OH• + HCl Reaction at the Surface of a Water Droplet: An Ab Initio Molecular Dynamical Study

被引:20
作者
Mallick, Subhasish [1 ]
Kumar, Pradeep [1 ]
机构
[1] Malaviya Natl Inst Technol Jaipur, Dept Chem, Jaipur 302017, Rajasthan, India
关键词
HCL PLUS OH; MOLECULAR-DYNAMICS; RATE CONSTANTS; GAS-PHASE; CRIEGEE INTERMEDIATE; CHLORINE CHEMISTRY; HYDROXYL RADICALS; RATE COEFFICIENTS; WATER CLUSTERS; KINETICS;
D O I
10.1021/acs.jpcb.9b11813
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 Born-Oppenheimer molecular dynamics (BOMD) simulation has been performed to investigate the dynamics of the OH center dot + HCl reaction at the surface of a water droplet. The investigation suggests that the reaction occurred at the surface of the water droplet becomes almost 10 times faster than the corresponding gas-phase reaction. Besides, we have also performed the quantum mechanics/molecular mechanics calculation to calculate the unimolecular energy barrier of the reaction. The results indicate that the barrier height gets decreased by similar to 0.3 kcal mol(-1) at the surface of the water droplet, which also justifies the rate enhancement suggested by the BOMD simulation. The BOMD simulation also indicates that, at equilibrium, the product Cl-center dot forms four hydrogen bonds with four interfacial water molecules, which stabilize the Cl-center dot and resist it to escape from the surface.
引用
收藏
页码:2465 / 2472
页数:8
相关论文
共 79 条
[1]   Solid ammonium sulfate aerosols as ice nuclei:: A pathway for cirrus cloud formation [J].
Abbatt, J. P. D. ;
Benz, S. ;
Cziczo, D. J. ;
Kanji, Z. ;
Lohmann, U. ;
Moehler, O. .
SCIENCE, 2006, 313 (5794) :1770-1773
[2]   RATE CONSTANTS FOR THE GAS-PHASE REACTIONS OF ALKANES WITH CL ATOMS AT 296+/-2 K [J].
ASCHMANN, SM ;
ATKINSON, R .
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS, 1995, 27 (06) :613-622
[3]   Rate coefficients for the reactions of OH and OD with HCl and DCl between 200 and 400 K [J].
Battin-Leclerc, F ;
Kim, IK ;
Talukdar, RK ;
Portmann, RW ;
Ravishankara, AR .
JOURNAL OF PHYSICAL CHEMISTRY A, 1999, 103 (17) :3237-3244
[4]   Kinetics of the gas-phase reaction of OH with HCl [J].
Bryukov, MG ;
Dellinger, B ;
Knyazev, VD .
JOURNAL OF PHYSICAL CHEMISTRY A, 2006, 110 (03) :936-943
[5]   Water Effect on the OH plus HCl Reaction [J].
Buszek, Robert J. ;
Barker, John R. ;
Francisco, Joseph S. .
JOURNAL OF PHYSICAL CHEMISTRY A, 2012, 116 (19) :4712-4719
[6]   A TIME-RESOLVED LIF STUDY OF THE KINETICS OF OH(UPSILON=0) AND OH(UPSILON=1) WITH HCL AND HBR [J].
CANNON, BD ;
ROBERTSHAW, JS ;
SMITH, IWM ;
WILLIAMS, MD .
CHEMICAL PHYSICS LETTERS, 1984, 105 (04) :380-385
[7]   UNIFIED APPROACH FOR MOLECULAR-DYNAMICS AND DENSITY-FUNCTIONAL THEORY [J].
CAR, R ;
PARRINELLO, M .
PHYSICAL REVIEW LETTERS, 1985, 55 (22) :2471-2474
[8]   Atmospheric chlorine chemistry in southeast Texas: Impacts on ozone formation and control [J].
Chang, SY ;
Allen, DT .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2006, 40 (01) :251-262
[9]   Direct kinetic measurement of the reaction of the simplest Criegee intermediate with water vapor [J].
Chao, Wen ;
Hsieh, Jun-Ting ;
Chang, Chun-Hung ;
Lin, Jim Jr-Min .
SCIENCE, 2015, 347 (6223) :751-754
[10]   Multiple Time-Step Dual-Hamiltonian Hybrid Molecular Dynamics - Monte Carlo Canonical Propagation Algorithm [J].
Chen, Yunjie ;
Kale, Seyit ;
Weare, Jonathan ;
Dinner, Aaron R. ;
Roux, Benoit .
JOURNAL OF CHEMICAL THEORY AND COMPUTATION, 2016, 12 (04) :1449-1458