Fluorescence probe
资金
- MINECO [MAT2017-88923]
A Selective fluorescence solid sensor for Hg2+ detection in aqueous solution (M-MBZN) has been developed by grafting N-(2-hydroxyethyl)-4-(4-(1H-benzo[d]imidazol-2-yl)methyl) piperazine-1-yl)-1,8-naphthalimide (MBZN) to a photo-crosslinked M-Cl membrane reaction through the acid chloride groups. The resulting fluorescence sensor undergoes fluorescence enhancement upon binding mercuric ions which provokes a photo induced electron transfer (PET) inhibition process from the piperazine to the naphthalimide moiety. Various photochemical parameters were determined by using pH-dependent absorption and fluorescence spectroscopies as well as the selective detection of Hg2+. The sensing membrane possesses a switchable turn-on fluorescence response to Hg2+ in pure water; it is easy to use and reusable and shows high selectivity and sensitivity.
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