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Photoinduced cooling of Eu3+ aqueous solution probed by the photothermal methods

✍ Scribed by Masahide Terazima; Seung Min Park

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
420 KB
Volume
228
Category
Article
ISSN
0009-2614

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✦ Synopsis

Energy flow processes after the photoexcitation of Eu 3+ in aqueous solution is investigated by the time-resolved thermal lens and the photoacoustic methods. Just after the photoexcitation around 590 nm, photoinduced cooling process is observed by the PA and TL methods. The time-resolved TL signal reveals that, after the initial cooling period, it turns to indicate heating with a lifetime of 85 us, which corresponds to the lifetime of the electronically excited state of Eu 3+. The cooling process is discussed.

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