Abstract
A new compound, namely, [Zn(L)2]n (1) was obtained by the reaction of 2-methyl-4-(4H-1,2,4-triazol-4-yl) benzoic acid (HL) with ZnSO4·7H2O, and the compound was characterized by single-crystal X-ray diffraction, infrared spectroscopy, elemental analysis, powder X-ray diffraction (PXRD), and thermogravimetric analysis. The linear HL ligands were deprotonated to be L− anions and act as two-connectors to link Zn2+ to form a two-dimensional (2D) lay structure with (4, 4) topology. The large vacancy of 2D framework allows another layer structure to interpenetrate, resulting in the formation of 2D + 2D → 2D parallel interpenetration in 1. The weak interactions, such as hydrogen bonding and π–π stacking interactions, connect the adjacent 2D layers into a three-dimensional (3D) coordination polymer. The solid-state UV-visible spectroscopy and luminescent property have also been studied.
Highlights
In recent years, coordination polymers (CPs) built from metal ions and organic ligands have become a hot research topic because of their fascinating architectures and potent applications in the fields of luminescence [1,2,3,4,5], chemical sensors [6], gas adsorption or selective gas adsorption, gas separation [7,8], and heterogeneous catalysis [9]
We adopted the hydro/solvothermal reaction, because it is an effective method in construction of CPs, especially for the carboxylic acid ligands
The reaction of metal atoms with carboxylate ligands leads to the formation of precipitate, making it difficult to grow suitable single crystals for X-ray diffraction studies
Summary
Coordination polymers (CPs) built from metal ions and organic ligands have become a hot research topic because of their fascinating architectures and potent applications in the fields of luminescence [1,2,3,4,5], chemical sensors [6], gas adsorption or selective gas adsorption, gas separation [7,8], and heterogeneous catalysis [9]. The carboxylic acids show diverse coordination modes and are extensively employed to assemble porous CPs via reticular synthesis by Yaghi’s group [23,24]. Acid including carboxyl and 4-imidazolyl groups, assembled into two series of Cu(II)/Cu(I) and complexes due to its diverse coordination modes [27]. Due to their good adjustability for N/O donor. Cd(II) complexes due to its diverse coordination modes [27] Due to their good adjustability for N/O ligands, we have designed the new ligand 2-methyl-4-(4H-1,2,4-triazol-4-yl) benzoic acid (HL). The structure of 2-methyl-4-(4H-1,2,4-triazol-4-yl) benzoic acid (HL) ligand with difunction groups highlighted in pink circles.
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