2009 Volume 22 Issue 3 Pages 351-356
Distyryl pyridine (DSP) photosensitizer for HABI photoinitiator systems was newly designed and eleven methoxy DSP(distyrylpyridines)s were synthesized and evaluated. The results showed that 2, 4-dimethoxy DSP (24DMOP-DSP) was the most efficient among studied methoxy DSPs. Compared with coumarin 1 as reference, the photosensitivity for 24DMOP-DSP as photosensitizer was increased by 150%. Potential of DSP as photosensitizer was supported by the mechanism study, such like photobleaching property of 24DMOP-DSP, derived from configuration change of E to Z, and efficient fluorescence quenching of excited singlet DSP by BCIM.