کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5400551 1505912 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
1-(2-Methyl-5H-chromeno[2,3-b]pyridin-5-ylidene) hydrazone as fluorescent probes for selective zinc sensing in DMSO
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
1-(2-Methyl-5H-chromeno[2,3-b]pyridin-5-ylidene) hydrazone as fluorescent probes for selective zinc sensing in DMSO
چکیده انگلیسی
Two methyl-chromeno-pyridinylidene hydrazone derivatives L1, a cyclen derivative, and L2 were studied as potential fluorescent OFF-ON sensors towards Zn2+ in DMSO. Upon addition of one equivalent of Zn2+, L1 fluorescence was quenched, but addition of a second equivalent of Zn2+ restored partially the signal. Therefore ZnL1 behaved as a OFF-ON sensor for zinc. By comparison, L2 behaved as a very sensitive probe for zinc. ZnL1 and L2 sensor efficiencies were correlated to Zn2+ coordination via the hydrazone moiety of the fluorophore, which prevented a photoinduced electron transfer (PET), and allowed an efficient CHelation-Enhanced Fluorescence (CHEF) effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 148, April 2014, Pages 202-206
نویسندگان
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