Synthesis,Structure And Properties Of The Organic-inorganic Hybrid Perovskite Materials

The hybrid organic-inorganic perovskite?HOIPs?functional material is a new kind of composite crystal material composed of organic and inorganic parts.Inorganic components can supply the hybrid structure with thermal stability,hardness,as well as magnetic and dielectric properties.Besides,organic ligands not only play the role to act as templates which were the key to decide the structure of inorganic parts,but also offer the hybrids with structural diversity,highly efficient electric/optical properties and flexibilities.In the past decade,organic-inorganic hybrid compounds have been well developed and applied in various fields.Research work of this paper is divided into three parts:Firstly,the reactions of R,R-,cis-and trans-1,2-cyclohexanediamine with antimony?III?or lead?II?iodide in concentrated HI aqueous afforded five or-ganic inorganic hybrid compounds[?cis-C6H16N2?SbI5]·H2O?1?,[?trans-C6H16N2?SbI5]·H2O?2?,[?R,R-1,2-C6H16N2?PbI4]?3?,[?cis-1,2-C6H16N2?2Pb2I8]·2H2O?4?and[?trans-1,2-C6H16N2?2PbI6]·2H2O?5?,respectively.In addition,the complexes1-5 have been investigated by UV–vis,TG analysis,and fluorescent spectra.Secondly,An organic-inorganic hybrid molecule[?PyCH2NH3?6][Pb5I22]?3H₂O?6?with a 2D inorganic layer was produced by reaction of 2-aminomethyl-pyridine with PbI2 in concentrated HI aqueous solution.Compound 6 exhibited a solid thermochromism showing reversible color change from orange at room temperature to red at 80?,which was caused by the structural changes.Thirdly,the introduction of two inorganic–organic hybrid compounds[?C7H18N2?6Pb7I26]?7?and[?C7H18N2?Pb2I6]?8?have been synthesized by reactions of2-?2-aminoethyl?-1-methylpyrrolidine and lead iodide with 1:1 and 1:2 molar ratios in concentrated HI aqueous.In addition,both complexes showed fluorescent properties with complex 7 emitted green light at 545 nm and complex 8 emitted blue light at 467nm.