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Darr JP, Loomis RA. Probing the Dependence of Long-Range, Four-Atom Interactions on Intermolecular Orientation. 4. The Dissociation Dynamics of H 2/D 2···ICl(B, v′=3) and the Observation of Efficient Vibrational–Rotational Energy Transfer. J Phys Chem A 2022; 126:7916-7923. [DOI: 10.1021/acs.jpca.2c05817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joshua P. Darr
- Department of Chemistry, University of Nebraska at Omaha, 6001 Dodge St, DSC 337, Omaha, Nebraska 68182, United States
| | - Richard A. Loomis
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, MSC 1134-196-525, Saint Louis, Missouri 63130, United States
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2
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Nunzi F, Cesario D, Belpassi L, Tarantelli F, Roncaratti LF, Falcinelli S, Cappelletti D, Pirani F. Insight into the halogen-bond nature of noble gas-chlorine systems by molecular beam scattering experiments, ab initio calculations and charge displacement analysis. Phys Chem Chem Phys 2019; 21:7330-7340. [PMID: 30896694 DOI: 10.1039/c9cp00300b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have carried out molecular-beam scattering experiments and high-level ab initio investigations on the potential energy surfaces of a series of noble-gas-Cl2 adducts. This effort has permitted the construction of a simple, reliable and easily generalizable analytical model potential formulation, which is based on a few physically meaningful parameters of the interacting partners and transparently shows the origin, strength, and stereospecificity of the various interaction components. The results demonstrate quantitatively beyond doubt that the interaction between a noble-gas (Ng) atom - even He - and Cl2 in a collinear configuration is characterized by weak halogen bond (XB) formation, accompanied by charge transfer (CT) from the Ng to chlorine. This characteristic, which stabilizes the adduct, rapidly disappears on going towards the T-shaped configuration, dominated by pure van der Waals (vdW) forces. Similarly, a pure vdW interaction takes place - with no CT component in any configuration - if Cl2 is present in the lowest πg* → σu* excited state, because the change in electron density that accompanies the excitation eliminates the Cl2 polar flattening and σ hole, making the XB interaction inaccessible.
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Affiliation(s)
- Francesca Nunzi
- Dipartimento di Chimica, Biologia e Biotecnologie, via Elce di Sotto 8, I-06123 Perugia, Italy.
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3
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Li S, Zheng R, Chen SJ, Chen Y, Chen P. Investigations of the Rg-BrCl (Rg=He, Ne, Ar, Kr, Xe) binary van der Waals complexes: ab initio intermolecular potential energy surfaces, vibrational states and predicted pure rotational transition frequencies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 174:105-117. [PMID: 27888780 DOI: 10.1016/j.saa.2016.11.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 11/09/2016] [Accepted: 11/13/2016] [Indexed: 06/06/2023]
Abstract
The intermolecular potential energy surfaces (PESs) of the ground electronic state for the Rg-BrCl (Rg=He, Ne, Ar, Kr, Xe) van der Waals complexes have been constructed by using the coupled-cluster method in combination with the augmented quadruple-zeta correlation-consistent basis sets supplemented with an additional set of bond functions. The features of the anisotropic PESs for these complexes are remarkably similar, which are characterized by three minima and two saddle points between them. The global minimum corresponds to a collinear Rg-Br-Cl configuration. Two local minima, correlate with an anti-linear Rg-Cl-Br geometry and a nearly T-shaped structure, can also be located on each PES. The quantum bound state calculations enable us to investigate intermolecular vibrational states and rotational energy levels of the complexes. The transition frequencies are predicted and are fitted to obtain their corresponding spectroscopic constants. In general, the periodic trends are observed for this complex family. Comparisons with available experimental data for the collinear isomer of Ar-BrCl demonstrate reliability of our theoretical predictions, and our results for the other two isomers of Ar-BrCl as well as for other members of the complex family are also anticipated to be trustable. Except for the collinear isomer of Ar-BrCl, the data presented in this paper would be beneficial to improve our knowledge for these experimentally unknown species.
