Surface-enhanced Raman spectroscopy spectra of Mexican dyestuffs (pages 1551–1559)
Edgar Casanova-González, Angélica García-Bucio, José Luis Ruvalcaba-Sil, Víctor Santos-Vasquez, Baldomero Esquivel, Tatiana Falcón, Elsa Arroyo, Sandra Zetina, María Lorena Roldán and Concepción Domingo
Version of Record online: 11 AUG 2012 | DOI: 10.1002/jrs.4086
From the wide variety of Mexican dyes, only a handful had been studied at length. In this work, carminic acid, cochineal (Dactylopius coccus), achiote (Bixa orellana), muitle (Justicia spicigera), zacatlaxcalli (Cuscuta sp.), brazilwood (Caesalpinia echinata), and cempazuchitl (Tagetes erecta) SERS spectra were recorded in aqueous solution and directly on dyed wool fibers, using silver colloids as SERS substrate. In the case of cempazuchitl, muitle, and zacatlaxcalli, these are probably the first reported Raman spectra of such plants.