Synthesis,Structures,and Optical Properties of Cadmium Iodide/Phenethylamine Hybrid Materials with Controlled Structures and Emissions

摘要

A new type of organic-inorganic hybrid materials based on cadmium iodide (Cdl2) and phenethylamine (PEA) has been synthesized and characterized.The reaction of Cdl2 with PEA in a 1:2 molar ratio yields a four-coordinate hybrid material Cdl2(PEA)2 (1) with extended 1D (Cdl2)n chains,while the reaction of Cdl2 with PEA in a 1:4 molar ratio produces a six-coordinate hybrid material Cdl2(PEA)4 (2) with a discrete linear structure of Cdl2 moiety.By introducing a trace amount of Na2S to the reaction for Cdl2(PEA)2,we obtained a new compound [Cdl2(PEA)2]-(CdS)_(0.038) (3) with uniformly doped CdS nanoparticles.Steady and transient photoluminescence studies reveal that compounds 1 and 2 exhibit bright blue (465 nm) and green (512 nm) fluorescent emissions in solid state at room temperature,respectively,while compound 3 gives a broad and complex emission ranging from 450 to 700 nm.Theoretical studies of electronic structures were carried out using density functional theory in order to gain a good understanding of the luminescent behaviors of these hybrid materials.