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Photo-induced chemiluminescence from fibrous polymers and proteins

Version 2 2024-06-17, 21:35
Version 1 2017-05-09, 14:58
journal contribution
posted on 2024-06-17, 21:35 authored by KR Millington, C Deledicque, MJ Jones, G Maurdev
A commercial thermal chemiluminescence (TCL) instrument was modified to allow in situ sample irradiation at wavelengths in the range 320–700 nm under a controlled atmosphere at constant temperature. Weak photo-induced chemiluminescence (PICL) emission was observed from commercial poly(ethylene terephthalate), polyacrylonitrile, and polyamide 6 fabrics, cotton fabric and from the fibrous proteins wool and feather keratin, silk fibroin and bovine skin collagen (Type 1) after exposure to UVA (320–400 nm) or visible light in nitrogen, followed by a change of the atmosphere to oxygen. Collagen emits PICL of similar intensity to keratin, which demonstrates that tryptophan is not essential for PICL emission from proteins. In all cases the decay of PICL with time is complex and does not follow simple first- or second-order kinetics. The effects of experimental variables, including wavelength of radiation and exposure time, sample temperature and fabric pH on the PICL intensity and decay profile are reported for wool keratin.

History

Journal

Polymer Degradation and Stability

Volume

93

Pagination

640-647

Location

London, Eng.

ISSN

0141-3910

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2008, Elsevier

Issue

3

Publisher

Elsevier