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Enhanced Circularly Polarized Luminescence in Emissive Charge‐Transfer Complexes
Author(s) -
Han Jianlei,
Yang Dong,
Jin Xue,
Jiang Yuqian,
Liu Minghua,
Duan Pengfei
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201902090
Subject(s) - luminescence , circular polarization , stacking , supramolecular chemistry , materials science , magnetic dipole transition , dipole , chirality (physics) , acceptor , transition dipole moment , polarization (electrochemistry) , photochemistry , crystallography , chemical physics , optoelectronics , chemistry , magnetic dipole , magnetic field , electric dipole transition , condensed matter physics , crystal structure , physics , organic chemistry , quantum mechanics , nambu–jona lasinio model , chiral symmetry breaking , quark
Achieving a large dissymmetry factor ( g lum ) is a challenge in the field of circularly polarized luminescence (CPL). A chiral charge‐transfer (CT) system consisting of chiral electron donor and achiral electron acceptor shows bright circularly polarized emission with large g lum value. The chiral emissive CT complexes could be fabricated through various approaches, such as grinding, crystallization, spin coating, and gelatinization, by simply blending chiral donor and achiral acceptor. The structural synergy originating from π–π stacking and strong CT interactions resulted in the long‐range ordered self‐assembly, enabling the formation of supramolecular gels. Benefiting from the large magnetic dipole transition moment in the CT state, the CPL activity of CT complexes exhibited large circular polarization. Our design strategy of the chiral emissive CT complexes is expected to help the development of new molecular engineering strategies for designing highly efficient CPL‐active materials.