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Statements

Subject Item
n2:RIV%2F60461373%3A22310%2F03%3A00008080%21RIV%2F2004%2FGA0%2F223104%2FN
rdf:type
skos:Concept n9:Vysledek
dcterms:description
Four series of new [1]benzothieno[3,2-b][1]benzothiophene derivatives have been synthesised. In the non-chiral series SmA phase occurs, while the chiral series exhibits rather wide antiferroelectric SmCA phase just below the SmA phase. The clearing pointis significantly increased when the carbonyl linkage group is used between the heterocyclic core and the alkyl chain. The SmA - SmCA phase transition is studied by DSC and by dielectric spectroscopy, which yields the type of the transition. In the SmCA phase the spontaneous quantities have been measured. The tilt angle shows typical temperature dependence for the phase transition parameter, the values of spontaneous polarisation are rather moderate. The length of the helical pitch increases with increasing length of the non-chiral alkyl chain. Four series of new [1]benzothieno[3,2-b][1]benzothiophene derivatives have been synthesised. In the non-chiral series SmA phase occurs, while the chiral series exhibits rather wide antiferroelectric SmCA phase just below the SmA phase. The clearing pointis significantly increased when the carbonyl linkage group is used between the heterocyclic core and the alkyl chain. The SmA - SmCA phase transition is studied by DSC and by dielectric spectroscopy, which yields the type of the transition. In the SmCA phase the spontaneous quantities have been measured. The tilt angle shows typical temperature dependence for the phase transition parameter, the values of spontaneous polarisation are rather moderate. The length of the helical pitch increases with increasing length of the non-chiral alkyl chain.
dcterms:title
Novel liquid crystals based on [1]benzothieno[3,2 b][1]benzothiophene Novel liquid crystals based on [1]benzothieno[3,2 b][1]benzothiophene
skos:prefLabel
Novel liquid crystals based on [1]benzothieno[3,2 b][1]benzothiophene Novel liquid crystals based on [1]benzothieno[3,2 b][1]benzothiophene
skos:notation
RIV/60461373:22310/03:00008080!RIV/2004/GA0/223104/N
n3:strany
603-610
n3:aktivita
n10:P
n3:aktivity
P(GA106/00/0580), P(GA202/02/0840)
n3:cisloPeriodika
3
n3:dodaniDat
n7:2004
n3:domaciTvurceVysledku
n12:8108064 n12:9090878 n12:9750940
n3:druhVysledku
n15:J
n3:duvernostUdaju
n4:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
618430
n3:idVysledku
RIV/60461373:22310/03:00008080
n3:jazykVysledku
n18:eng
n3:klicovaSlova
antiferroelectric liquid crystals, synthesis, mesomorphic behaviour
n3:klicoveSlovo
n11:synthesis n11:antiferroelectric%20liquid%20crystals n11:mesomorphic%20behaviour
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[A4037FBBE064]
n3:nazevZdroje
Liq.Cryst.
n3:obor
n16:CC
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
6
n3:pocetUcastnikuAkce
0
n3:pocetZahranicnichUcastnikuAkce
0
n3:projekt
n6:GA202%2F02%2F0840 n6:GA106%2F00%2F0580
n3:rokUplatneniVysledku
n7:2003
n3:svazekPeriodika
30
n3:tvurceVysledku
Novotná, Vladimíra Svoboda, Jiří Kozmík, Václav Glogarová, Milada Vaněk, Přemysl Košata, Bedřich
s:issn
0267-8292
s:numberOfPages
8
n8:organizacniJednotka
22310