Paramagnetic bimetallomesogens

被引：26

作者：

Barberá, J ^{[1
]}

Giménez, R ^{[1
]}

Marcos, M ^{[1
]}

Serrano, JL ^{[1
]}

Alonso, PJ ^{[1
]}

Martínez, JI ^{[1
]}

机构：

[1] Univ Zaragoza, Fac Ciencias, Inst Ciencia Mat Aragon, Zaragoza 50009, Spain

来源：

CHEMISTRY OF MATERIALS | 2003年 / 15卷 / 04期

关键词：

D O I：

10.1021/cm0209721

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The synthesis, characterization, and mesomorphic properties of copper(II) and vanadyl-(IV) complexes derived from mono-, di-, or tridecyloxy-4-benzoyloxysalicylidene-3,3'-diaminobenzidine are reported. These bimetallic complexes and the respective ligands exhibit columnar hexagonal mesomorphism when they possess 8 or 12 terminal chains and smectic C mesomorphism is displayed for compounds with 4 terminal chains, as was determined by means of optical microscopic and X-ray analysis. The complexes were paramagnetic and they were studied by EPR. The differences in molecular packing between calamitic and columnar complexes are shown clearly from comparison of the measured EPR spectra. The thermal evolution of a parameter that reflects the order of the molecules within each column of the mesophase for a columnar vanadyl complex was obtained.

引用

页码：958 / 964

页数：7

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