...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Chemical Physics >Infrared spectroscopy of jet-cooled HCCI singlet chlorocarbene diradical: CH stretching and vibrational coupling dynamics
【24h】

Infrared spectroscopy of jet-cooled HCCI singlet chlorocarbene diradical: CH stretching and vibrational coupling dynamics

机译：喷射冷却HCCI单氯酸氯苯甲酸的红外光谱：CH拉伸和振动耦合动力学

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Quantum shot noise limited laser absorption methods are used to obtain first high-resolution infrared rovibrational spectra of jet cooled chlorocarbene (HCC1) diradical in a supersonic slit-jet discharge expansion spectrometer. The rotationally resolved absorption spectra of the C-H stretch nu(1) fundamental are analyzed in the framework of a Watson non-rigid asymmetric rotor Hamiltonian model. Further analysis of the mid-infrared data reveals the additional presence of what has nominally been assigned as the (X) over tilde (012) combination band with one quantum of the H-C-Cl bend (nu(2)) and two quanta of the C-Cl stretch (2 nu(3)). Rovibrational constants are obtained from least squares fits for each of the four excited vibrational states built on the v(1)fundamental (X) over tilde (100) and the (X) over tilde (012) combination mode for each Cl-35 and (37)C1 atom isotopologue. The four bands occur within a narrow spectral window, requiring detailed comparison of multiple spectral properties (e.g., rotational constant dependence on vibrational excitation, band types/transition dipole moment alignment in the body-fixed frame, etc.) to aid in the vibrational assignment. Indeed, the IR transition intensities arise from strong anharmonic mixing between the "bright" nu(1) C-H stretch and "dark" (X) over tilde (012) H-C-Cl bend/C-Cl stretch combination modes, resulting in nearly equal amplitudes for the zeroth order (X) over tilde (100) and 5C(012) harmonic states. Finally, to aid the spectral search for HCC1 in the interstellar medium, ground state two-line combination differences are combined with previous laser-induced fluorescence results to predict precision microwave transitions for HC(35)C1 and HC(37)C1. Published by AIP Publishing.
机译：量子喷射噪声限制激光吸收方法用于在超声波释放膨胀光谱仪中获得Diradical的第一高分辨率红外RovibrationAltation（HCC1）。在Watson非刚性不对称转子Hamiltonian模型的框架内分析了C-H拉伸Nu（1）基础的旋转分辨的吸收光谱。进一步分析中红外数据的进一步分析显示了与Tilde（012）组合带的标称被分配的附加存在，其中HC-CL弯曲（Nu（2））和两个量子C-Cl拉伸（2 Nu（3））。对于在v（1）基本（x）上的四个激发振动状态中的每个Tilde（100）和Tilde（x）上的每个CL-35和每个CL-35的组合模式的每个激发振动状态中的每一个获得振动常数。 （37）C1原子同位素。四个频带发生在窄频谱窗口内，需要详细比较多谱特性（例如，旋转恒定依赖于身体固定帧中的振动激励，带类型/转换偶极矩对调整等）以帮助振动分配辅助。实际上，IR过渡强度来自“明亮的”nu（1）Ch拉伸和“暗”（x）在薄玻璃（012）HC-CL弯曲/ C-CL拉伸组合模式之间的强烈anharmonic混合，导致几乎相等Zeroth阶（x）逐波（100）和5c（012）谐波状态的振幅。最后，为了帮助Intellerar介质中对HCC1的光谱搜索，地态两线组合差异与先前的激光诱导的荧光结果组合，以预测HC（35）C1和HC（37）C1的精密微波转变。通过AIP发布发布。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号