کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5278249 | 1385599 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A cationic porphyrin-based self-assembled film for mercury ion detection
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A cationic 5,15-(p-(9,9-bis(6-trimethylammoniumhexyl)fluorenylethynyl)phenyl)porphyrin tetrabromide was synthesized and the self-assembled films were used for Hg2+ detection in aqueous media. The detection response is based on fluorescence quenching of the porphyrin molecule upon coordination with Hg2+. The detection shows high selectivity for Hg2+ over Cu2+, Zn2+, Pb2+, Cd2+, Mn2+, Ni2+, Co2+ and Ca2+. A linear response toward Hg2+ in a concentration range of 1Â ÃÂ 10â10-1Â ÃÂ 10â6Â M was observed for the film with a detection limit of 0.1Â nM. The cationic porphyrin film shows higher stability and significant improvement in detection sensitivity, as compared to other porphyrin-based sensors. The amphiphilic cationic nature of the porphyrin synthesized also allows for the direct deposition of a porphyrin layer on a bare glass surface through self-assembly.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 49, Issue 14, 31 March 2008, Pages 2311-2315
Journal: Tetrahedron Letters - Volume 49, Issue 14, 31 March 2008, Pages 2311-2315
نویسندگان
Zhen Fang, Bin Liu,