Molecular Materials Coupling Localized Magnetic Moments and Delocalized Electrons

Abstract The magnetic properties of the radical salts formed by the organic donor bis-ethylenedithio-tetrathiafulvalene(in short ET) and magnetic polyoxoanions are presented. The used polyoxoanions are [XM(H2O)W11O39 −11 (X = Si, P; M = MnII, CrIII), with the Keggin structure and [CO4(H2O)2(PW9O34)2 −10, where a ferromagnetic CoII 4 cluster is encapsulated by two trivacant Keggin fragments.

[1]  E. Coronado,et al.  Coexistence of Mobile and Localized Electrons in Bis(ethylene)dithiotetrathiafulvalene (BEDT‐TTF) Radical Salts with Paramagnetic Polyoxometalates: Synthesis and Physical Properties of (BEDT‐TTF)8[CoW12O40]· 5.5 H2O , 1994 .

[2]  Achim Müller,et al.  Polyoxometalates : from platonic solids to anti-retroviral activity , 1994 .

[3]  Tasuku Ito,et al.  A weak antiferromagnetic interaction between manganese(2+) centers through a TCNQ column: crystal structures and magnetic properties of [MnII(tpa)(TCNQ)(CH3OH)](TCNQ)2.cntdot.CH3CN, [MnII(tpa)(.mu.-O2CCH3)]2(TCNQ)2.cntdot.2CH3CN, and [MnII(tpa)(NCS)2].cntdot.CH3CN (tpa = tris(2-pyridylmethyl)amine) , 1993 .

[4]  C. Bellitto,et al.  (BEDT-TTF)8[SiW12O40] and (BEDT-TTF)8[PMo12O40]: Two New Examples of 1D Organic Antiferromagnetic Systems , 1993 .

[5]  E. Coronado,et al.  First tetrathiafulvalene (TTF) cation-radical salt containing the inorganic polyoxometalate β-[Mo8O26]4○− , 1993 .

[6]  J. J. Borrás-Almenar,et al.  Organic-inorganic salts made by TTF and magnetic clusters , 1993 .

[7]  R. Friend,et al.  Structure and properties of tris[bis(ethylenedithio)tetrathiafulvalenium]tetrachlorocopper(II) hydrate, (BEDT-TTF)3CuCl4.H2O: first evidence for coexistence of localized and conduction electrons in a metallic charge-transfer salt , 1992 .

[8]  O. Peña,et al.  Preparations, x-ray crystal structures, EH band calculations, and physical properties of [(TTF)6(H)(XM12O40)(Et4N)] (M = tungsten, molybdenum; X = phosphorus, silicon): evidence of electron transfer between organic donors and polyoxometalates , 1992 .

[9]  P. Delhaès,et al.  Preparation and properties of tetrathia- and tetramethyltetraselena-fulvalene salts of [M6O19]2–(M = Mo or W) , 1992 .

[10]  P. Delhaès,et al.  New organic-donor inorganic-acceptor salts: [(TTF)6(XMo12O40) (Et4)], X = Si and P , 1991 .

[11]  Achim Müller,et al.  Polyoxometalate Chemistry: An Old Field with New Dimensions in Several Disciplines , 1991 .

[12]  D. Grandjean,et al.  The use of polyoxometallates as acceptors in charge transfer salts: preparation, X-ray crystal structures, and preliminary spectroscopic characterizations of D3M6O19, D = TTF, TMTSF; M = Mo, W , 1989 .

[13]  A. Davidson,et al.  Mixed-valence bis(ethylenedithio)tetrathiafulvalenium (BEDT-TTF) monolayers sandwiched between extended close-packed Keggin-type molecular metal oxide cluster arrays: synthesis, unprecedented acentric structure, and preliminary conducting and e.s.r. properties of (BEDT-TTF)8SiW12O40 , 1989 .

[14]  Lee,et al.  Transition of local moments coupled to itinerant electrons in the quasi one-dimensional conductor, copper phthalocyanine iodide. , 1986, Physical review letters.

[15]  M. T. Pope,et al.  Heteropoly and Isopoly Oxometalates , 1983 .