PF+分子离子激发态的理论研究

2021-01-04 08:05刘晓军刘鑫鹏徐林轩王欢任晓辉李瑞杨研
高师理科学刊 2020年11期
关键词:李瑞王欢激发态

刘晓军,刘鑫鹏,徐林轩,王欢,任晓辉,李瑞,杨研

PF+分子离子激发态的理论研究

刘晓军1,刘鑫鹏1,徐林轩1,王欢1,任晓辉1,李瑞1,杨研2

(齐齐哈尔大学 1. 理学院,2. 教育督导室,黑龙江 齐齐哈尔 161006)

PF+;势能曲线;光谱常数;弗兰克-康登因子

1 计算方法

2 结果与讨论

2.1 PF+分子离子的态的势能曲线和光谱常数

参考Winger-Witmer规则,通过解离极限原子的电子状态确定分子的电子状态,即

图1 PF+分子离子的第一解离极限态的势能曲线

表1 PF+分子离子的Λ-S态的光谱常数

注:a Ref[6];b Ref[17].

表2 PF+分子离子的束缚态()的振动能级

续表

2.2 PF+分子离子的态电偶极距

图2 态的电偶极矩随核间距的变化

2.3 PF+分子离子的弗兰克-康登因子和爱因斯坦系数

表3 分子离子激发态跃迁的Franck-Condon因子

表4 分子离子的爱因斯坦系数

3 结论

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[2] Zhao Y,Setser D W.Quenching rate constants for NCl(b1Σ+)and PCl(b1Σ+)and radiative lifetimes of NCl(b1Σ+),PCl(b1Σ+)and PBr(b1Σ+)[J].J Chem Soc,Faraday Trans,1995,91:2979-2987

[3] Butcher V,Dyke J M,Lewis A E,et al.A study of the ground electronic states of the isoelectronic ions PF+and NCI+by vacuum ultraviolet photoelectron spectroscopy[J].J Chem Soc,Faraday Trans,1988,284:299-310

[4] Yu L,Bian W.Electronically excited-state properties and predissociation mechanisms of phosphorus monofluoride:A theoretical study including spin orbit coupling[J].The Journal of Chemical Physics,2012,137:014313-1-12

[5] Liu H,Shi D,Sun J,et al.Multireference configuration interaction study of the 27 low-lying states of the PF+cation Spectrochimica[J].Acta Part A:Molecular and Biomolecular Spectroscopy,2017,38:181-226

[6] Douglas A E,Frackowiak M.The Electronic Spectra of Pf and PF+[J].Can J Phys,1962,40:832-849

[7] Berkowitz J,Greene J P,Jr J F,et al.Bonding and ionization energies of NF and PF compounds[J].The Journal of Chemical Physics,1984,81:6166-6175

[8] Kim G-S,Hirst D M.Excited states of the PF+$ and NCl+$ ions:a theoretical treatment[J].Molecular Physics,1995,85:463-475

[9] Li Q-N,Zhao S-T,Zhang X-M,et al.A Precise Description of the Electronic Structures and Spin-Allowed Transition Properties of PF and Its Cation:All-Electron Configuration-Interaction Investigations Including Relativistic Effect[J].Chinese Phys Lett, 2015,32:73-103

[10] Werner H J,Knowles P J,Knizia G,et al. Molpro: a general purpose quantum chemistry program package[J].WIREs Comput Mol Sci,2012,2:242-253

[11] Werner H J,Knowles P J.A Second Order Multiconfiguration SCF Procedure with Optimum Convergence[J]. J Chem Phys,1985, 82:5053-5063

[12] Knowles P J,Werner H J.An Efficient Second-Order MCSCF Method for Long Configuration Expansions[J].Chem Phys Lett, 1985,115:259-267

[13] Werner H J,Knowles P J.An Efficient Internally Contracted Multiconfiguration-Reference Configuration Interaction Method[J].J Chem Phys,1988,89:5803-5814

[14] Knowles P J,Werner H J. An Efficient Method for the Evaluation of Coupling Coefficients in Configuration Interaction Calculations[J].Chem Phys Lett,1988,145:514-522

[15] Langhoff S R,Davidson E R.Configuration Interaction Calculations on the Nitrogen Molecule[J].Int J Quantum Chem,1974, 8:61-72

[16] Le Roy,LEVEL R J.A computer program for solving the radial Schrödinger equation for bound and quasibound levels[D].Chemical Physics Research Report CP-661,Ontario,Canada:University of Waterloo,2005

[17] Nguyen M T.Ab initio calculations on low-lying electronic states of the PX,PX+and PX-species(X = H,F and Cl)[J].Molecular Physics,1986,59,547-558

The oretical investigations on excited states of PF+

LIU Xiaojun1,LIU Xinpeng1,XU Linxuan1,WANG Huan1,REN Xiaohui1,LI Rui1,YANG Yan2

(1. School of Science,2. Office of Educational Supervision Organization,Qiqihar University,Qiqihar 161006,China)

PF+;potential energy curves;spectroscopic constants;Franck-Condon factor

O-561

A

10.3969/j.issn.1007-9831.2020.11.009

1007-9831(2020)11-0036-06

2020-08-22

黑龙江省教育厅项目(135209258);齐齐哈尔大学教育科学研究项目(2017026);齐齐哈尔大学学位与研究生教育教学改革研究项目(JGXM_QUG_2019011)

刘晓军(1972-),男,黑龙江齐齐哈尔人,副教授,硕士,从事分子光谱、光学研究.E-mail:liuxiaojun@qqhru.edu.cn

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