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Time-resolved and 2-dimensional NIR FT-Raman spectroscopy
Zitatschlüssel ISI:A1993LX76000027
Autor Schrader, B and Baranovic, G and Epding, A and Hoffmann, G G and Vankan, J and Keller, S and Hildebrandt, P and Lehner, C and Sawatzki, J
Seiten 1452-1456
Jahr 1993
ISSN 0003-7028
Adresse PO BOX 1438, FREDERICK, MD 21701
Journal Applied spectroscopy
Jahrgang 47
Nummer 9
Monat SEP
Notiz INTERNATIONAL SYMP ON ADVANCED INFRARED SPECTROSCOPY : DEVELOPMENT AND APPLICATION OF TIME-RESOLVED AND 2-DIMENSIONAL INFRARED SPECTROSCOPY ( AIRS-1 ), TOKYO, JAPAN, MAR 23-25, 1993
Verlag SOC APPLIED SPECTROSCOPY
Organisation SPECTROSCOP SOC JAPAN; SOC POLYM SCI JAPAN; CHEM SOC JAPAN; JAPAN SOC ANAL CHEM; PHYS SOC JAPAN; JAPAN SOC APPL PHYS; OGASAWARA FDN PROMOT SCI & ENGN; INOUE FDN SCI; ASAHI GLASS FDN
Zusammenfassung The near-infrared Fourier transform (NIR FT) Raman technique permits the measurement of Raman spectra without interference by fluorescence. Absorption by molecules containing X-H bonds in the NIR range requires a 180-degrees scattering geometry. In this way, Raman spectroscopy of samples on surfaces is possible, both the detecting of small spots and the mapping of the sample distribution over larger areas. The spatial resolution extends into the micrometer range. Mapping of the inorganic pigment distribution of an initial letter of a mediaeval manuscript is demonstrated. For time-resolved measurements, the step-scan technique, previously developed for infrared spectroscopy, may be used in NIR FT-Raman spectroscopy as well. It allows the study of photochemical and photophysical processes, the application of modulation techniques, and the investigation of `'noisy'' samples. Photo-isomerization of the dye merocyanine 540 has been observed with the step-scan technique upon periodic excitation with a flash lamp.
Typ der Publikation Proceedings Paper
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