Rosamine-Based Fluorescent Chemosensor for Selective Detection of Silver(I) in an Aqueous Solution
详细信息 查看全文
- 作者：Shohei Iyoshi ; Masayasu Taki ; Yukio Yamamoto
- 刊名：Inorganic Chemistry
- 出版年：2008
- 出版时间：May 19, 2008
- 年：2008
- 卷：47
- 期：10
- 页码：3946 - 3948
- 全文大小：170K
- 年卷期：v.47,no.10(May 19, 2008)
- ISSN：1520-510X
文摘
The synthesis and photophysical properties of a rosamine-based fluorescent chemosensor, RosAg, for detecting Ag ion in an aqueous solution are described. This fluorescent sensor has a negligible quantum yield (<0.005) in the absence of Ag+, whereas a significant increase in fluorescence is observed upon complexation with Ag+ under physiological conditions. The crystal structure of the silver complex with the chelator moiety of RosAg reveals a trigonal-planar coordination geometry in which three S atoms occupy the metal center. Although a strong coordinative interaction of Ag−N is not observed in the crystal structure, the 1H NMR experiments suggest that aniline nitrogen is likely to be associated with the Ag+ center in the solution state. This may inhibit the photoinduced electron transfer process and result in the enhancement of fluorescence.