Elaboration, structural, vibrational and optical investigation of a two-dimensional self-assembled organic–inorganic hybrid compound

Abstract

Single crystals of a hybrid organic/inorganic material with the formula (C4N3H16)Cl[CuCl4] were elaborated and studied by X-ray diffraction, and photoluminescence. The crystals consist of a self-assembled multilayer structure with a Pnam space group. The structure is built up from the staking of infinite two-dimensional layers of CuCl6 corner-sharing octahedra, separated by organic (C4N3H16)3+ chains. Such a structure may be regarded as a multi quantum well system, in which CuCl6 layers act as semiconductor wells and the organic molecules act as insulator barriersFurthermore, the room temperature IR and Raman spectra of the title compound were recorded and analyzed. For optical investigations, thin films have been prepared by spin-coating method from the ethanol solution of the material. Optical absorption spectra shows characteristic absorptions of CuCl-based layered perovskite centered at 300 and 380nm, whereas the photoluminescence spectra shows a bleu intense emission around 420nm, associated to radiative recombination of confined excitons in the CuCl6 Quantum wells.