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Induction of Preferential Helical Screw Senses in Optically Inactive Polysilanes via Chiral Solvation
Author(s) -
Dellaportas Paraskevi,
Jones Richard G.,
Holder Simon J.
Publication year - 2002
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(20020101)23:2<99::aid-marc99>3.0.co;2-m
Subject(s) - circular dichroism , optically active , solvation , conjugated system , polymer , materials science , benzene , photochemistry , side chain , cotton effect , polymer chemistry , vibrational circular dichroism , chemistry , solvent , crystallography , organic chemistry
Two optically active solvents were synthesised, ( S )‐(–)‐2‐methyl‐1‐propoxybutane and ( S )‐(–)‐(2‐methylbutoxymethyl)benzene. The main chain conformations of poly(methylphenylsilane) and poly(hexylmethylsilane) in these solvents were investigated using optical UV‐visible and circular dichroism spectroscopy. It was observed that dissolving these inherently achiral polysilanes in optically active solvents induces the polymer chains to adopt preferred helical screw senses. This is the first example of induction of optical activity in conjugated polymers through chiral solvation.