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Enhanced Fluorescence Quenching of 2‐Thiohydantoin‐Containing Conjugated Polymers: Applications for Ion Sensing
Author(s) -
Zeng Weifeng,
Yong Xue,
Yang Xiaodong,
Yan Yichen,
Lu Xinwei,
Qu Jinqing,
Liu Ruiyuan
Publication year - 2014
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201400110
Subject(s) - fluorescence , quenching (fluorescence) , polymer , conjugated system , photochemistry , phenylene , molecule , ion , chemistry , polymer chemistry , metal ions in aqueous solution , materials science , organic chemistry , optics , physics
A novel poly(phenylene ethynylene) containing 2‐thiohydantoin [poly( 1 )] is synthesized. The addition of F − quenches the fluorescence, while the fluorescence of the solution only changes slightly upon addition of other anions, indicating the sensing ability of poly( 1 ) toward F − . The addition of Ag + quenches the fluorescence of the polymer, whereas the addition of other metal ions results in only slight changes to the fluorescence. Compared with its small‐molecule counterpart, the Stern–Volmer quenching constants of poly( 1 ) toward F − and Ag + are 165 and 105 times greater, respectively. This result indicates the amplified quenching effect of poly( 1 ).