کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5399402 | 1505905 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A dihydrazone based fluorescent probe for selective determination of Al3+ ions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
A highly selective fluorescent sensor N,Nâ²-bis((2-hydroxynaphthalen-1-yl)methylene) oxalohydrazide (H2ohn) for the determination of Al3+ ions was synthesized and characterized by different physico-chemical and spectroscopic techniques. The single crystal structure of H2ohn receptor has also been reported. The H2ohn shows an enhanced fluorescence in the presence of Al3+ ions in ethanol-water (2:3 v/v) solution. Other cations viz. Na+, K+, Mg2+, Ca2+, Mn2+, Fe3+, Co2+, Ni2+, Cu2+, Zn2+, Pb2+, Cd2+ and Hg2+ show no appreciable change in fluorescence intensity. The binding mode of H2ohn receptor with Al3+ was studied by UV-visible, fluorescence and 1H NMR titrations. The receptor acts as a dibasic hexadentate ligand and interacts with two Al3+ ions with a high binding constant KB=2.62Ã1011Â Mâ2. The lowest detection limit for Al3+ complex of H2ohn was determined to be 8.56Ã10â10Â M. The structures of H2ohn and its Al(III) complex were also optimized by DFT calculations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 155, November 2014, Pages 7-14
Journal: Journal of Luminescence - Volume 155, November 2014, Pages 7-14
نویسندگان
Divya Pratap Singh, Vinod P. Singh,