Photofragment kinetic energy distributions have been measured for O+ fragments from the photodissociation of O3+ over the wavelength range from 4579 to 7525 Å, using a fast ion beam photofragment spectrometer. Three vibrational levels of the ground state of O3+ are observed, and vibrational spacings determined. The partition of energy into rotation and translation of the product O2 molecule is measured for transitions from each of these three vibrational levels. Partition of energy into vibration of the O2 photofragement is also observed. The polarization of the transition leading to dissociation is determined to be more nearly parallel than perpendicular. The results are interpreted in terms of the structure of O3+ and the dissociation process, and are compared with results from the photoionization of O3, and with theoretical calculations.
Investigation of the Reaction of O<sub>3</sub><sup>+</sup> with N<sub>2</sub> and O<sub>2</sub> from 100 to 298 K
作者:Anthony J. Midey、Skip Williams、Thomas M. Miller、Patrick T. Larsen、A. A. Viggiano
DOI:10.1021/jp020311r
日期:2002.12.1
s - 1 at 298K. However, a N 2 O 3 + intermediate postulated to be involved in the reaction has been observed at 100 K, in agreement with the previous experimental and theoretical results. Rate constants for the reaction of O 3 + with O 2 at 100 and 298K have also been measured in the VT-SIFT. The O 2 reaction rate constants are 3.1 × 10 - 1 0 and 2.9 × 10 - 1 0 cm 3 s - 1 at 100 and 298K, respectively
O 3 + 与 N 2 和 O 2 的反应动力学已在 100 和 298 K 温度下在可变温度选择离子流管 (VT-SIFT) 中进行了研究。在 VT-SIFT 中测量的 O 3 + 与 N 2 反应的速率常数很慢,在两种温度下均以 <5 x 10 - 1 3 cm 3 s - 1 进行,这与 Cacace 等人最近的测量结果不一致。1 的总速率常数 ca。在 298 K 时为 1.7 x 10 - 1 0 cm 3 s - 1。然而,在 100 K 时已观察到假定参与反应的 N 2 O 3 + 中间体,这与先前的实验和理论结果一致。在 VT-SIFT 中也测量了 O 3 + 与 O 2 在 100 和 298 K 的反应速率常数。O 2 反应速率常数分别为 3.1 × 10 - 1 0 和 2.9 × 10 - 1 0 cm 3 s - 1 在 100 和 298 K 时,分别为 ca。朗之万碰撞速率常数的一半。当前结果与