Fluorescence of 9,10-dimethylanthracene in solutions containing diisopropylnaphthaline and in solid cyclodextrin complexes

✍ Scribed by T. Wolff; K. Pfanner; C. Springob

• Book ID: 103994049
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 672 KB
• Volume: 74
• Category: Article
• ISSN: 1010-6030
• DOI: 10.1016/1010-6030(93)80123-q

✦ Synopsis

Fluorescence and excitation spectra and fluorescence lifetimes of 9,10-dimethylanthracene (DMA) were measured in the solvents n-pentane, toluene, cyclohexane, decalin, diisoproylnaphthaline (DIPN), liquid paraffin, and aqueous cetytrimethylammonium chloride (CI'AC). Different viscosities had little influence on the fluorescence properties. The addition of increasing amounts of DIPN to cyclohexane solutions caused a gradual increase of the fluorescence lifetime from 15 to 20 ns, which was not observed in the micehar CIAC solutions. The formation of ground state clusters of DIPN and DMA in cyclohexane was concluded from the concentration dependence of the effects. In solid complexes of DMA and cyclodextrins (CD), lifetimes up to 30 ns were measured. Complexes with -,-CD can be prepared in such a way that either monomer emission or excimer emission is predominantly observed.