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A Novel Conjugated Polymer Consists of Benzimidazole and Benzothiadiazole: Synthesis, Photophysics Properties, and Sensing Properties for Pd 2+
Author(s) -
Liu Kuan,
Hu Zijun
Publication year - 2020
Publication title -
journal of polymer science
Language(s) - English
Resource type - Journals
eISSN - 2642-4169
pISSN - 2642-4150
DOI - 10.1002/pol.20200005
Subject(s) - sonogashira coupling , benzimidazole , monomer , polymer , conjugated system , selectivity , palladium , fluorescence , stoichiometry , photochemistry , photoluminescence , chemistry , polymer chemistry , quenching (fluorescence) , materials science , combinatorial chemistry , organic chemistry , catalysis , optoelectronics , physics , quantum mechanics
A conjugated polymer PPBIBTE based on benzimidazole and benzothiadiazole was synthesized through palladium‐catalyzed sonogashira cross‐coupling reaction. The chemical structures of the monomers and the polymer were indicated by 1 H NMR, and investigation of photophysics properties and sensing optical properties for metal ions were observed by ultraviolet–visible and photoluminescence spectroscopy. PPBIBTE showed remarkable selectivity for Pd 2+ by “turn‐off” fluorescence sensing progress. In addition, the Stern–Volmer and Benesi‐Hildebrand plots were used to reveal the interaction between the polymer and Pd 2+ , while job's method was applied to calculate the determination of stoichiometry. The results demonstrate that PPBIBTE can utilize static quenching for Pd 2+ by forming a 1:1 complex. And it is a potential sensing material as fluorescence chemosensor for Pd 2+ with high selectivity and sensitivity. © 2020 Wiley Periodicals, Inc. J. Polym. Sci. 2020 , 58 , 831‐842
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