Band structures and physical properties of new organic salts based on unsymmetrical donors and square planar dianions

L. Ducasse; G. Mousdis; M. Fettouhi; L. Ouahab; J. Amiell; P. Delhaes

doi:10.1016/0379-6779(93)90361-Y

Band structures and physical properties of new organic salts based on unsymmetrical donors and square planar dianions

L. Ducasse^*
, G. Mousdis
, M. Fettouhi
, L. Ouahab
, J. Amiell
, P. Delhaes

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Several organic salts based on the organic radical cations, MDTTTF (methylenedithion-tetrathifulvalene), EDTTTF (ethylenedithio-tetrathifulvalene) and EDOEDTTTF (ethylenedioxo-ethylenedithio-tetrathiafulvalene), have been prepared with the square planar dianions, M(CN)₄ (M=Pt, Pd). We have determined their crystal structures and their crystal structures and their physical properties (conductivity and ESR). The inclusion of solvent molecules in the crystal favors one-dimensional polymers built on the M(CN)₄ anions and the solvent. This situation, which is found in the MDTTTF salts, is reminiscent of the crystal packing in the superconducting salt, (BEDTTTF)₄Pt(CN)₄H₂O. It is important to note that the (MDTTTF)₄Pt(CN)₄ salts are the first κ-phase observed in such materials. The salts based on the EDTTTF molecule belong to the β-phase. The transport and magnetic properties of these compounds are contrasted. (MDTTTF)₄Pt(CN)₄(CH₂Cl₂)₂ exhibits a quasi metallic behavior down to 170K where a broad metal-semiconductor regime change is detected. The temperature dependence of the ESR line4ewidth of (EDTTTF)₄Pt(CN)₄(H₂O)₂ does not ehibit any phase transition down to 4K, while a metal to insulator transition occurs in (EDTTTF)₄Pd(CN)₄-(H₂O)₂ at 100K. The Pt and Pd salts of EDOEDTTTF are very similar and the poor quality of the crystals prevents any analysis for T<20K. Finally, the transfer integrals and band structures have been calculated in order to analyse these different behaviors.

Original language	English
Pages (from-to)	1995-2000
Number of pages	6
Journal	Synthetic Metals
Volume	56
Issue number	1
DOIs	https://doi.org/10.1016/0379-6779(93)90361-Y
State	Published - 29 Mar 1993
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/0379-6779(93)90361-Y

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@article{53f79f80951848f98e9a167fdb7fb549,

title = "Band structures and physical properties of new organic salts based on unsymmetrical donors and square planar dianions",

abstract = "Several organic salts based on the organic radical cations, MDTTTF (methylenedithion-tetrathifulvalene), EDTTTF (ethylenedithio-tetrathifulvalene) and EDOEDTTTF (ethylenedioxo-ethylenedithio-tetrathiafulvalene), have been prepared with the square planar dianions, M(CN)4 (M=Pt, Pd). We have determined their crystal structures and their crystal structures and their physical properties (conductivity and ESR). The inclusion of solvent molecules in the crystal favors one-dimensional polymers built on the M(CN)4 anions and the solvent. This situation, which is found in the MDTTTF salts, is reminiscent of the crystal packing in the superconducting salt, (BEDTTTF)4Pt(CN)4H2O. It is important to note that the (MDTTTF)4Pt(CN)4 salts are the first κ-phase observed in such materials. The salts based on the EDTTTF molecule belong to the β-phase. The transport and magnetic properties of these compounds are contrasted. (MDTTTF)4Pt(CN)4(CH2Cl2)2 exhibits a quasi metallic behavior down to 170K where a broad metal-semiconductor regime change is detected. The temperature dependence of the ESR line4ewidth of (EDTTTF)4Pt(CN)4(H2O)2 does not ehibit any phase transition down to 4K, while a metal to insulator transition occurs in (EDTTTF)4Pd(CN)4-(H2O)2 at 100K. The Pt and Pd salts of EDOEDTTTF are very similar and the poor quality of the crystals prevents any analysis for T<20K. Finally, the transfer integrals and band structures have been calculated in order to analyse these different behaviors.",

author = "L. Ducasse and G. Mousdis and M. Fettouhi and L. Ouahab and J. Amiell and P. Delhaes",

year = "1993",

month = mar,

day = "29",

doi = "10.1016/0379-6779(93)90361-Y",

language = "English",

volume = "56",

pages = "1995--2000",

journal = "Synthetic Metals",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Band structures and physical properties of new organic salts based on unsymmetrical donors and square planar dianions

AU - Ducasse, L.

