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国家自然科学基金(s50272001)

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Two-photon-excited fluorescence of zinc(Ⅱ),cadmium(Ⅱ) complexes containing phenothiazine ligand
2003年
Two new ligands, S-benzyl-b-N-[10-ethylphenothiazine-3-methylene] dithiocarbazate (HL1), S-methyl-b-N-[10-ethylphenothiazine-3-methylene] dithiocarbazate (HL2), and their complexes 122222(ZnL, ZnL, CdL), which exhibit intensive two-photon excited (TPE) fluorescence at 800 nm laser pulses in the femtosecond regime, are synthesized and fully characterized. The measured power dependence of the fluorescence signals provides a direct evidence for TPE. All of them exhibit a large two-photon absorptive crosssection. The two-photon-excited fluorescence spectra of them are compared and contrasted with the corresponding results obtained from the one-photon excitation. Emission peaks of the ligands and their complexes are observed mostly at the region 550—595 nm in the TPE fluorescence spectra.
薛照明田玉鹏王东易佑民蒋民华
关键词:NLO
Synthesis, Luminescence and Electrochemical Properties of Two Phenothiazine Derivatives
2005年
The synthesis, luminescence and electrochemical properties of two novel phenothiazine derivatives were presented, which exhibit good one-photon fluorescence emission. The quantum yields and solvent effects of them were studied in detail. Compound 3,7-bis(2-4'-imidazolylbenzylidenehydrazonoethyl)-(0-ethylphenothiazine) (5) was used as an effective initiator, of which two-photon fluorescence spectra were investigated under 800 nm fs laser pulse and the measured two-photon absorption cross-section was 18 × 10^-50 cm^4·s per photon. Two-photon initiated polymerization microfabrication experiments were carried out. X-ray diffraction analyses revealed that the shape of the compound 3,7-bis(2-pyrid-4'-ylmethylidenehydrazonoethyl)-(0-ethylphenothiazine) (4) looks like a butterfly with nearly planar wings. The dihedral angle of the two benzene rings is 37.6° and there is an obvious π-π stacking interaction between the molecules in the crystal.
LI, Dong-MeiZHOU, Hong-PingPU, Ji-QinFENG, Xiao-JunaWU, Jie-YingTIAN, Yu-PengYU, Xiao-QiangTAO, Xu-TangJIANG, Min-Hua
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