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Effects of solvent polarity and structure on intersystem crossing in diphenylcarbenes. A picosecond laser study on dimesitylcarbene

✍ Scribed by E.V. Sitzmann; J.G. Langan; D. Griller; K.B. Eisenthal

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 612 KB
Volume: 161
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(89)85098-5

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✦ Synopsis

The singlet to triplet intersystem crossing rate (&) for a series of diphenylcarbene derivatives is found to be a sensitive function of the energy splitting (AEsT), which in turn depends on the solvent polarity and on the structure ofthe carbene. A turn-over in the dependence of ksr on AEsT is found for the case of dimesitylcarbene (DMC) , where ksr is a decreasing function of AEsr.

The results for DMC provide the first example of intersystem crossitig in the large gap limit for a carbene.

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