A novel inorganic-organic hybrid material of bis (5,7-dichloro-8-hydroxyquinolium) tetrachlorozincate (II) dihydrate was crystallized and characterized by IR, Raman, 13C NMR spectroscopy, scanning electron microscopy (SEM) and thermal analyses (TG/DTG/SDTA). The solid-state structures were determined by single crystal X-ray diffraction. The compound was found to crystallizes in the non-centrosymmetric orthorhombic system, space group P212121 with the following cell parameters a = 10.4872(3) Å, b = 13.4464 (5) Å, c = 18.0305 (7) Å, V = 2542.57(15) Ǻ3 and Z = 4, to ensure that our samples are single-phase, the purity of our products was verified by X-Ray Powder Diffraction Analysis, while the composition of our phase was verified by semi-quantitative analysis EDXS. Thermal analysis showed that the complexes decompose in three steps: the structural water was firstly progressively lost, then the neutral ligand of 5,7-dichloro-8-hydroxyquinolium and lastly the second ligand with 4 mol of chlorine in the form of hydrochloric acid. The final phase solid product at 713 °C is zinc oxide. The theoretical calculations were conducted using B3LYP/LanL2DZ basis sets using GAUSSIAN09, for studying the structural parameters, vibrational and non-linear optical characterization (NLO) of the investigated compound. The analyses of the optical spectra indicate that this compound has a direct band gap energy equal to (2.72 eV) due to direct transition. This energy is much larger than 0.02 eV. The photoluminescence properties (PL) of the compound were investigated in the solid-state at room temperature.

Financial support from Faculty of Science in University of Sfax, Tunisia, Spanish Ministerio de Economía y Competitividad (MINECO-13-MAT2013-40950-R, MAT2016-78155-C2-1-R and FPI grant BES-2011-046948 to MSM.A.), Gobierno del Principado de Asturias (GRUPIN14-060) and FEDER funding are acknowledged.