Blue-Emitting Zero-Dimensional Inorganic–Organic Hybrids Constructed from Beta-Diketonate Ligands and Bulky Organic Cations

Abstract

Two zero-dimensional inorganic−organic hybrids, namely, [C 4 mim][Cd(TCDPPA) 3 ] (1) and [C 4 mpy][Cd(TCDPPA) 3 ] (2), where (TCDPPA) − = 2,2,2-trichloro-N-(di(pyrrolidin-1-yl)phosphoryl)acetamide, (C 4 mim) + = 1-butyl-3-methylimidazolium, and (C 4 mpy) + = 1-butyl-4methylpyridinium, have been synthesized via metathesis reactions and characterized systematically. These ionic cadmium-containing inorganic− organic hybrid compounds are assembled from a bulky organic cation and a complex anion constructed from the chelation of three TCDPPA ligands to one cadmium ion. These compounds possess wide band gaps and emit in the deep-blue region intensely with a quantum yield as high as 34.04%. The success of this work provides a new method for the design and fabrication of high-efficiency blue-emitting materials.

Assembly of a cadmium(ii)-based chiral complex: crystal structure and optical properties for solid state white-light emission applications

“…21–23 Moreover, the higher excitation wavelengths, from 440 nm to 560 nm, generate higher emission peaks red-shifted from 583 nm to 601 nm with higher intensities when compared to the excitation wavelengths. Therefore, these emissions can be mainly ascribed to the intra- and the inter- ligands transitions 21,25,26 (Fig. 10).…”