一个新的具有大的吸收截面的双光子引发剂的合成和非线性光学性质

E,E-1,4-Bis（4＇-N,N-diphenylaminostyryl）-2,5-dimethoxybenzene （DPAMOB） has been synthesized by a simple and effective solid phase Wittig reaction and characterized by 1^H NMR spectra and elemental analysis, Linear absorption, single-photon induced fluorescence and two-photon induced fluorescence spectra were experimentally studied. The new dye has a large two-photon absorption （TPA） cross-section of σr= 1007,2 GM 1 GM= 1 × 10^-50 cm^4·s/（photon molecule）] at 800 nm measured by the two-photon induced fluorescence method. The experimental results confirm that DPAMOB is a good TPA chromophore and can successfully initiate two-photon photopolymerization of ethoxylated trimethylolpropane triacrylate esters （SR454）. Finally, a microstructure has been fabricated by use of DPAMOB as initiator.

Synthesis and Nonlinear Optical Properties of a New Two‐photon Polymerization Initiator: DPAMOB with a Large TPA Cross‐section

E,E‐1,4‐Bis(4′‐N,N‐diphenylaminostyryl)‐2,5‐dimethoxybenzene (DPAMOB) has been synthesized by a simple and effective solid phase Wittig reaction and characterized by ¹H NMR spectra and elemental analysis. Linear absorption, single‐photon induced fluorescence and two‐photon induced fluorescence spectra were experimentally studied. The new dye has a large two‐photon absorption (TPA) cross‐section of σ_r=1007.2 GM 1 GM=1×10^?50 cm⁴·s/(photon molecule)] at 800 nm measured by the two‐photon induced fluorescence method. The experimental results confirm that DPAMOB is a good TPA chromophore and can successfully initiate two‐photon photopolymerization of ethoxylated trimethylolpropane triacrylate esters (SR454). Finally, a microstructure has been fabricated by use of DPAMOB as initiator.