Title

Photochemical Properties Of (7-Benzothiazol-2-Yl-9, 9-Didecylfluoren-2-Yl)Diphenylamine Under One- And Two-Photon Excitation

Keywords

Fluorene derivatives; Photochemical quantum yield; Photodecomposition; Photostability; Two-photon excitation

Abstract

The photochemical properties of the fluorene derivative (7-benzothiazol -2-yl-9,9-didecylfluoren-2-yl)diphenylamine (1) in hexane and CH2Cl2 were studied under linear (one-photon) and nonlinear (two-photon) excitation. The quantum yield of the photochemical reaction, Φ, for 1 in hexane was in the range (3.5-5)×10-5 for one-photon excitation (UVGL-25 and Xe-lamps) and was nearly the same under two-photon excitation (femtosecond laser with pulse duration 120 fs, average power ∼10 mW, repetition rate f=1 kHz). The values of Φ in CH2Cl2 were (2.5-4)×10-5 for one-photon excitation and increased 50-80 times under two-photon excitation. This increase can be explained by an additional one-photon absorption process from the first electronically excited state, resulting in the observed enhancement in photochemical decomposition. © 2004 Elsevier B.V. All rights reserved.

Publication Date

3-15-2004

Publication Title

Journal of Photochemistry and Photobiology A: Chemistry

Volume

162

Issue

2-3

Number of Pages

569-574

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/S1010-6030(03)00416-7

Socpus ID

1342264984 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/1342264984

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