Synthesis and characterization of a novel liquid crystalline side chain metallopolymer

Abstract

SUMMARY The synthesis of a novel kind of form-retaining liquid crystalline crosslinked metallopolymer is reported. Copper(I1) is complexed by Schiffs base units as part of a mesogenic side chain polymer. This leads to remarkable antiferromagnetic exchange interactions between the copper centers that are not present in related monomeric model compounds. IR spectroscopic investigations in the region 4 000-200 cm-', X-ray diffractometry and temperature dependent magnetic susceptibility measurements were carried out to elucidate the structure of this new material. The observed considerably strong antiferromagnetic coupling is assumed to be due to the interactions between the copper centers through oxygen bridges in the polymeric matrix.

Metallopolymers with Schiff Base Side Chains. Synthesis and Characterization of Some Nickel(II) Containing Polymers with Unexpected Cooperative Magnetic Properties

“…[9,17] The same composition could be expected for the nickel(II) polymers. Elemental analyses clearly indicate that this is not the case, the content of carbon, hydrogen and nitrogen is in all cases lower than expected.…”

Rational Design of Coordination Polymers with Flexible Oxyethylene Side Chains

“…10,11 On the other hand, linear one-dimensional (1D) coordination polymers are often soluble in solvent or fusible and they therefore are solution-or melt-processable, like conventional organic polymers without cross-linking. [1][2][3]10,11 In solvothermal reactions with identical metal salts and binding parts in the organic molecules, the resulting coordination polymers often exhibit different coordination characteristics, including either 1D or 3D coordination, and these characteristics strongly depend on the side chains of the organic linkers.…”