101
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Withers JR, Ruschman C, Parkin S, Holmes SM. One- and three-dimensional octacyanometalate(IV) networks constructed via a building block approach: {[trans-NiII(tn)2(OH2)][trans-NiII(μ-NC)2(tn)2][(μ-NC)3MIV(CN)5]·6H2O} (MIV=Mo, W) and Cs4[CuII(OH2)4]2[CuII(NH3)]4[MoIV(CN)8]4·2H2O. Polyhedron 2005. [DOI: 10.1016/j.poly.2005.06.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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102
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Giorgetti M, Berrettoni M, Zamponi S, Kulesza PJ, Cox JA. Cobalt hexacyanoferrate in PAMAM doped silica matrix. 2. Structural and electronic characterization. Electrochim Acta 2005. [DOI: 10.1016/j.electacta.2005.05.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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103
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Escax V, Champion G, Arrio MA, Zacchigna M, Cartier Dit Moulin C, Bleuzen A. The Co Ligand Field: A Key Parameter in Photomagnetic CoFe Prussian Blue Derivatives. Angew Chem Int Ed Engl 2005; 44:4798-801. [PMID: 15988774 DOI: 10.1002/anie.200500647] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Virginie Escax
- Laboratoire de Chimie Inorganique et Matériaux Moléculaires, UMR CNRS 7071, Université Pierre et Marie Curie, Bât. F, 4, place Jussieu, 75252 Paris Cedex 05, France
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104
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Escax V, Champion G, Arrio MA, Zacchigna M, Cartier dit Moulin C, Bleuzen A. The Co Ligand Field: A Key Parameter in Photomagnetic CoFe Prussian Blue Derivatives. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200500647] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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105
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Zhang KL, Shi YJ, You XZ, Yu KB. Preparation, crystal structure and characterization of a novel iron(III) oxide cluster containing two different discrete [Fe3O] units. J Mol Struct 2005. [DOI: 10.1016/j.molstruc.2005.02.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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106
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Gawali-Salunke S, Varret F, Maurin I, Enachescu C, Malarova M, Boukheddaden K, Codjovi E, Tokoro H, Ohkoshi S, Hashimoto K. Magnetic and Mössbauer Investigation of the Photomagnetic Prussian Blue Analogue Na0.32Co[Fe(CN)6]0.74·3.4H2O: Cooperative Relaxation of the Thermally Quenched State. J Phys Chem B 2005; 109:8251-6. [PMID: 16851964 DOI: 10.1021/jp044739x] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Thanks to thermal quenching we investigated the relaxation of the metastable state of Na(0.32)Co[Fe(CN)6](0.74).3.4H2O at low temperature. A self-accelerated process has been observed in agreement with the cooperative character of the system, responsible for the large thermal hysteresis of the charge-transfer-induced spin transition. The mean-field analysis of the relaxation is discussed with respect to the equilibrium properties. A sizable deviation from mean-field behavior is observed at the beginning of the relaxation process, which might be attributed to a preliminary structural relaxation of the quenched state.
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Affiliation(s)
- S Gawali-Salunke
- Laboratoire de Magnétisme et d'Optique, CNRS-Université de Versailles Saint Quentin, 45, Avenue des Etats-Unis, 78035 Versailles Cedex, France
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107
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Dei A. Photomagnetic Effects in Polycyanometallate Compounds: An Intriguing Future Chemically Based Technology? Angew Chem Int Ed Engl 2005; 44:1160-3. [PMID: 15651013 DOI: 10.1002/anie.200461413] [Citation(s) in RCA: 139] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Andrea Dei
- INSTM Research Unit, LAMM Dipartimento di Chimica dell' Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy.
