Some new radical-cation salts based on unsymmetrical tetraheterofulvalenes: (MDTTTF)4Pt(CN)4, the first κ-phase salt, with a square planar dianion

G. A. Mousdis; L. Ducasse; M. Fettouhi; L. Ouahab; E. Dupart; C. Garrigou-Lagrange; J. Amiell; R. Canet; P. Delhaes

doi:10.1016/0379-6779(92)90063-O

Some new radical-cation salts based on unsymmetrical tetraheterofulvalenes: (MDTTTF)₄Pt(CN)₄, the first κ-phase salt, with a square planar dianion

G. A. Mousdis^*
, L. Ducasse
, M. Fettouhi
, L. Ouahab
, E. Dupart
, C. Garrigou-Lagrange
, J. Amiell
, R. Canet
, P. Delhaes

^*Corresponding author for this work

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

11 Scopus citations

Abstract

We report the synthesis of the organic donor radical cations, methylenedithiotetrathiafulvalene (MDTTTF), ethylenedithiotetrathiafulvalene (EDTTTF) and vinylenedithiotetrathiafulvalene (VDTTTF), with the square planar dianions, Pt(CN)₄ and Ni(CN)₄. Among these salts, the κ-(MDTTTF)₄Pt(CN)₄ (CH₂Cl₂) phase constitutes the first κ-phase, produced with a nonlinear dianion. Crystal and electronic structures, electrical and optical properties and ESR measurements have been investigated for these salts. Crystal and electronic structures of κ-(MDTTTF)₄Pt(CN)₄ are similar to those of (MDTTTF)₂AuI₂, which is an ambient pressure superconductor (T_c = 4.5 K). However, d.c. conductivity measurements show a semiconducting behaviour, associated with an ESR linewidth decreasing with temperature in contrast with all other known κ salts. An explanation of the origin of these different behaviours is proposed.

Original language	English
Pages (from-to)	219-229
Number of pages	11
Journal	Synthetic Metals
Volume	48
Issue number	2
DOIs	https://doi.org/10.1016/0379-6779(92)90063-O
State	Published - 1 Jul 1992
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(92)90063-O

Cite this

@article{b154e5b549f94f2ba48a81e3dcce6cd4,

title = "Some new radical-cation salts based on unsymmetrical tetraheterofulvalenes: (MDTTTF)4Pt(CN)4, the first κ-phase salt, with a square planar dianion",

abstract = "We report the synthesis of the organic donor radical cations, methylenedithiotetrathiafulvalene (MDTTTF), ethylenedithiotetrathiafulvalene (EDTTTF) and vinylenedithiotetrathiafulvalene (VDTTTF), with the square planar dianions, Pt(CN)4 and Ni(CN)4. Among these salts, the κ-(MDTTTF)4Pt(CN)4 (CH2Cl2) phase constitutes the first κ-phase, produced with a nonlinear dianion. Crystal and electronic structures, electrical and optical properties and ESR measurements have been investigated for these salts. Crystal and electronic structures of κ-(MDTTTF)4Pt(CN)4 are similar to those of (MDTTTF)2AuI2, which is an ambient pressure superconductor (Tc = 4.5 K). However, d.c. conductivity measurements show a semiconducting behaviour, associated with an ESR linewidth decreasing with temperature in contrast with all other known κ salts. An explanation of the origin of these different behaviours is proposed.",

author = "Mousdis, \{G. A.\} and L. Ducasse and M. Fettouhi and L. Ouahab and E. Dupart and C. Garrigou-Lagrange and J. Amiell and R. Canet and P. Delhaes",

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T1 - Some new radical-cation salts based on unsymmetrical tetraheterofulvalenes

T2 - (MDTTTF)4Pt(CN)4, the first κ-phase salt, with a square planar dianion

AU - Mousdis, G. A.

AU - Ducasse, L.

AU - Fettouhi, M.

AU - Ouahab, L.

AU - Dupart, E.

AU - Garrigou-Lagrange, C.

AU - Amiell, J.

AU - Canet, R.

AU - Delhaes, P.

PY - 1992/7/1

Y1 - 1992/7/1

N2 - We report the synthesis of the organic donor radical cations, methylenedithiotetrathiafulvalene (MDTTTF), ethylenedithiotetrathiafulvalene (EDTTTF) and vinylenedithiotetrathiafulvalene (VDTTTF), with the square planar dianions, Pt(CN)4 and Ni(CN)4. Among these salts, the κ-(MDTTTF)4Pt(CN)4 (CH2Cl2) phase constitutes the first κ-phase, produced with a nonlinear dianion. Crystal and electronic structures, electrical and optical properties and ESR measurements have been investigated for these salts. Crystal and electronic structures of κ-(MDTTTF)4Pt(CN)4 are similar to those of (MDTTTF)2AuI2, which is an ambient pressure superconductor (Tc = 4.5 K). However, d.c. conductivity measurements show a semiconducting behaviour, associated with an ESR linewidth decreasing with temperature in contrast with all other known κ salts. An explanation of the origin of these different behaviours is proposed.

AB - We report the synthesis of the organic donor radical cations, methylenedithiotetrathiafulvalene (MDTTTF), ethylenedithiotetrathiafulvalene (EDTTTF) and vinylenedithiotetrathiafulvalene (VDTTTF), with the square planar dianions, Pt(CN)4 and Ni(CN)4. Among these salts, the κ-(MDTTTF)4Pt(CN)4 (CH2Cl2) phase constitutes the first κ-phase, produced with a nonlinear dianion. Crystal and electronic structures, electrical and optical properties and ESR measurements have been investigated for these salts. Crystal and electronic structures of κ-(MDTTTF)4Pt(CN)4 are similar to those of (MDTTTF)2AuI2, which is an ambient pressure superconductor (Tc = 4.5 K). However, d.c. conductivity measurements show a semiconducting behaviour, associated with an ESR linewidth decreasing with temperature in contrast with all other known κ salts. An explanation of the origin of these different behaviours is proposed.

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DO - 10.1016/0379-6779(92)90063-O

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