Anomalously short fluorescence lifetimes in jet cooled 4-hydroxyindole. Evidence for excited state tautomerism and proton transfer in clusters

✍ Scribed by Yuhui Huang; Mark Sulkes

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 395 KB
• Volume: 254
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(96)00311-9

✦ Synopsis

Jet cooled fluorescence lifetimes following excitation of S I origins have been measured for 4-hydroxyindole. The subnanosecond values obtained are anomalous compared to other substituted indoles, in particular 5-hydroxyindole. The short lifetimes are most likely related to excited state tautomerism in the bare 4-hydroxyindole. It was further found that one solvent molecule addition of triethylamine to 4-hydroxyindole is sufficient to induce excited state proton transfer, to a significantly greater extent than with 5-hydroxyindole.