This letter presents excited state intramolecular proton transfer(ESIPT) of new conjugated derivatives containing hydroxy and imino groups.ESIPT occurrence in one photon process is confirmed by well-separated emission band for the derivatives.Twophoton absorption(TPA) induced ESIPT emission has been determined by Ti:sapphire femtosecond laser tuning from 700 nm to 800 nm at the internals of 20 nm.
Xiao Lin ZhongFang GaoQi WangHong Ru LiSheng Tao Zhang
This letter reports the influence of branches and bromine substitution of the photosensitizers on one-and two-photon absorption generation of singlet oxygen.Near-infrared femtosecond Ti:squassier laser was utilized to determine two-photon properties of the photosensitizers tuning wavelength from 700 to 880 nm at intervals of 20 nm.One-and two-photon optical and photophysical properties of the photosensitizers show significant dependence on the branches and substituted bromine atoms.
LI HongRuYE XiaoJuanLIU MengGAO FangLIU XiaoJiaoGUO QinYuan