✦ LIBER ✦
Enhancement of photoinduced intramolecular cross-cycloaddition of α-(9-anthryl)-ω-(1-naphthoyl) end-labeled poly(ethylene glycol) via lipophobic interactions and complexation with metal cations
✍ Scribed by Ming Xu; Li-Zhu Wu; Li-Ping Zhang; Chen-Ho Tung
- Book ID
- 104232046
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- French
- Weight
- 125 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
The fluorescence spectra and photocycloadditions of poly(ethylene glycol) labeled at the chain termini with one 9-anthryl and one 1-naphthoyl group (N-P n -A) both in non-polar and polar solvents in the presence of alkali-metal cations have been investigated. Lipophobic interactions in non-polar solvents and complexation of the polyether with cations in polar solvents force the two terminal groups of N-P n -A into proximity, and irradiation of the solutions produces intramolecular photocyclomers to the exclusion of intermolecular products.