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dc.contributor.authorCabeza-Diaz, Aurelio 
dc.contributor.authorBazaga-García, Montse
dc.contributor.authorColodrero, Rosario M.P.
dc.contributor.authorPapadaki, M.
dc.contributor.authorOlivera-Pastor, Pascual 
dc.contributor.authorLosilla, Enrique R.
dc.contributor.authorLeón-Reina, Laura
dc.contributor.authorChoquesillo-Lazarte, Duane
dc.contributor.authorGarczarek, Piotr
dc.contributor.authorZoń, J.
dc.contributor.authorGarcía-Aranda, Miguel Ángel 
dc.contributor.authorDemadis, Konstantinos D.
dc.date.accessioned2014-06-25T11:54:45Z
dc.date.available2014-06-25T11:54:45Z
dc.date.created2014-06-25
dc.date.issued2014-06-25
dc.identifier.urihttp://hdl.handle.net/10630/7726
dc.description.abstractMulti-chelating phosphonate ligands are organic linkers alternative to polycarboxylates and other ligands providing synthetic access to a number of thermally- and chemically-stable MOFs [1]. Metal phosphonates are amenable for accessing suitable and highly conducting materials both by tuning structural features and post-synthesis treatment [2,3]. For instance, proton conductivity values in the order of 10−2 S cm–1 have been reported for several phosphonate-based compounds [4]. We report hereby the synthesis, structural characterization and proton conductivity of an open framework hybrid, Ca2[(HO3PC6H3COOH)2]2[(HO3PC6H3(COO)2H).(H2O)2].5H2O, that combines Ca2+ ions and the rigid polyfunctional ligand 5-(dihydroxyphosphoryl)isophthalic acid. This compound was obtained by slow crystallization at ambient conditions at pH 3. Its complex pillared layered structure, solved by single crystal X-ray analysis, contains hydrophilic 1D channels filled with both water and acidic phosphonate and carboxylate groups creating a hydrogen-bonded network. Partial removal of the lattice water at 75 °C causes a monoclinic structural distortion but still retaining the initial conductivity properties (5.7x10-4 Sxcm-1). Exposure of the sample to ammonia vapor from a concentrated aqueous solution led to major structural changes resulting in a new layered material containing seven NH3 and sixteen H2O molecules per formula. This solid exhibits enhanced conductivity, reaching 6.6x10-3 S.cm-1, as measured at 98 % RH and T = 24 °C. Activation energies were between 0.23 and 0.40 eV, typical of a Grothuss mechanism of proton conduction.es_ES
dc.description.sponsorshipUniversidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Proyecto Excelencia Junta de Andalucía, FQM-1656. MAT2010-15175.es_ES
dc.language.isoenges_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.subjectConductividad eléctricaes_ES
dc.subject.otherMetal phosphonateses_ES
dc.subject.otherProton conductivityes_ES
dc.subject.otherHybrid materialses_ES
dc.subject.otherFuel cellses_ES
dc.subject.otherFunctional materialses_ES
dc.subject.otherInorganic-organic materialses_ES
dc.titleTuning Proton Conductivity in A Multifunctional Calcium Phosphonate Hybrid Frameworkes_ES
dc.typeinfo:eu-repo/semantics/conferenceObjectes_ES
dc.centroFacultad de Cienciases_ES
dc.relation.eventtitle14th European Powder Diffraction Conference (EPDIC-14)es_ES
dc.relation.eventplaceAarhus (Dinamarca)es_ES
dc.relation.eventdate15/06/2014es_ES


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