DEUTERIUM-ISOTOPE EFFECTS IN THE PHOTOFRAGMENTATION OF NAPHTHALENE MONOCATIONS

被引：35

作者：

JOCHIMS, HW

RASEKH, H

RUHL, E

BAUMGARTEL, H

LEACH, S

机构：

[1] UNIV PARIS 11,CNRS,PHOTOPHYS MOLEC LAB,BAT 213,F-91405 ORSAY,FRANCE

[2] FREE UNIV BERLIN,INST PHYS CHEM,W-1000 BERLIN 33,GERMANY

[3] OBSERV PARIS,DAMAP,F-92195 MEUDON,FRANCE

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 07期

关键词：

D O I：

10.1021/j100109a011

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：

Deuterium isotope effects on the photofragmentation thresholds of naphthalene monocations are studied by photoion mass spectrometry using variable-energy monochromatized synchrotron radiation to photoionize C10H8 and C10D8. Kinetic isotope shifts (d-h) in the range 30-780 meV were observed for seven fragmentation reactions in the 15-20-eV region. The physicochemical factors leading to kinetic isotope effects are discussed. The observed kinetic isotope shifts are rationalized, mainly in terms of the RRKM/QET model and the specific reaction mechanism pathways. An astrophysical implication of these results is the possibility of deuterium fractionation of polycyclic aromatic hydrocarbons in the interstellar medium.

引用

页码：1312 / 1317

页数：6

共 23 条

[1] INTERSTELLAR POLYCYCLIC AROMATIC-HYDROCARBONS AND CARBON IN INTERPLANETARY DUST PARTICLES AND METEORITES [J].