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Ionic Self‐Assembled Derivative of Tetraphenylethylene: Synthesis, Enhanced Solid‐State Emission, Liquid‐Crystalline Structure, and Cu 2+ Detection Ability
Author(s) -
Lu Lin,
Ren XiangKui,
Liu Rui,
Jiang XuQiang,
Geng LaiYao,
Zheng JunFeng,
Feng Yakai,
Chen ErQiang
Publication year - 2017
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201700926
Subject(s) - tetraphenylethylene , supramolecular chemistry , quantum yield , luminescence , fluorescence , bromide , materials science , ionic bonding , crystallinity , carboxylate , ionic liquid , photochemistry , chemistry , crystallography , crystal structure , inorganic chemistry , ion , aggregation induced emission , stereochemistry , optoelectronics , organic chemistry , physics , quantum mechanics , catalysis
A novel tetraphenylethylene complex composed of 4′,4′′,4′′′,4′′′′‐(ethene‐1,1,2,2‐tetrayl)tetrabiphenyl‐4‐carboxylic acid (H 4 ETTC) and dimethyldioctadecylammonium bromide (DOAB) with enhanced solid‐state emission is designed and synthesized through an ionic self‐assembly (ISA) strategy. The aggregation‐induced emission property, phase behavior, and supramolecular structure of the complex are characterized by a combination of experimental measurements. The experimental results reveal that the ISA complex can self‐assemble into an ordered helical supramolecular structure with enhanced luminescent properties, although the ETTC cores possess extensive conjugation and high rigidity. Due to the prolonged conjugation length, the fluorescence quantum yield of ETTC–DOAB is boosted to 66 %. Moreover, it is demonstrated that assemblies of the ISA complex are an effective sensor for Cu 2+ . Owing to the disassembly modulation of ETTC–DOAB aggregations, the fluorescence emission of the assemblies can be selectively and sensitively quenched by Cu 2+ , with a detection limit as low as 12.6 n m . The enhanced emission efficiency, in combination with the liquid crystallinity and superior sensing performance to Cu 2+ , make the ETTC–DOAB complex a potential candidate for the fabrication of a luminescent device and chemosensor for Cu 2+ detection.