6533b7cffe1ef96bd1257d14
RESEARCH PRODUCT
Decomposition Process of Carboxylate MOF HKUST-1 Unveiled at the Atomic Scale Level
Gianpiero BuscarinoLuisa SciortinoFabrizio MessinaAntonino AlessiAntonino AlessiMarco RanocchiariMarco CannasMichela TodaroMichela TodaroFranco Mario GelardiMarco Taddeisubject
metal-organic-frameworks MOF electron paramagnetic resonance EPR ESR water structural stabilityInorganic chemistryFOS: Physical sciences02 engineering and technology010402 general chemistry01 natural sciencesAtomic unitslaw.inventionCatalysisMetalCrystalchemistry.chemical_compoundAdsorptionlawPhysics - Chemical PhysicsCarboxylatePhysical and Theoretical ChemistryElectron paramagnetic resonanceChemical Physics (physics.chem-ph)Condensed Matter - Materials ScienceChemistryMaterials Science (cond-mat.mtrl-sci)021001 nanoscience & nanotechnology0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsGeneral EnergyChemical engineeringvisual_artvisual_art.visual_art_mediumMetal-organic framework0210 nano-technologydescription
HKUST-1 is a metal-organic framework (MOF) which plays a significant role both in applicative and basic fields of research, thanks to its outstanding properties of adsorption and catalysis but also because it is a reference material for the study of many general properties of MOFs. Its metallic group comprises a pair of Cu2+ ions chelated by four carboxylate bridges, forming a structure known as paddle-wheel unit, which is the heart of the material. However, previous studies have well established that the paddle-wheel is incline to hydrolysis. In fact, the prolonged exposure of the material to moisture promotes the hydrolysis of Cu-O bonds in the paddle-wheels, so breaking the crystalline network. The main objective of the present experimental investigation is the determination of the details of the structural defects induced by this process in the crystal and it has been successfully pursued by coupling the electron paramagnetic resonance spectroscopy with other more commonly considered techniques, as X-ray diffraction, surface area estimation and scanning electron microscopy. Thanks to this original approach we have recognized three stages of the process of decomposition of HKUST-1 and we have unveiled the details of the corresponding equilibrium structures of the paddle-wheels at the atomic scale level.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-01-01 | The Journal of Physical Chemistry C |