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Liquid Crystals of 2,4-Substituted-1,3-Thiazole Derivatives

  • Kartonierter Einband
  • 180 Seiten
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A new compounds of 2,4-substituted-1,3- thiazole containing amines [I] and [II], Schiff bases [IV] and [V], amides [VI]-[X],esters... Weiterlesen
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Beschreibung

A new compounds of 2,4-substituted-1,3- thiazole containing amines [I] and [II], Schiff bases [IV] and [V], amides [VI]-[X],esters [XI] - [XIII], thiazolidinones [XIV]-[XVIII] and 1,3-oxazepines [XIX]-[XXV] were Synthesized and characterized by melting points, FTIR spectroscopy, elemental analysis, 1HNMR,13CNMR, dept135and Mass spectroscopy. The liquid crystalline properties of the synthesized compounds were verified by using hot-stage polarizing optical microscopy (POM) and differential scanning calorimeter (DSC). The compound [I] was found to be nematic textures (N). The first series of this study [II]n display only enantiotropic nematic phase when n=1-5 while the compounds with n =6-8 display two mesophasese smectic C(SmC) and nematic phases(N). All compounds of series [IV]n were found to be enantiotropic nematic phase. Compounds[VI]a and[VI]b showed both semctic and nematic phases. Compounds [XI]a, b and [XIII]a, b showed only nematic texture but the compounds [XI]c and [XIII]c did not show any liquid crystalline properties. All compounds of series [XVII]n with n=1,3-7 display only nematic texture but compound with n=8 showed semactic C phase (SmC) in addition of ne

Autorentext

Nisreen H. Karam, Ph.D, M.Sc. and B.Sc. from University of Baghdad, Iraq. She is currently Assistant Professor of organic Chemistry at Baghdad University, Baghdad, Iraq.

Produktinformationen

Titel: Liquid Crystals of 2,4-Substituted-1,3-Thiazole Derivatives
Untertitel: Synthesis, Characterization and Liquid Crystalline Properties of Some 2,4-Substituted-1,3-Thiazole Derivatives
Autor:
EAN: 9783639662986
ISBN: 3639662989
Format: Kartonierter Einband
Genre: Chemie
Anzahl Seiten: 180
Gewicht: 284g
Größe: H220mm x B150mm x T11mm
Jahr: 2014
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