Architectonic and Desolvation Activation Energies of Five New Mixed-Ligand Copper(II) Coordination Polymers of 5-Sulfoisophthalate and 1,3-Bis(1H-imidazol-1-yl)propane or 1,4-Bis(1H-imidazol-1-yl)butane

IF 3.2 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Crystal Growth & Design Pub Date : 2025-02-18 DOI:10.1021/acs.cgd.4c0167110.1021/acs.cgd.4c01671

Valoise Brenda Nguepmeni Eloundou, Patrice Kenfack Tsobnang*, Theophile Kamgaing and Susan A. Bourne*,

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引用次数: 0

Abstract

Five new coordination polymers, [Cu₃(imp)₄(sip)₂]•2H₂O (1), {[Cu₃(imp)₆(H₂O)_2.5](sip)₂}•15H₂O (2), [Cu₂(imp)(sip)(OH)(CH₃OH)]•CH₃OH (3), {[Cu₃(timp)₆(H₂O)₄](sip)₂}•15H₂O (4), and [Cu₃ (timp)₃(sip)₂(H₂O)₂]•4H₂O (5) were synthesized via solvothermal reactions using copper(II) and mixed ligands, including 5-sulfoisophthalate ions, (sip) 1,3-bis(1H-imidazol-1-yl)propane (imp), and 1,4-bis(1H-imidazol-1-yl)butane (timp). Characterization techniques, including FT-IR spectroscopy, thermal analysis, and single-crystal X-ray diffraction, confirmed the successful formation of these polymers. Single-crystal X-ray diffraction revealed that compounds 1, 4, and 5 crystallize in space group $P \bar{1}$ , while 2 and 3 crystallize in P2₁/c and Pnnm, respectively. All of the coordination polymers include multiple copper ions with different coordination geometries. In compounds 1, 2, 3, and 4, the copper(II) ions have octahedral and trigonal bipyramidal geometries, whereas 5 contains copper(II) ions with square pyramidal and square planar geometries. The thermal behavior of all compounds was investigated under a nitrogen atmosphere. Decomposition occurs within the 150–300 °C range, beginning with desolvation. The activation energies for this process were measured, ranging from 32 to 89 kJ mol–¹, providing valuable insights into the compounds’ thermal properties. Notably, desolvation studies indicated similar thermal properties for 1, 3, and 5, which exhibit single-step desolvation, while 2 and 4 dehydrate in two distinct steps.

The ability of 5-sulfoisophthalic acid and bisimidazole derivatives to build 2D- and 3D-mixed ligand coordination polymers is shown in this work. The five compounds reported are obtained from the same reagents but different solvents.Thermal analysis and desolvation kinetic studies of the five compounds show their promising application in dehumidification.

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来源期刊

Crystal Growth & Design 化学-材料科学：综合

CiteScore

6.30

自引率

10.50%

发文量

650

审稿时长

1.9 months

期刊介绍： The aim of Crystal Growth & Design is to stimulate crossfertilization of knowledge among scientists and engineers working in the fields of crystal growth, crystal engineering, and the industrial application of crystalline materials. Crystal Growth & Design publishes theoretical and experimental studies of the physical, chemical, and biological phenomena and processes related to the design, growth, and application of crystalline materials. Synergistic approaches originating from different disciplines and technologies and integrating the fields of crystal growth, crystal engineering, intermolecular interactions, and industrial application are encouraged.