Local Structure of Framework Cu(II) in HKUST-1 Metallorganic Framework:  Spectroscopic Characterization upon Activation and Interaction with Adsorbates

摘要: XRD, UV−Vis, EXAFS, XANES, and Raman techniques have been used to study the removal of water molecules coordinated Cu(II) framework atoms novel HKUST-1 metal-organic framework. The dehydration process preserves crystalline nature material, just causing a reduction cell volume due shrinking [Cu2C4O8] cage. adsorbed H2O molecule makes sites available for interaction with other probe molecules. In situ IR spectroscopy has evidenced formation at liquid nitrogen temperature labile Cu(II)···CO adducts characterized by ν(C−O) = 2178 cm-1 15 K Cu(II)···H2 ν(H−H) 4100 cm-1. To best our knowledge, we observed first time clear signal carbonyl dihydrogen complexes formed inside microporous hosting matrix. sinking oxygens carboxyl units, undergone ions in process, is responsible for...