| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1504126 | Solid State Sciences | 2015 | 6 Pages |
•Temperature dependence of electrical conductivity of crystals has maximum.•Molecules composing the crystals undergo redox-isomeric interconversion.•Maximum of conductivity is inside of temperature interval of redox-isomeric interconversion.•Conductivity of crystals at high temperature slope after maximum falls to “zero”.•Drop of relative conductivity of crystals reaches 10% per degree.
A study of the temperature dependences of electrical conductivity of crystalline and thin-film samples of о-semiquinonato complexes of cobalt (2,2′-bpy)Co(3,6-DBSQ)2 (complex 1) and (1,10-phen)Co(3,6-DBSQ)2 (complex 2) is reported; where 3,6-DBSQ is 3,6-di-tert-butyl-benzoquinone-1,2. It was shown that the electrical conductivity of samples having amorphous, polycrystalline and monocrystalline structure depends on temperature in the range 150–400 K in a different way. The abrupt drop of conductivity (up to 10% per a degree) was observed in crystalline samples in the region of phase transition (270–310 K for complex 1 and 140–230 K for complex 2). It makes such materials promising for design of uncooled matrix bolometers.
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