Author
Ian M. Bell
Bio: Ian M. Bell is an academic researcher from University College London. The author has contributed to research in topics: Raman spectroscopy & Resonance Raman spectroscopy. The author has an hindex of 4, co-authored 6 publications receiving 819 citations.
Papers
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TL;DR: The Raman spectra of over 60 pigments, both natural and synthetic, known to have been in use before ≈ 1850 AD, have been studied by Raman microscopy.
851 citations
TL;DR: The influence of the pH of the reaction mixture on the nature of zirconia formed from Zirconium(IV) acetate solutions, processed either by boiling under reflux or by hydrothermal methods, has been investigated in this article.
19 citations
TL;DR: In this article, the extent of valence delocalization within the pentacoordinate [M(triphos)(DBCat)]+ fragment, related to the DBCat → M π-donation, has been estimated from the relative intensities of the high-wavenumber Raman peaks attributed to the intra-catecholate ν(C-O), λ(C-)O and ν (C-C) vibrations coupled with the symmetric stretch and/or deformation vibrations of the M(OO
14 citations
TL;DR: In this article, the vibrational force field of the tetrathiosquarate ion (C 4 S 4 2−) was analyzed on the basis of the observed infrared and Raman spectra and ab initio molecular orbital (MO) and density functional (DF) calculations.
12 citations
TL;DR: In this paper, Raman spectra taken at resonance with the eu(Br pπ)→ b2g(Ru dπ) charge transfer (CT) transition of the trans-[RuBr4(MeCN)2] ion, as its [NBu4]+ salt at ca. 80 K, consist of long overtone progressions in ν1(a1g), the symmetric RuBr stretch (at 188.5 cm−1), together with combination band progressions, in which ν 1 is the progression-forming mode and the enabling modes
Abstract: Raman spectra taken at resonance with the eu(Br pπ) → b2g(Ru dπ) charge-transfer (CT) transition of the trans-[RuBr4(MeCN)2]– ion, as its [NBu4]+ salt at ca. 80 K, consist of long overtone progressions in ν1(a1g), the symmetric RuBr stretch (at 188.5 cm–1), together with combination band progressions in which ν1 is the progression-forming mode and the enabling modes include ν2(b1g), νas(RuBr), and ν4(b2g), δs(BrRuBr). The excitation profile of the ν1 band approximately follows the contour of the eu → b2g CT transition referred to above, consistent with the operation of the A-term scattering mechanism. The spectroscopic data allow the determination of the harmonic wavenumber (ω1) and anharmonicity (x11) of the ν1(a1g) mode to be 188.8 cm–1 and –0.15 cm–1, respectively. Some comparative data on the analogous chloride ion, trans-[RuCl4(MeCN)2]–, are also given.
2 citations
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TL;DR: An earlier library of Raman spectra compiled using visible excitation has been extended by the addition of 22 further reference spectra obtained with 780.0, 647.1, 632.8 and/or 514.5 nm excitation.
884 citations
Book•
08 Aug 2001TL;DR: Theory of Raman scattering evolution and revolution of the Raman instrumentation, application of available technologies to spectroscopy and microscopy, and its adaptation to the industrial environment can be found in this paper.
Abstract: Theory of Raman scattering evolution and revolution of Raman instrumentation - application of available technologies to spectroscopy and microscopy Raman spectroscopy and its adaptation to the industrial environment Raman microscopy - confocal and scanning near-field Raman imaging the quest for accuracy in Raman spectra chemometrics for Raman spectroscopy Raman spectra of gases Raman spectroscopy applied to crystals - phenomena and principles, concepts and conventions Raman scattering of glass Raman spectroscopic applications to gemmology Raman spectroscopy on II-IV-semiconductor nanostructures medical applications of Raman spectroscopy - in vivo Raman spectroscopy some pharmaceutical applications of Raman spectroscopy low-frequency Raman spectroscopy and biomolecular dynamics - a comparison between different low-frequency experimental techniques collectivity of vibrational modes Raman spectroscopic studies of ion-ion interactions in aqueous and non-aqueous electrolyte solutions environmental applications of Raman spectroscopy to aqueous solutions Raman and surface enhanced resonance Raman scattering - applications in forensic science application of Raman spectroscopy to organic fibres and films applications of IR and Raman spectra of quasi-elemental carbon process Raman spectroscopy the use of Raman spectroscopy to monitor the quality of carbon overcoats in the disk drive industry Raman spectroscopy in the undergraduate teaching laboratory Raman spectroscopy in the characterization of archaeological materials.
611 citations
TL;DR: This work presents for the first time a catalogue of Raman spectra of minerals that may be found in corroded metal artworks or artefacts, and includes some inorganic pigments that may been found in or on stained glass.
341 citations
TL;DR: This database and the papers from several groupsthat appeared around the same time introduced many people to this research field, and these were not the first applications of Raman microspectroscopy in art analysis.
Abstract: the applicationof this technique in this field has grown exponentially.Although this database and the papers from several groupsthat appeared around the same time introduced many peopleto this research field, these were not the first applications ofRaman microspectroscopy in art analysis. In 1979 Dhamelin-court et al.
323 citations
Book•
15 Feb 2010TL;DR: In this article, the authors discuss the importance of information embedded in the microscopic record in the complete archaeological record, including common mineral components of the archaeological record such as bones and teeth, phytoliths and mollusk shells.
Abstract: 1 Archaeology, archaeological science and microarchaeology 2 Information embedded in the microscopic record 3 Completeness of the archaeological record 4 Common mineral components of the archaeological record 5 Biological materials: bones and teeth 6 Biological materials: phytoliths, diatoms, eggshells, otoliths and mollusk shells 7 Reconstructing pyrotechnological processes 8 Biological molecules and macromolecules: protected niches 9 Ethnoarchaeology of the microscopic record: learning from the present 10 Absolute dating: assessing the quality of a date 11 Reading the microscopic record on-site 12 Infrared spectroscopy in archaeology
301 citations