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8095308 
Journal Article 
Synthesis and properties of novel two-photon polymerization initiator 9-benzyl-3, 6-bis [2-(pyridine-4-yl) vinyl] carbazole 
Yin, L; Yang, J; Chen, W; Duan, X 
2007 
34 
6 
579-583 
Chinese 
A novel molecule with C2v symmetry, 9-benzyl-3, 6-bis [2-(pyridine-4-yl) vinyl] carbazole (BPyVC), has been synthesized by the Heck reaction of 4-vinyl pyridine with 9-benzyl-3, 6-dibromocarbazole; the latter was obtained by bromination of 9-benzyl carbazole with N-bromosuccinimde. The structure of BPyVC was verified by 1H-NMR, IR and MS. The photophysical properties of BPyVC were investigated in the polymerization of methacrylic acid. Results of two-photon polymerization (TPP) experiments, with 0.09% BPyVC as TPP initiator, showed that the resulting resin exhibited a minimum energy density of 92.7 kJ/cm2 with a scan speed of 22μm/s, and a that a minimum exposure time of 1.15 ms was required with a light power of 12.7 mW. 
Carbazole derivatives; Energy density; Two photon polymerization