Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.258
Publication date: 18th December 2023
Metal halide perovskites nanocrystas (NCs) have promising applications as heterogeneous photocatalysts due to their strong visible-light absorption, band-gap engineering, charge transfer ability and easy recovery. There are several factors that influence the photocatalytic performance, such as NCs sizes, co-catalyst nature, solvent, and atmosphere. Although there are several examples in their use as photocatalyst for the CO2 reduction and H2 generation a more limited information is available for organic chemical transformations. Here, the photocatalytic activity of colloidal CsPbBr3 NCs and Cs3Sb2Br9 NCs for the photoreduction of p-substituted benzyl bromides under visible-light excitation, using a sacrificial electron donor (N,N-diisopropylethylamine or methanol), will be discussed. Interesting the electron donating and electron withdrawing ability of the substituent determines the selectivity of the reaction towards C-C formation or reductive dehalogenation. The role of the organic ligands to drive forward the C-C coupling and the affinity of the benzyl radicals to the metal halide NC surface will be illustrated.
We thank the Spanish Ministry of Science and Innovation (MICINN), projects PID2020-115710GB-I00, Agencia Estatal de Investigación-AEI and MICIU Unit of Excellence “Maria de Maeztu” CEX2019-000919-M, as well as the Generalitat Valenciana projects PROMETEO/2022/57, IDIFEDER/2018/064 and IDIFEDER/2021/064, and IDIFEDER/2021/064, all of which partially cofinanced this work with FEDER funds. I.R.-P. acknowledge support from the Spanish Ministry of Science, Innovation, and Universities (FPU17/05564).
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