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108
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Dei A. Photomagnetische Effekte in Polycyanometallaten: Entsteht aus chemischer Grundlagenforschung eine interessante zukünftige Technik? Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200461413] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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109
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Toma L, Toma LM, Lescouëzec R, Armentano D, De Munno G, Andruh M, Cano J, Lloret F, Julve M. Synthesis, crystal structures and magnetic properties of cyanide- and phenolate-bridged [MIIINiII]2tetranuclear complexes (M = Fe and Cr). Dalton Trans 2005:1357-64. [PMID: 15824772 DOI: 10.1039/b500168b] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The binuclear complex NiII2L(H2O)2(ClO4)2(1) and the neutral tetranuclear bimetallic compounds [{M(III)(phen)(CN)4}2{NiII2L(H2O)2}].2CH3CN with M=Fe (2) and Cr (3)[H2L=11,23-dimethyl-3,7,15,19-tetraazatricyclo[19.3.1.1(9,13)]hexacosa-2,7,9,11,13(26),14,19,21(25),22,24-decaene-25,26-diol] have been synthesized and the structures of and determined by single crystal X-ray diffraction. and are isostructural compounds whose structure is made up of centrosymmetric binuclear cations [Ni2(L)(H2O)2]2+ and two peripheral [M(phen)(CN)4]- anions [M=Fe (2) and Cr (3)] acting as monodentate ligands towards the nickel atoms through one of their four cyanide nitrogen atoms. The environment of the metal atoms in 2 and 3 is six-coordinated: two phen-nitrogen and four cyanide-carbon atoms at the iron and chromium atoms and a water molecule, one cyanide-nitrogen and two phenolate-oxygens and two imine-nitrogens from the binucleating ligand L2- at the nickel atom build distorted octahedral surroundings. The values of the FeNi and CrNi separations through the single cyanide bridge are 5.058(1) and 5.174(2)A respectively, whereas the Ni-Ni distances across the double phenolate bridge are 3.098(2)(2) and 3.101(1) A (3). The magnetic properties of have been investigated in the temperature range 1.9-290 K. The magnetic behaviour of corresponds to that of an antiferromagnetically coupled nickel(II) dimer with J=-61.0(1) cm-1, the Hamiltonian being defined as H=-J S(A).S(B). An overall antiferromagnetic behaviour is observed for and with a low-lying singlet spin state. The values of the intramolecular magnetic couplings are J(Fe-Ni)=+17.4(1) cm-1 and J(Ni-Ni(a))=-44.4(1) cm-1 for and J(Cr-Ni)=+11.8(1) cm-1 and J(Ni-Ni(a))=-44.6(1) cm-1 for [H=-J(M-Ni)(S(M).S(Ni)+S(Ma).S(Nia))-J(Ni-Nia)S(Ni)S(Nia)]. Theoretical calculations using methods based on density functional theory (DFT) have been employed on in order to analyze the efficiency of the exchange pathways involved and also to substantiate the exchange coupling parameters.
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Affiliation(s)
- Liviu Toma
- Departament de Química Inorgànica/Instituto de Ciencia Molecular, Facultat de Química de la Universitat de València, Dr. Moliner 50, 46100, Burjassot València, Spain
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110
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111
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The structure, photo-induced magnetization and correlation of the cyano-bridged two-dimensional hetero-bimetallic compounds. J SOLID STATE CHEM 2005. [DOI: 10.1016/j.jssc.2004.10.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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112
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Toma L, Lescouëzec R, Vaissermann J, Herson P, Marvaud V, Lloret F, Julve M. [Criii(L)(CN)4]−: a new building block in designing cyanide-bridged 4,2-ribbon-like chains {[Criii(L)(CN)4]2Mn(H2O)2}·nH2O [L = 2-aminomethylpyridine (n = 6) and 1,10-phenanthroline (n = 4)]. NEW J CHEM 2005. [DOI: 10.1039/b413473g] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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113
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SATO O. Photoinduced magnetization in molecular compounds. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2004. [DOI: 10.1016/j.jphotochemrev.2004.10.001] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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114
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Toma L, Lescouëzec R, Vaissermann J, Delgado FS, Ruiz-Pérez C, Carrasco R, Cano J, Lloret F, Julve M. Nuclearity Controlled Cyanide-Bridged Bimetallic CrIII-MnIICompounds: Synthesis, Crystal Structures, Magnetic Properties and Theoretical Calculations. Chemistry 2004; 10:6130-45. [PMID: 15515063 DOI: 10.1002/chem.200400611] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The preparation, X-ray crystallography and magnetic investigation of the compounds PPh4[Cr(bipy)(CN)4].2 CH3CN.H2O (1) (mononuclear), [[Cr(bipy)(CN)4]2Mn-(H2O)4].4H2O (2) (trinuclear), [[Cr(bipy)(CN)4]2Mn(H2O)2] (3) (chain) and [[Cr(bipy)(CN)4]2Mn(H2O)].H2O.CH3CN (4) (double chain) [bipy=2,2'-bipyridine; PPh4 (+)=tetraphenylphosphonium] are described herein. The [Cr(bipy)(CN)4]- unit act either as a monodentate (2) or bis-monodentate (3) ligand toward the manganese atom through one (2) or two (3) of its four cyanide groups. The manganese atom is six-coordinate with two (2) or four (3) cyanide nitrogens and four (2) or two (3) water molecules building a distorted octahedral environment. In 4, two chains of 3 are pillared through interchain Mn-N-C-Cr links which replace one of the two trans-coordinated water molecules at the manganese atom to afford a double chain structure where bis- and tris-monodenate coordination modes of [Cr(bipy)(CN)4]- coexist. The magnetic properties of 1-4 were investigated in the temperature range 1.9-300 K. A Curie law behaviour for a magnetically isolated spin quartet is observed for 1. A significant antiferromagnetic interaction between CrIII and MnII through the single cyanide bridge [J=-6.2 cm(-1), the Hamiltonian being defined as H=-J(SCr1.SMn+SCr2.SMn] occurs in 2 leading to a low-lying spin doublet which is fully populated at T <5 K. A metamagnetic behaviour is observed for 3 and 4 [the values of the critical field Hc being ca. 3000 (3) and 1500 Oe (4)] which is associated to the occurrence of weak interchain antiferromagnetic interactions between ferrimagnetic Cr2III MnII chains. The analysis of the exchange pathways in 2-4 through DFT type calculations together with the magnetic bevaviour simulation using the quantum Monte Carlo methodology provided a good understanding of their magnetic properties.
