Photo-responsive behavior of a monolayer composed of an azobenzene containing polypeptide in the main chain

Autor:	N. Minoura, M. Higuchi, Takatoshi Kinoshita
Rok vydání:	1995
Předmět:	Azo compound Polymers and Plastics Chromophore Photochemistry Cis trans isomerization chemistry.chemical_compound Colloid and Surface Chemistry Azobenzene chemistry Chain (algebraic topology) Monolayer Materials Chemistry Molecule Moiety sense organs Physical and Theoretical Chemistry
Zdroj:	Colloid & Polymer Science. 273:1022-1027
ISSN:	1435-1536 0303-402X
DOI:	10.1007/bf00657668
Popis:	A photoresponsive polypeptide, two α-helical poly(γ-methyl L-glutamate)s joined with an azobenzene (MAzoM,Mn=11000), have been prepared. Monolayers of the polypeptide were formed at air-water interface and the photoresponsive behavior of the monolayer obtained was investigated. A trans to cis photo-isomerization of the azobenzene moiety in the main chain of MAzoM induced by UV light irradiation resulted in a bending structure formation in the main chain of the polypeptide via photo-induced changes in the geometry of the azobenzene chromophore. As a result, the limiting area per molecule of the MAzoM monolayer was decreased. Based on the degree of the decrease in the limiting area per molecule, it was estimated that the bending angle between the two α-helical rods of MAzoM molecule under UV light irradiation was ca. 140°. The photo-responsive behavior of the MAzoM monolayer was reversible and consisted along with the photo-isomerization of azobenzene moiety.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7f1986eacd428fefc6bb507b869646fb https://doi.org/10.1007/bf00657668 Zobrazit plný text záznamu Full text from SpringerLink