Electrocoagulation of Quinone Pigments

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.

In vitro screening for anthelmintic and antitumour activity of ethnomedicinal plants from Thailand

“…The pure compound, plumbagin, a naphthoquinone purified from root of Plumbago indica by Chairungsi et al (2006), was kindly provided to be used in this study by Professor Duang Buddhasukh from the Organic Chemistry Laboratory, Department of Chemistry, Faculty of Science, Chiang Mai University.…”