title: Non-destructive Raman analyses--polyacetylenes in plants.
abstract: Ferdinand Bohlmann has described the isolation, the identification and the structure elucidation of acetylene compounds in many plants, and confirmed it by its synthesis. We have recorded the Raman spectra of most of these plants non-destructively by FT-Raman spectroscopy using radiation at 1064 nm. We could not observe any interfering fluorescence. We found acetylene compounds in some plants, even distinct compounds with different concentration in various parts of it. The distribution of the different compounds over the plant can be observed and their changes during the ontogenesis can be followed by a FT-Raman mapping technique. Of special help is a library of Raman and IR spectra and the structure of the compounds, synthesized by Bohlmann. Thus, the Raman technique allows analyses in a very short time replacing the usual time-consuming separation procedures and avoiding artefacts during clean-up procedures.
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Universität Duisburg-Essen, Soniusweg 20, D-45259 Essen, Germany. bernhard.schrader@uni-essen.de
authors.forename: Bernhard
authors.initials: B
authors.lastname: Schrader
authors.forename: Hartwig
authors.initials: H
authors.lastname: Schulz
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Baranska
authors.forename: George N
authors.initials: GN
authors.lastname: Andreev
authors.forename: Caroline
authors.initials: C
authors.lastname: Lehner
authors.forename: Juergen
authors.initials: J
authors.lastname: Sawatzki
mesh_terms: D000114:Acetylene / Q000737:chemistry*; D019659:Asteraceae / Q000378:metabolism; D035264:Flowers / Q000378:metabolism; D018515:Plant Leaves / Q000378:metabolism; D010944:Plants / Q000378:metabolism*; D011786:Quality Control; D013053:Spectrophotometry; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013997:Time Factors
chemical_list: D000114:Acetylene