TY - JOUR

T1 - Synthesis, Structure and Magnetic Properties of Low-Dimensional Copper(II) trans-1,4-cyclohexanedicarboxylate

AU - Demakov, Pavel A.

AU - Ovchinnikova, Anna A.

AU - Dorovatovskii, Pavel V.

AU - Lazarenko, Vladimir A.

AU - Lavrov, Alexander N.

AU - Dybtsev, Danil N.

AU - Fedin, Vladimir P.

N1 - The authors are grateful to the Ministry of Science and Higher Education of the Russian Federation for financial support (Agreement No. 075-15-2022-263), and for providing access to the large-scale research facility \u201CEXAFS spectroscopy beamline\u201D.

PY - 2024/6

Y1 - 2024/6

N2 - 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.

AB - 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.

KW - X-ray diffraction

KW - antiferromagnetism

KW - carboxylate

KW - coordination polymer

KW - copper(II) complex

KW - magnetization

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85196879007&origin=inward&txGid=70ebe73d21f5f21ad46d674696d46abc

UR - https://www.mendeley.com/catalogue/fe1fc1ef-08b9-3983-846a-6523d7263082/

U2 - 10.3390/cryst14060555

DO - 10.3390/cryst14060555

M3 - Article

VL - 14

JO - Crystals

JF - Crystals

SN - 2073-4352

IS - 6

M1 - 555

ER -