4.5 Article

Low temperature heat capacity, thermodynamic and magnetic property of several new dinuclear complexes

Journal

JOURNAL OF CHEMICAL THERMODYNAMICS
Volume 170, Issue -, Pages -

Publisher

ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2022.106785

Keywords

Dinuclear complexes; Heat capacity; Schottky anomaly; Magnetic property; Crystal structure

Funding

  1. National Natural Science Foundation of China [21701167, 22003065]
  2. Liaoning Provincial Nat-ural Science Foundation of China [2019-MS-318]
  3. Dalian Outstanding Young Scientific Talent Program [2019RJ10]

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This study reports the design, synthesis, structure, and property of four complexes. The magnetic property characterization reveals the presence of antiferromagnetic interactions in three of the complexes, which exhibit Schottky anomalies at low temperature. The thermodynamic functions and the responses of heat capacity to the magnetic field have been determined.
We report the design, synthesis, structure and property of four complexes formulated as {[M-2(4-C(3)trz)3(H2O)6]. (H2BTTC)(2)}n. Single-crystal X-ray diffraction reveals that the space group of these complexes is orthorhombic, Pnma. The magnetic property characterization reveals that antiferromagnetic interactions dominate in complexes 1, 2 and 3. Correspondingly, complexes 1, 2 and 3 exhibit Schottky anomalies at low temperature, according to the heat capacity measurement (1.9 ~ 300 K) of these four complexes. Furthermore, the thermodynamic functions and the responses of heat capacity to the magnetic field have been determined. These results may provide the important thermodynamic basis for understanding the magnetic and structural properties of these molecular-based magnetic materials.

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