A Pair of 2D MOFs Based on [Tm2] Secondary Building Units: Syntheses, Structural Variation and Magnetic Properties

• Published in: Journal of cluster science Vol. 34; no. 4; pp. 1769 - 1776
• Main Authors: Pan, Huai-Dong, Wu, Cui-E., Chen, Jia-Hao, Li, Yan, Zhang, Xiu-Qing, Teng, Qing-Hu, Wang, Kai, Liang, Fu-Pei
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.07.2023; Springer Nature B.V
• Subjects: Antiferromagnetism; Catalysis; Chemistry; Chemistry and Materials Science; Geometry; Information storage; Inorganic Chemistry; Ligands; Magnetic permeability; Magnetic properties; Metal-organic frameworks; Nanochemistry; Original Paper; Physical Chemistry; Single crystals; Solvents; Coordinated solvents induced; Secondary building units; Tm MOFs; 2-Hydroxyisophthalic acid; Magnetic properties
• ISSN: 1040-7278; 1572-8862
• DOI: 10.1007/s10876-022-02347-x

A pair of 2D MOFs, [Tm 4 (ipO) 4 (H 2 O) 4 ] ( 1 ) and [Tm 2 (ipO) 2 (DMF)(H 2 O)] ( 2 ), have been solvothermally synthesized using 2-hydroxyisophthalic acid (H 3 ipO) ligand. Both of them are structurally characterized by single-crystal X-ray diffraction, IR, TGA and PXRD. They all consist of [Tm 2 ] Secondary Building Units (SBUs), in which two Tm III ions are double bridged by the O phenol from ipO 3− ligands. It is interesting that the tiny change of the reaction solvents has resulted in structural dissimilarity between them. Two types of centrosymmetric SBUs, namely, [Tm 2 (ipO) 2 ] and [Tm 2 (ipO) 2 (H 2 O) 2 ], are observed in 1 . While 2 is built by the SBUs of [Tm 2 (ipO) 2 (DMF)(H 2 O)], in which two Tm III centers show distinct coordination geometries. Furthermore, the difference in the linkages between the SBUs of two MOFs are also found, though two MOFs show rather similar 2D framework structures. The mesurements of variable temperature magnetic susceptibility revealed the occurrence of weak antiferromagnetic interaction between the Tm III centers in two systems. Graphical Abstract A pair of 2D Tm III MOFs based on [Tm 2 ] Secondary Building Units have been prepared with 2-hydroxyisophthalic acid ligand. Different coordinated solvents have induced the structural dissimilarity between two MOFs. Magnetic investigation indicated the antiferromagnetic interactions in both systems.