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@ARTICLE{Hocking:173062,
      author       = {Hocking, Rosalie K. and Malaeb, Rafah and Gates, Will P.
                      and Patti, Antonio F. and Chang, Lan-Yun and Devlin, Glyn
                      and MacFarlane, Douglas R. and Spiccia, Leone},
      title        = {{F}ormation of a {N}anoparticulate {B}irnessite - {L}ike
                      {P}hase in {P}urported {M}olecular {W}ater {O}xidation
                      {C}atalyst {S}ystems},
      journal      = {ChemCatChem},
      volume       = {6},
      issn         = {1867-3880},
      address      = {Weinheim},
      publisher    = {WILEY-VCH Verlag},
      reportid     = {FZJ-2014-06475},
      pages        = {2028 - 2038},
      year         = {2014},
      abstract     = {The fate of [MnIII/IV2(μ-O)2(terpy)2(H2O)2]3+ (1) under
                      conditions typically applied to test its ability to catalyze
                      water oxidation was studied by X-ray absorption spectroscopy
                      and UV/Vis spectrophotometry by using
                      [MnIII/IV2(μ-O)2(bipy)4]3+ (2) and Mn2+ as controls
                      (terpy=2,2′:6′,2“-terpyridine,
                      bipy=2,2′-bipyridine). The sample matrix, pH and choice of
                      oxidizing agent were found to have a significant effect on
                      the species formed under catalytic conditions. At low range
                      pH values (4–6), homogeneous catalysis testing in oxone
                      implied that 1 remains intact, whereas in clay intercalate
                      there is strong evidence that 1 breaks down to a
                      birnessite-like phase. In homogeneous solutions at higher
                      pH, the results are consistent with the same birnessite-like
                      structure identified in the clay intercalate. The use of the
                      molecular complexes, as a source of manganese instead of
                      simple MnII salts, was found to have the effect of slowing
                      down oxide formation and particle aggregation in solution.
                      The original analytical results that implied the systems are
                      molecular are discussed in the context of these new
                      observations.},
      cin          = {PGI-5},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-5-20110106},
      pnm          = {424 - Exploratory materials and phenomena (POF2-424)},
      pid          = {G:(DE-HGF)POF2-424},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000340573200027},
      doi          = {10.1002/cctc.201400066},
      url          = {https://juser.fz-juelich.de/record/173062},
}