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Front Cover: One‐Step Simultaneous Synthesis of Circularly Polarized Luminescent Multiple Helicenes Using a Chrysene Framework (7/2021)
Author(s) -
Ikai Tomoyuki,
Yamakawa Shoya,
Suzuki Nozomu,
Yashima Eiji
Publication year - 2021
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202100207
Subject(s) - helicene , chrysene , luminescence , circular dichroism , intramolecular force , circular polarization , chemistry , chirality (physics) , axial chirality , stereochemistry , photochemistry , materials science , optics , physics , optoelectronics , organic chemistry , anthracene , enantioselective synthesis , molecule , nambu–jona lasinio model , chiral symmetry breaking , quantum mechanics , catalysis , quark , microstrip
A series of multiple helicenes (double, triple, and quadruple helicenes) comprising [4]helicene and/or [5]helicene substructures with dynamic and/or static helical chirality are simultaneously and quantitatively synthesized in one step through electrophile‐induced intramolecular alkyne benzannulations of a single starting material containing a chrysene framework with or without a combination of aryl migration under acidic conditions. Optically‐active double and triple helicenes show intense circular dichroism and circularly polarized luminescence. More information can be found in the Full Paper by Tomoyuki Ikai, Eiji Yashima et al.