The one-color resonant two -photon ionization technique is employed to study jetcooled van der Waals(vdW)complex 0-xylene.N2 through the S0-S1 transition Around the band The spectra obtained exhibit rich information a...The one-color resonant two -photon ionization technique is employed to study jetcooled van der Waals(vdW)complex 0-xylene.N2 through the S0-S1 transition Around the band The spectra obtained exhibit rich information about the complex intermolecular vdW vibrational modes.We have tentatively assgned all the observed Spectral features.The structure of the complex has been obtained by calculation of the minimum energy structure.展开更多
The induction period of dehydrogenation and aromatization of methane over Mo/HZSM 5 was studied by real time resonance enhanced two photon ionization (RE2PI) technique. It is found that the formation of benzene eviden...The induction period of dehydrogenation and aromatization of methane over Mo/HZSM 5 was studied by real time resonance enhanced two photon ionization (RE2PI) technique. It is found that the formation of benzene evidently involves three different stages during the induction period. This probably means that the active sites of the catalysts undergo a transformation from Mo 6+ species to lower valence Mo species, and the Mo 6+ species also has feeble catalytic activity.展开更多
文摘The one-color resonant two -photon ionization technique is employed to study jetcooled van der Waals(vdW)complex 0-xylene.N2 through the S0-S1 transition Around the band The spectra obtained exhibit rich information about the complex intermolecular vdW vibrational modes.We have tentatively assgned all the observed Spectral features.The structure of the complex has been obtained by calculation of the minimum energy structure.
文摘The induction period of dehydrogenation and aromatization of methane over Mo/HZSM 5 was studied by real time resonance enhanced two photon ionization (RE2PI) technique. It is found that the formation of benzene evidently involves three different stages during the induction period. This probably means that the active sites of the catalysts undergo a transformation from Mo 6+ species to lower valence Mo species, and the Mo 6+ species also has feeble catalytic activity.
