TIME-RESOLVED FLUORESCENT ANALYSIS FOR SEALED HEATING OF DIMETHYL-BETA-CYCLODEXTRIN AND NAPHTHALENE SYSTEM

The inclusion process of naphthalene into heptakis-(2,6-di-O-methyl)-b eta-cyclodextrin (DM beta CD) during the sealed heating was investigat ed by using solid state time resolved fluorescent analysis. Fluorescen ce lifetimes of naphthalene in naphthalene crystals and in inclusion c omplex with DM beta CD prepared by coprecipitation were determined 59 ns and 88 ns, respectively. Fluorescence lifetime of naphthalene monom er becomes longer after inclusion complex formation. Fluorescence life times of naphthalene monomer and excimer in the sealed heating complex were determined about 80 ns and 100 ns, respectively. By setting the observing wavelength of time resolved fluorescent analysis at 355 nm, the formation and the decay of the excimer state of naphthalene during the sealed heating process were successfully confirmed.