Liquid Crystalline Cyclotetraphosphazene

Year 2018, , 157 - 161, 30.06.2018

Derya Davarcı , Ceylan Mutlu Balcı

https://doi.org/10.18466/cbayarfbe.350047

Abstract

Full substituted dodecyloxy derivative of
cyclotetraphosphazene was synthesized in order to investigate its mesomorphic
properties. Octachlorocyclotetraphosphazene (tetramer) was reacted with
dodecanol in tetrahydrofuran (THF) presence of sodium hydride (NaH) as base at
room temperature for 24 hours and then under the reflux for a day. Full
substituted derivative (1) was
obtained and its structure was determined by mass analysis, and by FT–IR, ¹H
and ³¹P {¹H} NMR spectroscopic techniques. Additionally,
thermal and mesomorphic behaviours were examined by differential scanning
calorimetry (DSC), polarizing optical microscopy (POM) and X-ray diffraction
(XRD) techniques. Obtained results showed that compound 1 has liquid crystal behaviour.

Keywords

Cyclotetraphosphazene; Liquid crystal; Differential scanning calorimeter; Polarising optical microscopy; X-ray Diffraction

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