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Photochromic and Photoresponsive Properties of Methacrylic Polymers Bearing Optically Active Hydroxysuccinimide in the Side Chain
Author(s) -
Angiolini Luigi,
Benelli Tiziana,
Giorgini Loris
Publication year - 2007
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.200700160
Subject(s) - photochromism , chromophore , side chain , azobenzene , polymer , macromolecule , monomer , materials science , chirality (physics) , polymer chemistry , photochemistry , amorphous solid , optically active , chemistry , crystallography , organic chemistry , physics , biochemistry , chiral symmetry breaking , quantum mechanics , nambu–jona lasinio model , quark
The photochromic and photoresponsive properties of a series of optically active azoaromatic polymers, containing in the side chain the rigid ( S )‐ and/or ( R )‐hydroxysuccinimide residue, have been investigated in solution and in the solid state as thin films by observing the trans ‐ cis photoisomerisation of the azobenzene chromophore, and the results are compared to the corresponding monomeric ( S ) and ( R ) model compounds. The presence of exciton splitting due to dipole‐dipole interactions between the trans ‐azoaromatic rings in the CD spectra confirms the intrinsic chirality of the macromolecules. Thin films of the polymers display the same chiroptical properties as the solution, thus suggesting that the macromolecules maintain chiral conformations also in the solid amorphous state.