Chiroptical Properties of Cholesteric Liquid Crystals Induced by Chiral Photochromic 3,3′-Dialkoxyazobenzenes

Autor:	Kunihiro Ichimura, Shin'ya Morino, Masaru Nakagawa, Christian Ruslim
Rok vydání:	2001
Předmět:	Quantitative Biology::Biomolecules Azo compound Photoisomerization Absorption spectroscopy Dopant Chemistry Condensed Matter Physics Photochemistry Condensed Matter::Soft Condensed Matter chemistry.chemical_compound Photochromism Liquid crystal Chirality (chemistry) Isomerization
Zdroj:	Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 365:55-62
ISSN:	1058-725X
DOI:	10.1080/10587250108025281
Popis:	The spectroscopic features and photoisomerization behaviors of chiral photochromic 3,3′-dialkoxyazobenzenes were evaluated in an isotropic solution and a nematic solvent. The effect of photoisomerization on the helical twisting power and handedness of these chiral dopants in induced cholesteric liquid crystals were studied. Depending on the distance of the chiral center from the azo-core, elongation of the helical pitch and reversion of the handedness upon E-to-Z photoisomerization were observed. These characteristics are interesting for optical devices based on light-controlled phase switching.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e3716d77c37856c7d9c4208882bb901f https://doi.org/10.1080/10587250108025281 Zobrazit plný text záznamu