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Affiliation(s)
- Song Li
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou, People's Republic of China.
| | - Rui Zheng
- School of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou, People's Republic of China
| | - Shan-Jun Chen
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou, People's Republic of China
| | - Yan Chen
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou, People's Republic of China
| | - Peng Chen
- School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou, People's Republic of China
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4
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Makarem C, Loomis RA. Spectroscopic identification of the Ar⋯I2 intermolecular levels bound throughout the Ar + I2(B,ν′) potential. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.03.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Jabbari G, Sadri K, Cederbaum LS, Gokhberg K. Strong enhancement of cage effects in water photolysis caused by interatomic Coulombic decay. J Chem Phys 2016; 144:164307. [PMID: 27131550 DOI: 10.1063/1.4947238] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The impact of the solvent on the photodissociation of embedded molecules has been intensively investigated in the last decades. Collisions of photofragments with the solvating atoms or molecules can change their kinetic energy distribution or even lead to the de-excitation of the dissociating molecule to a bound electronic state quenching the dissociation. In this article we show that this cage effect is strongly enhanced if interatomic Coulombic decay (ICD) of the excited state becomes allowed. Ab initio calculations in H2O-Cl(-) cluster show that the ultra-fast dissociation of water in the à excited state is strongly quenched by ICD. We found that this very efficient quenching is due to two factors. First, the lifetimes of the à state due to ICD are short ranging between 6 and 30 fs. Second, nuclear dynamics is dominated by the chattering motion of the H atom between O and Cl(-) allowing ICD to act for longer times. We hope that this work will be an important first step in clarifying the impact of ICD on photodissociation of embedded molecules.
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Affiliation(s)
- Ghazal Jabbari
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| | - Keyvan Sadri
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| | - Lorenz S Cederbaum
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| | - Kirill Gokhberg
- Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
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6
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Structure and dynamics of noble gas-halogen and noble gas ionic clusters: When theory meets experiment. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2011.05.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Wei J, Makarem C, Reinitz AL, Darr JP, Loomis RA. Accurate measurement of the T-shaped and linear binding energies using vibronic-specific I2(B,ν) fragment velocity-map imaging. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2011.06.039] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Darr JP, Loomis RA, Ray-Helmus SE, McCoy AB. Probing the dependence of long-range, four-atom interactions on intermolecular orientation: 3. Hydrogen and iodine. J Phys Chem A 2011; 115:7368-77. [PMID: 21568302 DOI: 10.1021/jp201549d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Two-laser, action spectroscopy experiments have been performed in the I(2)B-X, υ'-0 spectral region on H(2)···I(2) and D(2)···I(2) complexes to investigate the dependence of the H(2)/D(2) + I(2) intermolecular interactions on orientation. The spectra contain features associated with at least two different conformers of the ground-state H(2)/D(2)···I(2)(X,υ'' = 0) complexes; one conformer has a preferred T-shaped geometry with the H(2)/D(2) moiety localized in a potential minimum that is orthogonal to the I-I bond axis, and the second conformer has a linear geometry with the H(2)/D(2) moiety positioned in minima at either end of the I(2) molecule, along the bond axis. Those features associated with complexes containing para-H(2)(j = 0), ortho-H(2)(j = 1), ortho-D(2)(j = 0), and para-D(2)(j = 1) are also assigned. The linear conformers are found to be more strongly bound than the T-shaped conformers with binding energies of 118.9(1.9) cm(-1) versus 91.3-93.3 cm(-1) for the ortho-H(2)···I(2) complexes and 144.2(2.1) cm(-1) versus 107.9 cm(-1) for the para-D(2)···I(2) complexes, respectively. Electronic structure calculations of the complexes containing ICl and I(2) with H(2), He, Ne, and Ar were performed to reveal the nature of the interactions and to shed insight into the origins of the different binding energies. The most stable minima in the H(2)/D(2) + I(2)(B,υ') excited-state potentials have T-shaped geometries. Calculated energies and probability amplitudes of the excited-state levels provide insight into the different excited-state intermolecular vibrational levels accessed by transitions of the two ground-state conformers.
