Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (12): 2149-2152.doi: 10.3866/PKU.WHXB20081201

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Two-Photon Absorption Properties Dependent on Symmetry of Pyridinium Group and Cationic Structure

HUANG Hong, FAN Hai-Hua, WANG He-Zhou, TIAN Yu-Peng   

  1. Instrumental Analysis and Research Center, Zhongshan (Sun Yat-Sen) University, Guangzhou 510275, P. R. China; State Key Laboratory of Optoelectronic Materials and Technologies, Zhongshan (Sun Yat-Sen) University, Guangzhou 510275, P. R. China; 3College of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, P. R. China
  • Received:2008-03-25 Revised:2008-09-09 Published:2008-12-04
  • Contact: WANG He-Zhou E-mail:stswhz@mail.sysu.edu.cn

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Abstract: Structure-property relationships of four divinyl-biphenyl derivatives and two heterocyclic molecules (A: 4,4’-bis(2-(pyridin-4-yl)vinyl)biphenyl, B: 4,4’-bis(2-(pyridin-2-yl)vinyl)biphenyl, C: 1-methyl-4-(2-(4’-(2-(pyridin-4-yl)vinyl) biphenyl-4-yl)vinyl)pyridinium iodide, D: 1-methyl-2-(2-(4’-2-(pyridin-2-yl)vinyl) biphenyl-4-yl)vinyl) pyridinium iodide, E: 4-(2-(9-Butyl-9H-carbazol-3-yl)vinyl)-1-methyl-pyridinium iodide, and F: 4-(2-(9-butyl-9H-carbazol-3-yl)vinyl)-1-methyl-quinolinium iodide) that contain pyridinium groups were studied by laser spectroscopy. The largest two-photon absorption cross-section is 617.3 GMfor molecule E, and the smallest is 19.3 GM(1 GM=10-50 cm4·s·photon-1) for molecule B. Our research demonstrates that two-photon absorption cross-sections of compounds A-F are evidently dependent on both the pyridiniumgroup symmetry and the cationic structure.

Key words: Two-photon absorption cross-section, Molecular structure-property relationships, Laser spectroscopy, Charge transfer dipole moment