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Citation: LI Yun-Long, XIE Qing-Ji, YAO Shou-Zhuo. Electrodeposition of Dihydroxybenzene Charge-transfer Complexes on Au Electrodes in Aqueous HClO₄ Monitored by EQCM[J]. Chinese Journal of Applied Chemistry, ;2007, 24(6): 628-631. shu

Electrodeposition of Dihydroxybenzene Charge-transfer Complexes on Au Electrodes in Aqueous HClO₄ Monitored by EQCM

1.
Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education), Hunan Normal University, Changsha 410081

Corresponding author: XIE Qing-Ji,
Received Date: 1 July 2006
Available Online: 20 October 2006
Fund Project: 国家自然科学基金(30300041,20675029)资助项目 (30300041,20675029)湖南省教育厅重点项目(05A036)资助 (05A036)

Cyclic voltammetric oxidation of pyrocatechin,hydroquinone and resorcinol in aqueous HClO₄ was investigated for examination of the possible formation of charge-transfer complex (CTC) via electrochemical quartz crystal microbalance (EQCM) technique.CTC deposition occurred in HClO₄ solutions containing pyrocatechin or hydroquinone of high concentrations,while resorcinol only polymerized under the same conditions.With the pyrocatechin system as an example,the effects of potential-sweep rate and concentrations of pyrocatechin and HClO₄ were examined.FTIR data also supported the CTC formation of the pyrocatechin system.We also found that the addition of large-sized heparin sodium influenced significantly the CTC deposition.With the increase of heparin mass concentration,the CTC deposition was first enhanced significantly and then inhibited,and the turning point was at 0.05 g/L heparin.The EQCM as a fast,convenient and sensitive tool is highly recommended for CTC-deposition investigations including the monitoring and screening during CTC syntheses.
- electrochemical quartz crystal microbalance (EQCM),
- charge-transfer complex (CTC),
- pyrocatechin,
- hydroquinone,
- resorcinol
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Electrodeposition of Dihydroxybenzene Charge-transfer Complexes on Au Electrodes in Aqueous HClO4 Monitored by EQCM

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Electrodeposition of Dihydroxybenzene Charge-transfer Complexes on Au Electrodes in Aqueous HClO₄ Monitored by EQCM