Production of the NH radical from the catalytic decomposition of NH3 on polycrystalline Pt and Fe surfaces at high temperatures
作者:Gary S. Selwyn、M.C. Lin
DOI:10.1016/0301-0104(82)85035-0
日期:1982.5
NH3 on polycrystalline platinum at temperatures >1200 K was found to result in desorption of the NH radical into the gas phase. The gaseous NH radical was detected by means of the laser-inducedfluorescence technique. The desorption process is one of several possible steps involving the surface-adsorbed NH radical. NH2 was not observed to desorb from the catalyst at all temperatures studied. The measured
Resonance-enhanced multiphoton ionisation spectroscopy of the NH(ND) radical. Part 1—The d<sup>1</sup>Σ<sup>+</sup>state
作者:Michael N. R. Ashfold、Simon G. Clement、Jonathan D. Howe、Colin M. Western
DOI:10.1039/ft9918702515
日期:——
observed when MPI occurs via a select subset of the d–a resonances. Parallels between the ionisation behaviour found in this present investigation and that seen in previous studies of two-photon resonant MPI of b1Σ+ statePH(PD) radicals suggest the need for a reassignment of the resonance-enhancing excited state of PH(PD).
Two-photon formation of NH/ND(A 3Π) in the 193 nm photolysis of ammonia. II. Photolysis of NH2
作者:R.D. Kenner、R.K. Browarzik、F. Stuhl
DOI:10.1016/0301-0104(88)87249-5
日期:1988.4
(ii) the dissociation i the NH2(2 2A1) state and (iii) the high rotational excitation of the NH(A3Π) results from the rotational excitation of the NH2‡(X 2B1). NH (A 3Π) formed in the 193nm photolyses of CH3NH2 and N2H4 and in the 172 nmphotolysi generated by mechanisms similar to that in the 193nmphotolysis of NH3.
The Reaction of N(2<sup>4</sup>S<sub>3⁄2</sub>) with Hydrogen Halides and Deuterium Iodide
作者:Hironobu Umemoto、Teruo Uchida、Shigeru Tsunashima、Shin Sato
DOI:10.1246/bcsj.60.1641
日期:1987.5
The bimolecular rate constants for the reactions of ground state atomic nitrogen with hydrogen halides and deuterium iodide were measured by employing a pulse radiolysis-resonance absorption technique. As for the reactions of hydrogen iodide and deuterium iodide, the temperature dependence was also measured; it was found that the rate constants were well expressed by the following Arrhenius expressions:
Leaving–atom isotope effect in the reactions of N(22D) with isotopic hydrogens
作者:Hironobu Umemoto
DOI:10.1016/s0009-2614(98)00693-9
日期:1998.8
The nascent internal statedistributions of NH(ND) radicals produced in the reaction of N(2DJ) with HD were measured and compared with those for analogous reactions with H2 and D2. There was no leaving-atom isotope effect in the rotationaldistributions of NH(v′′=0) and ND(v′′=0), except at highly rotationally excited levels near the thermochemical limits. The observed isotope effect at high rotational
测量了在N(2 D J)与HD反应中产生的NH(ND)自由基的新生内部状态分布,并将其与与H 2和D 2的类似反应进行比较。NH(v ''= 0)和ND(v ''= 0)的旋转分布中没有离开原子的同位素效应,除了在接近热化学极限的高度旋转激发能级之外。能量和角动量守恒可以解释在高旋转水平下观察到的同位素效应。在中低旋转水平上没有同位素效应表明过渡态是弯曲的H(D)–N–H(D)类型,其中H(D)–H(D)键断裂。