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Synthesis of a Fluorescent Polymer Bearing Covalently Linked Thienylene Moieties and Rhodamine for Efficient Sensing
Author(s) -
Zhu Mei,
Zhou Chunjie,
Zhao Yingjie,
Li Yongjun,
Liu Huibiao,
Li Yuliang
Publication year - 2009
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200900210
Subject(s) - förster resonance energy transfer , rhodamine , conjugated system , fluorescence , photochemistry , covalent bond , rhodamine b , metal ions in aqueous solution , acceptor , polymer , materials science , phenylene , chemistry , ion , organic chemistry , physics , quantum mechanics , photocatalysis , catalysis , condensed matter physics
A novel conjugated polymer (RB‐PPETE) of poly[ p ‐(phenylene ethynylene)‐ alt ‐(thienylene ethynylene)] (PPETE) bearing covalently linked thienylene rings and Rhodamine B units has been synthesized and successfully used to detect metal ions. The Rhodamine B exists as a lactone, which is colorless and non‐fluorescent. Hg 2+ ions can induce the Rhodamine group to form a ring‐opened state. The fluorescence resonance energy transfer (FRET) was demonstrated in the polymer, and in the presence of Hg 2+ ions the excitation energy along the backbone of the conjugated polymer is transferred to the energy acceptor (Rhodamine B), which leads to a visual color change of the solution from slight yellow to orange. Meanwhile, this new system shows outstanding Hg 2+ ‐selective FRET off–on type fluoroionophoric properties among the representative metal ions in tetrahydrofuran.