0000000000548060

AUTHOR

Benilde F.o. Costa

showing 2 related works from this author

Klimt artwork: red-pigment material investigation by backscattering Fe-57 Mössbauer spectroscopy, SEM and p-XRF

2017

Material tests were performed on a rediscovered Klimt-artwork "Trompetender Putto". We performed studies on the red colored spots, mainly taken from non-restored parts. MIMOS II Fe-57 Mossbauer spectroscopy (novelty in art-pigment analysis) mainly reveals haematite and crystallized goethite in red colors. Electron microscopy can identify various layers of the original and overpainting of an artwork. The number of layers fluctuates between three and four chemically painted areas. The portable X-ray fluorescence analysis enables to reduce the pigment list to containing mercury (cinnabar), lead, zinc, iron and titanium. Infrared-light-irradiation visualizes the different age of the pigments.

Dewey Decimal Classification::500 | Naturwissenschaften::540 | ChemieArcheologyGoethiteMaterials scienceScanning electron microscopepigmentsAnalytical chemistryinfra-red-light investigationchemistry.chemical_elementZinc01 natural sciencesKlimt: “Trompetender Putto”PigmentMaterialcharakterisierung0103 physical sciencesMössbauer spectroscopy0601 history and archaeologyddc:750lcsh:CC1-960010306 general physics060102 archaeologyTrompetender PuttoMössbauer spectroscopy06 humanities and the artsDewey Decimal Classification::700 | Künste Bildende Kunst allgemein::750 | MalereiOverpaintingKlimt GustavDewey Decimal Classification::700 | Künste Bildende Kunst allgemeinCinnabarchemistryPigmentvisual_artddc:540visual_art.visual_art_mediumddc:660lcsh:ArchaeologyX-ray fluorescence analysisddc:700660 Technische Chemiescanning electron microscopyTitanium
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Iron(III) Complexes on a Dendrimeric Basis and Various Amine Core Investigated by Mössbauer Spectroscopy

2014

Dendrimers of various generations were synthesized by the divergent method. Starting from various amine cores (G0a, G0b, G0c) the generations were built by reaction of the amine with acrylnitrile followed by hydrogenation with DIBAL-H. Treatment with salicylaldehyde creates a fivefold coordination sphere for iron in the molecular periphery. The resulting multinuclear coordination compounds are investigated by Mossbauer spectroscopy.

chemistry.chemical_classificationHistoryCoordination sphereInorganic chemistryComputer Science ApplicationsEducationCoordination complexchemistry.chemical_compoundchemistrySalicylaldehydeDendrimerMössbauer spectroscopyPolymer chemistryAmine gas treatingJournal of Physics: Conference Series
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