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Affiliation(s)
- Joshua P Darr
- Department of Chemistry, Washington University-St. Louis, One Brookings Drive, CB 1134 Saint Louis, Missouri 63130, USA
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Chao JM, Tham KS, Zhang G, Merer AJ, Hsu YC, Hu WP. The C3-bending vibrational levels of the C3-Kr and C3-Xe van der Waals complexes studied by their Ã-X̃ electronic transitions and by ab initio calculations. J Chem Phys 2011; 134:074313. [PMID: 21341850 DOI: 10.1063/1.3506635] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Fluorescence excitation spectra and wavelength-resolved emission spectra of the C(3)-Kr and C(3)-Xe van der Waals (vdW) complexes have been recorded near the 2(2-)(0), 2(2+)(0), 2(4-)(0), and 1(1)(0) bands of the Ã(1)Π(u)-X̃(1)Σ(g)(+) system of the C(3) molecule. In the excitation spectra, the spectral features of the two complexes are red-shifted relative to those of free C(3) by 21.9-38.2 and 34.3-36.1 cm(-1), respectively. The emission spectra from the à state of the Kr complex consist of progressions in the two C(3)-bending vibrations (ν(2), ν(4)), the vdW stretching (ν(3)), and bending vibrations (ν(6)), suggesting that the equilibrium geometry in the X̃ state is nonlinear. As in the Ar complex [Zhang et al., J. Chem. Phys. 120, 3189 (2004)], the C(3)-bending vibrational levels of the Kr complex shift progressively to lower energy with respect to those of free C(3) as the bending quantum number increases. Their vibrational structures could be modeled as perturbed harmonic oscillators, with the dipole-induced dipole terms of the Ar and Kr complexes scaled roughly by the polarizabilities of the Ar and Kr atoms. Emission spectra of the Xe complex, excited near the Ã, 2(2-) level of free C(3), consist only of progressions in even quanta of the C(3)-bending and vdW modes, implying that the geometry in the higher vibrational levels (υ(bend) ≥ 4, E(vib) ≥ 328 cm(-1)) of the X̃ state is (vibrationally averaged) linear. In this structure the Xe atom bonds to one of the terminal carbons nearly along the inertial a-axis of bent C(3). Our ab initio calculations of the Xe complex at the level of CCSD(T)∕aug-cc-pVTZ (C) and aug-cc-pVTZ-PP (Xe) predict that its equilibrium geometry is T-shaped (as in the Ar and Kr complexes), and also support the assignment of a stable linear isomer when the amplitude of the C(3) bending vibration is large (υ(4) ≥ 4).
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Affiliation(s)
- Jun-Mei Chao
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan
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10
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Buchachenko A, Halberstadt N, Lepetit B, Roncero O. Ar ··· I 2 : A model system for complex dynamics. INT REV PHYS CHEM 2010. [DOI: 10.1080/0144235031000075726] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Alexei Buchachenko
- a Laboratory of Molecular Structure and Quantum Mechanics, Department of Chemistry , Moscow State University , Moscow , 119992 , Russia
| | - Nadine Halberstadt
- b LPQT-IRSAMC , Université Paul Sabatier and CNRS , 118 route de Narbonne, Toulouse , 31062 , France
| | - Bruno Lepetit
- c LCAR-IRSAMC , Université Paul Sabatier and CNRS , 118 route de Narbonne, Toulouse , 31062 , France
| | - Octavio Roncero
- d Instituto de Matemáticas y Física Fundamental , CSIC , Serrano 123, Madrid , 28006 , Spain
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11
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Baumfalk R, Buck U, Frischkorn C, Gandhi SR, Lauenstein C. Photodissociation and size analysis of (HBr)n clusters. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19971010338] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Bieler CR, Janda KC, Hernández-Lamoneda R, Roncero O. NeCl2 and ArCl2: transition from direct vibrational predissociation to intramolecular vibrational relaxation and electronic nonadiabatic effects. J Phys Chem A 2010; 114:3050-9. [PMID: 19754050 DOI: 10.1021/jp906392m] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Pump-probe results are reported for NeCl(2) excited to the Cl(2) B state, undergoing vibrational predissociation, and then probed via E <-- B transitions. Intensities, lifetimes and product vibrational branching ratios are reported for 16 < or = v' < or = 19 Cl(2) stretching quanta. The intensity of the signal rapidly decreases above v' = 17. Detailed wave packet calculations of the vibrational predissociation dynamics are performed to determine if the experimental results can be explained by the onset of IVR dynamics. The calculations and the experiment are in close accord for low vibrational levels. For higher levels, some, but not all, of the loss of experimental signal can be attributed to IVR. To test whether electronic relaxation dynamics are important for NeCl(2) and ArCl(2), excited state potential surfaces that incorporate spin orbit coupling effects are calculated. These surfaces are then used in a wave packet calculation that includes both vibrational predissociation and electronic predissociation dynamics. The results show that electronic predissociation is important for ArCl(2) levels above v' = 12. For NeCl(2) the calculation suggests that the onset of electronic predissociation should occur for levels as low as v' = 13 but may not contribute markedly to the observed loss of signal above v' = 17. Suggestions are made for further studies of this puzzling problem.
