原子与分子物理学报
原子與分子物理學報
원자여분자물이학보
CHINESE JOURNAL OF ATOMIC AND MOLECULAR PHYSICS
2015年
4期
538-542
,共5页
吴军%吴庆春%涂宏庆%崔云康%唐春红
吳軍%吳慶春%塗宏慶%崔雲康%唐春紅
오군%오경춘%도굉경%최운강%당춘홍
Franck-Condon分析%Duschinsky效应%光谱模拟%从头算/密度泛函
Franck-Condon分析%Duschinsky效應%光譜模擬%從頭算/密度汎函
Franck-Condon분석%Duschinsky효응%광보모의%종두산/밀도범함
Franck-Condon analysis%Duschinsky effect%Spectral simulation%Ab initio/DFT
基于ab initio/DFT理论,对磷基PH2分子X~2 B1态和PH2-阴离子X~1 A1态进行了几何结构优化和谐振频率计算.在B3LYP/6311+G(2d,p)理论水平下,通过Franck-Condon因子计算模拟了PH2-实验的光电子能谱,计算得到的理论谱与实验谱完全一致,确认属于PH2( X~2 B1)-PH2-( X~1 A1)光脱附过程.另外,通过迭代Franck-Condon分析,得到优于ab initio/DFT理论计算的PH2-离子的几何结构参数R( PH)=0.1438±0.0002 nm和∠(HPH)=92.2±0.2°.
基于ab initio/DFT理論,對燐基PH2分子X~2 B1態和PH2-陰離子X~1 A1態進行瞭幾何結構優化和諧振頻率計算.在B3LYP/6311+G(2d,p)理論水平下,通過Franck-Condon因子計算模擬瞭PH2-實驗的光電子能譜,計算得到的理論譜與實驗譜完全一緻,確認屬于PH2( X~2 B1)-PH2-( X~1 A1)光脫附過程.另外,通過迭代Franck-Condon分析,得到優于ab initio/DFT理論計算的PH2-離子的幾何結構參數R( PH)=0.1438±0.0002 nm和∠(HPH)=92.2±0.2°.
기우ab initio/DFT이론,대린기PH2분자X~2 B1태화PH2-음리자X~1 A1태진행료궤하결구우화화해진빈솔계산.재B3LYP/6311+G(2d,p)이론수평하,통과Franck-Condon인자계산모의료PH2-실험적광전자능보,계산득도적이론보여실험보완전일치,학인속우PH2( X~2 B1)-PH2-( X~1 A1)광탈부과정.령외,통과질대Franck-Condon분석,득도우우ab initio/DFT이론계산적PH2-리자적궤하결구삼수R( PH)=0.1438±0.0002 nm화∠(HPH)=92.2±0.2°.
Geometry optimization and harmonic vibrational frequency calculations have been performed on the X~2 B1 state of phosphino radical PH2 and X~1 A1 state of PH2-anion based on ab initio/DFT theory.The theoretical spectra obtained by employing B3LYP/6-311+G(2d,p) values are in excellent agreement with the observed photodetachment spectrum of phosphino radical.Additionally, the more reliable geometric parameters, R( PH)=0.1438 ±0.0002 nm and∠(HPH)=92.2 ±0.2°, of X~1 A1 state of PH2-anion are derived by employing an iterative Franck-Condon analysis procedure in the spectral simulation.