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Synthesis of an Optically Active Poly( para ‐phenylene) Ladder Polymer
Author(s) -
Fiesel Rainer,
Huber Joachim,
Scherf Ullrich
Publication year - 1996
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199621111
Subject(s) - optically active , polymer , phenylene , anisotropy , conjugated system , polymer chemistry , materials science , molar ratio , crystallography , chemistry , optics , organic chemistry , physics , composite material , catalysis
A chiroptically active compound without a helical structure has been constructed in the ladder polymer 1 (R = 3.4‐C 6 H 3 (OC 6 H 13 ) 2 ), which has been synthesized from the corresponding enantiomerically pure OC 10 H 20 O‐bridged diboronic acid. The molar ellipticity of 1 [2.2 × 10 6 rad cm 2 mol −1 (461 nm)] leads to an anisotropy factor of g = 0.003, which is thus only an order of magnitude less than the maximum value (0.02) for chiral conjugated polymers so far reported.