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Instruments / Technical Area	Publication Details	Published	Actions
I20-Scanning-X-ray spectroscopy (XAS/XES)	Mixed‐valence Ce/Zr metal‐organic frameworks: Controlling the oxidation state of cerium in one‐pot synthesis approach Maria Ronda‐lloret , Isaac Pellicer-Carreño , Aida Grau-Atienza , Roberto Boada , Sofia Diaz-Moreno , Javier Narciso-Romero , Juan Carlos Serrano-Ruiz , Antonio Sepulveda-Escribano , Enrique V. Ramos-Fernandez Advanced Functional Materials 4 DOI: 10.1002/adfm.202102582 Diamond Proposal Number(s): [19114] Open Access Show Abstract ▼ Abstract: The preparation of MOFs including a metal with an easily exchangeable oxidation state, while maintaining the same crystal structure and stability, is of paramount importance for myriad applications. In this work, a new synthesis method is reported that can be used to prepare Ce/Zr‐MOFs (UiO‐66 structure) having only Ce(III), a mixed‐valence Ce(IV)/Ce(III), or only Ce(IV) cations, as desired. The materials are characterized using a large number of techniques, including X‐ray absorption and X‐ray photoelectron spectroscopies.	May 2021
I19-Small Molecule Single Crystal Diffraction	Efficient gas separation and transport mechanism in rare hemilabile metal-organic framework Marta Mon , Rosaria Bruno , Estefanía Tiburcio , Aida Grau-Atienza , Antonio Sepulveda-Escribano , Enrique V Ramos-Fernandez , Alessio Fuoco , Elisa Esposito , Marcello Monteleone , Johannes Carolus Jansen , Joan Cano , Jesus Ferrando-Soria , Donatella Armentano , Emilio Pardo Chemistry Of Materials DOI: 10.1021/acs.chemmater.9b01995 Diamond Proposal Number(s): [18768] Show Abstract ▼ Abstract: Understand/visualize the established interactions between gases and adsorbents is mandatory to implement better per-formant materials in adsorption/separation processes. Here we report the unique behavior of a rare example of a hemila-bile chiral three-dimensional metal-organic framework (MOF) with an unprecedented qtz-e-type topology, with formula CuII2(S,S)-hismox . 5H2O (1) (hismox = bis[(S)-histidine]oxalyl diamide). 1 exhibits a continuous and reversible breath-ing behavior, based on the hemilability of carboxylate groups from L-histidine. In-situ powder (PXRD) and single crystal X-ray diffraction (SCXRD) using synchrotron radiation allowed to unveil the crystal structures of 4 different host-guest adsorbates (Ar, N2, CO2 and C3H6@1), the rationalization of the breathing motion and unravel the mechanisms govern-ing the adsorption of these gases. Then, this information has been transferred to implement efficient separations of mix-tures of industrial and environmental relevance –CO2/N2, CO2/CH4 and C3H8/C3H6 using 1 in packed columns as the sta-tionary phase and dispersed in a mixed matrix membrane.	Jul 2019

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