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Anion‐Coordination‐Induced Turn‐On Fluorescence of an Oligourea‐Functionalized Tetraphenylethene in a Wide Concentration Range
Author(s) -
Zhao Jie,
Yang Dong,
Zhao Yanxia,
Yang XiaoJuan,
Wang YaoYu,
Wu Biao
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201402169
Subject(s) - fluorescence , intramolecular force , chemistry , ion , turn (biochemistry) , coordination complex , ligand (biochemistry) , aggregation induced emission , photochemistry , crystallography , stereochemistry , organic chemistry , receptor , biochemistry , physics , quantum mechanics , metal
A tetrakis(bisurea)‐decorated tetraphenylethene (TPE) ligand ( L 2 ) was designed, which, upon coordination with phosphate ions, displays fluorescence “turn‐on” over a wide concentration range, from dilute to concentrated solutions and to the solid state. The fluorescence enhancement can be attributed to the restriction of the intramolecular rotation of TPE by anion coordination. The crystal structure of the A 4 L 2 (A=anion) complex of L 2 with monohydrogen phosphate provides direct evidence for the coordination mode of the anion. This “anion‐coordination‐induced emission” (ACIE) is another approach for fluorescence turn‐on in addition to aggregation‐induced emission (AIE).