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Affiliation(s)
- Luminita Toma
- Departament de Química Inorgànica/Instituto de Ciencia Molecular, Facultat de Química de la Universitat de València, Avda. Dr. Moliner 50, 46100 Burjassot, València, Spain
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115
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Li G, Sato O, Akitsu T, Einaga Y. Visible light-induced magnetization change of the cyano-bridged 3d–4f heterobimetallic. J SOLID STATE CHEM 2004. [DOI: 10.1016/j.jssc.2004.06.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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116
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Zhang KL, Wang Z, Huang H, Zhu Y, You XZ. Synthesis, crystal structure and magnetic properties of a novel dinuclear cobalt(II) complex based on the mixed N- and O-donor ligands: [Co2(pyrazine)(fumarato)2(H2O)8]·7H2O. J Mol Struct 2004. [DOI: 10.1016/j.molstruc.2004.03.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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117
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Synthesis and characterization of a new iron(III) oxide cluster containing two different discrete [Fe 3 O] units: [Fe 3 O(O 2 CCH CH CH 3 ) 6 (H 2 O) 3 ][Fe 3 O(O 2 CCH CH H 3 ) 7 (H 2 O) 2 ] (HO 2 CCH CH CH 3 ) 4 (OH)(H 2 O). INORG CHEM COMMUN 2004. [DOI: 10.1016/j.inoche.2004.02.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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118
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Li G, Akitsu T, Sato O, Einaga Y. Photoinduced Magnetization of the Cyano-Bridged 3d−4f Heterobimetallic Assembly Nd(DMF)4(H2O)3(μ-CN)Fe(CN)5·H2O (DMF = N,N-Dimethylformamide). J Am Chem Soc 2003; 125:12396-7. [PMID: 14531668 DOI: 10.1021/ja037183k] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Photoinduced magnetization of the cyano-bridged 3d-4f heterobimetallic assembly Nd(DMF)4(H2O)3(mu-CN)Fe(CN)5.H2O (1) (DMF = N,N-dimethylformamide) is described in this paper. The chiMT values are enhanced by about 45% after UV light illumination in the temperature range of 5-50 K. We propose that UV light illumination induces a structural distortion in 1. This small structural change is propagated by molecular interactions in the inorganic network. Furthermore, the cooperativity resulting from the molecular interaction functions to increase the activation energy of the relaxation processes, which makes observation of the photoexcited state possible. The flexible network structure through the hydrogen bonds in 1 plays an essential role for the photoinduced phenomenon. This finding may open up a new domain for developing the molecule-based magnetic materials.
