检索结果-南通市图书馆

Experimental and Density Functional Theory Calculation Studies on Raman and Infrared Spectra of 1,1＇-Binaphthyl-2,2＇-diamine

引用

Chinese Journal of Chemical Physics 2017年第1期30卷 7-15,I0001页

作者： Zhen-lin Zhang Wen-lou Wang Shi-lin Liu Dong-ming Chen Department of Chemical Physics University of Science and Technology of China Hefei 230026 China National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China

The IR absorption, visible excited normal Raman, and UV-excited near-resonant Raman （UVRR） spectra of 1,1＇-binaphthyl-2,2＇-diamine （BINAM） were measured and analyzed. Density functional theory calculations were carried out to investigate its vibrational frequencies, infrared absorption, normal Raman, and near-resonance Raman intensities. The observed Raman and IR bands of BINAM were assigned with respect to the local vibrations of substituted 2-naphthylamine. Several Raman bands of BINAM were found selectively enhanced in the UVRR in comparison with the normal Raman spectrum. Possible excited state geometry distortion was discussed based on the resonance Raman intensity analysis.

关键词： 1,1'-Binaphthyl-2,2'-diamine Resonance Raman Infrared Density functional theory molecular vibrations

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of the ratio of transition dipole moments on few-cycle pulse propagation

引用

Chinese Optics Letters 2008年第8期6卷 607-610页

作者：谭霞杨艳玲仝殿民樊锡君 College of Physics and Electronics Shandong Normal University

Propagation of a few-cycle laser pulses in a dense V-type three-level atomic medium is investigated based on full-wave Maxwell-Bloch equations by taking the near dipole-dipole （NDD） interaction into account. We find that the ratio, γ of the transition dipole moments has strong influence on the time evolution and split of the pulse： when γ≤ 1, the NDD interaction delays propagation and split of the pulse, and this phenomenon is more obvious when the value of γ is smaller; when γ =√2, the NDD interaction accelerates propagation and split of the pulse.

关键词： Electric dipole moments Maxwell equations molecular vibrations Wave equations

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A procedure of determining potential energy surfaces of triatomic molecules from inversion of spectroscopic data

引用

Chinese Journal of Chemistry 1995年第6期13卷 510-514页

作者： Xie, DQ Yan, GS Tian, AM SICHUAN UNIV DEPT CHEMCHENGDU 610064SICHUANPEOPLES R CHINA

In this paper, we have suggested an iterative procedure of optimization of the linear parameters in an analytic potential energy function for a triatomic molecule, by combining both variational and second order perturbation methods. The most important feature of this procedure is that the objective function is an analytical expression which can be optimized easily. The application to the water molecule is presented.

关键词： potential energy surface triatomic molecule molecular vibrations variational method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Photo-acoustic spectrum and detection of nitrogen dioxide

引用

Chinese Optics Letters 2005年第2期3卷 119-121页

作者：张贵银张连水韩晓峰 College of Physics Science and Technology Hebei University Baoding 071002 North China Electric Power University Baoding 071003 College of Physics Science and Technology Hebei University Baoding 071002

The photo-acoustic （PA） spectrum of nitrogen dioxide （NO2） in the range of 420 - 520 nm with a Nd：YAG pumped optical parametric generator and amplifier as radiation source is presented. The spectrum has a characteristic of banded structure superimposed on continuum. The banded structure of the spectrum can be assigned to NO2 B2B1← X^2A1 transition. While the continual one comes from the chaos states of the first excited state A^2B2 and the high vibration levels of the ground state X^2A1. The relationship of PA signal with buffer gas pressure and NO2 concentration is measured. The PA signal intensity increases with buffer gas pressure and almost is invariable when the buffer gas pressure is more than 3.00 × 10^4 Pa. The PA signal intensity has linearity with NO2 concentration. The detection limit is about 2×10^-5 on the basis of SNR = 1, however lower value of the detection limit can be expected by improving the apparatus properties.

关键词： Concentration (process) Light amplifiers molecular vibrations Nitrogen oxides Pressure Radiation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：