Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Carin A. Helfer; Joo-Sang Sun; Mark A. Matties; Wayne L. Mattice; Richard W. Hemingway; Jan P. Steynberg; Lisa A. Kelly
    Date: 1995
    Source: Polymer Bulletin 34:79-85
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (780 KB)


    The common monomeric units in the polymeric proeyanidins are catechin and epicatechin, which have a hydroxyl group at C(5). This hydroxyl group is absent in the profisetinidins. The fluorescence properties have been characterized for the profisetinidin monomer and dimers, and compared with previous results for the procyanidins. There is a measurable heterogeneity in the fluorescence of fisetinidol, in contrast to the simpler fluorescence of the procyanidin monomers. This heterogeneity is attributed to differences in the photophysical properties of the aromatic A- and B-rings in fisetinidol. These differences are larger in fisetinidol than in catechin or epicatechin. The heterogeneity prevents detennination by fluorescence of the conformations at the interflavan bond in the profisetinidins by the data analysis employed successfully with the procyanidins.

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Helfer, Carin A.; Sun, Joo-Sang; Matties, Mark A.; Mattice, Wayne L.; Hemingway, Richard W.; Steynberg, Jan P.; Kelly, Lisa A. 1995. Implications of the fluorescence for the conformational analysis of polymeric profisetinidins and procyanidins. Polymer Bulletin 34:79-85

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page