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  • Title: Well-studied Cu-BTC still serves surprises: evidence for facile Cu2+/Cu+ interchange.
    Author: Szanyi J, Daturi M, Clet G, Baer DR, Peden CH.
    Journal: Phys Chem Chem Phys; 2012 Apr 07; 14(13):4383-90. PubMed ID: 22354204.
    Abstract:
    Cu-BTC (also known as HKUST-1) is a well-characterized metal-organic framework material produced in an industrial scale and widely studied for a number of potential applications by the scientific community. The co-existence of Cu(+) and Cu(2+) entities has already been observed in this material, but the presence of Cu(+) ions was attributed to oxide impurities. The results presented here clearly demonstrate that Cu(+) ions can be present in high concentrations inside the hybrid structure. Furthermore, switching between the two copper oxidation states can be induced by redox treatments, using vacuum and/or reducing gases at different sample temperatures.
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