248纳米处ClN3光解离产生的N3的两个光电离阈值：环状N3的进一步证据

Two photoionization thresholds of N3 produced by ClN3 photodissociation at 248 nm: further evidence for cyclic N3.

作者信息

Samartzis Peter C, Lin Jim Jr-Min, Ching Tao-Tsung, Chaudhuri Chanchal, Lee Yuan T, Lee Shih-Huang, Wodtke Alec M

机构信息

Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, USA.

出版信息

J Chem Phys. 2005 Aug 1;123(5):051101. doi: 10.1063/1.1993590.

DOI:10.1063/1.1993590

PMID:16108617

Abstract

We present results of near-threshold photoionization of N3 photofragments produced by laser photodissociation of ClN3 at 248 nm. The time of flight of recoiling N3 is used to resolve two photochemical channels producing N3, which exhibit different translational energy release. The two forms of N3 resolved in this way exhibit different photoionization thresholds, consistent with their assignment to linear (X 2pi(g)) and cyclic N3. This result agrees with the existing theoretical calculations of excited and ionic states of N3 and strengthens previous experimental results which suggested that the ClN3 photolysis produces a cyclic form of N3.

摘要

我们展示了通过248nm激光光解ClN₃产生的N₃光碎片的近阈值光电离结果。反冲N₃的飞行时间用于分辨产生N₃的两个光化学通道，这两个通道表现出不同的平动能释放。以这种方式分辨出的两种形式的N₃表现出不同的光电离阈值，这与它们被归属为线性（X²π(g)）和环状N₃一致。该结果与现有的N₃激发态和离子态的理论计算相符，并强化了先前的实验结果，即ClN₃光解产生环状形式的N₃。