Thermotropic Approach from {Mn4} Cluster to One-Dimensional Coordination Polymer: Structure Conversion and Enhanced Magnetocaloric Effect

Monitoring the assembly process of coordination polymers (CPs) is crucial for elucidating the assembly mechanism and developing new CPs with well-defined structures and functions. In this paper, a one-dimensional coordination polymer of {Mn2-1D} have been constructed from discrete {Mn4} clusters, along with thermal dehydration. The thermotropic dimension augmentation process was monitored via single crystal/powder X-ray diffraction (SC/P-XRD), infrared spectroscopy and Raman spectroscopy. Additionally the enhanced magneto-thermal properties of CPs were investigated. During the dimension augmentation, the magnetic entropy change values increased from 26.92 J K–1kg–1 in {Mn4} to 36.78 J K–1kg–1 in {Mn2-1D} (T = 2 K, ΔH = 7 T).