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Effects of spin–orbit coupling on the electronic states and spectroscopic properties of tellurium monoxide molecule – A theoretical study. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.03.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Chattopadhyaya S, Nath A, Das KK. Theoretical investigation of electronic states and spectroscopic properties of tellurium selenide molecule employing relativistic effective core potentials. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 124:618-628. [PMID: 24509540 DOI: 10.1016/j.saa.2014.01.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 12/17/2013] [Accepted: 01/10/2014] [Indexed: 06/03/2023]
Abstract
Ab initio based relativistic configuration interaction calculations have been performed to study the electronic states and spectroscopic properties of tellurium selenide (TeSe) - the heaviest heteronuclear diatomic group 16-16 molecule. Potential energy curves of several spin-excluded (Λ-S) electronic states of TeSe have been constructed and spectroscopic constants of low-lying bound Λ-S states within 3.85 eV are reported in the first stage of calculations. The X(3)Σ(-), a(1)Δ and b(1)Σ(+) are found as the ground, first excited and second excited state, respectively, at the Λ-S level and all these three states are mainly dominated by …π(4)π(*2) configuration. The computed ground state dissociation energy is in very good agreement with the experimental results. In the next stage of calculations, effects of spin-orbit coupling on the potential energy curves and spectroscopic properties of the species are investigated in details and compared with the existing experimental results. After inclusion of spin-orbit coupling the X(3)(1)Σ(-)(0(+)) is found as the ground-state spin component of TeSe. The computed spin-orbit splitting between two components of X(3)Σ(-) state is 1285 cm(-1). Also, significant amount of spin-orbit splitting are found between spin-orbit components (Ω-components) of several other excited states. Transition moments of some important spin-allowed and spin-forbidden transitions are calculated from configuration interaction wave functions. The spin-allowed transition B(3)Σ(-)-X(3)Σ(-) and spin-forbidden transition b(1)Σ(+)(0(+))-X(3)(1)Σ(-)(0(+)) are found to be the strongest in their respective categories. Electric dipole moments of all the bound Λ-S states along with those of the two Ω-components of X(3)Σ(-) are also calculated in the present study.
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Affiliation(s)
- Surya Chattopadhyaya
- Department of Physics, Tripura University, Suryamaninagar 799022, Tripura, India.
| | - Abhijit Nath
- Department of Physics, Tripura University, Suryamaninagar 799022, Tripura, India
| | - Kalyan Kumar Das
- Department of Chemistry, Physical Chemistry Section, Jadavpur University, Kolkata 700032, India
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Chattopadhyaya S, Nath A, Das KK. Theoretical studies of the electronic spectrum of tellurium monosulfide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 112:283-289. [PMID: 23680513 DOI: 10.1016/j.saa.2013.04.060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Accepted: 04/11/2013] [Indexed: 06/02/2023]
Abstract
Ab initio based multireference singles and doubles configuration interaction (MRDCI) study including spin-orbit coupling is carried out to explore the electronic structure and spectroscopic properties of tellurium monosulfide (TeS) molecule by employing relativistic effective core potentials (RECP) and suitable Gaussian basis sets of the constituent atoms. Potential energy curves correlating with the lowest and second dissociation limit are constructed and spectroscopic constants (T(e), r(e), and ω(e)) of several low-lying bound Λ-S electronic states up to 3.68 eV of energy are computed. The binding energies and electric dipole moments (μ(e)) of the ground and the low-lying excited Λ-S states are also computed. The effects of the spin-orbit coupling on the electronic spectrum of the species are studied in details and compared with the available data. The transition probabilities of some dipole-allowed and spin-forbidden transitions are computed and radiative lifetimes of some excited states at lowest vibrational level are estimated from the transition probability data.
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Affiliation(s)
- Surya Chattopadhyaya
- Department of Physics, Tripura University, Suryamaninagar 799 022, Tripura, India.
