Atropenantiomers of novel 1,1′-binaphthyl derivatives: Synthesis and use for cholesteric structure induction in low molecular mass and polymer nematics

Kalinovskii, I.O.; Mastshenko, V.I.; Vinokur, R.A.; Boiko, N.I.; Shibaev, P.V.; Shibaev, V.P.

Авторы: Kalinovskii I.O., Mastshenko V.I., Vinokur R.A., Boiko N.I., Shibaev P.V., Shibaev V.P.
Сборник: Proceedings of SPIE - The International Society for Optical Engineering
Год издания: 1997
Первая страница: 113
Последняя страница: 116
DOI: 10.1117/12.301265
Аннотация: The synthetic pathways of preparation of new optically active 1,1′-binaphthyl (BN) derivatives containing various radicals including mesogenic ones were suggested and realized. (Most of them are reported for the first time). No mesophase was found, but having atropisomeric chirality origin the novel substances proved to be effective chiral dopants inducing the highly twisted supramolecular structure both in low molecular mass and in polymer liquid crystals (LC). The helical twisting power (HTP) in two different standard nematic mixtures (LC-1277, LC-1630, NIOPIC, Russia) and in the copolymers based on the nematogenic methoxy-phenyl benzoate acrylic monomer (AM-5) was investigated. The systematic growth of the HTP in the low molecular mass nematics (up to 90 μm-1) was found when the longer or mesogenic radicals were attached to the binaphthyl core. In the LC-copolymers the HTP of the BN-monomer and mesophase stability were analysed depending on temperature and the molar fraction of the BN-fragments. The observed HTP value was found to be about thrice as much as those reported for the cholesterol and binaphthyl (without the additional 2,2′ naphthalene interconnection) chiral monomers.
Добавил в систему: Шибаев Петр Валерьевич

	ИСТИНА	Войти в систему Регистрация
	ИПМех РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИПМех РАН

Atropenantiomers of novel 1,1′-binaphthyl derivatives: Synthesis and use for cholesteric structure induction in low molecular mass and polymer nematicsстатья