Two Photon Absorption Properties of 1,3,5-Tricyano-2,4,6-tris(styryl)benzene Derivatives
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- 作者：Bong Rae Cho ; Kyung Hwa Son ; Sang Hae Lee ; Young-Suk Song ; Yun-Kyoung Lee ; Seung-Joon Jeon ; Jun Ho Choi ; Hochan Lee ; and Minhaeng Cho
- 刊名：Journal of the American Chemical Society
- 出版年：2001
- 出版时间：October 17, 2001
- 年：2001
- 卷：123
- 期：41
- 页码：10039 - 10045
- 全文大小：116K
- 年卷期：v.123,no.41(October 17, 2001)
- ISSN：1520-5126
文摘
Two-photon absorption (TPA) properties of 1,3,5-tricyano-2,4,6-tris(styryl)benzene derivatives havebeen investigated. Comparison of the absorption and fluorescence spectra reveals that these compounds showlarge Stokes shifts, which increase gradually as the conjugation length increases. One-photon absorption andexcitation spectra are similar except that the latter exhibit several peaks near 
max. It is also found that the one-and two-photon-induced fluorescence excitation spectra are quite similar, which indicates that the one- andtwo-photon allowed-excited states are the same. The peak TPA cross section values (
max) measured withnanosecond pulses by the two-photon-induced fluorescence method are in the range (50-2620) × 10-50 cm4s/photon. The max value increases as the donor strength and conjugation length increase. A linear relationshipis observed between max and 
, and this - relationship is found to serve as a useful synthetic strategy forthe design of novel TPA dyes with the octupolar structure.
max. It is also found that the one-and two-photon-induced fluorescence excitation spectra are quite similar, which indicates that the one- andtwo-photon allowed-excited states are the same. The peak TPA cross section values (max) measured withnanosecond pulses by the two-photon-induced fluorescence method are in the range (50-2620) × 10-50 cm4s/photon. The max value increases as the donor strength and conjugation length increase. A linear relationshipis observed between max and , and this - relationship is found to serve as a useful synthetic strategy forthe design of novel TPA dyes with the octupolar structure.