Highly Efficient Cucurbit[8]uril-Templated Intramolecular Photocycloaddition of 2-Naphthalene-Labeled Poly(ethylene glycol) in Aqueous Solution
摘要:
[GRAPHICS]The photodimerization of water-insoluble 2-naphthalene-labeled poly(ethyl glycol) (N-P-n-N) in cucurbit[8]uril (CB[8]) aqueous solution was investigated. UV-vis, fluorescence, and H-1 NMR analysis reveal that CB[8] can encapsulate N-P-n-N to make a stable 1:1 inclusion complex N-P-n-N@CB[8] in aqueous solution. Irradiation of N-P-n-N in the CB[8] aqueous solution results in intramolecular photocycloaddition with remarkable selectivity and efficiency, whereas no photodimer could be detected in host-free solution.
Lipophobic effects on photochemical and photophysical behavior of molecules with polar chains in nonpolar solvents. Evidence for intermolecular aggregation and self-coiling
作者:Chenho Tung、Yiming Wang
DOI:10.1021/ja00173a021
日期:1990.8
Dimerisation sous UV des naphtalenes situes a chaque extremite d'une chaine de polymere d'ethylene oxydes de longueur variable
二聚化 sous UV desnaphtalenes 位于 chaque extremite d'une chaine depolymere d'ethylene oxydes de longueur
Highly Efficient Cucurbit[8]uril-Templated Intramolecular Photocycloaddition of 2-Naphthalene-Labeled Poly(ethylene glycol) in Aqueous Solution
[GRAPHICS]The photodimerization of water-insoluble 2-naphthalene-labeled poly(ethyl glycol) (N-P-n-N) in cucurbit[8]uril (CB[8]) aqueous solution was investigated. UV-vis, fluorescence, and H-1 NMR analysis reveal that CB[8] can encapsulate N-P-n-N to make a stable 1:1 inclusion complex N-P-n-N@CB[8] in aqueous solution. Irradiation of N-P-n-N in the CB[8] aqueous solution results in intramolecular photocycloaddition with remarkable selectivity and efficiency, whereas no photodimer could be detected in host-free solution.