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Optically active polymers bearing side‐chain photochromic moieties: synthesis and chiroptical properties of methacrylic and acrylic homopolymers with pendant L ‐lactic acid or L ‐alanine residues connected to trans ‐4‐aminoazobenzene
Author(s) -
Angiolini Luigi,
Caretti Daniele,
Carlini Carlo,
Salatelli Elisabetta
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021960902
Subject(s) - azobenzene , photochromism , polymer chemistry , monomer , circular dichroism , macromolecule , side chain , chemistry , chirality (physics) , azo compound , polymer , methacrylic acid , photochemistry , stereochemistry , organic chemistry , biochemistry , nambu–jona lasinio model , chiral symmetry breaking , physics , quantum mechanics , quark
Abstract Novel optically active monomers such as trans ‐( S )‐4‐(2‐methacryloylaminopropano‐ylamino)azobenzene, trans ‐( S )‐4‐(2‐methacryloyloxypropanoylamino)azobenzene, and trans ‐( S )‐4‐(2‐acryloylaminopropanoylamino)azobenzene have been prepared and homopolymerized by free radical initiation. Circular dichroism spectra of the resulting polymeric systems, as compared with those obtained for the corresponding low molecular weight analogues, purposely synthesized, allow one to suggest that the macromolecules assume in solution conformations with different homogeneity and prevailing chirality, depending on their structural requirements and solvent interactions.