Novel two-fold interpenetrated Zn-based metal-organic framework with triple-stranded right- and left-handed helical chains

A novel Zn(II) metal-organic framework [Zn3(tib)2(L)3] (1) was synthesized with mixed ligands of 1,3,5-tris(1-imidazolyl)benzene (tib) and 4-carboxycinnamate (L2 −), exhibiting interesting two-fold interpenetration, where triple-stranded homochiral left- (L-) and right- (R-) handed helical chains were constructed by linear rigid ligand L2 − and metal ions. The complex was well characterized by single crystal and powder X-ray diffractions (PXRD), infrared spectroscopy (IR), elemental analysis (EA) and thermogravimetric analysis (TGA). As a result, the complex shows high thermal stability and strong photoluminescent emission in the solid state at room temperature.