The synthesis, structure and photoluminescence of new (C8H18N)2CdCl4 crystals

Abstract

Organic-inorganic hybrid new (C8H18N)2CdCl4 single crystals were grown using a solution method, with its important physical properties, including in structure, phase purity, thermal analysis, absorption and diffuse reflectance spectra, and photoluminescence characteristic were systematically studied. (C8H18N)2CdCl4 belongs to orthorhombic P212121 space group with zero-dimensional non-centrosymmetric structure. A high phase purity was confirmed by PXRD, FT-IR and Raman spectra, and a melting point of 120°C was determined by simultaneous thermal analysis. An absorption cut-off edge of 230 nm and optical band gap of 5.52 eV were determined, with high transmittance range of 300-1900 nm was detected. More importantly, a wide photoluminescence spectra covering visible range were observed, indicating a potential applications of (C8H18N)2CdCl4 in white light luminescence. This work can supply an important guiding significance for searching new zero-dimensional hybrid d10-based metal halides with tetrahedron framework with nontoxic, high stability and some fascinating properties, especially those with white light luminescence performance.