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Fluorescence and Phosphorescence of Wool Keratin Excited by UV-A Radiation

Physics and Engineering Laboratory, DSIR, Private Bag, Lower Hutt, New Zealand

W.H. Melhuish

Institute of Nuclear Sciences, DSIR, Private Bag, Lower Hutt, New Zealand

Corrected fluorescence and phosphorescence spectra of wool keratin excited by UV-A radiation are presented. Some of the observed luminescence is believed to originate from N-formylkynurenine residues, which are photo-oxidation products of tryptophan residues.

The positions of the spectral maxima of the fluorescence and phosphorescence arising from N-formylkynurenine residues indicate that there is hydrogen bonding between the ortho carbonyl group of N-formylkynurenine and the N-H group of a protein peptide linkage. The N-formylkynureninine residues also appear to be located principally in regions of low polarity.

Textile Research Journal, Vol. 55, No. 5, 304-307 (1985)
DOI: 10.1177/004051758505500507


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