SPIROPYRAN-CONTAINING POLY(L-GLUTAMIC ACID) - PHOTOCHROMIC AND CONFORMATIONAL BEHAVIOR IN ACID CONDITIONS

Authors
PIERONI O FISSI A CIARDELLI F FABBRI D
Citation
O. Pieroni et al., SPIROPYRAN-CONTAINING POLY(L-GLUTAMIC ACID) - PHOTOCHROMIC AND CONFORMATIONAL BEHAVIOR IN ACID CONDITIONS, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 246, 1994, pp. 191-194
Citations number
5
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
246
Year of publication
1994
Pages
191 - 194
Database
ISI
SICI code
1058-725X(1994)246:<191:SPA-PA>2.0.ZU;2-O
Abstract
Poly(L-glutamic acid) containing spiropyran groups in the side chains was found to exhibit reverse photochromism in hexafluoro-2-propanol in the presence of trifluoroacetic acid, but the polypeptide conformatio n was not affected by the photoisomerization of the photochromic units . When appropriate amounts of methanol were added as a cosolvent, the system responded to light giving reversible coil --> alpha-helix trans itions whose extent depended on methanol concentration.