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Synthesis and chiroptical properties of optically active photochromic polymers with side‐chain L ‐lactic residues connected to trans ‐azobenzene moieties bearing a reactive formyl electron‐withdrawing group
Author(s) -
Angiolini Luigi,
Caretti Daniele,
Carlini Carlo,
Giorgini Loris,
Salatelli Elisabetta
Publication year - 1999
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/(sici)1521-3935(19990201)200:2<390::aid-macp390>3.0.co;2-a
Subject(s) - solvatochromism , photochromism , azobenzene , monomer , polymer chemistry , chromophore , photochemistry , polymer , circular dichroism , pendant group , side chain , methacrylate , chemistry , optically active , materials science , organic chemistry , molecule , stereochemistry
The synthesis of a novel optically active monomer containing a photochromic chromophore, trans ‐( S )‐4‐(2‐methacryloyloxypropanoyloxy)‐4´‐formylazobenzene, is described. The monomer was radically homopolymerized and copolymerized with methyl methacrylate to afford the corresponding optically active polymers, which were fully characterized. The chirooptical and conformational properties in solution of the resulting polymers were investigated by circular dichroism and solvatochromism measurements and compared with those of the corresponding low molecular weight model compound, trans ‐( S )‐4‐(2‐pivaloyloxypropanoyloxy)‐4´‐formylazobenzene, purposely synthesized.