The kinetic processes of the photoionization and dissociation of 4H-furan have been investigated by using synchrontron radiation. The IP of 4H-furan and APs of other lons are gotten from the spectra,the possible chann...The kinetic processes of the photoionization and dissociation of 4H-furan have been investigated by using synchrontron radiation. The IP of 4H-furan and APs of other lons are gotten from the spectra,the possible channels of dissociative photoionization have been annalyzed. A serices of stable clusters composed of (THF)n. (H2O)n-2H+ (n=2,3,4,5) are present in the MS and the possible structures of the clusters are given.展开更多
锡烯作为新型的二维材料由于其预测的优异特性受到广泛关注,锡烯在生长过程中与衬底间的相互作用是该体系研究的重要课题。本文采用分子束外延法在平整有序的Au(111)表面沉积Sn元素制备锡烯,利用原位条件下的低能电子衍射(Low Energy El...锡烯作为新型的二维材料由于其预测的优异特性受到广泛关注,锡烯在生长过程中与衬底间的相互作用是该体系研究的重要课题。本文采用分子束外延法在平整有序的Au(111)表面沉积Sn元素制备锡烯,利用原位条件下的低能电子衍射(Low Energy Electron Diffraction,LEED)和同步辐射光电子能谱(Synchrotron Radiation Photoemission Spectroscopy,SR-PES)对不同覆盖度的样品表面进行分析,系统地研究了超高真空环境下锡烯在Au(111)表面的形成过程。结果表明:Sn原子先与Au(111)衬底发生强相互作用形成合金,随着生长厚度的增加,逐步形成锡烯并覆盖在合金表面。展开更多
The photoionization and photodissociation of bromoethane have been studied by using synchrotron radiation.The photoionization efficiency (PIE) curves of some fragments ions are measured.Based on these curves,the ioniz...The photoionization and photodissociation of bromoethane have been studied by using synchrotron radiation.The photoionization efficiency (PIE) curves of some fragments ions are measured.Based on these curves,the ionization potential of C 2H 5Br is determined to be 10.29eV,and the appearance potentials of C 2H 5 + ,CH 2Br +are measured to be 10.60eV,13.2eV respectively.We also have performed G2MP2 calculation on these fragments.According to experimental result and G2MP2 energy,the enthalpy of formation of ions C 2H 5 +,CH 2Br +,C 2H 5Br +,the bond energy of D 0(C 2H 5 +-Br),D 0(-Br),D 0(CH 2Br +-CH 3) have been evaluated.The most possible channels of the dissociation photoionization have been analyzed.展开更多
文摘The kinetic processes of the photoionization and dissociation of 4H-furan have been investigated by using synchrontron radiation. The IP of 4H-furan and APs of other lons are gotten from the spectra,the possible channels of dissociative photoionization have been annalyzed. A serices of stable clusters composed of (THF)n. (H2O)n-2H+ (n=2,3,4,5) are present in the MS and the possible structures of the clusters are given.
文摘锡烯作为新型的二维材料由于其预测的优异特性受到广泛关注,锡烯在生长过程中与衬底间的相互作用是该体系研究的重要课题。本文采用分子束外延法在平整有序的Au(111)表面沉积Sn元素制备锡烯,利用原位条件下的低能电子衍射(Low Energy Electron Diffraction,LEED)和同步辐射光电子能谱(Synchrotron Radiation Photoemission Spectroscopy,SR-PES)对不同覆盖度的样品表面进行分析,系统地研究了超高真空环境下锡烯在Au(111)表面的形成过程。结果表明:Sn原子先与Au(111)衬底发生强相互作用形成合金,随着生长厚度的增加,逐步形成锡烯并覆盖在合金表面。
文摘The photoionization and photodissociation of bromoethane have been studied by using synchrotron radiation.The photoionization efficiency (PIE) curves of some fragments ions are measured.Based on these curves,the ionization potential of C 2H 5Br is determined to be 10.29eV,and the appearance potentials of C 2H 5 + ,CH 2Br +are measured to be 10.60eV,13.2eV respectively.We also have performed G2MP2 calculation on these fragments.According to experimental result and G2MP2 energy,the enthalpy of formation of ions C 2H 5 +,CH 2Br +,C 2H 5Br +,the bond energy of D 0(C 2H 5 +-Br),D 0(-Br),D 0(CH 2Br +-CH 3) have been evaluated.The most possible channels of the dissociation photoionization have been analyzed.
