About: Synthesis and mesomorphic properties of new compounds exhibiting TGBA and TGBC liquid crystalline phases

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About: Synthesis and mesomorphic properties of new compounds exhibiting TGBA and TGBC liquid crystalline phases Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We synthesized a series of rod-like mesogens with a (S)-2-methylbutyl-(S)-lactate unit in the chiral chain that exhibited extremely wide temperature ranges in the TGBA and TGBC* phases. TGB phases were identified, based on typical textures in confined samples and in free-standing films, by Grandjean-Cano texture and by NMR studies on a deuterium-labelled isotopomer. Temperature dependencies of relaxation frequency, dielectric strength, selective reflection and layer spacing showed anomalies at a certain temperature within the TGBC* phase range. Also, changes in textures, as well as in 2H NMR spectra, occurred at this same temperature. These results suggest the existence of two TGBC* phases. We synthesized a series of rod-like mesogens with a (S)-2-methylbutyl-(S)-lactate unit in the chiral chain that exhibited extremely wide temperature ranges in the TGBA and TGBC* phases. TGB phases were identified, based on typical textures in confined samples and in free-standing films, by Grandjean-Cano texture and by NMR studies on a deuterium-labelled isotopomer. Temperature dependencies of relaxation frequency, dielectric strength, selective reflection and layer spacing showed anomalies at a certain temperature within the TGBC* phase range. Also, changes in textures, as well as in 2H NMR spectra, occurred at this same temperature. These results suggest the existence of two TGBC* phases. (en) Syntetizovali jsme sérii mesogenů s protáhlým tvarem molekul s (S)-2-metylbutyl-(S)-laktátem v chirální části molekuly. Studovali jsme mezomorfní chování těchto látek a zjistili přítomnost TGB fází v extrémně širokém teplotním oboru. TGB fáze byly identifikovány na základě studia optických textur v polarizačním mikroskopu a NMR spektroskopie na izomeru obohaceném deuteriem. (cs)
Title	Synthesis and mesomorphic properties of new compounds exhibiting TGBA and TGBC liquid crystalline phases Synthesis and mesomorphic properties of new compounds exhibiting TGBA and TGBC liquid crystalline phases (en) Syntéza a mezomorfní vlastnosti nových sloučenin s TGB kapalně-krystalickými fázemi (cs)
skos:prefLabel	Synthesis and mesomorphic properties of new compounds exhibiting TGBA and TGBC liquid crystalline phases Synthesis and mesomorphic properties of new compounds exhibiting TGBA and TGBC liquid crystalline phases (en) Syntéza a mezomorfní vlastnosti nových sloučenin s TGB kapalně-krystalickými fázemi (cs)
skos:notation	RIV/68378271:_____/08:00308592!RIV08-AV0-68378271
http://linked.open.../vavai/riv/strany	287;298
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA202/05/0431), P(IAA100100710), P(OC 175), Z(AV0Z10100520)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Kašpar, Miroslav Glogarová, Milada Novotná, Vladimíra Hamplová, Věra Bílková, Petra
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	398740
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/08:00308592
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	liquid crystals; TGB phases (en)
http://linked.open.../riv/klicoveSlovo	liquid crystals TGB phases
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[24672DBC23A8]
http://linked.open...i/riv/nazevZdroje	Liquid Crystals
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20175 Polar order in new liquid crystalline materials New liquid crystals with phases switchable by the electric field.
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	35
http://linked.open...iv/tvurceVysledku	Glogarová, Milada Hamplová, Věra Kašpar, Miroslav Novotná, Vladimíra Pociecha, D. Bílková, Petra Domenici, V.
http://linked.open...n/vavai/riv/zamer	Specific effects in condensed systems with reduced dimension and broken symmetry
issn	0267-8292
number of pages	12 (xsd:int)

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