Surface-enhanced Raman scattering study of the anthraquinone red pigment carminic acid

Cañamares, María Vega; Garcı́a-Ramos, José Vicente; Domingo, Concepción; Sánchez-Cortés, Santiago

doi:10.1016/j.vibspec.2005.08.002

Cited by 102 publications

(126 citation statements)

References 21 publications

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“…According to these results, the relationship of these forms can change with the dye concentration and induce inversions of intensity, as weakening or enhancement of bands. 33,34 In our spectra, the relative intensity of the band at 1425 cm 1 is notably increased, corresponding to a strong contribution of the dianionic form with two deprotonations. This result suggests that when the dye molecule is absorbed on the metal surface, the interaction induces deprotonation of OH groups at positions 1 and 2.…”

Section: Pink Lake Pigments From Greco-roman Periodmentioning

confidence: 64%

Micro‐Raman spectroscopy (MRS) and surface‐enhanced Raman scattering (SERS) on organic colourants in archaeological pigments

Elslande

Lecomte

Hô

2008

J Raman Spectroscopy

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Direct identification of organic colourants in heterogeneous matrices of cultural heritage objects with very little or no sampling remains a challenging analytical task. A Raman procedure was investigated for the direct identification of archaeological organic-coloured pigments found in works of art, without solvent extraction. Conventional micro-Raman spectroscopy (MRS) using different excitations and surface-enhanced Raman scattering (SERS) were tested on microscopic samples of paints and cosmetics containing dyes from different sources (animal or vegetal). A tiny lump of purple pigment discovered during excavations in the ancient Minoan city of Akrotiri, on the SantoriniIsland in Greece (1650 B.C.) and Greco-Roman pink cosmetics were studied. In some cases the results were compared with a range of lake pigments made in the laboratory following historical recipes.

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Section: Pink Lake Pigments From Greco-roman Periodmentioning

confidence: 64%

Micro‐Raman spectroscopy (MRS) and surface‐enhanced Raman scattering (SERS) on organic colourants in archaeological pigments

Elslande

Lecomte

Hô

2008

J Raman Spectroscopy

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“…that provide the best SERS spectra. Most of the studies refer to red and yellow dyestuffs, mainly anthraquinones (AZ, [15,16] purpurin (PUR), [15] carminic acid, [22] laccaic acid [23] ) and flavonoids, [24 -27] respectively, but significant studies of the SERS spectra of curcumin [28] and some alkaloids [29,30] have also been reported. In some of these studies, theoretical predictions of the corresponding spectra, which help in the assignment of the experimental data, were also made.…”

Section: Introductionmentioning

confidence: 99%

“…In some of these studies, theoretical predictions of the corresponding spectra, which help in the assignment of the experimental data, were also made. Different SERS substrates have been employed, mostly silver colloids reduced with citrate, [14,15,17 -19,21 -34] hydroxylamine [16,22,23,28] or borohydride. [33] But other substrates have been tested as well: electrodes, [13,26] Ag-Al 2 O 3 35 , Tollens mirrors, [31,35] vacuum-evaporated silver nano-island films (AgIF), [31,36] e-beam-deposited AgIF, [37] silver films over nanospheres (AgFON), [38] and Ag nanoparticles obtained in situ by laser photoreduction.…”

Section: Introductionmentioning

confidence: 99%

Extractionless non‐hydrolysis surface‐enhanced Raman spectroscopic detection of historical mordant dyes on textile fibers

Jurasekova

Puerto

Brunò

et al. 2010

J Raman Spectroscopy

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Alizarin and carminic acid have been detected in reference wool and linen fibers dyed with madder and cochineal, respectively, through surface-enhanced Raman scattering (SERS) measurements carried out directly on the fiber, without previous hydrolysis of the mordant-dye complex. For such purpose, Ag nanoparticles were produced and immobilized in situ via the laser photoreduction of a silver nitrate aqueous solution in contact with the fiber. Control SERS spectra of pure dyes (alizarin, purpurin and carminic acid, as well as of mixtures of the first two) on similar Ag nanoparticles were also obtained. The method has been applied to one archeological Coptic textile (6th-8th A.D.) of Egyptian origin, where alizarin has been clearly identified. Other mordant dyes of the flavonoids family (luteolin, apigenin and flavonols) have also been identified by the same SERS method in wool fibers dyed with natural plants, mainly used in Central and South America (Dyer's greenweed, old fustic, onion and chilca) following pre-Columbian dying recipes.

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“…At neutral pH (pH 7), the CA −2 anion is formed, whose absorption peak is 558 nm. Finally, at very basic pH (pH 13), the CA −3 anion is formed, which has two absorption peaks: 530 nm and 566 nm [26].…”

Section: Methodsmentioning

confidence: 99%

Dye-Sensitized Solar Cells Prepared with Mexican Pre-Hispanic Dyes

Sánchez-García

Bokhimi

Martinez

et al. 2018

Journal of Nanotechnology

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A dye-sensitized solar cell (DSSC) is a photovoltaic device capable of generating electrical power from the absorption of solar radiation.ese cells use a SnO 2 : F/TiO 2 /dye heterojunction as the active electrode (working electrode). Active electrodes containing TiO 2 in the anatase crystalline phase and synthetic dyes are used to achieve high conversion efficiencies. Synthetic dyes, whether organic or organometallic compounds, have the disadvantage of being expensive. For this reason, many efforts are made worldwide to find natural dyes with lower production costs that can be used in the fabrication of DSSCs. Nocheztli is a natural red dye obtained from the cochineal insect Dactylopius coccus; the dye dates from pre-Hispanic times and contains high levels of carminic acid (CA). Nocheztli has been used in Mexico in textile dyeing from pre-Hispanic times to the present. Carmine is an organometallic dye with two molecules of carminic acid and one atom of aluminum in its structure; it is obtained by the interaction of the carminic acid from Nocheztli with aluminum salts. Carminic acid and carmine molecules contain a carboxyl group in their structure, allowing them to anchor to TiO 2 , creating a suitable heterojunction to prepare DSSCs. In this study, both dyes are used to sensitize the mesoporous TiO 2 m semiconductor to prepare DSSCs.

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Surface-enhanced Raman scattering study of the anthraquinone red pigment carminic acid

Cited by 102 publications

References 21 publications

Micro‐Raman spectroscopy (MRS) and surface‐enhanced Raman scattering (SERS) on organic colourants in archaeological pigments

Micro‐Raman spectroscopy (MRS) and surface‐enhanced Raman scattering (SERS) on organic colourants in archaeological pigments

Extractionless non‐hydrolysis surface‐enhanced Raman spectroscopic detection of historical mordant dyes on textile fibers

Dye-Sensitized Solar Cells Prepared with Mexican Pre-Hispanic Dyes

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