ENAMINOKETONE MESOGENS HAVING POLAR TERMINAL GROUPS

Authors
KROWCZYNSKI A PYZUK W GORECKA E SZYDLOWSKA J
Citation
A. Krowczynski et al., ENAMINOKETONE MESOGENS HAVING POLAR TERMINAL GROUPS, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 249, 1994, pp. 27-32
Citations number
11
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
249
Year of publication
1994
Pages
27 - 32
Database
ISI
SICI code
1058-725X(1994)249:<27:EMHPTG>2.0.ZU;2-1
Abstract
Homologous series of 4''-nitro- and 4''-cyano-derivatives of 1-(4'-alk oxyphenylamino)-3-phenyl-1-propen-3-ones and a structurally similar se ries of enylamino)-3-(4''-pyridyl-N-oxide)-1-propen-3-ones were synthe sized and studied by DSC and optical methods. The compounds behave typ ically for strongly polar mesogens: the smectic A(d) phase exists abov e a critical chain length and the reentrant nematic phase is observed in the vicinity of the critical double point. For pyridyl N-oxides, a second-order SmA(d) - SmCd phase transition line is observed.