PHOTOELECTRON-SPECTROSCOPY OF THE OXYGEN DIMER AND CLUSTERS

被引:7
作者
CARNOVALE, F
PEEL, JB
ROTHWELL, RG
机构
[1] LA TROBE UNIV,DEPT CHEM,BUNDOORA,VIC 3083,AUSTRALIA
[2] LA TROBE UNIV,ELECTRON SPECT & SURFACE SCI RES CTR,BUNDOORA,VIC 3083,AUSTRALIA
来源
ORGANIC MASS SPECTROMETRY | 1991年 / 26卷 / 04期
关键词
D O I
10.1002/oms.1210260406
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The He I photoelectron spectra of gas-phase oxygen dimer and oxygen clusters have been measured in a pulsed beam. The spectrum of the dimer (O2)2 is characterized by broad bands which show 1:1 correspondence with those of the monomer O2. The vertical ionization energies are 0.2 +/- 0.1 eV lower than those of the monomer. The photoelectron bands observed for mixtures of small clusters are identical to the dimer bands except for further shifts of up to approximately 0.3 eV to lower ionization energies. The clusters spectra show bandwidths and bandshapes which are effectively the same as those measured for thin films of condensed O2, indicating that the oxygen dimer (O2)2 is the ionization chromophore in each case. This supports the dimer-ion hypothesis proposed for the ionization of van der Waals clusters of closed-shell molecules. Ab initio calculations on (O2)2+ show good agreement with the experimental data, and suggest that the ground dimer-ion electronic state is of rectangular rather than trans-planar geometry.
引用
收藏
页码:201 / 207
页数:7
相关论文
共 53 条
  • [1] PHOTO-IONIZATION OF (H-2)2 AND CLUSTERS OF O-2 MOLECULES
    ANDERSON, SL
    HIROOKA, T
    TIEDEMANN, PW
    MAHAN, BH
    LEE, YT
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1980, 73 (10) : 4779 - 4783
  • [2] [Anonymous], 1986, AB INITIO MOL ORBITA
  • [3] ANTIFERROMAGNETIC AND CRYSTAL STRUCTURES OF ALPHA-OXYGEN
    BARRETT, CS
    MEYER, L
    WASSERMAN, J
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1967, 47 (02) : 592 - +
  • [4] PHOTODISSOCIATION OF (CO)2+ - THEORETICAL-STUDIES OF GROUND 2BU AND EXCITED 2BG POTENTIAL-ENERGY SURFACES
    BLAIR, JT
    WEISSHAAR, JC
    CARPENTER, JE
    WEINHOLD, F
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1987, 87 (01) : 392 - 410
  • [5] THE RATE-CONSTANT FOR THE DIMOL TRANSITION OF SINGLET OXYGEN, O2(A1-DELTA-G), AND THE LIKELY SYMMETRY OF THE EMITTING SPECIES
    BORRELL, P
    RICH, NH
    [J]. CHEMICAL PHYSICS LETTERS, 1983, 99 (02) : 144 - 147
  • [6] VANDERWAALS MOLECULES - POSSIBLE ROLES IN THE ATMOSPHERE
    CALO, JM
    NARCISI, RS
    [J]. GEOPHYSICAL RESEARCH LETTERS, 1980, 7 (05) : 289 - 292
  • [7] AMMONIA DIMER STUDIED BY PHOTOELECTRON-SPECTROSCOPY
    CARNOVALE, F
    PEEL, JB
    ROTHWELL, RG
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1986, 85 (11) : 6261 - 6266
  • [8] PHOTOELECTRON-SPECTROSCOPY OF ARGON CLUSTERS - EVIDENCE FOR AN AR-13 IONIZATION CHROMOPHORE
    CARNOVALE, F
    PEEL, JB
    ROTHWELL, RG
    VALLDORF, J
    KUNTZ, PJ
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1989, 90 (03) : 1452 - 1459
  • [9] PHOTOELECTRON-SPECTROSCOPY OF THE NITROGEN DIMER (N2)2 AND CLUSTERS (N2)N-N2 DIMER REVEALED AS THE CHROMOPHORE IN PHOTOIONIZATION OF CONDENSED NITROGEN
    CARNOVALE, F
    PEEL, JB
    ROTHWELL, RG
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1988, 88 (02) : 642 - 650
  • [10] PHOTOELECTRON-SPECTROSCOPY USING PULSED FREE JETS
    CARNOVALE, F
    PEEL, JB
    ROTHWELL, RG
    [J]. AUSTRALIAN JOURNAL OF PHYSICS, 1986, 39 (05): : 789 - 798