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Affiliation(s)
- Craig R Bieler
- Department of Chemistry, University of California, Irvine, California 92697, USA
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13
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Bernal-Uruchurtu MI, Hernández-Lamoneda R, Janda KC. On the Unusual Properties of Halogen Bonds: A Detailed ab Initio Study of X2−(H2O)1−5 clusters (X = Cl and Br). J Phys Chem A 2009; 113:5496-505. [DOI: 10.1021/jp900490p] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Ramón Hernández-Lamoneda
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Cuernavaca, 62209, México
| | - Kenneth C. Janda
- Department of Chemistry, University of California, Irvine, California 92697
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14
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Zhang Y, Vidma K, Parker DH, Loomis RA. Photodissociation of the linear Ar-I2 van der Waals complex: velocity-map imaging of the I2 fragment. J Chem Phys 2009; 130:104302. [PMID: 19292529 DOI: 10.1063/1.3075561] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Photodissociation of the Ar-I(2) 1:1 linear van der Waals complex is studied over the 490-520 nm region using the velocity-map imaging technique. Molecular iodine, and both the T-shaped and linear Ar-I(2)(X,v(")=0) ground-state complexes absorb strongly in this range, and these transitions access both the bound and dissociative regions of the I(2)(B) state. We measure the angle-speed distribution of vibrationally excited I(2)(B,v(')) state products by resonant 1+1 ionization via the E and f ion-pair states, forming I(2) (+), which is imaged under velocity-mapping conditions. The images show a strong angular anisotropy, which is the same for all excitation energies, spanning from the bound region to above the molecular dissociation limit. The observed angular anisotropy of the I(2) fragments is consistent with a direct dissociation of linear Ar-I(2) complexes promoted to the inner repulsive potential wall of the Ar+I(2)(B,v(')) potential energy surface.
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Affiliation(s)
- Yongwei Zhang
- Institute for Molecules and Materials, Radboud University Nijmegen, Heijendaalseweg 135, 6525 ED Nijmegen, The Netherlands
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15
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Pio JM, van der Veer WE, Bieler CR, Janda KC. Product state resolved excitation spectroscopy of He–, Ne–, and Ar–Br2 linear isomers: Experiment and theory. J Chem Phys 2008; 128:134311. [DOI: 10.1063/1.2885047] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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16
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Kautzman KE, Crider PE, Szpunar DE, Neumark DM. Dissociative photodetachment studies of I2-.Ar: coincident imaging of two- and three-body product channels. J Phys Chem A 2007; 111:12795-801. [PMID: 18027915 DOI: 10.1021/jp0765401] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Van der Waals clusters serve as prototypical systems for studying processes of energy transfer. The I2.Ar system has attracted particular interest due to the wide array of decay processes occurring in competition with one another. Here, we present systematic dissociative photodetachment (DPD) studies of the I2- and I2-.Ar anions in the region 4.24-4.78 eV. The resulting neutral fragments are detected by time- and position-sensitive (TPS) coincident imaging. Photofragment mass distributions and translational energy distributions from the DPD of I2- are presented and facilitate understanding of the I2.Ar system. For the I2.Ar complex, channels resulting from two-body dissociation leading to I2+Ar photoproducts are observed at all photon energies employed. We also report the first direct observation of the previously inferred three-body dissociation channel leading to I+I+Ar photoproducts. The relative intensities of each decay channel are investigated in relation to the electronic state being accessed. Translational energy distributions of the I2.Ar complex lend further insight into the decay mechanism for each channel.
