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Naranchimeg Dorjpalam Masaya Toda Hideaki itoh Fumio Hamada 《Journal of inclusion phenomena and macrocyclic chemistry》2004,50(1-2):79-85
Fluorescent active host labeled at the upper and lower rims of -cyclodextrin, namely, mono-3A-deoxy-3A-pyrenebutylamido-6X,Y-O-bis-pyrenebutylate-mono-altro--cyclodextrin (-3) has been synthesized as a chemosensor for steroidal guests using fluorescence spectra change upon a guest addition. The -3 shows monomer and excimer fluorescence, which results in an increase of the intensity of monomer and decrease of excimer fluorescence with a host–guest binding in the cyclodextrin cavity. The extent of monomer and excimer fluorescence variations of -3 was used as an indication for the sensing ability for the guests examined. The guest-induced fluorescence changes were measured for 10–7 M solutions of -3. The sensing parameters (Iex/I0ex and Imon/I0mono) were used to describe the sensing ability of -3. The values of Iex/I0ex describe that -3 shows less selectivity for guests than that of mono-3A-deoxy-3A-pyrenebutylamido-6X-O-mono-pyrenebutylate-mono-altro--cyclodextrin (-2), and the values of Imon/I0mono show that -3 shows higher sensitivity and selectivity than that of -2. 相似文献
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