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Intracoil excited singlet state annihilation in polyvinyldiphenylanthracene

✍ Scribed by Keiko Kamioka; S.E. Webber

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 565 KB
Volume: 133
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(87)87081-1

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✦ Synopsis

The intensity of fluorescence of poly(diphenylanthracene) (PDPA) has been found to be highly non-linear in excitation laser energy, while either diphenylanthracene or polystyrene with a low loading of covalently bound diphenylanthracene (PS-CO-DPA) is linear under the same conditions. It is proposed that a Fiirster-type annihilation process occurs: ST + ST+ So + S,** + 2So. The Ro for this process is estimated to be *35 A. On the other hand the singlet exciton diffusion constant (AS) is estimated to be very low, by the method of comparative quenching.

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