Emission from the species CH3COC(OH)2CH3 in aqueous solutions of biacetyl

✍ Scribed by Yong J. Lee; John G. Burr

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 245 KB
• Volume: 43
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(76)80778-6

✦ Synopsis

A previously unreported emission at 435 nm from solutions of biacctyl in water, methanol or ethanol has been observed. It results from excitation at the 280 nm absorption peak but not from excitation at the 405 nm absorption maximum; its intensity is proportional to the amount of water in watcr/acctonitrile mixtures, and is insensitive to air concentration. Comparison of the position and intensity of this new pc;lk with the fluorcsccncc maxima of simple ketones such as acetone suggest ;hat it is emission from bizcctyl hcmi-hydrate or hemikctal, known to bc the prcdominant spccics in aqueous solutions of biacctyl. and shown to bc the predominant spccics in alcoholic solutions.