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Affiliation(s)
- Kathryn E Kautzman
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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Cabrera J, Bieler CR, McKinney N, van der Veer WE, Pio JM, Janda K, Roncero O. Time and frequency resolved dynamics of ArBr2. J Chem Phys 2007; 127:164309. [DOI: 10.1063/1.2794332] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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18
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Lukashov S, Novikova I, Poretsky S, Pravilov A, Torgashkova A. Optical population of free iodine molecule ion-pair states and their RgI2(IP) complexes via RgI2 vdW complexes of valence states correlating with the third dissociation limit. Chem Phys 2007. [DOI: 10.1016/j.chemphys.2007.05.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Kerenskaya G, Goldschleger IU, Apkarian VA, Janda KC. Spectroscopic Signatures of Halogens in Clathrate Hydrate Cages. 1. Bromine. J Phys Chem A 2006; 110:13792-8. [PMID: 17181336 DOI: 10.1021/jp064523q] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the first UV-vis spectroscopic study of bromine molecules confined in clathrate hydrate cages. Bromine in its natural hydrate occupies 51262 and 51263 lattice cavities. Bromine also can be encapsulated into the larger 51264 cages of a type II hydrate formed mainly from tetrahydrofuran or dichloromethane and water. The visible spectra of the enclathrated halogen molecule retain the spectral envelope of the gas-phase spectra while shifting to the blue. In contrast, spectra of bromine in liquid water or amorphous ice are broadened and significantly more blue-shifted. The absorption bands shift by about 360 cm-1 for bromine in large 51264 cages of type II clathrate, by about 900 cm-1 for bromine in a combination of 51262 and 51263 cages of pure bromine hydrate, and by more than 1700 cm-1 for bromine in liquid water or amorphous ice. The dramatic shift and broadening in water and ice is due to the strong interaction of the water lone-pair orbitals with the halogen sigma* orbital. In the clathrate hydrates, the oxygen lone-pair orbitals are all involved in the hydrogen-bonded water lattice and are thus unavailable to interact with the halogen guest molecule. The blue shifts observed in the clathrate hydrate cages are related to the spatial constraints on the halogen excited states by the cage walls.
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Affiliation(s)
- Galina Kerenskaya
- Department of Chemistry, University of California-Irvine, Irvine, CA 92697, USA.
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20
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Resonant optical excitation of the I2 ion-pair states through the RgI2 complexes in the valence states correlating to the 2P1/2+2P1/2 limit. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.06.071] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Flachenecker G, Materny A. The elementary steps of the photodissociation and recombination reactions of iodine molecules enclosed in cages and channels of zeolite crystals: a femtosecond time-resolved study of the geometry effect. J Chem Phys 2006; 120:5674-90. [PMID: 15267445 DOI: 10.1063/1.1650298] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present femtosecond time-resolved pump-probe experiments on iodine molecules enclosed into well-defined cages and channels of different crystalline SiO2 modifications of zeolites. The new experimental results obtained from iodine in TON (Silica-ZSM-22), FER (Silica-Ferrierit), and MFI (Silicalit-1) porosils are compared with data published earlier on the iodine/DDR (Decadodecasil 3R) porosil system [Flachenecker et al., Phys. Chem. Chem. Phys. 5, 865 (2003)]. A summary of all findings is given. The processes analyzed by means of the ultrafast spectroscopy are the vibrational relaxation as well as the dissociation and recombination reactions, which are caused by the interaction of the photo-excited iodine molecules with the cavity walls of the porosils. A clear dependence of the observed dynamics on the geometry of the surrounding lattice structure can be seen. These measurements are supported by temperature-dependent experiments. Making use of a theoretical model which is based on the classical Langevin equation, an analysis of the geometry-reaction relation is performed. The Brownian dynamics simulations show that in contrast to the vibrational relaxation the predissociation dynamics are independent of the frequency of collisions with the surroundings. From the results obtained in the different surroundings, we conclude that mainly local fields are responsible for the crossing from the bound B state to the repulsive a/a' states of the iodine molecules.
