Enhancement of Electrical Conductivity due to Structural Distortion from Linear to Nonlinear Dicarboxylato-Bridged Zn(II) 1D-Coordination Polymers

Coordination polymers are useful materials in different fields of applications, including the development of supramolecular electrical devices for the use of renewable energy sources. In this work, we have designed two new classes of mixed-ligand one-dimensional coordination polymers (1D CPs) [Zn(ADC)(PBT)2(H2O)2]n (1) and [Zn(Succ)(PBT)2(H2O)2]n (2) (ADC2–, acetylenedicarboxylato; Succ2–, succinato; PBT, 2-pyridin-4-ylbenzothiazole) and characterized them by elemental analysis, infrared spectra (IR), single-crystal X-ray diffraction data, powder X-ray diffraction (PXRD), and thermogravimetric analysis (TGA) data. In the structural motif Zn(II) is bridged by an aliphatic dicarboxylato ligand (ADC/Succ) and two axial positions are occupied by pyridyl-N of PBT along with water coordination. ADC acts as a monodentate carboxylato-O ligand in compound 1, whereas in 2 Succ serves as a carboxylato-O,O chelator. Compounds 1 and 2 are both isostructural and construct 3D supramolecular networks by hydrogen bonds (b...