MOLECULAR BEAM PHOTOIONIZATION STUDY OF CARBON DISULFIDE, CARBON DISULFIDE DIMER AND CLUSTERS

A new molecular beam photoionization mass spectrometer which is significantly superior to previous similar instruments in both wavelength resolution and ion intensity is described. Photoionization efficiency (PIE) data for CS2+ near the threshold (1210–1232 and 1075–1130 A) were obtained with a resolution of 0.14 A (FWHM). Rydberg series I, n=16–24, which converges to the spin–orbit excited state, 2Π1/2, of CS2+ was resolved on the first vibrational step in the PIE data. Observation of the autoionization resonance, series I (n=16), indicates that the value for the first ionization energy (I.E.) for CS2 obtained in previous absorption experiments (Ref. 23) is too high. The I.E.’s for the 2Π3/2 and 2Π1/2 states of CS2 were determined to be 10.0685±0.0020 and 10.1230±0.0020 eV, respectively. PIE data for (CS2)n+ with n ranging from 2 to 5 have been obtained in the wavelength region from 650 to 1350 A with this apparatus. The observed I.E.’s for (CS2)2, (CS2)3, (CS2)4, and (CS2)5 are 9.36±0.02, 9.22±0.02, 9.1...

[1]  Y. Ono,et al.  A study of the chemiionization process CS2*(n)+CS2→CS3++CS+e− using the molecular beam photoionization method , 1980 .

[2]  E. A. Walters,et al.  Photoionization of carbon disulfide monomers and dimers in a supersonic molecular beam , 1979 .

[3]  C. Ng,et al.  Proton affinities of hydrogen halides determined by the molecular beam photoionization method , 1979 .

[4]  C. Ng,et al.  Photoionization of ethylene clusters , 1979 .

[5]  J. English,et al.  Laser induced fluorescence spectrum of matrix isolated CS+2 , 1979 .

[6]  L. Cederbaum,et al.  Strong correlation effects in the ionisation of CS2 , 1979 .

[7]  E. A. Walters,et al.  Molecular beam photoionization study of acetone and acetone‐d6 , 1978 .

[8]  N. Damany,et al.  Rydberg series of carbon disulfide converging to à 2Πu states of CS2 , 1978 .

[9]  James W. Taylor,et al.  A photoionization study of carbon dioxide dimers in a supersonic molecular beam , 1978 .

[10]  R. Frey,et al.  Photoionization resonance study of the X̃(2Π), Ã(2Π), B̃(2Σ+) and C̃(2Σ+) states of CS2+ and COS+ , 1978 .

[11]  C. Ng,et al.  Photoionization studies of the diatomic heteronuclear rare gas molecules XeKr, XeAr, and KrAr , 1977 .

[12]  F. H. Field,et al.  Proton affinities and cluster ion stabilities in CO2 and CS2. Applications in Martian ionospheric chemistry , 1977 .

[13]  C. Ng,et al.  The binding energy between NO and NO , 1977 .

[14]  C. Ng,et al.  Photoionization studies of the Kr2 and Ar2 van der Waals molecules , 1977 .

[15]  C. Ng,et al.  Photoionization study of the Xe2 van der Waals molecule , 1976 .

[16]  G. W. King,et al.  Rydberg states of carbon dioxide and carbon disulfide , 1976 .

[17]  W. Chupka,et al.  High resolution photoionization study of ion‐pair formation in H2, HD, and D2 , 1975 .

[18]  James W. Taylor,et al.  A photoionization mass spectrometer utilizing a high intensity molecular beam sampling system and synchrotron radiation , 1973 .

[19]  James W. Taylor,et al.  Photoionization mass spectrometry: IV. Carbon dioxide , 1972 .

[20]  H. C. Chang,et al.  Absorption spectrum of CS2 in the region from 600 to 1015 Å , 1970 .

[21]  G. R. Cook,et al.  Photoionization, Absorption, and Fluorescence of CS2 , 1969 .

[22]  D. W. Turner,et al.  Studies on the photoionisation of the linear triatomic molecules: N2O, COS, CS2 and CO2 using high-resolution photoelectron spectroscopy , 1969 .

[23]  J. Eland,et al.  Photoelectron spectra and ionic structure of carbon dioxide, carbon disulphide and sulphur dioxide , 1968 .

[24]  W. Duax,et al.  Crystal Structure and Molecular Motion of Solid Carbon Disulfide , 1968 .

[25]  James A. Walker,et al.  Mass-Spectrometric Study of Photoionization. VI. O 2 , CO 2 , COS, and CS 2 † , 1967 .

[26]  W. Simpson.  Theories of Electrons in Molecules , 1963 .

[27]  N. R. Daly.  Scintillation Type Mass Spectrometer Ion Detector , 1960 .

[28]  F. LeBlanc,et al.  Higher Ionization Potentials of Linear Triatomic Molecules. II. CS2, COS, and N2O , 1958 .

[29]  W. Price,et al.  The absorption spectra of sulphur dioxide and carbon disulphide in the vacuum ultra-violet , 1938, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[30]  P. Coppens,et al.  Mass spectrometric study of the photoionization of carbon disulphide in the wavelength interval 125–60 nm , 1979 .

[31]  S. Ceyer,et al.  Energetics of gas phase proton solvation by NH3 , 1979 .

[32]  J. Rabalais.  Principles of ultraviolet photoelectron spectroscopy , 1977 .

[33]  C. F. Curtiss,et al.  Molecular Theory Of Gases And Liquids , 1954 .