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Photochromic and Photoresponsive Properties of Methacrylic Polymers Bearing Optically Active Hydroxysuccinimide in the Side Chain

✍ Scribed by Luigi Angiolini; Tiziana Benelli; Loris Giorgini

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
253 KB
Volume
208
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

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.

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