...
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Spectroscopic investigation of Al2N and its anion via negative ion photoelectron spectroscopy
【24h】

Spectroscopic investigation of Al2N and its anion via negative ion photoelectron spectroscopy

机译:负离子光电子能谱对Al2N及其阴离子的光谱学研究

获取原文
获取原文并翻译 | 示例
           

摘要

Negative ion photoelectron spectroscopy was used to elucidate the electronic and geometric structure of the gaseous Al2N/Al2N- molecules, using photodetachment wavelengths of 416 nm (2.977 eV), 355 nm (3.493 eV), and 266 nm (4.661 eV). Three electronic bands are observed and assigned to the X-2 Sigma(+)(u) <- X-1 Sigma(+)(g), A(2)Pi(u) <- X-1 Sigma(+)(g), and B-2 Sigma(+)(g) <- X-1 Sigma(+)(9) electronic transitions, with the caveat that one or both excited states may be slightly bent. With the aid of density functional theory calculations and Franck-Condon spectral simulations, we determine the adiabatic electron affinity of Al2N, 2.571 +/- 0.008 eV, along with geometry changes upon photodetachment, vibrational frequencies, and excited-state term energies. Observation of excitation of the odd vibrational levels of the antisymmetric stretch (v(3)) suggests a breakdown of the Franck-Condon approximation, caused by the vibronic coupling between the X2Xu+ and B-2 Sigma(+)(g) electronic states through the v(3) mode.
机译:使用416 nm(2.977 eV),355 nm(3.493 eV)和266 nm(4.661 eV)的光解离波长,使用负离子光电子能谱来阐明气态Al2N / Al2N-分子的电子和几何结构。观察到三个电子带并分配给X-2 Sigma(+)(u)<-X-1 Sigma(+)(g),A(2)Pi(u)<-X-1 Sigma(+)( g)和B-2 Sigma(+)(g)<-X-1 Sigma(+)(9)电子跃迁,但要注意一个或两个激发态可能会略微弯曲。借助密度泛函理论计算和Franck-Condon光谱模拟,我们确定了Al2N的绝热电子亲和力2.571 +/- 0.008 eV,以及随着光解离,振动频率和激发态项能量的几何变化。观察到反对称拉伸(v(3))的奇数振动能级的激发表明,Franck-Condon近似的分解是由X2Xu +和B-2 Sigma(+)(g)电子态之间的振动耦合引起的。 v(3)模式。

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