激光启动的水分子在H-结合点之间穿
Jasper R Clarkson1, Esteban Baquero, V Alvin Shubert
1Department of Chemistry, 560 Oval Drive, Purdue University, West Lafayette, IN 47907-2084, USA.
Science (New York, N.Y.)
|February 5, 2005
概括
刺激排放 (SEP) 允许单个水分子在转型甲化物上的结位之间转移. 研究人员测量了这些转变的能量值,揭示了分子动力学的洞察力.
科学领域:
- 物理化学 物理化学
- 分子动力学分子动力学
- 频谱学是一种光谱学.
背景情况:
- 键在分子相互作用和反应中起着至关重要的作用.
- 了解分子异构化是控制化学过程的关键.
研究的目的:
- 通过使用刺激排放 (SEP) 来研究水分子在trans-formanilide上的光诱导异构化.
- 为了确定CO-bound和NH-bound状态之间的双向异构的能量值.
主要方法:
- 采用了两步激光激发方案与刺激排放 (SEP).
- 对CO结合或NH结合同质进行选择性激发.
- 测量了双向异构化的能量值.
主要成果:
- 对于CO-->NH异构的量化能量值 (796988 cm−1).
- 对于NH-->CO异构化的量化能量值 (750988 cm−1).
- 确定异构体 (-238 到 +192 cm-1) 之间的能量差异 (ΔE).
结论:
- SEP有效地诱导和探测水分子在结位之间转移.
- 测量的能量景观为理解异构化动态提供了关键数据.
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