Pervoskite-like hybrid lead bromides with bipyridine as structure-directing agent

Publication date: Available online 24 September 2018Source: Journal of Solid State ChemistryAuthor(s): Yong Liu, Dongliang Liu, Tao WuAbstractTwo perovskite-like hybrid lead bromides were synthesized via solvothermal reaction with bipyridine (Bpy) as structure-directing agent, and structurally characterized as [(PbBr4)(H2Bpy)] (1) and [(Pb3Br10)(H2Bpy)2(H2O)2] (2), respectively. Compound 1 contains 1D chain built from the edge-sharing [Pb2Br8]4- dimers, while compound 2 has 2D layered structure constructed by vertex-sharing [Pb3Br10]4- trimers. The band gap of compound 1 and 2 were determined to be 2.25 and 2.78 eV, respectively, as revealed by UV-vis diffuse-reflectance measurements. Interestingly, the stable compound 1 in air exhibits efficient photocatalytic dye degradation under the irradiation of visible light.Graphical abstractTwo novel hybrid lead bromides were synthesized with bipyridine as SDA under solvothermal condition. Compound 1 displays good stability in air at least one month, and makes it a photocatalyst candidate for degrading RhB under visible light, which makes it a new type of photo-catalyst for dye degradation.

Source: Journal of Solid State Chemistry - October 5, 2018 Category: Chemistry Source Type: research