VUV photoabsorption spectroscopy of sulphur dioxide in the 1400–1600Å region: Vibronic analysis of the system

Singh, P.; Shastri, Aparna; D’Souza, Richard; Rao, S. V. N. Bhaskara; Jagatap, B. N.

doi:10.1016/j.jqsrt.2011.11.007

Cited by 7 publications

(5 citation statements)

References 41 publications

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“…87,88,95 In single-photon absorption experiments, this absorption profile is thought to be associated with excitation to a number of the six or more singlet states that occur in this energetic window 87,95 (labelled states "Ẽ" in Fig. 3(a)).…”

Section: Interference From Two-pump-photon Excited State Relaxatiomentioning

confidence: 99%

“…In the case of the (2) 1 A 1 state, this assumption is supported by a number of multireference electronic structure calculations. 8,87,93,95 The adiabatic (2) 1 A 1 state of SO 2 forms a Renner-Teller pair 98,99 with the (B) 1 B 1 state, becoming degenerate and having 1 u symmetry at linear geometry. 8,93 We note that the (2) 1 A 1 state is unstable at the ground state equilibrium geometry, having a potential gradient leading to linearity along the bond angle coordinate (see Fig.…”

Section: Interference From Two-pump-photon Excited State Relaxatiomentioning

confidence: 99%

See 1 more Smart Citation

Excited state dynamics in SO2. I. Bound state relaxation studied by time-resolved photoelectron-photoion coincidence spectroscopy

Wilkinson

Boguslavskiy

Mikosch

et al. 2014

The Journal of Chemical Physics

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The excited state dynamics of isolated sulfur dioxide molecules have been investigated using the time-resolved photoelectron spectroscopy and time-resolved photoelectron-photoion coincidence techniques. Excited state wavepackets were prepared in the spectroscopically complex, electronically mixed (${\tilde{\rm B}}$B̃)1B1/(Ã)1A2, Clements manifold following broadband excitation at a range of photon energies between 4.03 eV and 4.28 eV (308 nm and 290 nm, respectively). The resulting wavepacket dynamics were monitored using a multiphoton ionisation probe. The extensive literature associated with the Clements bands has been summarised and a detailed time domain description of the ultrafast relaxation pathways occurring from the optically bright (${\tilde{\rm B}}$B̃)1B1 diabatic state is presented. Signatures of the oscillatory motion on the (${\tilde{\rm B}}$B̃)1B1/(Ã)1A2 lower adiabatic surface responsible for the Clements band structure were observed. The recorded spectra also indicate that a component of the excited state wavepacket undergoes intersystem crossing from the Clements manifold to the underlying triplet states on a sub-picosecond time scale. Photoelectron signal growth time constants have been predominantly associated with intersystem crossing to the (${\tilde{\rm c}}$c̃)3B2 state and were measured to vary between 750 and 150 fs over the implemented pump photon energy range. Additionally, pump beam intensity studies were performed. These experiments highlighted parallel relaxation processes that occurred at the one- and two-pump-photon levels of excitation on similar time scales, obscuring the Clements band dynamics when high pump beam intensities were implemented. Hence, the Clements band dynamics may be difficult to disentangle from higher order processes when ultrashort laser pulses and less-differential probe techniques are implemented.

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Section: Interference From Two-pump-photon Excited State Relaxatiomentioning

confidence: 99%

Section: Interference From Two-pump-photon Excited State Relaxatiomentioning

confidence: 99%

Excited state dynamics in SO2. I. Bound state relaxation studied by time-resolved photoelectron-photoion coincidence spectroscopy

Wilkinson

Boguslavskiy

Mikosch

et al. 2014

The Journal of Chemical Physics

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“…Электронное строение молекулы оксида серы (IV) была предметом анализа многочисленных публикаций (см., например, [15][16][17]). В основном состоянии в угловой молекуле SO 2 реализуется электронная конфигурация (5a 1 ) 2 (3b 2 ) 2 (6a 1 ) 2 (4b 2 ) 2 (7a 1 ) 2 (2b 1 ) 2 (5b 2 ) 2 (1a 2 ) 2 (8a 1 ) 2 , что приводит к ~X1A1 состоянию [18,19]. Низшая занятая МО (НЗМО) 5а 1 является сильно связывающей s-орбиталью: основной вклад в связывание вносит взаимодействие 3s-АО серы с симметричной s-орбиталью лигандов.…”

Section: электронное строение и кислотность по льюису оксида серы (Iv)unclassified

Molecular Complexes of Sulphur Dioxide With N,o-Containing Organic Bases (Review)

Khoma

Еннан

2016

Odesa National University Herald. Chemistry

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Физико-химический институт защиты окружающей среды и человека МОН и НАН Украины, ул. Преображенская 3, Одесса, 65082, Украина МОЛЕКУЛЯРНЫЕ КОМПЛЕКСЫ ОКСиДА СЕРЫ (IV) С n,o-СОДЕРЖАЩиМи ОРГАНиЧЕСКиМи ОСНОВАНиЯМи (ОБЗОР) Систематизированы и обобщены литературные данные по синтезу, стехиометрии, строению и относительной устойчивости молекулярных комплексов оксида серы (IV) c N,O-содержащими органическими основаниями. Особое внимание уделено механизмам образования комплексов с переносом заряда, в которых реализуется S←N-и S←Oсвязывание, а также ван-дер-ваальсовых комплексов. Отмечены корреляции между электронными, спектральными параметрами, строением, относительной устойчивостью и другими характеристиками образуемых соединений. Ключевые слова: оксид серы (IV), N,O-содержащие органические основания, комплексы с переносом заряда, ван-дер-ваальсовы комплексы.

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“…The valence-shell excitations of SO 2 have been widely studied by the photoabsorption method [9,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30], and references [15][16][17][18] concentrate on the energy level structures of SO 2 . The photoabsorption cross section or the equivalent optical oscillator strength density (OOSD) of SO 2 has been studied by a large number of photoabsorption experiments [9,[19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Oscillator strengths and integral cross sections of the valence-shell excitations of sulfur dioxide studied by fast electron impact

Wang

et al. 2020

J. Phys. B: At. Mol. Opt. Phys.

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The oscillator strengths and integral cross sections of the valence-shell excitations of SO2 have been determined at an incident electron energy of 1.5 keV and an energy resolution of about 70 meV, which are of great importance for modeling the planet’s atmospheric phenomena and astronomical observations. By comparing the present results with the previous electron scattering ones, it is found that at impact electron energies below 200 eV, the first Born approximation is not satisfied for the valence-shell excitations of SO2. The optical oscillator strengths have been obtained by extrapolating the GOSs to the limit of zero squared momentum transfer, and the integral cross sections have been determined systematically from the threshold to 5000 eV with the aid of the BE-scaling method. The present integral cross sections of the valence-shell excitations of SO2 can be used as important input parameters for models to extract the SO2 concentration in planet’s atmospheres.

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VUV photoabsorption spectroscopy of sulphur dioxide in the 1400–1600Å region: Vibronic analysis of the system

Cited by 7 publications

References 41 publications

Excited state dynamics in SO2. I. Bound state relaxation studied by time-resolved photoelectron-photoion coincidence spectroscopy

Excited state dynamics in SO2. I. Bound state relaxation studied by time-resolved photoelectron-photoion coincidence spectroscopy

Molecular Complexes of Sulphur Dioxide With N,o-Containing Organic Bases (Review)

Oscillator strengths and integral cross sections of the valence-shell excitations of sulfur dioxide studied by fast electron impact

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