Abstract
The phosphorescence from three model bicyclic enones and those formed in thermally oxidized poly(butadiene) has been shown to be quenched efficiently by a nitroxide [3,3,4,4-tetramethyldiazetine N, N′-dioxide] in CH 2Cl 2:tetrahydrofuran glass at 77K. The Perrin model for static quenching was applied, and the interchromophoric distance for half-quenching found to be ∼ 12 A. At room temperature the nitroxide additive inhibited the formation of volatile products from thermally oxidized poly(butadiene) films: results also obeyed the Perrin relationship, pointing to a quenching mechanism of photostabilization. By contrast, a commercial hindered amine stabilizer was found not to act as a quencher of phosphorescence at 77K, and to have a concentration dependence for the reduction in volatile product formation at 298K in PBD films different from the nitroxide, indicating different mechanisms of action.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
