Fine tuning of π-stack separation distances of semiquinone radicals affects their magnetic and electric properties (CROSBI ID 230807)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Molčanov, Krešimir ; Stilinović, Vladimir ; Šantić, Ana ; Maltar-Strmečki, Nadica ; Pajić, Damir ; Kojić-Prodić, Biserka
engleski
Fine tuning of π-stack separation distances of semiquinone radicals affects their magnetic and electric properties
Two salts of tetrachloro- (chloranil, Cl4Q) and tetrabromosemiquinone (bromanil, Br4Q) radical anions with an organic cation N- methylpyridinium (N-MePy), displaying a variety of tunable electrical and magnetic properties, are characterized. These systems comprise π- stacks of equidistant semiquinone radical anions, without Peierls deformation and diamagnetic spin coupling. Both are stable up to 150 and 120°C in air, respectively, and are semiconductors with conductivities of 10-6 – 10-7 (Ohm cm)-1 in the single crystals. The room-temperature concomitant crystallization of two polymorphs with different magnetic properties (antiferromagnetic and Peierls- distorted diamagnetic) has been observed for Cl4Q∙N-MePy. The semiquinone radical organic salts represent a novel class of potential (multi)functional materials with tunable properties.
semiquinone ; crystal engineering ; spin coupling ; Peierls deformation ; semiconductivity
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Podaci o izdanju
16 (9)
2016.
4777-4782
objavljeno
1528-7483
1528-7505
10.1021/acs.cgd.6b00675