ROTATIONALLY RESOLVED ULTRAVIOLET-SPECTRUM OF THE BENZENE-AR COMPLEX BY MASS-SELECTED RESONANCE-ENHANCED 2-PHOTON IONIZATION

被引:183
作者
WEBER, T
VONBARGEN, A
RIEDLE, E
NEUSSER, HJ
机构
[1] Institut für Physikalische und Theoretische Chemie, Technische Universität München, D-8046 Garching
关键词
D O I
10.1063/1.458394
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
High resolution laser excitation was combined with the technique of mass-selected two-photon ionization via a resonant intermediate state to measure rotationally resolved UV spectra of benzene-Ar van der Waals clusters. When the second laser pulse in the two color experiment is delayed by 7 ns no line broadening due to the second ionizing absorption step is observed. Spectra of three vibronic bands in the S1 ← S0 transition of benzene (h6)-Ar and benzene (d6)-Ar were measured yielding a line spectrum with a linewidth of 130 MHz. Resolution is sufficient to demonstrate that no asymmetry splitting of the rotational lines occurs and the spectrum is to a high precision that of a symmetric rotor. A detailed analysis of the rotational structure yields an accurate set of rotational constants. We find that the Ar is located on the C6 rotational axis. Its distance from the benzene ring plane is 3.582 Å in the electronic ground state and decreases by 59 ± 3 mÅ in the electronically excited state due to the increased polarizability of the benzene molecule after electronic excitation. © 1990 American Institute of Physics.
引用
收藏
页码:90 / 96
页数:7
相关论文
共 33 条
[1]  
BALOCCHI FA, 1983, J PHYS CHEM-US, V87, P2079, DOI 10.1021/j100235a012
[2]   ROTATIONAL ANALYSIS OF THE 1B2U(PI-PI-STAR) ]-1A1G(610) BAND OF BENZENE AND HELIUM-BENZENE VANDERWAALS COMPLEXES IN A SUPERSONIC JET [J].
BECK, SM ;
LIVERMAN, MG ;
MONTS, DL ;
SMALLEY, RE .
JOURNAL OF CHEMICAL PHYSICS, 1979, 70 (01) :232-237
[3]   IONIZATION-POTENTIALS OF LARGE VANDERWAALS MOLECULES [J].
BENHORIN, N ;
EVEN, U ;
JORTNER, J .
JOURNAL OF CHEMICAL PHYSICS, 1989, 91 (01) :331-339
[4]   ISOTOPE SELECTIVE SOFT MULTI-PHOTON IONIZATION AND FRAGMENTATION OF POLYATOMIC-MOLECULES [J].
BOESL, U ;
NEUSSER, HJ ;
SCHLAG, EW .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1981, 103 (17) :5058-5060
[5]   NEW S1-VIBRONIC LEVEL ASSIGNMENTS FOR S-TETRAZINE VAPOR - POLARIZATION AND LIFETIME MEASUREMENTS [J].
BRUMBAUGH, DV ;
HAYNAM, CA ;
LEVY, DH .
JOURNAL OF MOLECULAR SPECTROSCOPY, 1982, 94 (02) :316-335
[6]   CLUSTERS - PROPERTIES AND FORMATION [J].
CASTLEMAN, AW ;
KEESEE, RG .
ANNUAL REVIEW OF PHYSICAL CHEMISTRY, 1986, 37 :525-550
[7]   DETERMINATION OF THE IONIZATION-ENERGY OF THE BENZENE ARGON COMPLEX BY ZERO KINETIC-ENERGY PHOTOELECTRON-SPECTROSCOPY [J].
CHEWTER, LA ;
MULLERDETHLEFS, K ;
SCHLAG, EW .
CHEMICAL PHYSICS LETTERS, 1987, 135 (03) :219-222
[8]   SUB-DOPPLER LASER SPECTROSCOPY OF NO2 IN THE LAMBDA = 592.5-NM REGION [J].
FOTH, HJ ;
VEDDER, HJ ;
DEMTRODER, W .
JOURNAL OF MOLECULAR SPECTROSCOPY, 1981, 88 (01) :109-125
[9]   STUDY OF ISOTOPE EFFECTS IN BENZENE DIMERS IN A SEEDED SUPERSONIC JET [J].
FUNG, KH ;
SELZLE, HL ;
SCHLAG, EW .
JOURNAL OF PHYSICAL CHEMISTRY, 1983, 87 (25) :5113-5116
[10]   IONIZATION-POTENTIAL OF THE BENZENE-ARGON COMPLEX IN A JET [J].
FUNG, KH ;
HENKE, WE ;
HAYS, TR ;
SELZLE, HL ;
SCHLAG, EW .
JOURNAL OF PHYSICAL CHEMISTRY, 1981, 85 (24) :3560-3563