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Affiliation(s)
- Guangming Li
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
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119
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Escax V, Cartier dit Moulin C, Villain F, Champion G, Itié JP, Münsch P, Verdaguer M, Bleuzen A. Photo-induced electron transfer in ferrimagnetic Prussian-blue analogues XIxCo4[Fe(CN)6]y (XI = alkali cation). CR CHIM 2003. [DOI: 10.1016/j.crci.2003.06.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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120
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Sato O, Hayami S, Einaga Y, Gu ZZ. Control of the Magnetic and Optical Properties in Molecular Compounds by Electrochemical, Photochemical and Chemical Methods. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2003. [DOI: 10.1246/bcsj.76.443] [Citation(s) in RCA: 139] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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121
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Spectroelectrochemistry of palladium hexacyanoferrate films on platinum substrates. J Electroanal Chem (Lausanne) 2003. [DOI: 10.1016/s0022-0728(03)00081-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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122
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Photomagnetism in CxCo4[Fe(CN)6](8+x)/3·n H2O Prussian blue analogues: looking for the maximum photo-efficiency. CR CHIM 2003. [DOI: 10.1016/s1631-0748(03)00043-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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123
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Varret F, Salunke SA, Boukheddaden K, Bousseksou A, Codjovi É, Enachescu C, Linares J. The Ising-like model applied to switchable inorganic solids: discussion of the static properties. CR CHIM 2003. [DOI: 10.1016/s1631-0748(03)00048-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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124
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Dönnecke D, Imhof W. The formation of cis- and trans-[Ru(CN)2(CNtBu)4] by reductive cleavage of isocyanide ligands; isomer separation by supramolecular interactions with various solvents. Dalton Trans 2003. [DOI: 10.1039/b304199a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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125
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Lescouëzec R, Vaissermann J, Lloret F, Julve M, Verdaguer M. Ferromagnetic coupling between low- and high-spin iron(III) ions in the tetranuclear complex fac-[[FeIII[HB(pz)3](CN)2(mu-CN)]3FeIII(H2O)3]* 6H2O ([HB(pz)3]- = hydrotris(1-pyrazolyl)borate). Inorg Chem 2002; 41:5943-5. [PMID: 12425618 DOI: 10.1021/ic020374o] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The novel mononuclear PPh4-fac-[FeIII[HB(pz)3](CN)3]*H2O (1) [PPh4+= tetraphenylphosphonium cation; (HB(pz)3)- = hydrotris(1-pyrazolyl)borate] and tetranuclear fac-[[FeIII[HB(pz)3](CN)2(mu-CN)]3FeIII(H2O)3]*6H2O (2) have been prepared and characterized by X-ray diffraction analysis. Crystal data for compound 1: monoclinic, space group P21/c, a = 9.575(3) A, b = 21.984(4) A, c = 16.863(3) A, beta = 100.34(2) degrees, U = 3486(1) A3, Z = 4. Crystal data for compound 2: orthorhombic, space group Pnam, a = 14.084(3) A, b = 14.799(4) A, c = 25.725(5) A, U = 5362(2) A3, Z = 4. Compound 1 is a low-spin iron(III) compound with three cyanide ligands in fac arrangement and a tridentate pyrazolylborate ligand building a distorted octahedral environment around the iron atom. Compound 2 is the first example of a molecular species containing three peripheral low-spin iron(III) ions linked to a central high-spin iron(III) cation by single cyanide bridges, the anion of 1 acting as a monodentate ligand in 2. Variable-temperature magnetic susceptibility measurements of 2 reveal the occurrence of a significant ferromagnetic coupling between the three peripheral low-spin iron(III) centers and the central high-spin iron(III) ion cations leading to a low-lying nonet spin state.
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Affiliation(s)
- Rodrigue Lescouëzec
- Departament de Química Inorgànica/Instituto de Ciencia Molecular, Facultat de Química de la Universitat de València, Dr. Moliner 50, 46100-Burjassot, València, Spain
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126
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Lezna RO, Romagnoli R, de Tacconi NR, Rajeshwar K. Cobalt Hexacyanoferrate: Compound Stoichiometry, Infrared Spectroelectrochemistry, and Photoinduced Electron Transfer. J Phys Chem B 2002. [DOI: 10.1021/jp013991r] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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127
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Podgajny R, Desplanches C, Sieklucka B, Sessoli R, Villar V, Paulsen C, Wernsdorfer W, Dromzée Y, Verdaguer M. Pentanuclear octacyanotungstate(V)-based molecule with a high spin ground state S= (13/2). Inorg Chem 2002; 41:1323-7. [PMID: 11874372 DOI: 10.1021/ic010679n] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert Podgajny
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Krakow, Poland
