Highly conducting charge-transfer compounds of tetrathiafulvalene and transition metal-"dmit" complexes

Development of Conductive Organic Molecular Assemblies: Organic Metals, Superconductors, and Exotic Functional Materials

“…pressure and becomes superconducting below 1.62 K under 0.7 GPa, have a charge of +0.8. 640 There are many SÁÁÁS atomic contacts between TTF and Ni(dmit) 2 columns. The band calculation including the HOMO and LUMO of Ni(dmit) 2 indicates a small 2D pocket at around the À point, which seems to suppress the Peierls instability.…”

Structures of tetramethylammonium bis(2-thioxo-1,3-dithiole-4,5-dithiolato)niccolate(III) andtetra-n-propylammonium bis(2-thioxo-1,3-dithiole-4,5-dithiolato)niccolate(III)

“…Transition-metal ions coordinated by the anionic ligand dmit (2-thioxo-l,3-dithiole-4,5-dithiolate) are known to yield compounds which are highly anisotropic (low-dimensional) metals or semiconductors (Kato, Mori, Kobayashi, Sasaki & Kobayashi, 1984). An isotropic superconductor with dmit has also been described (Bousseau, Valade, Legros, Cassoux, Garbauskas & Interrante, 1986). This compound consists of planar [Ni(dmit)2]"-anionic units (n = 1,2) and open-shell cations, tetrathiafulvalene (TTF).…”

Propriedades elétricas e magnéticas de novos compostos com o ânion condutor [Ni(dmit)2]- e radicais magnéticos nitronil nitróxido

“…Isso possibilita uma atrativa geração de novos dispositivos eletrônicos 4 com aplicações como sensores químicos 5 , transistores 6 e óptica não-linear 7 . Como exemplo pode-se citar o primeiro supercondutor molecular contendo um complexo de metal de transição, o [TTF][Ni(dmit) 2 ] 2 (TTF = tetratiofulvaleno) com supercondutividade a 1,62 K a 7 kbar 8 . Nakamura e colaboradores 9 apresentaram o composto [TPP][Ni(dmit) 2 ] 3 (TPP = tetrafenilfosfônio) com a estequiometria 1:3, condutividade de 10 S cm -1 a 300 K e semicondutividade em baixas temperaturas.…”