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Synthesis and Cyclization‐Induced Charge Transfer of Rectangular Bisterthiophenesiloxanes
Author(s) -
Li Chensen,
Hu Jian,
Tashiro Kohji,
Ren Zhongjie,
Yan Shouke
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201903462
Subject(s) - intramolecular force , terthiophene , excited state , photochemistry , redistribution (election) , stacking , conjugated system , dipole , chemistry , materials science , atomic physics , physics , stereochemistry , polymer , organic chemistry , politics , political science , law
Cyclization‐modified terthiophene displays the change of emission behavior from locally excited (LE) to the intramolecular charge transfer (ICT) state. The rectangular bisterthiophenesiloxanes (DSiTh) was successfully prepared by π–π‐stacking‐aided hydrogen‐bonding interactions. Cyclization‐induced ICT in DSiTh could be observed, which was confirmed by absorption spectra, fluorescence spectra, and quantum chemistry analysis. The cyclization produces a strong intramolecular electron redistribution of a highly packed π‐conjugated terthiophene. Thus, a distinctive variation of the dipole moment and a through‐space ICT happen.