TY - JOUR
T1 - Photochemical properties of (7-benzothiazol-2-yl-9, 9-didecylfluoren-2-yl)diphenylamine under one- and two-photon excitation
AU - Belfield, Kevin D.
AU - Bondar, Mykhailo V.
AU - Przhonska, Olga V.
AU - Schafer, Katherine J.
N1 - Funding Information:
We wish to acknowledge the donors of The Petroleum Research Fund of the American Chemical Society, the Research Corporation Cottrell College Science program, the National Research Council COBASE program, the National Science Foundation, and the University of Central Florida Presidential Initiative for Major Research Equipment for partial support of this work.
PY - 2004/3/15
Y1 - 2004/3/15
N2 - 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.
AB - 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.
KW - Fluorene derivatives
KW - Photochemical quantum yield
KW - Photodecomposition
KW - Photostability
KW - Two-photon excitation
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U2 - 10.1016/S1010-6030(03)00416-7
DO - 10.1016/S1010-6030(03)00416-7
M3 - Article
AN - SCOPUS:1342264984
SN - 1010-6030
VL - 162
SP - 569
EP - 574
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
IS - 2-3
ER -