On the Nature of Carbonyl Groups in Cellulosic Pulps |
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| Authors: | Antje Potthast Thomas Rosenau Paul Kosma Anna-Maija Saariaho Tappani Vuorinen |
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| Affiliation: | (1) Institute of Chemistry, Christian-Doppler-Laboratory, University of Agricultural Sciences, Muthgasse 18, A-1190 Vienna, Austria;(2) Department of Forest Products Technology, Helsinki University of Technology, P.O. Box 6300, 02015 HUT Espoo, Finland |
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| Abstract: | Apart from the reducing end groups, most celluloses contain small amounts of carbonyl groups in the  mol/g range, which are introduced into the material by a variety of preparation, processing and purification steps. By a combination of carbonyl-selective fluorescence labeling (CCOA method) and UV resonance Raman spectroscopy it was demonstrated that carbonyls in celluloses are not only present as a C=O structure with an sp2-hybridized carbon, but also to a significant extent in sp3-hybridized form as hydrates or hemiacetals. |
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| Keywords: | Carbonyl groups CCOA method Cellulose Fluorescence labeling UV resonance Raman spectroscopy |
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