Kinetics of the reaction NH2((X)over-tilde2B1, ν2=0 and 1)+NO

被引:9
作者
Yamasaki, K [1 ]
Watanabe, A [1 ]
Tanaka, A [1 ]
Sato, M [1 ]
Tokue, I [1 ]
机构
[1] Niigata Univ, Dept Chem, Niigata 9502181, Japan
关键词
D O I
10.1021/jp013306g
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 rate constants for reactions NH2((X) over tilde B-2(1), nu(2) = 0 and 1) + NO have been determined at 298 +/- 1 K using the pulsed UV photolysis/pulsed laser-induced fluorescence (LIF) technique. NH3 was photolyzed with an ArF excimer laser (193 nm), and NH2((X) over tilde B-2(1), nu(2) = 0 and 1) were detected by LIF in the (A) over tilde (2)A(1) - (X) over tilde B-2(1) system. It has been found that CF4 is efficient at vibrational relaxation of NH2, and the rate constant for deactivation of NH2((X) over tilde B-2(1), nu(2) = 1) by CF4 has been determined to be [3.2 +/- 0.5(2sigma)] x 10(-11)cm(3) molecule(-1) s(-1). Fast vibrational relaxation of NH2 by CF4 prior to the reaction with NO permits us to obtain an accurate rate constant for NH2((X) over tilde B-2(1), nu(2) = 0) + NO. The rate constant measured in N-2 buffer gas at I Torr is [2.05 +/- 0.1(2sigma)] x 10(-11) cm(3) molecule(-1) s(-1). The sources of discrepancy in previously reported room-temperature rate constants have been discussed on the basis of a survey of the experimental conditions and the methods of analysis. The overall rate constant for NH2((X) over tilde B-2(1), nu(2) = 1) + NO has been also obtained (without CF4) to be [2.6 +/- 0.4(2sigma)] x 10(-11) cm(3) molecule(-1) s(-1).
引用
收藏
页码:6563 / 6569
页数:7
相关论文
共 73 条
  • [1] ANDRESEN P, 1982, S INT COMBUST P, V19, P11
  • [2] [Anonymous], S INT COMBUST
  • [3] KINETIC MEASUREMENTS AND PRODUCT BRANCHING RATIO FOR THE REACTION NH2+NO AT 294-1027 K
    ATAKAN, B
    JACOBS, A
    WAHL, M
    WELLER, R
    WOLFRUM, J
    [J]. CHEMICAL PHYSICS LETTERS, 1989, 155 (06) : 609 - 613
  • [4] KINETICS OF THE GAS-PHASE REACTION NH2+NO IN THE TEMPERATURE-RANGE OF 294-1025-K
    ATAKAN, B
    WOLFRUM, J
    WELLER, R
    [J]. BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1990, 94 (11): : 1372 - 1375
  • [5] Benson S. W., 1960, FDN CHEM KINETICS
  • [6] STATE SELECTIVE PHOTODISSOCIATION DYNAMICS OF A STATE AMMONIA .2.
    BIESNER, J
    SCHNIEDER, L
    AHLERS, G
    XIE, XX
    WELGE, KH
    ASHFOLD, MNR
    DIXON, RN
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1989, 91 (05) : 2901 - 2911
  • [7] ON THE REACTION OF THE NH2 RADICAL WITH NO AT 295-620-K
    BULATOV, VP
    IOFFE, AA
    LOZOVSKY, VA
    SARKISOV, OM
    [J]. CHEMICAL PHYSICS LETTERS, 1989, 161 (02) : 141 - 146
  • [8] FOURIER-TRANSFORM INFRARED-SPECTRUM OF THE V2 BAND OF THE NH2 RADICAL
    BURKHOLDER, JB
    HOWARD, CJ
    MCKELLAR, ARW
    [J]. JOURNAL OF MOLECULAR SPECTROSCOPY, 1988, 127 (02) : 415 - 424
  • [9] AMMONIA DECOMPOSITION IN GLOW DISCHARGE
    CARBAUGH, DC
    MUNNO, FJ
    MARCHELL.JM
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1967, 47 (12) : 5211 - &
  • [10] VIBRATIONAL-RELAXATION OF ND2(0,1,0) RADICALS STUDIED BY FAST MAGNETIC-FIELD-JUMP TIME-RESOLVED LMR
    CHICHININ, AI
    KRASNOPEROV, LN
    [J]. CHEMICAL PHYSICS LETTERS, 1985, 115 (03) : 343 - 348