摘要
A novel pyridinium salt, 2,4-bis[p-(N,N-dimethylamino)styryl]-N-methyl pyridinium iodide (BMSPI) was syn-thesized and characterized by TG, 1H NMR spectroscopy and elemental analysis, and the reaction process was studied by using ES-MS. When BMSPI was pumped by a pulsed 1064 nm, 50 ps laser beam, it manifests highly ef-ficient TPA (Two-Photon Absorption) and up-conversion superradiance. The up-conversion efficiency was 6.0% at the pump energy of 4—6 mJ and the lifetime of two-photon fluorescence was measured as 59 ps.
A novel pyridinium salt, 2,4-bis[p-(N,N-dimethylamino)styryl]-N-methyl pyridinium iodide (BMSPI) was syn-thesized and characterized by TG, 1H NMR spectroscopy and elemental analysis, and the reaction process was studied by using ES-MS. When BMSPI was pumped by a pulsed 1064 nm, 50 ps laser beam, it manifests highly ef-ficient TPA (Two-Photon Absorption) and up-conversion superradiance. The up-conversion efficiency was 6.0% at the pump energy of 4—6 mJ and the lifetime of two-photon fluorescence was measured as 59 ps.
基金
theMajorStateBasicResearchDevelopmentProgramofChina(No.G1998061402)
theNationalNaturalScienceFoundationofChina(Nos.50272001
20071001)
theNaturalScienceFoundationofAnhuiProvince(No.03044701)andtheMalaysianGovernmentand
