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  • Ojwang, Dickson O.Stockholms universitet,Institutionen för material- och miljökemi (MMK),Stockholm Univ, Arrhenius Lab, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden. (author)

Structure Characterization and Properties of K-Containing Copper Hexacyanoferrate

  • Article/chapterEnglish2016

Publisher, publication year, extent ...

  • 2016-06-03
  • American Chemical Society (ACS),2016
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-132403
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-132403URI
  • https://doi.org/10.1021/acs.inorgchem.6b00227DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-299716URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Copper hexacyanoferrate, Cu-II[Fe-III(CN)(6)](2/3)center dot nH(2)O, was synthesized, and varied amounts of IC ions were inserted via reduction by K2S2O3 (aq). Ideally, the reaction can be written as Cu-II[Fe-III(CN)(6)](2/3)-nH(2)O + 2x/3K(+) + 2x/3e(-)K(+) <-> K-2x/3 Cu-II[Fe-x(II).Fe-1-x(II),(CN)(6)](2/3)-nH(2)O. Infrared, Raman, and Mossbauer spectroscopy studies show that Fe-II is continuously reduced to Fell with increasing x, accompanied by a decrease of the a-axis of the cubic Fn (3) over barm unit cell. Elemental analysis of K by inductively coupled plasma shows that the insertion only begins when a significant fraction similar to 10% of the Fe-III, has already been reduced. Thermogravimetric analysis shows a fast exchange of water with ambient atmosphere and a total weight loss of similar to 26 wt % upon heating to 180 degrees C, above which the structure starts to decompose. The crystal structures of Cu-III[Fe-III(CN)(6)](2/3)center dot nH(2)O and K2/3Cu[Fe(CN)(6)](2/3)center dot nH(2)O were refined using synchrotron X-ray powder diffraction data. In both, one-third of the Fe(CN)(6) groups are vacant, and the octahedron around Cull is completed by water molecules. In the two structures, difference Fourier maps reveal three additional zeolitic water sites (8c, 32f, and 48g) in the center of the cavities formed by the-Cu-N-C-Fe- framework. The K-containing compound shows an increased electron density at two of these sites (32f and 48g), indicating them to be the preferred positions for the K+ ions.

Subject headings and genre

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  • Grins, JekabsStockholms universitet,Institutionen för material- och miljökemi (MMK),Stockholm Univ, Arrhenius Lab, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden.(Swepub:su)mat (author)
  • Wardecki, DariuszStockholms universitet,Institutionen för material- och miljökemi (MMK),Stockholm Univ, Arrhenius Lab, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden.(Swepub:su)dward (author)
  • Valvo, MarioUppsala universitet,Strukturkemi(Swepub:uu)marva692 (author)
  • Renman, ViktorUppsala universitet,Strukturkemi(Swepub:uu)vikre850 (author)
  • Häggström, LennartUppsala universitet,Materialfysik(Swepub:uu)lennhagg (author)
  • Ericsson, ToreUppsala universitet,Materialfysik(Swepub:uu)toreeric (author)
  • Gustafsson, TorbjörnUppsala universitet,Strukturkemi(Swepub:uu)tgu19364 (author)
  • Mahmoud, AbdelfattahForschungszentrum Julich, JARA FIT, Julich Ctr Neutron Sci JCNS, D-52425 Julich, Germany.;Forschungszentrum Julich, JARA FIT, Peter Grunberg Inst PGI, D-52425 Julich, Germany.;Univ Liege, Inst Phys, Inst Chem B63APTIS, LCIS GREENMAT, B-4000 Liege, Belgium. (author)
  • Hermann, Raphael P.Forschungszentrum Julich, JARA FIT, Julich Ctr Neutron Sci JCNS, D-52425 Julich, Germany.;Forschungszentrum Julich, JARA FIT, Peter Grunberg Inst PGI, D-52425 Julich, Germany.;Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA. (author)
  • Svensson, GunnarStockholms universitet,Institutionen för material- och miljökemi (MMK),Stockholm Univ, Arrhenius Lab, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden.(Swepub:su)gunnar (author)
  • Stockholms universitetInstitutionen för material- och miljökemi (MMK) (creator_code:org_t)

Related titles

  • In:Inorganic Chemistry: American Chemical Society (ACS)55:12, s. 5924-59340020-16691520-510X

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