The effect of the alkyl chain length on the mesomorphic properties of new lactic acid derivatives
Result description
New series of lactic acid derivatives with alkyl terminal chain have been synthesised and their mesomorphic properties studied. We have varied the length of chiral and non-chiral terminal alkyl chains and found that prolonging both chains has a strong effect on the SmA*?SmC* phase transition. Most of the new materials exhibit only paraelectric SmA* phase; for homologues with a longer non-chiral chain (m 10), the ferroelectric (SmC*) phase appears below the SmA* on cooling and persists down to a room temperature. The role of the chiral terminal chain in the molecule is quite opposite ? only its short length supports the existence of ferroelectric phase. Additionally, a hexatic phase appeared below the SmA*?SmC* phase sequence for several homologues at low temperatures. Liquid crystalline properties of new materials have been compared with the previously prepared and studied lactic acid derivatives.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
The effect of the alkyl chain length on the mesomorphic properties of new lactic acid derivatives
Original language description
New series of lactic acid derivatives with alkyl terminal chain have been synthesised and their mesomorphic properties studied. We have varied the length of chiral and non-chiral terminal alkyl chains and found that prolonging both chains has a strong effect on the SmA*?SmC* phase transition. Most of the new materials exhibit only paraelectric SmA* phase; for homologues with a longer non-chiral chain (m 10), the ferroelectric (SmC*) phase appears below the SmA* on cooling and persists down to a room temperature. The role of the chiral terminal chain in the molecule is quite opposite ? only its short length supports the existence of ferroelectric phase. Additionally, a hexatic phase appeared below the SmA*?SmC* phase sequence for several homologues at low temperatures. Liquid crystalline properties of new materials have been compared with the previously prepared and studied lactic acid derivatives.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JJ - Other materials
OECD FORD branch
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Result continuities
Project
GA13-14133S: Challenging functional materials with nano-scale polar order
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Liquid Crystals
ISSN
0267-8292
e-ISSN
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Volume of the periodical
41
Issue of the periodical within the volume
8
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
1179-1187
UT code for WoS article
000337159900013
EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
JJ - Other materials
Year of implementation
2014