A near-infrared fluorescent chemodosimeter for silver(I) ion based on an expanded porphyrin

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• 作者：Xunjin Zhu ; Shitao Fu ; Wai-Kwok Wong ; Wai-Yeung Wong
• 关键词：Transition metals ; Porphyrins ; Sensors ; Luminescence ; Silver
• 刊名：Tetrahedron Letters
• 出版年：2008
• 期刊代码：109_00404039
• 类别：ch
• 出版时间：10 March 2008
• 卷：49
• 期：11
• 页码：1843-1846
• 文件大小：394 K

摘要

An expanded porphyrin [26]hexaphyrin(1.1.1.1.1.1) was exploited as a fluorescent chemodosimeter for Ag⁺ ions with high sensitivity and selectivity via near-infrared luminescence above 900 nm, a region that is free from optical interference in the visible wavelength range induced by the commonly used matrix and other organic compounds. The association constant for the Ag⁺–porphyrin complexation was evaluated by spectroscopic titration method to be 7.24 × 10¹⁰ M⁻¹.