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Molecules 2006, 11(7), 514-522; doi:10.3390/11070514

Electrocoagulation of Quinone Pigments

1
Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
2
Department of Chemistry, Faculty of Science, Maejo University, Chiang Mai, 50292, Thailand
3
Department of Chemistry, Faculty of Science, Silpakorn University, Nakhon Pathom, 73000, Thailand
*
Authors to whom correspondence should be addressed.
Received: 12 June 2006 / Revised: 9 July 2006 / Accepted: 12 July 2006 / Published: 14 July 2006
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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 Electrocoagulation; quinones; naphthoquinones; anthraquinones; phenolic compounds; alizarin; purpurin; chrysazin; emodin; anthrarufin; plumbagin; morindone; erythrolaccin; seedlac; Plumbago rosea; Morinda angustifolia
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Chairungsi, N.; Jumpatong, K.; Suebsakwong, P.; Sengpracha, W.; Phutdhawong, W.; Buddhasukh, D. Electrocoagulation of Quinone Pigments. Molecules 2006, 11, 514-522.

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