A Fluorescent Chemosensor for Transition-Metal Ions Based on Optically Active Polybinaphthyl and 2,2′-Bipyridine

✍ Scribed by Yan Liu; Qian Miao; Shuwei Zhang; Xiaobo Huang; Lifei Zheng; Yixiang Cheng

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 225 KB
• Volume: 209
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.200700460

✦ Synopsis

Abstract

The linear conjugated polymer based on the 5,5′‐positions of chiral 1,1′‐binaphthyl shows strong green‐blue fluorescence with high fluorescence quantum efficiency due to the extended π‐electronic structure between the chiral repeating unit and the 2,2′‐bipyridyl conjugated linker unit. Cu^2+^ and Ni^2+^ can form non‐radiative metal‐to‐ligand charge‐transfer complexes with the polymer, and Co^2+^, Mn^2+^, Cd^2+^, Zn^2+^, Fe^2+^ can cause effective fluorescent quenching, which can be attributed to an energy transfer from the π‐conjugated chiral polymer to the metal complexes. A better understanding of energy‐transfer processes in the polymers can provide information for the design of more sensitive materials.

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