Solvent Effects on the Two-photon Absorption Cross Section of DCM Derivatives

Chem. J. Chinese Universities

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Solvent Effects on the Two-photon Absorption Cross Section of DCM Derivatives

SU Wen-Jie¹, YAO Yi-Shan², LI Man-Yu¹, TAN Hui¹, FU Li-Min^1*, AI Xi-Cheng¹, WANG Xue-Song², ZHANG Jian-Ping¹

1. Department of Chemistry, Renmin University of China, Beijing 100872, China;
2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China

Received:2008-04-18 Revised:1900-01-01 Online:2009-02-10 Published:2009-02-10
Contact: FU Li-Min

Abstract

Abstract: The One-photon photo-physical properties(difference in static dipole moments, transition dipole moment, transition energy, etc.) of four DCM derivatives, which contain triphenylamine centre, were investigated in a series of organic solvents, and the solvent effects on their two-photon absorption cross-sections(δ_tpa) were measured by means of two-photon induced fluorescence method. Steady spectra indicated that the excited states of these samples possess notable intramolecular charge transfer(ICT) character, and electron-withdrawing end groups had exerted large influences on the spectroscopic properties of these molecules, while the number of branch mainly influence the value of TPA cross-section. The differences in δ_tpa of the four samples can be well fitted by two-state expression of TPA. The trends of δ value with the increasing of solvent's dielectric constant are different by changing electron-withdrawing end groups.

Key words: Two-photon absorption, Solvent effect, Intra-molecular charge transfer

CLC Number:

O644.18

TrendMD:

SU Wen-Jie¹, YAO Yi-Shan², LI Man-Yu¹, TAN Hui¹, FU Li-Min^1*, AI Xi-Cheng¹, WANG Xue-Song², ZHANG Jian-Ping¹. Solvent Effects on the Two-photon Absorption Cross Section of DCM Derivatives[J]. Chem. J. Chinese Universities, doi: .

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Solvent Effects on the Two-photon Absorption Cross Section of DCM Derivatives

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