AU - Mousdis, G.

AU - Fettouhi, M.

AU - Ouahab, L.

AU - Amiell, J.

AU - Delhaes, P.

PY - 1993/3/29

Y1 - 1993/3/29

N2 - Several organic salts based on the organic radical cations, MDTTTF (methylenedithion-tetrathifulvalene), EDTTTF (ethylenedithio-tetrathifulvalene) and EDOEDTTTF (ethylenedioxo-ethylenedithio-tetrathiafulvalene), have been prepared with the square planar dianions, M(CN)4 (M=Pt, Pd). We have determined their crystal structures and their crystal structures and their physical properties (conductivity and ESR). The inclusion of solvent molecules in the crystal favors one-dimensional polymers built on the M(CN)4 anions and the solvent. This situation, which is found in the MDTTTF salts, is reminiscent of the crystal packing in the superconducting salt, (BEDTTTF)4Pt(CN)4H2O. It is important to note that the (MDTTTF)4Pt(CN)4 salts are the first κ-phase observed in such materials. The salts based on the EDTTTF molecule belong to the β-phase. The transport and magnetic properties of these compounds are contrasted. (MDTTTF)4Pt(CN)4(CH2Cl2)2 exhibits a quasi metallic behavior down to 170K where a broad metal-semiconductor regime change is detected. The temperature dependence of the ESR line4ewidth of (EDTTTF)4Pt(CN)4(H2O)2 does not ehibit any phase transition down to 4K, while a metal to insulator transition occurs in (EDTTTF)4Pd(CN)4-(H2O)2 at 100K. The Pt and Pd salts of EDOEDTTTF are very similar and the poor quality of the crystals prevents any analysis for T<20K. Finally, the transfer integrals and band structures have been calculated in order to analyse these different behaviors.

AB - Several organic salts based on the organic radical cations, MDTTTF (methylenedithion-tetrathifulvalene), EDTTTF (ethylenedithio-tetrathifulvalene) and EDOEDTTTF (ethylenedioxo-ethylenedithio-tetrathiafulvalene), have been prepared with the square planar dianions, M(CN)4 (M=Pt, Pd). We have determined their crystal structures and their crystal structures and their physical properties (conductivity and ESR). The inclusion of solvent molecules in the crystal favors one-dimensional polymers built on the M(CN)4 anions and the solvent. This situation, which is found in the MDTTTF salts, is reminiscent of the crystal packing in the superconducting salt, (BEDTTTF)4Pt(CN)4H2O. It is important to note that the (MDTTTF)4Pt(CN)4 salts are the first κ-phase observed in such materials. The salts based on the EDTTTF molecule belong to the β-phase. The transport and magnetic properties of these compounds are contrasted. (MDTTTF)4Pt(CN)4(CH2Cl2)2 exhibits a quasi metallic behavior down to 170K where a broad metal-semiconductor regime change is detected. The temperature dependence of the ESR line4ewidth of (EDTTTF)4Pt(CN)4(H2O)2 does not ehibit any phase transition down to 4K, while a metal to insulator transition occurs in (EDTTTF)4Pd(CN)4-(H2O)2 at 100K. The Pt and Pd salts of EDOEDTTTF are very similar and the poor quality of the crystals prevents any analysis for T<20K. Finally, the transfer integrals and band structures have been calculated in order to analyse these different behaviors.

UR - https://www.scopus.com/pages/publications/0027555117

U2 - 10.1016/0379-6779(93)90361-Y

DO - 10.1016/0379-6779(93)90361-Y

M3 - Article

AN - SCOPUS:0027555117

SN - 0379-6779

VL - 56

SP - 1995

EP - 2000

JO - Synthetic Metals

JF - Synthetic Metals

IS - 1

ER -

Band structures and physical properties of new organic salts based on unsymmetrical donors and square planar dianions

Abstract

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