Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Opto-Electronics Review

2 2009

Powiadomienia systemowe

Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: fluorine substitution

Sortuj według:

Ogranicz wyniki do:

Syntheses and mesomorphic properties of laterally fluorinatedphenyl isothiocyanatotolanes and their high birefringent mixtures

Dziaduszek J., Dąbrowski R., Ziółek A., Gauza S., Wu S. T.

Opto-Electronics Review

2009

Vol. 17, No. 1

20-24

Syntheses and mesomorphic properties of di-, tri- and tetrafluorosubstituted 4'-(4-alkylphenyl)-4-isothiocyanatotolanes are described. Four fluorine substituted compounds in the position 2', 3', 3, and 5 show stronger nematic character than difluorosubstituted ones in the position 3, 5 or 2', 3'. Example of high birefringence nematic mixture and its properties are given.

Effect of fluorination of molecular rigid core in liquid crystal biphenyl benzoate based homologous series

Morawiak P., Piecek W., Żurowska M., Perkowski P., Raszewski Z., Dąbrowski R., Czupryński K., Sun X. W.

Opto-Electronics Review

2009

Vol. 17, No. 1

40-44

Liquid crystalline perfluorinated biphenyl benzoates were synthesized and investigated. A highly tilted, neat orthoconic smectic antiferroelectric phase was observed. A homologous series of compounds without and with a single fluorine atom substituted at different positions of a molecular rigid core was investigated by standard methods. Influence of fluorine substitution on physical properties of antiferroelectric smectic phase was discussed as well as influence of fluorination on molecular dipole moment orientation and its value were presented. Decrease in rotational viscosity as a result of fluorine substitution within a molecular rigid core was ascribed to changes of molecular packing.