DISSOCIATIVE ELECTRON-ATTACHMENT IN WATER AND METHANOL (5-14 EV)
DISSOCIATIVE ELECTRON-ATTACHMENT IN WATER AND METHANOL (5-14 EV)
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DOI：
10.1039/ft9928802805
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发表时间：
1992-10-07
期刊：
影响因子：
--
通讯作者：
WALKER, IC
中科院分区：
文献类型：
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作者：
CURTIS, MG;WALKER, IC
通过解离电子附着（DA）到D2 O和CD 3 OD（以及一些部分氘化的甲醇）在三个共振区域（约100 nm）上产生的D-和O-离子的能量。6.5、8.5和10.5eV）。在水和甲醇中，在前两个共振上，最可能的D-离子能量接近最大可能，随后O-D键断裂以得到基态产物。在相同的两个共振在水中，O-离子出现在一个对称的解离伴随着最初的高度激发的D2，然后，在适当的能量阈值以上，由D原子。最高能量共振的解离途径尚未建立，但在甲醇中，现有的实验证据表明从相对长寿命的重排复合物（可能是CD 2 OD 2-）中解离。提请注意，比较是可能的，阴离子的解离行为（电子/分子共振态）和光解离的母中性状态之间的相似性。
Energies of D- and O- ions produced by dissociative electron attachment (DA) to D2O and CD3OD (and some partially deuteriated methanols) over three resonance regions (ca. 6.5, 8.5 and 10.5 eV) are reported. In both water and methanol over the first two resonances, the most probable D- ion energy is close to the maximum possible, following rupture of the O-D bond to give ground-state products. Over the same two resonances in water, O- ions appear to be produced in a symmetric dissociation accompanied initially by highly excited D2 and, then, above the appropriate energy threshold, by D atoms. Dissociative pathways for the highest energy resonances are not established, but in methanol, the available experimental evidence points to dissociation from a relatively long-lived, rearranged complex (possibly CD2OD2-). Attention is drawn, where comparison is possible, to similarities between the dissociative behaviour of anions (electron/molecule resonant states) and photodissociation of the parent neutral states.