Direct observation of intramolecular energy transfer from a β-diketonate to terbium (III) ion encapsulated in a cryptand

✍ Scribed by Jeong-A Yu; Ronald B. Lessard; Lawrence E. Bowman; Daniel G. Nocera

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 506 KB
• Volume: 187
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(91)90423-7

✦ Synopsis

The kinetics and pathway for the energy transfer from acetylacetonate (acac) to Tb3+ encapsulated in the macrocyclic cage of a cryptand in aqueous solution is established by time-resolved picosecond laser spectroscopy. The direct energy transfer from the 'XII* state of acac to the Tb3+ ion has been confirmed by monitoring the luminescence decay of acac and the concomitant appearance of Tb'+ luminescence at 546 nm. An intramolecular energy transfer rate of 9.7 X I O9 s-' is observed.