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Nascent distributions of ZnH and OH produced in the reactions of excited zinc and water

激发锌和水反应中产生的 ZnH 和 OH 的新生分布

基本信息

批准号：
05640562
负责人：
UMEMOTO Hironobu
金额：
$ 1.34万
依托单位：
Japan Advanced Institute of Science and Technology (1994)Tokyo Institute of Technology (1993)
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05640562/
关键词：
Zine Rotational Distribution Nascent Vibrational Distribution 脱励起過程

项目摘要

The reactions of Zn (4^1P_1) with hydride molecules such as water and alkanes were investigated. The nascent rotational and vibrational distributions of ZnH as well as OH were determined. From these disributions, it is possible to obtained information on the intermediate states of the reactions.In the case of water, the nascent state distributions of both products, ZnH and OH,were determined. The rotational distributions were both Boltzmann-like. However, the rotational temperatures were significatly different ; 12000K for ZnH and 900K for OH.ZnH was also vibrationally excited, peaking at upsiron^<''>=1. In contrast, no excitation in the OH vibration was observed. Such a non-statistical energy partitioning is explained by considering a short-lived Zn-H-OH intermediate in a non-linear geometry.The reactions of Zn (4^1P_1) with alkanes were also studied. The nascent rotational and vibrational state distributions of ZnH were compared with those predicted by statistical models. The distributions for C (CH_3) _4 resembled to the statistical ones, while those for simple alkanes were a little hotter than the statistical ones. These results suggest that the reaction proceeds via a relatively long-lived insertive complex. There was no great difference in the production yields of ZnH.The nascent vibrational state distributions of ZnH and ZnD produced in the reactions of Zn (4^1P_1) with H_2 (D_2) were much cooler than the statistical ones. These results are consistent with the insertive attack model proposed for other excited metal-H_2 systems. The quantum yield for the production of ZnH was measured to be low. Three-body dissociation processes must be more dominant than the production of ZnH.

研究了Zn(4^1P_1)与氢化物分子如水和烷烃的反应。确定了 ZnH 和 OH 的新生旋转和振动分布。从这些分布中，可以获得有关反应中间态的信息。对于水，确定了两种产物 ZnH 和 OH 的初生态分布。旋转分布都是类玻尔兹曼的。然而，旋转温度明显不同； ZnH 为 12000K，OH.ZnH 为 900K 也被振动激发，在 upsiron^<''>=1 处达到峰值。相反，没有观察到 OH 振动的激发。这种非统计能量分配可以通过考虑非线性几何中的短寿命 Zn-H-OH 中间体来解释。还研究了 Zn (4^1P_1) 与烷烃的反应。将 ZnH 的新生旋转和振动状态分布与统计模型预测的分布进行比较。 C(CH_3)_4的分布与统计分布相似，而简单烷烃的分布比统计分布稍热。这些结果表明反应是通过相对较长寿命的插入复合物进行的。 ZnH的产率没有太大差异。Zn(4^1P_1)与H_2(D_2)反应产生的ZnH和ZnD的初生振动态分布比统计分布要冷得多。这些结果与为其他激发金属-H_2 系统提出的插入攻击模型一致。测量 ZnH 生产的量子产率较低。三体解离过程一定比 ZnH 的产生更占主导地位。