Formation of columnar arrangements in copper(II) complexes of 2-phenylazomethinopyridine derivatives

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題名:	Formation of columnar arrangements in copper(II) complexes of 2-phenylazomethinopyridine derivatives
作者:	Lai,CK;Wang,KW;Lin,R
貢獻者:	中央大學
關鍵詞:	LIQUID-CRYSTALS;TRANSITION-METALS;DISCOTIC BIMETALLOMESOGENS;METALLOMESOGENS;MESOPHASES;PHASES;OXOVANADIUM(IV);VANADYL;SHAPES;ORDER
日期:	1998
上傳時間:	2010-06-29 19:47:31 (UTC+8)
出版者:	化學研究所
摘要:	The synthesis and mesomorphic properties of a homologous series of 2-(3',4',5 '-trialkoxyphenyl)-azomethinopyridines and their copper(II) complexes are reported. Liquid crystalline properties of the copper(II) complexes were studied by DSC analysis and polarized optical microscopy. The results indicated that copper complexes with six sidechains (3) exhibited columnar phases, whereas copper(Ir) complexes with two or four sidechains (1 and 2) formed only crystalline phases. The structures of the mesophases for copper(II) complexes 3 were characterized and confirmed as disordered hexagonal columnar phases (Col,,) by powder X-ray diffraction. Relatively high clearing points and the short range of mesophase temperature for the copper complexes were attributed to a relatively strong interaction of pyridyl core-core groups within the columns. The EPR spectra measured at various temperatures were also examined.
關聯:	JOURNAL OF MATERIALS CHEMISTRY
顯示於類別:	[化學研究所] 期刊論文

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