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和亚化物分子Ga2H2和In2H2的形成和特征:矩阵隔离研究
Hans-Jörg Himmel1, Laurent Manceron, Anthony J Downs
1Institut für Anorganische Chemie der Universität Karlsruhe, Engesserstrasse, Geb. 30.45, 76128 Karlsruhe, Germany.
Journal of the American Chemical Society
|April 19, 2002
概括
和在固体中形成循环二化物. 这些新型金属化物经历了光诱导的异体化,并且可以在不同的波长下逆转.
科学领域:
- 无机化学 无机化学 无机化学
- 摄影化学的使用.
- 矩阵隔离光谱学 矩阵隔离光谱学
背景情况:
- 像Ga2和In2这样的二原子金属被研究了它们的反应性.
- 金属化物在催化和材料科学中很重要.
- 矩阵隔离技术允许在低温下研究反应性物种.
研究的目的:
- 合成和描述和的新型二桥式循环分子.
- 为了研究这些金属化物的光化学性质和异构化途径.
- 为了比较和化的反应性和光化学.
主要方法:
- 在12K的固体Ar中对Ga2和In2与H2,D2,HD或H2+D2进行矩阵分离.
- 红外 (IR) 光谱用于识别和表征.
- 紫外线和近红外光解以诱导和逆转异构化.
- 量子化学计算用于光谱解释.
主要成果:
- 循环Ga(μ-H) 2Ga自从Ga2和H2中自发形成.
- 循环In2和H2在In2和H2的紫外线照射 (365nm) 后形成的In2
- 这两种分子都具有平面的,D2h对称的二基桥架结构.
- 在绿光 (546 nm) 下,Ga(μ-H) 2Ga 在绿光 (546 nm) 下异构化为HGaGaH和H2GaGa.
- 在可见光下 (> 450 nm) 下,In 分离为HInInH和InH.
- 异构是通过UV (365nm) 或近IR (>700nm) 光解可逆的.
结论:
- 新的和的循环二化物已被合成和特征化.
- 这些金属化物表现出明显的光化学反应性和异构化途径.
- 该研究提供了对低价值主要组金属化物基本化学的见解.
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