Photogalvanic behaviour of [Cr2O2S2(1-Pipdtc)2(H2O)2] in aqueous DMF |
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Authors: | Suman Pokhrel KS Nagaraja |
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Affiliation: | Department of Chemistry, Loyola Institute of Frontier Energy (LIFE), Loyola College, Chennai 600 034, India |
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Abstract: | The photogalvanic behaviour of Cr2O2S2(1-Pipdtc)2(H2O)2] was performed in a Honda Cell using 100% DMF and different percentages of water-DMF systems. The maximum potential of 200 mV with 18 μA of current was generated in DMF. The experiments were performed at different pH conditions and added dyes. The system was found to generate a maximum potential of 86, 67 and 36 mV at pH∼4, 7 and 8, respectively, at 65 °C. Malachite green and methylene blue (10−4 M) produced maximum potential of 100 and 82 mV, respectively. The system was reversible when the irradiated solution was aerated immediately. When the solution was kept in dark for a long time (12 h) and then aerated, the solution was found to be irreversible. The Cr(V) is photoreduced to Cr(IV) with the light irradiation and the unstable Cr(IV) reverts to Cr(V) by aerial oxidation. |
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Keywords: | Photogalvanic system Honda cell Photoconversion |
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