Synthesis, crystal structure and photoluminescence of a three-dimensional zinc coordination compound with NBO-type topology

Abstract

The assembly of metal-organic frameworks (MOFs) with metal ions and organic ligands is currently attracting considerable attention in crystal engineering and materials science due to their intriguing architectures and potential applications. A new three-dimensional MOF, namely poly[[diaqua( 8 -para-terphenyl-3,3 0 ,5,5 0 -tetracarboxylato)dizinc(II)] dimethylformamide disolvate monohydrate], {[Zn 2 (C 22 H 10 O 8 )(H 2 O) 2 ]Á2C 3 H 7 NOÁH 2 O} n , was synthesized by the selfassembly of Zn(NO 3 ) 2 Á6H 2 O and para-terphenyl-3,3 0 ,5,5 0 -tetracarboxylic acid (H 4 TPTC) under solvothermal conditions. The compound was structurally characterized by FT-IR spectroscopy, elemental analysis and single-crystal X-ray diffraction analysis. Each Zn II ion is located in a square-pyramidal geometry and is coordinated by four carboxylate O atoms from four different TPTC 4À ligands. Pairs of adjacent equivalent Zn II ions are bridged by four carboxylate groups, forming [Zn 2 (O 2 CR) 4 ] (R = terphenyl) paddle-wheel units. One aqua ligand binds to each Zn II centre along the paddle-wheel axis. Each [Zn 2 (O 2 CR) 4 ] paddle wheel is further linked to four terphenyl connectors to give a three-dimensional framework with NBO-type topology. The thermal stability and solid-state photoluminescence properties of the title compound have also been investigated.

Two new NiII and ZnII metal–organic frameworks of glutarate and 1,4-bis[(2-methyl-1H-imidazol-1-yl)methyl]benzene ligands: syntheses, structures and luminescence sensing properties

“…In recent years, as an intriguing class of hybrid inorganicorganic materials, metal-organic frameworks (MOFs) have been studied intensively (Li et al, 2014b;Liu et al, 2019) due to their versatile nature and outstanding potential applications in many fields, such as luminescence (Cui et al, 2016), proton conduction (Li et al, 2017;Sun et al, 2016), ferroelectricity (Shi et al, 2019), magnetism (Mínguez Espallargas & Coronado, 2018), photocatalysis (Qian et al, 2019) and gas storage and separation (Lin et al, 2019). Luminescent MOFs can generate photoluminescence and further act as luminescence sensing materials (Zhang et al, 2018), and have been investigated extensively in the sensing of toxic pollutants, such as inorganic heavy metal ions and small organic molecules (Pan et al, 2019;Yang et al, 2012;Zhao et al, 2016Zhao et al, , 2019d, and play important roles in the protection of the environment and human health (Gao et al, 2019;Hu et al, 2014).…”

Synthesis, structure and photocatalytic degradation of organic dyes of a copper(II) metal–organic framework (Cu–MOF) with a 4-coordinated three-dimensional CdSO4 topology

“…Metal-organic frameworks (MOFs) have attracted much interest in a wide range of fields, such as gas separation and storage, catalysis synthesis, nonlinear optics, sensors, luminescence, magnetism, photocatalysis gradation and crystal engineering, because of their diverse properties and intriguing topologies (Dhakshinamoorthy et al, 2018;Canali & Sherrington, 1999;Liu et al, 2019;Stassen et al, 2017;Cui et al, 2018;Su et al, 2019;Bhat et al, 2019;Chen et al, 2019;Dui et al, 2015;Lustig et al, 2017). Organic dyes are some of the main contaminations of wastewater and the disposal of wastewater is an important concern.…”