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Instruments / Technical Area	Publication Details	Published	Actions
B07-C-Versatile Soft X-ray beamline: Ambient Pressure XPS and NEXAFS	Supported high- and medium-entropy nanoalloys from MOFs catalyze the alkene oxidation reaction Alejandro Lumbreras-Teijeiro , Anna Nowacka , Alejandro Serrano-Maldonado , Matthijs A. Van Spronsen , Judit Oliver-Meseguer , Antonio Leyva-Pérez Nanoscale 375–377 DOI: 10.1039/D5NR04879F Diamond Proposal Number(s): [28149] Open Access Show Abstract ▼ Abstract: High- and medium-entropy alloys (HMEAs) are emerging as promising catalysts due to their different electronics and very good thermal stability. HMEAs have already exhibited remarkable catalytic performance in several electrocatalytic reactions involving small molecules; however, their use in thermal complex organic reactions is still in its infancy. Herein, we present a highly dense supported HMEA material (≈50 wt% in metal) prepared by the pyrolysis of a metal–organic framework (MOF), used as a template in virtue of its well-spaced single metal atoms, to obtain catalytic carbon-supported nano-HMEAs in a particle-to-particle synthetic way. The solid material shows a remarkable catalytic activity for alkene oxidation reactions and can be recycled at least 10 times; however, a higher activity of the monometallic catalysts in terms of the turnover number is found. These results constitute, to our knowledge, one of the first examples of catalytic HMEAs for organic synthesis.	May 2026
I19-Small Molecule Single Crystal Diffraction	MOF–stabilized perfluorinated palladium cages catalyze the additive–free aerobic oxidation of aliphatic alcohols to acids Rossella Greco , Estefanía Tiburcio-Fortes , Antonio Fernandez , Carlo Marini , Alejandro Vidal-Moya , Judit Oliver-Meseguer , Donatella Armentano , Emilio Pardo , Jesus Ferrando-Soria , Antonio Leyva-Perez Chemistry – A European Journal DOI: 10.1002/chem.202103781 Diamond Proposal Number(s): [22411] Show Abstract ▼ Abstract: Extremely high electrophilic metal complexes, composed by a metal cation and very electron poor σ–donor ancillary ligands, are expected to be privileged catalysts for oxidation reactions in organic chemistry. However, their low lifetime prevents any use in catalysis. Here we show the synthesis of fluorinated pyridine–Pd 2+ coordinate cages within the channels of an anionic tridimensional metal organic framework (MOF), and their use as efficient metal catalysts for the aerobic oxidation of aliphatic alcohols to carboxylic acids without any additive. Mechanistic studies strongly support that the MOF–stabilized coordination cage with perfluorinated ligands unleashes the full electrophilic potential of Pd 2+ to dehydrogenate primary alcohols, without any base, and also to activate O 2 for the radical oxidation to the aldehyde intermediate. This study opens the door to design catalytic perfluorinated complexes for challenging organic transformations, where an extremely high electrophilic metal site is required.	Dec 2021

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