Synthesis, Structure and Magnetic Properties of Low-Dimensional Copper(II) trans-1,4-cyclohexanedicarboxylate

Author:

Demakov Pavel A.1ORCID,Ovchinnikova Anna A.12,Dorovatovskii Pavel V.3,Lazarenko Vladimir A.3ORCID,Lavrov Alexander N.1,Dybtsev Danil N.1ORCID,Fedin Vladimir P.1ORCID

Affiliation:

1. Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia

2. Department of Natural Sciences, Novosibirsk State University, 630090 Novosibirsk, Russia

3. National Research Centre “Kurchatov Institute”, 123182 Moscow, Russia

Abstract

A reaction between copper(II) nitrate and trans-1,4-cyclohexanedicarboxylic acid (H2chdc) carried out under hydrothermal conditions led to a new metal-organic coordination polymer [Cu2(Hchdc)2(chdc)]n. According to single-crystal XRD data, the compound is based on bi-nuclear paddlewheel-type carboxylate blocks that are joined with polymeric chains due to the (μ3-κ1:κ2) coordination of carboxylate groups. The chains are interconnected by chdc2− bridging ligands into layers containing free COOH groups of terminal Hchdc−. The neighboring layers adopt a RCOOH···OOCR hydrogen bond-assisted arrangement into a dense-packed structure. Magnetization measurements showed the presence of a strong antiferromagnetic exchange interaction (J/kB = −495 K) inside the bi-nuclear blocks. At the same time, no significant interaction was found between the {-Cu2(OOCR)4-} units in spite of their polymeric in-chain packing. Patterns of magnetic behavior of [Cu2(Hchdc)2(chdc)]n were thoroughly analyzed and explained from a structural point of view.

Funder

Ministry of Science and Higher Education of the Russian Federation

Publisher

MDPI AG

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