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Affiliation(s)
- G Flachenecker
- International University Bremen, School of Engineering and Science, Campus Ring 8, D-28759 Bremen, Germany
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22
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Darr JP, Glennon JJ, Loomis RA. Observation of bound-free transitions of the linear Ar⋯I2(X,v″=0) complex in and above the I2B-X spectral region. J Chem Phys 2005; 122:131101. [PMID: 15847447 DOI: 10.1063/1.1885001] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Laser-induced fluorescence and action spectroscopy experiments were performed to identify the origin of the Ar...I(2) continuum signals observed in and above the I(2) B-X spectral region. We have verified that these signals arise from transitions of the linear Ar...I(2) (X,v"=0) complex. The data provides no evidence that the excited state complexes undergo a one-atom caging mechanism when prepared above the I(2)(B) dissociation limit, Ar...I(2) (B)*-->Ar+I+I*-->Ar+I(2)(B,v'). Instead, our results indicate that the continuum signals result from bound-free transitions of the linear Ar...I(2) X,v(")=0) complex to the inner repulsive walls of numerous Ar+I(2)(B,v') intermolecular potentials. The bound-free continuum signal associated with transitions to each Ar+I(2)(B,v') potential spans an energy region >700 cm(-1). We have found that the continuum signals turn-on 250(2)cm(-1) above the corresponding I(2) B-X,v'-0 band origin, and this energy represents the binding energy of the linear Ar...I(2) (X,v"=0) conformer, D(0) (")(L)=250(2)cm(-1).
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Affiliation(s)
- Joshua P Darr
- Department of Chemistry, Washington University, CB 1134 Saint Louis, MO 63130, USA
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23
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Bradke MD, Loomis RA. Spectroscopic observation of the preferentially stabilized, linear He⋯ICl(X [sup 1]Σ[sup +]) complex. J Chem Phys 2003. [DOI: 10.1063/1.1562622] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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McCaffery AJ, Marsh RJ. Vibrational predissociation of van der Waals molecules: An internal collision, angular momentum model. J Chem Phys 2002. [DOI: 10.1063/1.1516791] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bastida A, Zúñiga J, Requena A, Miguel B, Beswick JA, Vigué J, Halberstadt N. Molecular dynamics simulation of the I2(X)⋯Ar isomers population in a free-jet expansion: Thermodynamics versus kinetic control. J Chem Phys 2002. [DOI: 10.1063/1.1431275] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lepetit B, Roncero O, Buchachenko AA, Halberstadt N. Electronic and vibrational predissociation in ArI[sub 2] photodissociation dynamics. J Chem Phys 2002. [DOI: 10.1063/1.1471907] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Roncero O, Lepetit B, Beswick JA, Halberstadt N, Buchachenko AA. ArI2(X)→Ar+I2(B) photodissociation: Comparison between linear and T-shaped isomers dynamics. J Chem Phys 2001. [DOI: 10.1063/1.1401807] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Roncero O, Campos-Martı́nez J, Hernández MI, Delgado-Barrio G, Villarreal P, Rubayo-Soneira J. Photodissociation of NeBr2(B) below and above the dissociation limit of Br2(B). J Chem Phys 2001. [DOI: 10.1063/1.1386648] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bihary Z, Gerber RB, Apkarian VA. Vibrational self-consistent field approach to anharmonic spectroscopy of molecules in solids: Application to iodine in argon matrix. J Chem Phys 2001. [DOI: 10.1063/1.1384870] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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Burroughs A, Heaven MC. Dissociation dynamics of I2(B)–Ar: Rotational population distributions of I2(B,v) fragments from the T-shaped and linear complexes. J Chem Phys 2001. [DOI: 10.1063/1.1359771] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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Rohrbacher A, Halberstadt N, Janda KC. The dynamics of noble gas--halogen molecules and clusters. Annu Rev Phys Chem 2000; 51:405-33. [PMID: 11031288 DOI: 10.1146/annurev.physchem.51.1.405] [Citation(s) in RCA: 109] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The vibrational relaxation of noble gas-halogen van der Waals clusters has been fertile territory for the development of experimental and theoretical tools for state-to-state dynamics studies. Proceeding through the various combinations of noble gas atoms and halogen molecules, one goes from "simple" direct vibrational predissociation, through sequential relaxation pathways, to the statistical intramolecular vibrational relaxation limit. In some cases the vibrational processes dominate, in others electronically nonadiabatic processes, including chemical reactions, interfere. Thus the noble gas-halogen species provide test cases for most of the dynamical processes available to more "normal" molecules. This review discusses the current state-of-the-art for such studies and points to important problems that remain to be solved.
