Effect of positional disorder of anions on the conduction mechanism of the one-dimensional conductors (TTF)(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">BF</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mn>0.02</mml:mn></mml:mrow><

Mizuno, Masagi; Gotoh, Midori; Honda, Kazumasa; Shibuya, Isao; Aoki, Katsutoshi

doi:10.1103/physrevb.51.6237

Cited by 5 publications

(10 citation statements)

References 25 publications

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“…Thermal hysteresis in SCN 2 and SeCN 2 salts So far, every SCN series conductor has shown a large thermal hysteresis below room temperature down to 130 K (SCN/NO 3 , SCN/ClO 4 ) or 100 K (SCN/Cl). 13 This phenomenon appeared repeatedly in each thermal cycle except for one salt, (TTF)(SCN) 0.47 (NO 3 ) 0.10 . 15 For this sample the thermal hysteresis disappeared after experiencing the first thermal cycle down to 50 K.…”

Section: Vrh Conduction Of the Disordered Saltsmentioning

confidence: 94%

“…A chloride ion that appeared seems to have derived from the 1,2-dichloroethane employed as the solvent. This solvent always brings chloride ions into the grown crystal as a partner of the mixed anions 13 (method 1, see Table 1).…”

Section: Experimental Preparationmentioning

confidence: 99%

“…The crystal structure was analyzed for the seven of the currently identified 21 mixed anion TTF conductors. They were (TTF)(Cl) 0.42 (ClO 4 ) 0.14 , 12 (TTF)(Cl) 0.60 (BF 4 ) 0.02 , 13 (TTF)(Cl) 0.66 (SCN) 0.09 , 13 (TTF)(Cl) 0.28 (NO 3 ) 0.59 , 16 (TTF)(SC-N) 0.47 (NO 3 ) 0.10 , 15 (TTF)(SCN) 0.12 (Cl) 0.57 , and (TTF)(Se-CN) 0.26 (Cl) 0.43 . All of them have a tetragonal lattice and space group P4 2 /mnm and are isostructural to each other except (TTF)(Cl) 0.28 (NO 3 ) 0.59 , which has an orthorhombic lattice and space group Pnnm.…”

Section: Crystal Structures Of Mixed Anion Saltsmentioning

confidence: 99%

“…The crystal structure of (TTF)(SeCN) 0.26 (Cl) 0.43 was found to have structural data very close to those of (TTF)-(SCN) 0.09 (Cl) 0.66 which have appeared elsewhere. 13 Table 4 summarizes these crystal data, while Table 5 lists atomic coordinates and B eq of (TTF)(SeCN) 0.26 (Cl) 0.43 .…”

Section: Crystal Structures Of Mixed Anion Saltsmentioning

confidence: 99%

“…4 in our earlier report. 13 Structural analysis of the salt (TTF)(SeCN) 0.26 (Cl) 0.43 has shown that the electron density is localized at two sites along the anion lattice in the unit cell, (0,½,0) and (0,½, J) as shown in Table 5. Exclusive assignment of a Se or Cl atom to these peaks did not lead to a conversion in the least square calculations.…”

Section: Crystal Structures Of Mixed Anion Saltsmentioning

confidence: 99%

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Preparation, structure and conduction properties of SeCN-containing mixed anion TTF conductors

2001

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Six new mixed anion salts of tetrathiafulvalene (TTF, C 6 H 4 S 4 ) containing SeCN were prepared electrochemically. Their chemical compositions were found to be (TTF) (SeCN) x (Y) y , where Y was a small inorganic anion with 0.5vxzyv1.0, similar to other mixed anion salts reported so far. The temperature dependence of the dc conductivity of these salts has revealed that the anions are less disordered in the crystal lattice than in SCN analogues. They behave as typical one-dimensional conductors with various degrees of anion order. It was shown that the anion disorder in position and orientation has decisive effects on the conductivity as well as on the conduction mechanism of the TTF chains.Scheme 1 Chemical formula of mixed anion TTF conductors. X, Y are small inorganic anions with 0.5vxzyv1.0.{The IUPAC name for dmbit is 2-thioxo-1,3-benzodithiole-5,6dithiolate.

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Section: Vrh Conduction Of the Disordered Saltsmentioning

confidence: 94%

Section: Experimental Preparationmentioning

confidence: 99%