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Electrocoagulation of Quinone Pigments
Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
Department of Chemistry, Faculty of Science, Maejo University, Chiang Mai, 50292, Thailand
Department of Chemistry, Faculty of Science, Silpakorn University, Nakhon Pathom, 73000, Thailand
* Authors to whom correspondence should be addressed.
Received: 12 June 2006; in revised form: 9 July 2006 / Accepted: 12 July 2006 / Published: 14 July 2006
Abstract: Some representative quinones, viz. one naphthoquinone (plumbagin) and five anthraquinones (alizarin, purpurin, chrysazin, emodin, and anthrarufin), were subjected to electrocoagulation. It was found that the rate and extent of coagulation of these compounds appears to correlate with the number and relative position of their phenolic substituent groups, and that all of the coagulated quinones could be recovered. Attempts were then made to electrochemically isolate three quinones, namely plumbagin, morindone and erythrolaccin, from natural sources.
Keywords: Electrocoagulation; quinones; naphthoquinones; anthraquinones; phenolic compounds; alizarin; purpurin; chrysazin; emodin; anthrarufin; plumbagin; morindone; erythrolaccin; seedlac; Plumbago rosea; Morinda angustifolia
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Chairungsi, N.; Jumpatong, K.; Suebsakwong, P.; Sengpracha, W.; Phutdhawong, W.; Buddhasukh, D. Electrocoagulation of Quinone Pigments. Molecules 2006, 11, 514-522.
Chairungsi N, Jumpatong K, Suebsakwong P, Sengpracha W, Phutdhawong W, Buddhasukh D. Electrocoagulation of Quinone Pigments. Molecules. 2006; 11(7):514-522.
Chairungsi, Neeranuch; Jumpatong, Kanlaya; Suebsakwong, Patiwat; Sengpracha, Waya; Phutdhawong, Weerachai; Buddhasukh, Duang. 2006. "Electrocoagulation of Quinone Pigments." Molecules 11, no. 7: 514-522.