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Affiliation(s)
- A Rohrbacher
- Department of Chemistry, University of California, San Diego, La Jolla, California 92093-0332, USA
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Hernández MI, González-Lezana T, Delgado-Barrio G, Villarreal P, Buchachenko AA. Theoretical simulations of the He79Br2 B, v=8←X, v″=0 excitation spectrum: Spectroscopic manifestation of a linear isomer? J Chem Phys 2000. [DOI: 10.1063/1.1288793] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Hussain AN, Roberts G. Ultrafast Non-Adiabatic Curve Crossing and Energy Transfer in the IBr B0 +·Ar van der Waals Complex. J CHIN CHEM SOC-TAIP 2000. [DOI: 10.1002/jccs.200000110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Baumfalk R, Nahler NH, Buck U, Niv MY, Gerber RB. Photodissociation of HBr adsorbed on the surface and embedded in large Arn clusters. J Chem Phys 2000. [DOI: 10.1063/1.481798] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Buchachenko A, González-Lezana T, Hernández M, de Lara Castells M, Delgado-Barrio G, Villarreal P. Blueshifts of the B←X excitation spectra of He79Br2 using a DIM-based potential. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(99)01452-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Almy J, Kizer K, Zadoyan R, Apkarian VA. Resonant Raman, Hot, and Cold Luminescence of Iodine in Rare Gas Matrixes. J Phys Chem A 2000. [DOI: 10.1021/jp993238m] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- J. Almy
- Department of Chemistry, University of California, Irvine, California 92697-2025
| | - K. Kizer
- Department of Chemistry, University of California, Irvine, California 92697-2025
| | - R. Zadoyan
- Department of Chemistry, University of California, Irvine, California 92697-2025
| | - V. A. Apkarian
- Department of Chemistry, University of California, Irvine, California 92697-2025
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Stevens Miller AE, Chuang CC, Fu HC, Higgins KJ, Klemperer W. Dynamics of linear and T-shaped Ar–I2 dissociation upon B←X optical excitation: A dispersed fluorescence study of the linear isomer. J Chem Phys 1999. [DOI: 10.1063/1.480120] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Baumfalk R, Buck U, Frischkorn C, Nahler NH, Hüwel L. Photodissociation of HBr molecules and clusters: Anisotropy parameters, branching ratios, and kinetic energy distributions. J Chem Phys 1999. [DOI: 10.1063/1.479535] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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Burroughs A, Van Marter T, Heaven MC. The one-atom cage effect in I2(B)–Ar: Evidence that caging is inefficient for the T-shaped isomer. J Chem Phys 1999. [DOI: 10.1063/1.479525] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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NAUMKIN FY, McCOURT FRW. Is the Ar—Br2(X1Σ+g) van der Waals complex linear rather than T-shaped? A study in terms ofab initiobased potential energy surfaces. Mol Phys 1999. [DOI: 10.1080/00268979909483047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zamith S, Meier C, Halberstadt N, Beswick JA. Time-dependent wave packet study of the one atom cage effect in I2–Ar Van der Waals complexes. J Chem Phys 1999. [DOI: 10.1063/1.478141] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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Bastida A, Zuñiga J, Requena A, Halberstadt N, Beswick J. Competition between electronic and vibrational predissociation in Ar–I2(B): a molecular dynamics with quantum transitions study. Chem Phys 1999. [DOI: 10.1016/s0301-0104(98)00377-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Naumkin F. DIM models for RgX2− systems: suppressed influence of spin-orbit coupling and induced multipole effects for the Ar–I2− interaction. Chem Phys 1999. [DOI: 10.1016/s0301-0104(98)00356-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Isomeric structures, large amplitude intermolecular motions and electronic relaxation of the propynal–Ar complex. Chem Phys 1998. [DOI: 10.1016/s0301-0104(98)00338-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Ab initio-based potential energy surfaces and predicted microwave spectra of the Ar–I2(X1Σg+) Van der Waals complex. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)00806-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Higgins K, Tao FM, Klemperer W. The intermolecular potential between an inert gas and a halogen: Prediction and observation of transitions between the linear and T-shaped isomers of HeClF. J Chem Phys 1998. [DOI: 10.1063/1.476896] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Naumkin FY, McCourt FRW. Ab initio based potential energy surfaces, microwave spectrum, and scattering cross section of the ground state Ne–Cl2 system. J Chem Phys 1998. [DOI: 10.1063/1.476713] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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McCoy AB. Theoretical investigations of the lifetime of SH and SD (Ã 2Σ+) in M⋯SH/D (M=Ne,Ar,Kr) complexes. J Chem Phys 1998. [DOI: 10.1063/1.476546] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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