Abstract
The emission spectra and photodimerization of poly(ethylene glycol) oligomers with a naphthalene group as one terminal of each chain (N−P n ) in nonpolar solvents were investigated. The fluorescence spectra of N−P n in isopentane at temperatures below −20°C are dominated by excimer emission. The addition of unlabeled poly(ethylene glycol) to the solutions results in a reduction in the excimer emission and an enhancement of monomer emission. Fluorescence depolarization measurements at 77 K suggest the existence of significant energy migration. The glassy solutions show a strong delayed excimer fluorescence and triplet exxcimer phosphorescence. The photoirradiation yields ‘cubane-like’ photodimer of the naphthalene groups with high quantum yield. All these observations indicate the lipophobic interactions push N−P n chains together to form aggregates.
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.
