Self-assembly of Tb(III) coordination polymer from imidazole-dicarboxylate ligand accompanied by in situ ligand formation

Abstract

A new metal-organic framework, {[Tb(O-IDC)(O-HIDC)] (H₂O)}_n(1), (O-H₃IDC = 2-(pyridine-N-oxide-2-yl)-1H-imidazole-4,5-dicarboxylic acid) has been constructed through hydrothermal reaction using 2-(pyridine-2-yl)-1H-imidazole-4,5-dicarboxylate(H₂IDC) and Tb(NO₃)₃•6H₂O. During the reaction, O-H₂IDC resulted from the in situ oxidation reaction of H₂IDC. The compound 1 has been characterized by elemental analysis, IR spectra, the Powder Diffraction and single-crystal X-ray diffraction. Compound 1 crystallizes in monoclinic space group P2₁/c with a = 15.116(3), b = 10.641(2), c = 13.398(3) Å, β = 92.057(4) °, V = 2153.8(8) ų, Dc = 2.073 g/cm³, Mr = 672.28, F(000) = 1312, Z = 4, R = 0.0373 and wR = 0.0964. Compound 1 displays an infinite 1 D chain structure. Moreover, through intermolecular hydrogen bonds, these 1 D chains extend into a 3 D supramolecular framework. Furthermore, the solid-state luminescent properties have also been investigated. (CCDC 1856803)

Keywords:

• crtstal structure
• imidazole-dicarboxylate acid
• in situ reaction
• luminescence

Additional information

Funding

This work was supported by the Training Program of FuJian Excellent Talents in University under Grant [2018]; Young and Middle-age academic leader plan of Quanzhou in University; National University Student Innovation Entrepreneurship Project under Grant [201912992201]; the undergraduate education teaching reform in Fujian province under Grant [FBJG20170260].