Syntheses and properties of genuine organic magnetic conductors: (1:1) and (1:2) salts of ethyl-pyridinium-substituted verdazyl radicals with TCNQ

Genuine organic magnetic semiconductors: electrical and magnetic properties of the TCNQ and iodide salts of methylpyridinium-substituted verdazyl radicals

“…Recently, we prepared the 1 : 1 and 1 : 2 salts of p-and m-ethylpyridinium-substituted verdazyl radical cation with TCNQ anion, and found that the 1 : 2 salts are organic magnetic semiconductors. 26 The results obtained are similar to those in the present work. The crystal structure analyses of salts ( 5) and (6) will be necessary to clarify the mechanism of the electron conduction.…”

Semiconductive 2D arrays of pancake-bonded oligomers of partially charged TCNQ radicals

“…In many structures, isolated pancake-bonded dimers (which form no stacking interaction with neighbouring molecules) are present (Keller et al, 1981;Harms et al, 1982;Abashev et al, 1987;Miller et al, 1987;O'Hare et al, 1990;Stein et al, 1991;Grossel & Weston, 1992;Chen et al, 2008;Sutton et al, 2016;Park et al, 2018). Sometimes the dimers form 1D stacks similar to those of semiquinones (Hoekstra et al, 1972;Ashwell et al, 1975aAshwell et al, , 1977aBosch & Bodegom, 1977;Endres et al, 1978,b;Diezt et al, 1981;Konno & Saito, 1981;Waclawek et al, 1983;Visser et al, 1990a,b,c,d,e;Magonov et al, 1991;Ballester et al, 1997;Moore et al, 2001;Mukai et al, 2001;Nishimura et al, 2002;Chen et al, 2008;Qu et al, 2011;Martin et al, 2012;Lu et al, 2017;U ¨ngo ¨r et al, 2021a), but also planar 2D arrays have been described (Ashwell et al, 1982(Ashwell et al, , 1983Bryce et al, 1988;Brook & Koch, 1997;Radva ´kova ´et al, 2010;Qu et al, 2011); in some of these structures the formal charge (i.e. charge derived from stoichiometry) of TCNQ is À1/2 (Ashwell et al, 1977a(Ashwell et al, , 1982.…”

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.…”