Electron Transport and Magnetic Properties of New Highly Conducting TCNQ Complexes

Perlstein, Jerry; Walatka, Vernon; Cowan, Dwaine O.; Candela, G. A.

doi:10.1063/1.2946825

Cited by 17 publications

(6 citation statements)

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“…For example, in the electrochemical growth of TTF-TCNQ, the A-methylquinolinium ion of 39 plays no electrochemical role and thus in principle A-methylphenazinium tetracyanoquinodimethan (40) or lithium tetracyanoquinodimethan (35) should be equally effective, whereas in fact they give much poorer crystals. In contrast Li+TCNQBr2•- (41) seems to give better TTF-TCNQBr2 crystals than do ammonium salts. In all cases the platinum electrodes must be soaked in nitric acid and then used to electrolyze 10% Na2S04 before the crystals will adhere.…”

Section: Introductionmentioning

confidence: 79%

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Synthesis of electrically conductive organic solids

Wheland¹,

Gillson²

1976

J. Am. Chem. Soc.

311

116

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Section: Introductionmentioning

confidence: 79%

“…Found: C, 34.00; , 1.31; C, 34.14; , 1.10. Lithium 2,6-Dibromo-7,7,8,8-tetracyanoquinodimethanide (41). A solution of 1 g of 2,6-dibromo-7,7,8,8-tetracyanoquinodimethane in 400 ml of refluxing acetonitrile was treated with 1.12 g of lithium iodide in 25 ml of refluxing acetonitrile.…”

Section: Methodsmentioning

confidence: 99%

Synthesis of electrically conductive organic solids

Wheland¹,

Gillson²

1976

J. Am. Chem. Soc.

311

116

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“…The dc electrical conductivity of tetrathiafulvaienium -tetracyanotiuinodimethanide (TTF-TCNQ) was first reported by Ferraris, Cowan, Walatka, and Perlstein' in 1972. Since that time a number of workers have carefully studied the conductivity in this organic charge-transfer salt. Although the results are not in complete agreement and measurements are continuing in some groups, we would like to summarize the substantial body of work that has been completed.…”

Section: Jeromementioning

confidence: 99%

Electrical conductivity of tetrathiafulvalenium-tetracyanoquinodimethanide (TTF-TCNQ)

et al. 1976

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New measurements of electrical conductivity along the b axis of tetrathiafulvalenium-tetracyanoquinodimethanide (TTF-TCNQ) are combined with published results to provide a comprehensive summary including approximately 600 samples studied at 18 different laboratories. The magnitudes of these measured conductivities do not necessitate the assumption of superconducting fluctuations or any other collective state in which the conductivity exceeds the limitations of single-particle scattering. Since an adequate theory of the limitations of single-particle scattering for TTF-TCNQ does not exist at present, experiment alone does not rule out the possibility that collective effects may somewhat enhance or suppress the conductivity.The dc electrical conductivity of tetrathiafulvaienium -tetracyanotiuinodimethanide (TTF-TCNQ) was first reported by Ferraris, Cowan, Walatka, and Perlstein' in 1972. Since that time a number of workers have carefully studied the conductivity in this organic charge-transfer salt. Although the results are not in complete agreement and measurements are continuing in some groups, we would like to summarize the substantial body of work that has been completed. The observed magnitude of the conductivity appears to be com-parable to that in common metals and thus, from the limited point of view of an effective mean free path, consistent with a possible contribution to the transport properties from single-particle electron scattering.The original results of Ferraris etal. indicated that TTF-TCNQ was the most highly conducting organic compound known. Its dc conductivity rose with decreasing temperature like a metal and was highly anisotropic. The observed anisotropy was consistent with the crystal structure of other 13 5105

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“…The most well-known example is TTF–TCNQ (TTF = tetrathiafulvalene; TCNQ = 7,7,8,8-tetracyanoquinodimethane) which is the first organic conductor presenting a metallic behaviour in a wide temperature range. 1 To obtain metallic conductivity in such CT salts, several criteria should be fulfilled. First, the key parameter is the degree of CT ( ρ ), which depends on the balance between the cost of ionizing a DA pair and the electrostatic (Madelung) energy gain of the ionic lattice.…”

Section: Introductionmentioning

confidence: 99%