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128
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Shimamoto N, Ohkoshi SI, Sato O, Hashimoto K. Control of charge-transfer-induced spin transition temperature on cobalt-iron Prussian blue analogues. Inorg Chem 2002; 41:678-84. [PMID: 11849066 DOI: 10.1021/ic010915u] [Citation(s) in RCA: 399] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The electronic and spin states of a series of Co-Fe Prussian blue analogues containing Na(+) ion in the lattice, Na(x)()Co(y)()Fe(CN)(6) x zH(2)O, strongly depended on the atomic composition ratio of Co to Fe (Co/Fe) and temperature. Compounds of Co/Fe = 1.5 and 1.15 consisted mostly of the Fe(III)(t(2g)(5)e(g)(0), LS, S = 1/2)-CN-Co(II)(t(2g)(5)e(g)(2), HS, S = 3/2) site and the Fe(II)(t(2g)(6)e(g)(0), LS, S = 0)-CN-Co(III)(t(2g)(6)e(g)(0), LS, S = 0) site, respectively, over the entire temperature region from 5 to 350 K. Conversely, compounds of Co/Fe = 1.37, 1.32, and 1.26 showed a change in their electronic and spin states depending on the temperature. These compounds consisted mainly of the Fe(III)-CN-Co(II) site (HT phase) around room temperature but turned to the state consisting mainly of the Fe(II)-CN-Co(III) site (LT phase) at low temperatures. This charge-transfer-induced spin transition (CTIST) phenomenon occurred reversibly with a large thermal hysteresis of about 40 K. The CTIST temperature (T(1/2) = (T(1/2) descending + T(1/2) ascending)/2) increased from 200 to 280 K with decreasing Co/Fe from 1.37 to 1.26. Furthermore, by light illumination at 5 K, the LT phase of compounds of Co/Fe = 1.37, 1.32, and 1.26 was converted to the HT phase, and the relaxation temperature from this photoproduced HT phase also strongly depended on the Co/Fe ratio; 145 K for Co/Fe = 1.37, 125 K for Co/Fe = 1.32, and 110 K for Co/Fe = 1.26. All these phenomena are explained by a simple model using potential energy curves of the LT and HT phases. The energy difference of two phases is determined by the ligand field strength around Co(II) ions, which can be controlled by Co/Fe.
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Affiliation(s)
- Naonobu Shimamoto
- Research Center for Advanced Science and Technology, The University of Tokyo, Komaba 4-6-1, Meguroku, Tokyo 153-8904, Japan
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129
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Zhang J, Matsushita MM, Kong XX, Abe J, Iyoda T. Photoresponsive coordination assembly with a versatile logs-stacking channel structure based on redox-active ligand and cupric ion. J Am Chem Soc 2001; 123:12105-6. [PMID: 11724627 DOI: 10.1021/ja0111030] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J Zhang
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo 192-0397, Japan
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130
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Gu ZZ, Einaga Y, Sato O, Fujishima A, Hashimoto K. Photo- and Dehydration-Induced Charge Transfer Processes Accompanied with Spin Transition on CoFe(CN)5NH3·6H2O. J SOLID STATE CHEM 2001. [DOI: 10.1006/jssc.2001.9177] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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131
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Ohkoshi SI, Hashimoto K. Photo-magnetic and magneto-optical effects of functionalized metal polycyanides. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2001. [DOI: 10.1016/s1389-5567(01)00011-9] [Citation(s) in RCA: 137] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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132
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Goujon A, Varret F, Escax V, Bleuzen A, Verdaguer M. Thermo-chromism and photo-chromism in a Prussian blue analogue. Polyhedron 2001. [DOI: 10.1016/s0277-5387(01)00616-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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133
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Smékal Z, Kameníček J, Svoboda I, Escuer A. Synthesis, Crystal Structure and Magnetic Properties of Novel Complex [μ-(NC)-Fe(CN)3(NO)-μ-(CN)-Cu(ept)]n·4nH2O (ept = N-(2-Aminoethyl)propane-1,3-diamine). ACTA ACUST UNITED AC 2001. [DOI: 10.1135/cccc20011490] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The novel complex [μ-(NC)-Fe(CN)3(NO)-μ-(CN)-Cu(ept)]n·4nH2O (ept = N-(2-aminoethyl)- propane-1,3-diamine) was obtained by the reaction of Cu(ClO4)2·6H2O with N-(2-amino- ethyl)propane-1,3-diamine and Na2[Fe(CN)5NO]·2H2O in water. This compound was characterized by IR, UV-VIS and EPR spectroscopies and magnetic measurement. Single-crystal X-ray structure analysis revealed that the title complex has a one-dimensional polymeric structure containing hexacoordinate iron(II) with five cyanide ligands (two of them, in trans position, bridging) and one nitrosyl group, and pentacoordinate copper(II) with N-(2-aminoethyl)propane-1,3-diamine and two sites occupied by bridging cyanide ligands. Magnetic investigation revealed a very weak antiferromagnetic interaction between the copper atoms (superexchange interaction parameter J = -1.7(1) cm-1; H = -JSiSi+1) within the chain through the diamagnetic [Fe(CN)5NO]2- ions.
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