A 5-fold Interpenetrated and Porous Dia-net Metal-Organic Framework Constrcuted from Long and Linear Phenyl-carboxylate Linkers

Abstract

Interpenetration regulation is of great significance for both the crystal engineering and functional chemistry of MOFs. The combination of long and linear ditopic organic linkers with single or small metal node is effective to produce interpenetration metal-organic framework. Here, a 5-fold interpenetrated and porous dia-net metal-organic framework of [Cd(tpdc)2 ]·3DMF (Cd-MOF, H2 tpdc = 2′,5′-dimethylterphenyl-4,4″-dicarboxylate) was synthesizd under solvothermal reaction, which was structurally characterizaed by single X-ray crystal diffraction, coupled with thermal and luminescence properties study. The compound crystallises in monoclinic P2/c space group with cell parameters of a = 15.7789(4) Å, b = 24.8437(7) Å, c = 26.3720(4) Å, α = 90o , β = 96.5583(19)o , γ = 90o , and V = 23967 Å3 There are 1D channels and porosity of 57.5% for the Cd-MOF, which is a rare example of MOFs with coexistence of high-degree interpenetration and high porosity. The MOF can thermally stable up to 360 o C, with light blue lumiscent emission at 360 nm under a ultraviolet radiation.