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Giuliano BM, Bizzocchi L, Sanchez R, Villanueva P, Cortijo V, Sanz ME, Grabow JU. The rotational spectra, potential function, Born–Oppenheimer breakdown, and hyperfine structure of GeSe and GeTe. J Chem Phys 2011; 135:084303. [DOI: 10.1063/1.3624728] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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Barone G, Mastalerz R, Reiher M, Lindh R. Nuclear Quadrupole Moment of 119Sn. J Phys Chem A 2008; 112:1666-72. [DOI: 10.1021/jp710388t] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giampaolo Barone
- Dipartimento di Chimica Inorganica e Analitica, Università di Palermo, Viale delle Scienze, Parco d'Orleans II, 90128 Palermo, Italy, Laboratorium für Physikalische Chemie, ETH Zurich, Hönggerberg Campus, Wolfgang-Pauli-Strasse 10, CH-8093 Zurich, Switzerland, and Department of Theoretical Chemistry, Chemical Center, Lund University, P.O.B. 124, 221 00 Lund, Sweden
| | - Remigius Mastalerz
- Dipartimento di Chimica Inorganica e Analitica, Università di Palermo, Viale delle Scienze, Parco d'Orleans II, 90128 Palermo, Italy, Laboratorium für Physikalische Chemie, ETH Zurich, Hönggerberg Campus, Wolfgang-Pauli-Strasse 10, CH-8093 Zurich, Switzerland, and Department of Theoretical Chemistry, Chemical Center, Lund University, P.O.B. 124, 221 00 Lund, Sweden
| | - Markus Reiher
- Dipartimento di Chimica Inorganica e Analitica, Università di Palermo, Viale delle Scienze, Parco d'Orleans II, 90128 Palermo, Italy, Laboratorium für Physikalische Chemie, ETH Zurich, Hönggerberg Campus, Wolfgang-Pauli-Strasse 10, CH-8093 Zurich, Switzerland, and Department of Theoretical Chemistry, Chemical Center, Lund University, P.O.B. 124, 221 00 Lund, Sweden
| | - Roland Lindh
- Dipartimento di Chimica Inorganica e Analitica, Università di Palermo, Viale delle Scienze, Parco d'Orleans II, 90128 Palermo, Italy, Laboratorium für Physikalische Chemie, ETH Zurich, Hönggerberg Campus, Wolfgang-Pauli-Strasse 10, CH-8093 Zurich, Switzerland, and Department of Theoretical Chemistry, Chemical Center, Lund University, P.O.B. 124, 221 00 Lund, Sweden
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Bizzocchi L, Giuliano BM, Hess M, Grabow JU. The rotational spectra, potential function, Born-Oppenheimer breakdown, and magnetic shielding of SnSe and SnTe. J Chem Phys 2007; 126:114305. [PMID: 17381204 DOI: 10.1063/1.2710266] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The pure rotational spectra of 27 isotopic species of SnSe and SnTe have been measured in the frequency range of 5-24 GHz using a Fabry-Perot-type resonator pulsed-jet Fourier-transform microwave spectrometer. Gaseous samples of both chalcogenides were prepared by laser ablation of suitable target rods and were stabilized in supersonic jets of Ar. Global multi-isotopolog analyses of all available high-resolution data produced spectroscopic Dunham parameters Y01, Y11, Y21, Y31, Y02, and Y12 for both species, as well as Born-Oppenheimer breakdown (BOB) coefficients delta01 for Sn, Se, and Te. A direct fit of the same data sets to an appropriate radial Hamiltonian yielded analytic potential energy functions and BOB radial functions for the X 1Sigma+ electronic state of both SnSe and SnTe. Additionally, the magnetic hyperfine interaction produced by the dipolar nuclei 119Sn, 117Sn, 77Se, and 125Te was observed, yielding first determinations of the corresponding spin-rotation coupling constants.
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Affiliation(s)
- Luca Bizzocchi
- Dipartimento di Chimica G. Ciamician, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
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