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RESEARCH PRODUCT
Redox tuning and species distribution in Maya Blue-type materials: a reassessment.
José-vicente Gimeno-adelantadoFrancisco M. Valle-algarraMaría Teresa Doménech-carbóAntonio Doménech-carbóMarcelo E. DomineLaura Osete-cortinasubject
Isatingas chromatography mass spectrometryMagnesium CompoundsMass spectrometryIndigo CarmineUPLC-MSIndigoMass Spectrometrychemistry.chemical_compoundScanning electrochemical microscopyMagnesium SilicatesmedicineElectrochemistryHumansGeneral Materials ScienceKaolinChromatography High Pressure LiquidMaya BlueChromatographyChemistryIsatinSilicon CompoundsPalygorskitevoltammetry of microparticlesDielectric spectroscopyMontmorillonitePINTURABentoniteGas chromatography–mass spectrometryOxidation-Reductionmedicine.drugNuclear chemistryChromatography Liquiddescription
Maya Blue-type specimens prepared from indigo (1 wt %) plus kaolinite, montmorillonite, palygorskite, sepiolite, and silicalite are studied. Liquid chromatography with diode array detection, ultra-performance liquid chromatography coupled with mass spectrometry, and pyrolysis-silylation gas chromatography-mass spectrometry analyses of the extracts from these specimens combined with spectral and solid-state voltammetry, electrochemical impedance spectroscopy, and scanning electrochemical microscopy techniques provide evidence for the presence of a significant amount of dehydroindigo and isatin accompanying indigo and other minority organic compounds in all samples. Solid-state electrochemistry data permits the estimatation of indigo loading in archeological Maya Blue, which is in the range of 0.2 to 1.5 wt %. These results support a view of 'genuine' Maya Blue-type materials as complex polyfunctional organic-inorganic hybrids.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-08-01 | ACS applied materialsinterfaces |