Register      Login
Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
Shopping Cart: ( empty )
You are here: Home > Journals > CH > CH07163
RESEARCH ARTICLE
Contents Vol 60(11)

Characterization of Eucalyptus and Chemically Related Exudates by Nuclear Magnetic Resonance Spectroscopy

Joseph B. Lambert A C , Yuyang Wu A , Michael A. Kozminski A and Jorge A. Santiago-Blay B
+ Author Affiliations
- Author Affiliations

A Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113, USA.

B Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, PO Box 37012, Washington, DC 20013-7012, USA.

C Corresponding author. Email: jlambert@northwestern.edu

Australian Journal of Chemistry 60(11) 862-870 https://doi.org/10.1071/CH07163
Submitted: 19 May 2007  Accepted: 9 August 2007   Published: 1 November 2007

Abstract

Exudates from six species of the genus Eucalyptus and one of the genus Corymbia (formerly Eucalyptus), from the family Myrtaceae, have been characterized by solid-state 13C and solution 1H NMR spectroscopy for the first time. Although these eucalypt kinos, as these exudates often are called, resemble resin (terpenoid) and gum (carbohydrate) exudates in physical appearance, their NMR spectra are dramatically different. In addition to lacking the characteristic terpene saturated resonances, they exhibit strong unsaturated resonances, which are weak for resins and absent for gums. We additionally report that exudates from genera of several other families of flowering plants (Amyris, Centrolobium, Guaiacum, Liquidambar, and Prosopis) also exhibit part or all of this kino spectroscopic signature.


Acknowledgements

The authors are grateful to the institutions listed in Table 1 for allowing us to collect on their premises and to colleagues who assisted in the collection, also listed therein. The present work was supported by the National Science Foundation for research support (grant no. CHE-0349412), the National Science Foundation for purchase of NMR equipment (DMR-0521267 and CHE-9871268), the Katherine L. Kriegbaum fund of the Weinberg College of Arts and Sciences for a grant to M.A.K., the Alumnae of Northwestern University, and the Graduate Research Institute of Gallaudet University. The authors are grateful to Dr E. P. Mazzola of the University of Maryland for critical discussions of the proton spectra.


References


[1]   Eucalyptus: the Genus Eucalyptus (Ed. Coppen J. J. W.) 2002 (CRC Press/Taylor & Francis: London).

[2]   Kubeczka K.-H., Formáček V., Essential Oils Analysis by Capillary Gas Chromatography and Carbon-13 NMR Spectroscopy, 2nd edn 2002 (Wiley: Chichester).

[3]   Mills J. S., White R., The Organic Chemistry of Museum Objects, 2nd edn 1994, Ch. 6, 8 (Butterworth–Heinemann: Oxford).

[4]   Maiden J. H., Useful Native Plants of Australia (Including Tasmania) 1975 (Turner and Henderson: London, 1889; facsimile edition, Compendium Press: Melbourne).

[5]   J. Tippett, IAWA (Inter. Assoc. Wood Anat.) Bull. New Series 1986, 7,  137.
         
         
        | Crossref |  GoogleScholarGoogle Scholar |  
        | Crossref |  GoogleScholarGoogle Scholar |  
        | Crossref |  GoogleScholarGoogle Scholar |  
        | Crossref |  GoogleScholarGoogle Scholar |  open url image1

[12]   Couchert C. J., Behnke J., The Aldrich Library of 13C and 1H FT NMR 1993 (Aldrich Chemical Co.: Milwaukee, WI).

[13]   Langenheim J. H., Plant Resins 2003, pp. 67–69 (Timber Press: Portland, OR).