The dynamics of the OH+HD gas-phase reaction: absolute reaction cross section and H/D atom product branching ratio

被引：13

作者：

Brownsword, RA ^{[1
]}

Hillenkamp, M ^{[1
]}

Schmiechen, P ^{[1
]}

Volpp, HR ^{[1
]}

Wolfrum, J ^{[1
]}

机构：

[1] UNIV HEIDELBERG,INST PHYS CHEM,D-69120 HEIDELBERG,GERMANY

来源：

CHEMICAL PHYSICS LETTERS | 1997年 / 275卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(97)00719-7

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：

The dynamics of the OH + HD reaction were studied in the gas-phase using the laser photolysis/vacuum-UV laser-induced fluorescence ''pump-and-probe'' technique. Translationally energetic OH((II)-I-2) radicals with an average reagent translational energy of E-c.m.=0.24 eV in the (OH-HD)-center-of-mass system were generated by the laser photolysis of H2O2 at 248 nm. Doppler profiles of nascent D and H atoms produced in reactive collisions of OH with room-temperature KD molecules were detected under single-collision conditions by VUV-LIF at the Lyman-alpha transition. For the OH + HD reaction an absolute reaction cross section of sigma(R)(0.24 eV) = (0.14 +/- 0.05) Angstrom(2) was determined by means of a calibration method using OH + D-2 as a reference reaction. The branching ratio for the OH + HD --> H + HOD(D + H2O) product channels was measured to be Gamma(H/D) = (1.2 +/- 0.2). (C) 1997 Elsevier Science B.V.

引用

页码：325 / 331

页数：7

共 34 条

[1] The dynamics of the reaction OH+D-2->HOD+D: Crossed beam experiments and quantum mechanical scattering calculations on ab initio potential energy surfaces [J].

Alagia, M ;

Balucani, N ;

Casavecchia, P ;

Stranges, D ;

Volpi, GG ;

Clary, DC ;

Kliesch, A ;

Werner, HJ .

CHEMICAL PHYSICS, 1996, 207 (2-3) :389-409

[2] CROSSED BEAM STUDIES OF 4-ATOM REACTIONS - THE DYNAMICS OF OH+D2 [J].

ALAGIA, M ;

BALUCANI, N ;

CASAVECCHIA, P ;

STRANGES, D ;

VOLPI, GG .

JOURNAL OF CHEMICAL PHYSICS, 1993, 98 (03) :2459-2462

[3] EVALUATED KINETIC AND PHOTOCHEMICAL DATA FOR ATMOSPHERIC CHEMISTRY SUPPLEMENT-IV - IUPAC SUBCOMMITTEE ON GAS KINETIC DATA EVALUATION FOR ATMOSPHERIC CHEMISTRY [J].

ATKINSON, R ;

BAULCH, DL ;

COX, RA ;

HAMPSON, RF ;

KERR, JA ;

TROE, J .

JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, 1992, 21 (06) :1125-1568

[4]

BAER M, 1996, SPRINGER SERIES CHEM, V61

[5] BOND-SPECIFIC CHEMISTRY - OD-OH PRODUCT RATIOS FOR THE REACTIONS H+HOD(100) AND H+HOD(001) [J].

BRONIKOWSKI, MJ ;

SIMPSON, WR ;

GIRARD, B ;

ZARE, RN .

JOURNAL OF CHEMICAL PHYSICS, 1991, 95 (11) :8647-8648

[6] COMPARISON OF REAGENT STRETCH VS BEND EXCITATION IN THE H+D2O REACTION - AN EXAMPLE OF MODE-SELECTIVE CHEMISTRY [J].

BRONIKOWSKI, MJ ;

SIMPSON, WR ;

ZARE, RN .

JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (10) :2204-2208

[7] Dynamics of the H+D2O->D+HOD hydrogen exchange reaction [J].

Brownsword, RA ;

Hillenkamp, M ;

Laurent, T ;

Vatsa, RK ;

Volpp, HR ;

Wolfrum, J .

CHEMICAL PHYSICS LETTERS, 1996, 259 (3-4) :375-380

[8]

BROWNSWORD RA, 1997, UNPUB J PHYS CHEM

[9]

BROWNSWORD RA, IN PRESS

[10] Bond-selected chemistry: Vibrational state control of photodissociation and bimolecular reaction [J].

Crim, FF .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (31) :12725-12734

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