Supramolecular aggregates in fluid phases:: Mesomorphic ortho-palladated complexes with substituted crown ethers and their potassium adducts

被引：20

作者：

Coco, Silverio ^{[1
]}

Cordovilla, Carlos ^{[1
]}

Espinet, Pablo ^{[1
]}

Gallani, Jean-Louis ^{[2
]}

Guillon, Daniel ^{[2
]}

Donnio, Bertrand ^{[2
]}

机构：

[1] Univ Valladolid, Fac Ciencias, E-47005 Valladolid, Spain

[2] ULP, CNRS, UMR 7504, Inst Phys & Chim Mat Strasbourg, F-67034 Strasbourg 2, France

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2008年 / 08期

关键词：

crown ethers; palladium; liquid crystals; langmuir films;

D O I：

10.1002/ejic.200700786

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

New imines (HL) containing substituted dibenzo-18-crown-6-ethers and their dinuclear ortho-palladated complexes, [Pd(mu-X)L](2) (X- = CH3COO-, Cl-), have been prepared. The free imine ligands are not liquid crystals, but the palladium complexes, including acetato-bridged derivatives, show liquid-crystal properties. The mesomorphic palladium complexes bear six or eight alkoxy chains. Although a columnar arrangement of these chains might be expected, a smectic arrangement is in fact preferred for half of the metallomesogens prepared, which show a smectic C mesophase. Complexation with potassium produces a significant increase in the mesophase range and stability. Moreover, both the free imines and the corresponding liquid-crystalline ortho-palladated complexes form stable Langmuir films at the air-water interface. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany 2008).

引用

页码：1210 / 1218

页数：9

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[1] Palladium(II) metallomesogens of crown ether derivatized imines, and their sodium adducts [J].