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Tentative Assignment of the 1440-nm Absorption Band in the Near-Infrared Spectrum of Crystalline Sucrose

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The near-infrared spectra of complex molecules, especially those containing oxygen or nitrogen, are normally characterized by regions of broad absorption with no sharp features. This arises from the multitude of absorptions which will occur in a complex molecule and because of the peak-broadening effect of hydrogen bond formation. Sucrose is unusual in this respect, because the spectrum (Fig. 1) exhibits a narrow peak at 1440 nm. While the phenomenon has been known for some time, its identity has been a mystery to near-infrared spectroscopists.

Keywords: Hydrogen bonding; Near-infrared spectroscopy; OH absorption; Sucrose

Document Type: Short Communication

DOI: http://dx.doi.org/10.1366/0003702884429364

Affiliations: 1: Institute of Food Research, Norwich Laboratory, Colney Lane, Norwich, NR4 7UA, U.K.; present address: Oxford Analytical Instruments Ltd., 20 Nuffield Way, Abingdon OX14 1TX, U.K. 2: Department of Chemistry, University of Washington, Seattle, Washington 98195, U.S.A.

Publication date: May 1, 1988

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