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The solid solutions (Per)(2)[PtxAu(1-x)(mnt)(2)]; alloying para-and diamagnetic anions in two-chain compounds

2017-06Journal article Restricted access
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dc.contributor.authorMatos, Manuel
dc.contributor.authorBonfait, Gregoire
dc.contributor.authorSantos, Isabel C.
dc.contributor.authorAfonso, Monica L.
dc.contributor.authorHenriques, Rui T.
dc.contributor.authorAlmeida, Manuel
dc.date.accessioned2017-11-29T15:21:42Z
dc.date.available2017-11-29T15:21:42Z
dc.date.issued2017-06
dc.description.abstractThe alpha-(Per)(2)[M(mnt)(2)] compounds with M = Pt and Au are isostructural two-chain solids that in addition to partially oxidized conducting perylene chains also contain anionic chains that can be either paramagnetic in the case of M = Pt or diamagnetic for M = Au. The electrical transport and magnetic properties of the solid solutions (Per)(2)[Pt-x-Au(1-x)(mnt)(2)] were investigated. The incorporation of paramagnetic [Pt(mnt)(2)] impurities in the diamagnetic chains, and the effect of breaking the paramagnetic chains with diamagnetic centers for the low and high Pt range of concentrations were respectively probed. In the low Pt concentration range, there is a fast decrease of the metal-to-insulator transition from 12.4 K in the pure Au compound to 9.7 K for x = 0.1 comparable to the 8.1 K in the pure Pt compound. In the range x = 0.5-0.95, only beta-phase crystals could be obtained. The spin-Peierls transition of the pure Pt compound, simultaneous with metal-to-insulator (Peierls) transition is still present for 2% of diamagnetic impurities (x = 0.98) with transition temperature barely affected. Single crystal X-ray diffraction data obtained a high-quality structural refinement of the alpha- phase of the Au and Pt compounds. The beta-phase structure was found to be composed of ordered layers with segregated donors and anion stacks, which alternate with disordered layers. The semiconducting properties of the beta-phase are due to the disorder localization effects.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMATOS, Manuel [et al] - The solid solutions (Per)(2)[PtxAu(1-x)(mnt)(2)]; alloying para-and diamagnetic anions in two-chain compounds. Magnetochemistry. ISSN 2312-7481. Vol. 3, N.º 2 (2017), pp. 1-13pt_PT
dc.identifier.doi10.3390/magnetochemistry3020022pt_PT
dc.identifier.issn2312-7481
dc.identifier.urihttp://hdl.handle.net/10400.21/7627
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationPTDC FIS/113500/2009pt_PT
dc.relation.publisherversionfile:///C:/Users/utilizador2/Downloads/magnetochemistry-03-00022.pdfpt_PT
dc.subjectOrganic conductorspt_PT
dc.subjectPerylenept_PT
dc.subjectMetal-dithiolatept_PT
dc.subjectOrganic alloyspt_PT
dc.subjectConductivitypt_PT
dc.subjectThermoelectric powerpt_PT
dc.subjectMagnetic susceptibilitypt_PT
dc.subjectSpin-Peierls transitionpt_PT
dc.subjectPeierls transitionpt_PT
dc.titleThe solid solutions (Per)(2)[PtxAu(1-x)(mnt)(2)]; alloying para-and diamagnetic anions in two-chain compoundspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FEEA%2F50008%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04349%2F2013/PT
oaire.citation.endPage13pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleMagnetochemistrypt_PT
oaire.citation.volume3pt_PT
oaire.fundingStream5876
oaire.fundingStream5876
person.familyNameMatos
person.familyNameBonfait
person.givenNameManuel
person.givenNameGrégoire
person.identifier.ciencia-id2E14-6146-CC46
person.identifier.ciencia-idB31B-C875-5D9D
person.identifier.orcid0000-0002-5240-8070
person.identifier.orcid0000-0003-3090-2884
person.identifier.scopus-author-id35588347400
person.identifier.scopus-author-id7003613519
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication7cd42489-28fb-4c13-aace-da7e9407e371
relation.isAuthorOfPublication.latestForDiscoverybb104304-4226-4d6d-babf-a872d11e783b
relation.isProjectOfPublicatione2d2f1f5-1327-45b3-954c-2fdc843270e7
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