Identification of naphthoquinonic and anthraquinonic dyes via sequential potential steps applied to the voltammetry of microparticles methodology

Doménech‐Carbó, Antonio; Doménech‐Carbó, María Teresa; Calisti, Marina; Maiolo, Vincenzo

doi:10.1007/s10008-009-0899-x

Cited by 18 publications

(12 citation statements)

References 59 publications

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“…[66][67][68][69][70] Such processes involve obvious modifications in the molecular structure but also significant changes in the intermolecular hydrogen bonding system, which plays an important role in the cohesion of the solids. In most anthraquinonic and flavonoid dyes, this electrochemistry is based on quinone/ catechol redox interconversions.…”

Section: Pigment Depositsmentioning

confidence: 99%

“…When no potential was applied to the substrate (Fig. At this poten- tial, several anthraquinonic and flavonoid pigments are oxidized [66][67][68][69][70] so that the topographic changes can be associated with the regions where grains of such pigments are located within the paint layer. When a potential of +0.40 V was applied to the substrate (Fig.…”

Section: Paper Analystmentioning

confidence: 99%

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Screening and mapping of pigments in paintings using scanning electrochemical microscopy (SECM)

Doménech‐Carbó

Silva

et al. 2015

Analyst

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The use of the scanning electrochemical microscopy (SECM) technique for identifying and mapping of both organic and inorganic pigments in sub-microsamples from pictorial specimens is described. This methodology, inspired by the voltammetry of immobilized particles technique, permits the study of textural properties of paint layers and mapping the distribution of pigment grains upon application of different potentials to the substrate. A combination of the redox competition SECM strategy with voltammetry yields a local identification methodology for different organic and inorganic pigments in paint samples.

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Section: Pigment Depositsmentioning

confidence: 99%

Section: Paper Analystmentioning

confidence: 99%

Screening and mapping of pigments in paintings using scanning electrochemical microscopy (SECM)

Doménech‐Carbó

Silva

et al. 2015

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“…The strategies include, apart from the variation in electrochemical conditions (technique, parameters such as potential scan rate in cyclic voltammetry or frequency in square-wave voltammetry, etc.) the sequential use of different electrolytes [202] or the application of constant polarization steps prior to electrochemical runs [203]. The combination of these strategies permits the definition of analytical sequences to identify different components between closely related families [204].…”

Section: Analytical Strategiesmentioning

confidence: 99%

Electroanalytical chemistry for the analysis of solids: Characterization and classification (IUPAC Technical Report)

Doménech‐Carbó

Labuda

Scholz

2012

Pure and Applied Chemistry

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155

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Solid state electroanalytical chemistry (SSEAC) deals with studies of the processes, materials, and methods specifically aimed to obtain analytical information (quantitative elemental composition, phase composition, structure information, and reactivity) on solid materials by means of electrochemical methods. The electrochemical characterization of solids is not only crucial for electrochemical applications of materials (e.g., in batteries, fuel cells, corrosion protection, electrochemical machining, etc.) but it lends itself also for providing analytical information on the structure and chemical and mineralogical composition of solid materials of all kinds such as metals and alloys, various films, conducting polymers, and materials used in nanotechnology. The present report concerns the relationships between molecular electrochemistry (i.e., solution electrochemistry) and solid state electrochemistry as applied to analysis. Special attention is focused on a critical evaluation of the different types of analytical information that are accessible by SSEAC.

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“…As far as much compounds in vegetal matter, lignins in particular , are sparingly soluble in water, solid state electrochemical oxidations can take place. Here, the ingress/issue of electrons on/from the solid is coupled, by reasons of charge conservation, to the ingress/issue of protons on/from the solid lattice as evidenced by coupled AFM/VIMP studies .…”

Section: Resultsmentioning

confidence: 97%

“…The solution‐phase and solid‐state electrochemistry of different families of polyphenolic compounds has been widely studied. In the case of flavonoids, the main oxidative pathway consisted of a two‐electron, two‐proton oxidation of the 3’,4’‐dihydroxy acid moiety yielding the corresponding o ‐quinone (see Supplementary Information, Figure S.5).…”

Section: Resultsmentioning

confidence: 99%

Access to Phylogeny from Voltammetric Fingerprints of Seeds: the Asparagus Case

et al. 2016

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1IntroductionIntersection of electrochemistryw ith vegetal matterh as av ariety of aspects.A part from the electrochemical determinationo fb ioactivec ompounds [1],c ontaminants [2,3] and antioxidant capacities [4][5][6][7],r ecognizing growth conditions and type of plants [8] and varietal discrimination of fruits [9] and leaves [10] have been reported. Conversely,v egetal matter can be used for electrode modification [11],e lectrochemical sensing [12,13] and as as upport for electrode modification [ 14,15].Electrochemical methods have as ignificant place in biological and environmentala nalyses. Much of electroanalytical methodsa re devotedt ot he determination of selected natural products in biological samples.T hese approaches,b ased on solution-phase electrochemistry, involve different types of modifiede lectrodes in order to achieve the levelso fs ensitivity and selectivity demanded by the individual analytest ob ed etermined in the presence of complex biological matrices [16][17][18][19].Itispossible, however, aiming av ariety of analytical targets which are based on the recordo ft he global electrochemicalr esponse of biological systems without determination of individual analytes [20,21].I nt his context, we have recently described the application of the voltammetry of immobilized particles (VIMP),asolid state electrochemical technique developed by Scholz et al. whichp rovidesa nalytical data on sparingly soluble solids [22][23][24],f or acquiring phylogenetici nformationb ased on the record of the "electrochemical fingerprint"d ue to the electroactive compounds existing in plantl eaves [20][21].H ere,w e presenta ne xpansiono ft his electrochemolomic approach focused on two objectives:i )r ecognition of the presence of characteristic voltammetric fingerprints at different taxonomic levels (family,g enus,s pecies), and ii) testing the possibility of discriminating different genetic linesw ithin different species of the same genus,i nb oth cases using the voltammetric response of seed extracts. Them ain objective was to test the hypothesis that the chemical composition of seed extracts should be less sensitive to local environmental factors and hence much more representative of geneticd ifferences,t han that of leaf extractsp reviously studied [20,21],i no rder to apply electrochemical data in phylogenetic studies.Molecularp hylogenyp lays an essential role in contemporary botany.P hylogenetic trees,t raditionally basedo n morphological/functional features,a re mainly derived fromg enetica nalysis mostly based in the identificationo f nucleotide sequences of nuclear and chloroplast regions [25].I ns everalc ases,c himeric nucleotide sequences are obtained so that discrepancies between molecular and morphological/functional classifications appear [26][27][28][29].Abstract:Am ethodology for characterizing vegetal taxonomic groupsf rom the voltammetric fingerprintso fp olyphenolic components of seeds is described. It is based on recording the voltammetric response of microparticulate films depositedo ng lassy...

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Identification of naphthoquinonic and anthraquinonic dyes via sequential potential steps applied to the voltammetry of microparticles methodology

Cited by 18 publications

References 59 publications

Screening and mapping of pigments in paintings using scanning electrochemical microscopy (SECM)

Screening and mapping of pigments in paintings using scanning electrochemical microscopy (SECM)

Electroanalytical chemistry for the analysis of solids: Characterization and classification (IUPAC Technical Report)

Access to Phylogeny from Voltammetric Fingerprints of Seeds: the Asparagus Case

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