Conductive films of tetrathiafulvalene dicarboxylate cation radicals and poly(vinyl alcohol) formed by casting |
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| Affiliation: | 1. Department of Chemistry, Middle East Technical University, TR-06800 Ankara, Turkey;2. Atilim Optoelectronic Materials and Solar Energy Laboratory (ATOMSEL), Department of Chemical Engineering and Applied Chemistry, Atilim University, TR-06830 Ankara, Turkey;1. Faculty of Pharmacy, IFTM University, Moradabad (Uttar Pradesh) – 244102, India;2. School of Pharmacy, ITM University, Gwalior (Madhya Pradesh) – 474001, India;3. School of Pharmacy & Technology Management, SVKM''s NMIMS (Deemed to be University), Shirpur, Distt - Dhule (Maharashtra) – 425405, India |
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| Abstract: | Aqueous solutions of dipotassium tetrathiafulvalene dicarboxylate (1), potassium ferricyanide and poly(vinyl alcohol) were used to cast air-stable, flexible and electrically conductive films. Casting at 80–95 °C formed a network of microcrystals oriented in the film plane. Spectroscopic studies showed that these crystals contain π-stacks of the cation radical 1+. No evidence for mixed valence stacks was found. A film containing 5 wt.% of 1+ in PVA had a four-point conductivity σ = 10−2 S cm−1 in the film plane. The structural anisotropy led to a lower conductivity (10−4 S cm−1) across the plane of the film. |
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