葫芦[8]脲/葫芦[7]脲控制吖啶鎓和9-氨基吖啶鎓阳离子在水溶液中的荧光开关。
Cucurbit[8]uril/cucurbit[7]uril controlled off/on fluorescence of the acridizinium and 9-aminoacridizinium cations in aqueous solution.
作者信息
Wang Ruibing, Yuan Lina, Ihmels Heiko, Macartney Donal H
机构信息
Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, ON K7L 3N6, Canada.
出版信息
Chemistry. 2007;13(22):6468-73. doi: 10.1002/chem.200700199.
The blue fluorescence of acridizinium bromide (ADZ+) and the green fluorescence of 9-aminoacridizinium bromide (AADZ+) in aqueous solutions can be almost entirely switched off upon the double inclusion of these guests in the cavity of cucurbit[8]uril (CB[8]) owing to the formation of a nonfluorescent, noncovalent dimer complex, and then fluorescence can be effectively restored by adding cucurbit[7]uril (CB[7]) to the complex because it competitively extracts the fluorophores out of the CB[8] cavity.
在水溶液中，吖啶鎓溴化物（ADZ⁺）的蓝色荧光和9-氨基吖啶鎓溴化物（AADZ⁺）的绿色荧光，在这些客体双重包合于葫芦[8]脲（CB[8]）空腔中时，由于形成了非荧光的非共价二聚体复合物，几乎可以完全猝灭，然后通过向该复合物中加入葫芦[7]脲（CB[7]），荧光可以有效地恢复，因为它能竞争性地将荧光团从CB[8]空腔中萃取出来。
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