Cyclodextrin-induced fluid solution room-temperature phosphorescence from acenaphthene in the presence of 2-bromoethanol

✍ Scribed by A.Muñoz de la Peña; I. Durán-Merás; F. Salinas; I.M. Warner; T.T. Ndou

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 625 KB
• Volume: 255
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(91)80067-4

✦ Synopsis

Abstmct

A 1 1 stolcluometrlc ratlo and a formanon constant of 130 1 mot-' were obtamed for the bmary mcluslon complex between acenaphthene and @cyclodextrm (CD) On addtion of 2-bromcethanol, effectrve quenchmg of the fluorescence emlsS]on and enhancement of the room-temperature phosphorescence (RTP) of acenaphthene 1s observed The use of 2-bromoethanol as an external "heavy atom" to obtam room-temperature phosphorescence m fhud solutions 1s &cussed The RTP ennsslon from accnaphthene Included m @-CD was optlmlzed and characterlzed The apparent formatlon constant of the ternary associate was determmed to be 880 1 mol-' by the use of RTP enhancement m the presence of 1% 2-bromoethanol The data mdlcate a ternary assocmtlon between acenaphthene, @-CD and the bromo alcohol The use of sodrum sulfite, for chenucal deoxygenatlon, to obtain RTP emission from a non-heavy atom-contalmng lummophor 1s shown to be feasible The kmetlcs of the deoxygenatlon reachon were established and a photochenucal catalytic effect on the reaction was demonstrated