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篇目详细内容 |
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【篇名】 |
A novel intramolecular charge transfer fluorescent chemosensor highly selective for Cu2+ in neutral aqueous solutions |
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【刊名】 |
Frontiers of Chemistry in China |
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【刊名缩写】 |
Front. Chem. China |
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【ISSN】 |
1673-3495 |
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【EISSN】 |
1673-3614 |
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【DOI】 |
10.1007/s11458-010-0114-8 |
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【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
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【出版年】 |
2010 |
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【卷期】 |
5
卷2期 |
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【页码】 |
178-183
页,共
6
页 |
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【作者】 |
Qingxian LIAO;
Aifang LI;
Zhao LI;
Yibin RUAN;
Yunbao JIANG;
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【关键词】 |
fluorescent chemosensor; Cu2+; fluorescence quenching; intramolecular charge transfer; 1; 3; 4-thiodiazole |
【摘要】 |
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A selective and sensitive intramolecular charge transfer (ICT) fluorescent chemosensor was designed for Cu2+ in neutral aqueous solutions of pH 7.0. The design of this totally water-soluble fluorescent chemosensor was based on the binding motif of Cu2+ to aminoacid, which is coupled to an ICT fluorophore bearing a 1,3,4-thiodiazole moiety in the electron acceptor. The formation of a 1:1 complex of Cu2+ to 2 was suggested to lead to fluorescence quenching. The quenching obeyed Stern-Volmer theory in neutral aqueous solution of pH 7.0 for Cu2+ over 5.0 × 10−7 to 3.0 × 10−5 mol·L−1, with a quenching constant of 1.8 × 105 L·mol−1 and a detection limit of 2.0 × 10−7 mol·L−1. The binding of Cu2+ to 2 can be fully reversed by addition of chelator EDTA, affording a reversible sensing performance. |
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