Synthesis of Liquid crystals with terminal polar groups and study their mesomorphic and spectroscopic properties
DOI:
https://doi.org/10.60037/edu.v1i9.1213Keywords:
Schiffs bases, aniline moiety, complex, spectroscopic parametersAbstract
Synthesis new Schiffs bases substituted with polar groups CI . Br , F , N02, CH3 , OCH3 , COCH3 in para position or aniline moiety, and derived Cu ( II ) complex from the Schiff base which substituted with COCH3. The Schiffs bases substituent with CH3 , OCH3 exhibited Nematic phase but the other Schiff bases and Cu ( II ) complex exhibited Smectic phase ( Sc ) only. Molecular complexes of Cu (II) complex
with various nitrogen bases were studied spectrophotometrically in benzene solvent at
different temperatures. These entire complex show a new broad charge transfer band in the visible region of the electromagnetic spectrum.
All the donors are known to form I: I complex with the acceptor and their
stoichiometry was unaffected by the variation of temperature over a small interval. The thermodynamic and spectroscopic parameters were evaluated. The order of donor strength followed the sequence:
Butyl amine> 4 - methyl pyridine > N,N –
dimethyl aniline.
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