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Structural characterization, thermal investigation and liquid crystalline behavior of 4-[(4-chlorobenzyl)oxy]-3,4′-dichloroazobenzene

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Anca Moanţã, Catalina Ionescu, Petre Rotaru, Margareta Socaciu, Ana Hãrãbor

Editorial: Journal of Thermal Analysis and Calorimetry, 102 (3), p.1079-1086, 2010.

Rezumat:

Using the Williamson method, a new dye
4-[(4-chlorobenzyl)oxy]-3,40-dichloroazobenzene (CODA)
with liquid crystalline properties was synthesized. The
structure and the thermal behavior of CODA were investigated
by means of nuclear magnetic resonance, X-ray
diffraction, differential scanning calorimetry, and light
polarized optical microscopy techniques. The thermophysical
processes were monitored by heating-cooling cycles,
but the formation of liquid crystal phases were exhibited
only for small values of the cooling rates. For the first
heating-cooling cycle, the melting and the solidification
processes, thus the characteristic temperatures, are shifted
to higher values when compared to the following cycles.

Cuvinte cheie: Azomonoethers, DSC, NMR, LPOM