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AIE Triggers the Circularly Polarized Luminescence of Atomically Precise Enantiomeric Copper(I) Alkynyl Clusters
Author(s) -
Zhang MiaoMiao,
Dong XiYan,
Wang ZhaoYang,
Li HaiYang,
Li ShiJun,
Zhao Xueli,
Zang ShuangQuan
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201908909
Subject(s) - luminescence , enantiomer , copper , crystallography , cluster (spacecraft) , chemistry , materials science , stereochemistry , optoelectronics , organic chemistry , computer science , programming language
Atomically precise enantiomeric metal clusters are scarce, and copper(I) alkynyl clusters with intense circularly polarized luminescence (CPL) responses have not been reported. A pair of chiral alkynyl ligands, (R/S)‐2‐diphenyl‐2‐hydroxylmethylpyrrolidine‐1‐propyne (abbreviated as R/S‐DPM ) we successfully prepared and single crystals were characterized of optically pure enantiomeric pair of atomically‐precise copper(I) clusters, [Cu 14 (R/S‐DPM) 8 ](PF 6 ) 6 (denoted as R/S‐Cu 14 ), which feature bright red luminescence and CPL with a high luminescence anisotropy factor ( g lum ). A dilute solution containing R/S‐Cu 14 was nonluminescent and CPL inactive at room temperature. Crystallization‐ and aggregation‐induced emission (CIE and AIE, respectively) contribute to the triggering of the CPL of R/S‐Cu 14 in the crystalline and aggregated states. Their AIE behavior and good biocompatibility indicated applications of these copper(I) clusters in cell imaging in HeLa and NG108‐15 cells.