Photodissociation of IO (355 nm) and OIO (532 nm): Quantum yields for O(3P) and I(2PJ) production
Photodissociation of IO (355 nm) and OIO (532 nm): Quantum yields for O(3P) and I(2PJ) production
复制标题
IO (355 nm) 和 OIO (532 nm) 的光解：O(3P) 和 I(2PJ) 生产的量子产率
DOI：
10.1021/jp001166p
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发表时间：
2000
影响因子：
2.9
通讯作者：
J. Crowley
中科院分区：
文献类型：
--
作者：
T. Ingham;M. Cameron;J. Crowley
IO和OIO的光解研究使用2色，脉冲激光光解产生和这些物种的解离，结合通过共振荧光检测的产物原子。O（3 P）与I2、O（3 P）与CF 3 I、I（2 PJ）与O3反应生成IO自由基，并通过吸收光谱检测。以IO自身反应作为OIO的来源，并采用吸收光谱法进行检测。测量了IO在355 nm处光解后O（3 P）形成的量子产率相对于相同波长下NO2光解的量子产率，发现其为0.91 ± 0.91。在532 nm处OIO的光解中没有检测到O（3 P），这使我们能够将该波长处的量子产率上限定为7 × 10-3。I（2 PJ）在OIO的532 nm光解中被检测到，但仅在非常高的激光能量密度下形成，推测是在连续的双光子过程中。这些结果表明，OIO在其强可见光区可能是稳定的。
The photodissociation of IO and OIO was investigated using 2-color, pulsed laser photolytic generation and dissociation of these species, combined with the detection of product atoms by resonance fluorescence. IO radicals were generated in the reactions of O(3P) with I2, O(3P) with CF3I, and I(2PJ) with O3 and were detected by absorption spectroscopy. The self-reaction of IO was used as the source of OIO, which was also detected by absorption spectroscopy. The quantum yield of O(3P) formation following the photolysis of IO at 355 nm was measured relative to NO2 photolysis at the same wavelength and was found to be 0.91 ± . O(3P) was not detected in the photolysis of OIO at 532 nm, enabling us to place an upper limit to the quantum yield of 7 × 10-3 at this wavelength. I(2PJ)was detected in the 532-nm photolysis of OIO but was formed only at very high laser fluence, presumably in a sequential two-photon process. These results show that OIO is probably stable with respect to photolysis in its strong visible...