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Spectroscopy of OH Fragments from the Photodissociation of HOCl at 266 and

机译:从HOCl的光解离在266和OH处得到的OH碎片的光谱

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Photofragment Doppler spectroscopy has been used to characterize the electronically excited states of HOCl in the ultraviolet region. In the photolysis of HOCl, the Doppler profile of the nascent OH fragments shows a marked difference in the recoil anisotropy parameters: β = 1.31 ± 0.12 at 266 nm and -0.70 ± 0.12 at 355 nm. Photoabsorption at 266 nm is characterized by the transition moment predominantly parallel to the O-Cl axis, which is consistent with assignment of the strong band at 250 nm to the 2~1A'-1~1A' transition. On the other hand, the transition moment at 355 nm is perpendicular to the O-Cl bond. The measurement of the notational alignment also shows the transition moment to be perpendicular to the molecular plane at 355 nm, indicating the existence of the 1~a" ← 1~1A' transition above 300 nm.
机译:光碎片多普勒光谱已用于表征紫外区域中HOCl的电子激发态。在HOCl的光解中,新生OH片段的多普勒轮廓在反冲各向异性参数上显示出显着差异:在266 nm处β= 1.31±0.12,在355 nm处β= -0.70±0.12。 266 nm处的光吸收的特征在于主要与O-Cl轴平行的跃迁矩,这与将250 nm的强谱带分配给2〜1A'-1〜1A'跃迁相一致。另一方面,在355 nm处的跃迁矩垂直于O-Cl键。符号排列的测量还显示在355 nm处跃迁矩垂直于分子平面,表明在300 nm以上存在1〜a“←1〜1A'跃迁。

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