Structure and properties of novel M(dmit)2 salts with the Me3N+­TEMPO cation radical (Me3N+­TEMPO = N,N,N­trimethyl(1­oxyl­2,2,6,6­tetramethylpiperidin­4­yl)ammonium)

A novel BEDT-TTF-based purely organic magnetic conductor, α - (BEDT - TTF)2(TEMPO - N(CH3)COCH2SO3) ⋅ 3H2O

“…Therefore many researchers have introduced organic radicals in organic conducting salts. For example, charge-transfer (CT) salts of free radical substituted organochalcogen donors [7][8][9][10][11][12][13][14][15][16], CT complexes of free radicals and acceptors [17][18], CT salts of free radical substituted cations and acceptors [19][20][21][22][23], have been reported.…”

STRUCTURE AND PROPERTIES OF M(dmit) 2 SALTS WITH Me 3 N + -TEMPO OR TTF-(HO)TEMPO

“…These values are similar to that obtained for the salt with the octahedral PF 6 À anion (y ¼ À0.2 K) and much weaker than that in (Me 3 N-TEMPO)I salt (y ¼ À6.3 K). (Me 3 N-TEMPO)ClO 4 was found to be isostructural (Figure 1; Pnma, a ¼ 11.170(5) Å , b ¼ 10.650(5) Å , c ¼ 13.264 (5) Å ), and shows similar antiferromagnetic-coupled chain (2J=k B ¼ À0.24 K) as in with (Me 3 N-TEM-PO)PF 6 (a ¼ 11.400(1) Å , b ¼ 10.852(1) Å , c ¼ 13.354 (2) Å ; 2J=k B ¼ À0.26 K) [6].…”

“…The Me 3 N þ -TEMPO salts with X ¼ I À and PF 6 À show different structure and magnetic properties, i.e., both antiferromagnetic but strongly coupled dimer for (Me 3 N-TEMPO)I, weakly coupled chain for (Me 3 N-TEMPO)PF 6 [6]. Thus, solid-state properties of these salts can be controlled by a chemical modification of its counter anion, which can be readily available by metathesis reaction of (Me 3 N-TEMPO)I with the potassium or silver salt of the corresponding anion.…”

“…salt is a semi-conductor (E a ¼ 0.12 eV with rather high single-crystal conductivity (4 Â 10 À3 S cm À1 at room temperature) for a mono-valent salt [6]. Magnetic properties of this salt and the further oxidized (Me 3 N-TEMPO)[M(dmit) 2 ] x (M ¼ Ni, Pd; x > 2) salts were obtained for poorly characterized phases.…”

Organic Multifunctional Spin Systems Based on Aminoxyl Radicals

“…Namely, TEMPO radicals or verdazyl radicals act as donors to form CT complexes, which are isolated as solid substances. [11] A relatively high room-temperature conductivity has been found in the 1:1 salt with [Ni(dmit) 2 ], the 1:2 salt with [Ni(dmit) 2 ], and the 1:4 salt with [Pd(dmit) 2 ] (where dmit is 1,3-dithiole-2-thione-4,5-dithiolate) ranging from 4 10 ±3 S cm ±1 for the former salt to about 1 10 ±2 S cm ±1 for the latter two salts. [10] The electrical conductivity observed in each CT complex at room temperature ranges from 1.40 10 ±2 S cm ±1 to 3.95 10 ±5 S cm ±1 , which is in sharp contrast to other aminoxyl-based CT complexes, which have conductivities below 10 ±6 S cm ±1 .…”