期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 12, 期 12, 页码 3431-3437出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b206578a
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A new two-photon free-radical photopolymerization initiator, (E, E)-4-{2-[p'-(N,N-di-n-butylamino) stilben-p-yl] vinyl} pyridine (abbreviated to DBASVP), has been synthesized. Quantum chemistry calculations showed that the new initiator possesses a large delocalized pi electron system, a large change in dipole moment on transition to the excited state and a large transition moment. The calculated two-photon absorption cross-section is as high as 881.34 x 10(-50) cm(4) s photon(-1). The single-photon and two-photon absorption and fluorescence properties in various solvents have been investigated carefully. The new initiator exhibits outstanding solvent-sensitivity, which experimentally interprets the excellent electron delocalized properties of the molecule. A microstructure has been fabricated under irradiation at 800 nm using a 200 fs, 76 MHz Ti: sapphire femtosecond laser.
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