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Effects of symmetric intramolecular charge transfer and molecular coplanarity on two-photon polymerization

F. Q. GUO1,2,* , X. L. SUN1, H. LIANG3, B. GUO4, X. J. FU1, Z. Y. HU1, Q. J. ZHANG2

Affiliation

  1. Department of Materials Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, P.R.China
  2. Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, P. R. China
  3. Department of Chemical Engineering, Huizhou University, Guangdong, 516007, P. R. China
  4. College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, P. R. China

Abstract

Three nonlinear chromophores of stilbene derivatives, 4,4´-bis(diphenylamino-trans-styryl)biphenyl (BPSBP), 4,4´- bis(diethylamino-trans-styryl)biphenyl (BESBP) and 4,4´-bis(9-carbazyl-trans-styryl)biphenyl (BCSBP) have been synthesized, which possess symmetric D-π-D molecular structure and different extended coplanar conjugation. Two-photon absorption (TPA) cross- sections, 892 GM, 617 GM and 483 GM respectively, were measured by up-converted fluorescence technique. One- and two-photon induced photophysical properties show that symmetric intramolecular charge transfer based on molecular coplanarity played an important role in TPA behaviors, which was further demonstrated by the results of twophoton induced polymerization (TPIP) using these chromophores as TPIP photoinitiators..

Keywords

Two-photon absorption, Nonlinear chromophore, Polymerization.

Submitted at: April 14, 2008
Accepted at: July 10, 2008

Citation

F. Q. GUO, X. L. SUN, H. LIANG, B. GUO, X. J. FU, Z. Y. HU, Q. J. ZHANG, Effects of symmetric intramolecular charge transfer and molecular coplanarity on two-photon polymerization, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 8, pp. 2181-2185 (2008)