Structure characterization, photoluminescence and dielectric properties of a new hybrid compound containing chlorate anions of zincate (II)

A new hybrid compound, bis (2-aminophenylenamonium) tetrachlorozincate (II), was synthesized and formulated as (C6H9N2)(2)ZnCl4. Its crystal structure was solved by single crystal X-ray diffraction reveling that compound crystallizes in the monoclinic system, space group C2/c (N degrees : 15) with cell parameters a = 7.4957(4) angstrom, b = 25.6837(15) angstrom, c = 9.4041(5) angstrom, beta=94.35(0)degrees, V=1805.23(45) angstrom(3). Their atomic arrangement can be described as an alternation of inorganic and organic layers, [ZnCl4](2-) tetrahedral anions and 2-aminophenylenamonium cations. The cohesion of the atomic arrangement is ensured by hydrogen bonds (strong N-H center dot center dot N and weak N-H center dot center dot center dot Cl) and pi-pi stacking interactions between identical antiparallel organic moieties. In optical transmission and photoluminescence measurements, this material exhibit two absorption bands (253 and 316 nm) and a strong emission line (390 nm), while the thermal analysis disclosed a phase transition at 420-445 K previously to the sample decomposition at 476K. Finally, electrical measurements were performed to discuss the phase-transition mechanism. (C) 2018 Elsevier B.V. All rights reserved.