Electrical conductivity of 1,4‐dihydroxyanthraquinone and the complex silver/dihydroxyanthraquinone

Abstract

Quinizarin (1,4‐DHAQ) and Ag/I,4‐DHAQ thin films deposited under vacuum were investigated by I–V measurements at various temperatures. It is shown that when submitted to an electric field of 5 × 105 V cm−1 or less, the I‐V characteristics of AI/DHAQ/AI sandwich structures are ohmic. The temperature dependence is I ∝ exp(‐ΔE/kT). The measured activation energy is 0.3 eV in the case of pure DHAQ and 30meV in the case of Ag/DHAQ. Therefore we can imagine that in the former case the conductivity is controlled by thermally activated hopping above intermolecular barriers, while in the latter case the conductivity can be attributed to tunnelling between silver grains.

Structural and Electrical Properties of 1,8-Bis(3-hydroxypropylamino) and 1-(3-Hydroxypropylamino)–9,10-anthraquinone Films

“…[5][6][7] Different functional derivatives of 9,10-anthraquinone have been synthesized and studied by various researchers. [8][9][10][11][12][13] Moreover, the electronic properties of 9,10-anthraquinones are strongly affected by the nature and position(s) of their substituent(s). The increase in electron-donating ability(ies) of the substituent(s) at various positions of 9,10-anthraquinones markedly affects the colour and redox properties of the molecules.…”