Columnar mesomorphism in hexacatenar tetrahedral (2,2'-bipyridine)zinc complexes and homologous palladium derivatives

被引：47

作者：

Barberio, G ^{[1
]}

Bellusci, A ^{[1
]}

Crispini, A ^{[1
]}

Ghedini, M ^{[1
]}

Golemme, A ^{[1
]}

Prus, P ^{[1
]}

Pucci, D ^{[1
]}

机构：

[1] Univ Calabria, LASCAMM, Unita INSTM Calabria, Dipartimento Chim, I-87030 Arcavacata Di Rende, CS, Italy

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2005年 / 01期

关键词：

bipyridine ligands; zinc; palladium; metallomesogens; columnar structures;

D O I：

10.1002/ejic.200400528

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The synthesis and characterisation of novel liquid crystals which display columnar mesomorphism induced upon complexation of a series of nonmesomorphic hexacatenar 4,4'-disubstituted 2,2'-bipyridines (L-n) are reported. The introduction of different metal centres (Zn, Pd) causes the appearance of mesomorphism in all complexes regardless of the geometry around the metal ion. We therefore report the first examples of mesomorphism in tetrahedral zinc derivatives. The nature of the columnar phases is related to the self-assembly of the half-disc shaped [(LMCl2)-M-n] (M = Zn, Pd) complexes into full disc-shaped supramolecules. The molecular organisation in the mesophase is mainly driven by intermolecular attractive interactions, as shown by the crystal structure of the model compound [LPdCl2]. Preliminary measurements of photoconductivity have been performed on samples of [(LMCl2)-M-n] complexes doped with C-60 to increase absorption. Promising results were obtained. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005).

引用

页码：181 / 188

页数：8

共 35 条

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