Reactivity of iron atoms at low temperature.

Reactivity of iron atoms at low temperature.
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铁原子在低温下的反应性

DOI:
10.1021/jp5007704
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发表时间:
2014
期刊:
The journal of physical chemistry. A
影响因子:
--
通讯作者:
F. Huisken
F. Huisken
中科院分区:
--
文献类型:
--
作者:
S. A. Krasnokutski;F. Huisken

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我们研究了T = 0.37K时超流He液滴中铁原子和团簇与氧、乙炔和水分子的反应。对于所有的系统,形成弱结合的加合物被发现,但插入反应的铁到现有的分子键不能被观察到。通过质谱分析证实了FeOH 2和FeC 2 H2复合物的形成。然而,人们发现,在类似的条件下,铁原子与氧分子的反应导致稳定的中间反应产物,弱结合的线性FeO加合物,电子碰撞电离后经历完全解离。预期观察到的所有反应都不会在气相中进行。记录了Fe在He液滴中溶剂化的5D40 ← a5 D4原子跃迁的R2 PI谱。发现相对于气相位置的相对小的蓝移为120 cm-1。
We have studied the reactions of iron atoms and clusters with oxygen, acetylene, and water molecules in superfluid He droplets atT= 0.37 K. For all systems, the formation of weakly bound adducts was found, but the insertion reaction of iron into existing molecular bonds could not be observed. The formation of FeOH2and FeC2H2complexes was evidenced by mass spectrometry. However, it was found that the reaction of iron atoms with oxygen molecules under similar conditions leads to the stabilization of an intermediate reaction product, the weakly bound linear FeOO adduct, which undergoes complete dissociation upon electron impact ionization. All reactions observed are not expected to proceed in the gas phase. The R2PI spectrum of they5D40←a5D4atomic transition of Fe solvated in helium droplets was recorded. A relatively small blue shift of ∼120 cm–1with respect to the gas phase position was found.
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