Premium
Asymmetric Induction in the Preparation of Helical Receptor–Anion Complexes: Ion‐Pair Formation with Chiral Cations
Author(s) -
Haketa Yohei,
Bando Yuya,
Takaishi Kazuto,
Uchiyama Masanobu,
Muranaka Atsuya,
Naito Masanobu,
Shibaguchi Hiroshi,
Kawai Tsuyoshi,
Maeda Hiromitsu
Publication year - 2012
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.201202196
Subject(s) - diastereomer , ion , chemistry , circular dichroism , ammonium bromide , pyrrole , crystallography , bromide , supramolecular chemistry , luminescence , stereochemistry , inorganic chemistry , materials science , crystal structure , organic chemistry , optoelectronics , pulmonary surfactant , biochemistry
Asymmetry through ion pairing : Upon addition of chloride and bromide ions, as chiral ammonium salts, to solutions of pyrrole‐based π‐conjugated linear oligomers, helical structures form with asymmetric induction, which is guided by the formation of diastereomeric ion pairs with chiral counter cations (see picture). These ions pairs exhibit circular dichroism (CD) and strong circularly polarized luminescence (CPL) with g lum values of greater than 0.1.