1
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Kunin A, Li WL, Neumark DM. Dynamics of electron attachment and photodissociation in iodide-uracil-water clusters via time-resolved photoelectron imaging. J Chem Phys 2018; 149:084301. [PMID: 30193511 DOI: 10.1063/1.5040673] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The dynamics of low energy electron attachment to monohydrated uracil are investigated using time-resolved photoelectron imaging to excite and probe iodide-uracil-water (I-·U·H2O) clusters. Upon photoexcitation of I-·U·H2O at 4.38 eV, near the measured cluster vertical detachment energy of 4.40 eV ± 0.05 eV, formation of both the dipole bound (DB) anion and valence bound (VB) anion of I-·U·H2O is observed and characterized using a probe photon energy of 1.58 eV. The measured binding energies for both anions are larger than those of the non-hydrated iodide-uracil (I-·U) counterparts, indicating that the presence of water stabilizes the transient negative ions. The VB anion exhibits a somewhat delayed 400 fs rise when compared to I-·U, suggesting that partial conversion of the DB anion to form the VB anion at early times is promoted by the water molecule. At a higher probe photon energy, 3.14 eV, I- re-formation is measured to be the major photodissociation channel. This product exhibits a bi-exponential rise; it is likely that the fast component arises from DB anion decay by internal conversion to the anion ground state followed by dissociation to I-, and the slow component arises from internal conversion of the VB anion.
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Affiliation(s)
- Alice Kunin
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Wei-Li Li
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Daniel M Neumark
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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2
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Jian FF, Liu E, Ma J. Encapsulation of Chloride-water cluster anion [Cl6(H2O)8]6- in a cage structure based [Cu(DMAP)4]2+ aggregation. Supramol Chem 2018. [DOI: 10.1080/10610278.2018.1490021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Fang Fang Jian
- Department of Chemical Enginerring, School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan, P. R. China
| | - E Liu
- Department of Chemical Enginerring, School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan, P. R. China
| | - Junying Ma
- Department of Chemical Enginerring, School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang, Henan, P. R. China
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3
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Jian FF, Liu E, Ma JY. Interesting fluorine anion water clusters [F−·(H2O)n] in metal complex crystals. CrystEngComm 2018. [DOI: 10.1039/c8ce00532j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three crystalline complexes containing fluorine anion water cluster were reported. The fluoride anions and water molecules are H-bonded to each other in an alternating fashion within the fluoride–water hybrid cluster, where a fluoride anion plays the important role.
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Affiliation(s)
- Fang Fang Jian
- School of Chemical Engineering and Pharmaceutics
- Henan University of Science and Technology
- Luoyang
- P. R. China
| | - E. Liu
- School of Chemical Engineering and Pharmaceutics
- Henan University of Science and Technology
- Luoyang
- P. R. China
| | - Jun Ying Ma
- School of Chemical Engineering and Pharmaceutics
- Henan University of Science and Technology
- Luoyang
- P. R. China
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4
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King SB, Stephansen AB, Yokoi Y, Yandell MA, Kunin A, Takayanagi T, Neumark DM. Electron accommodation dynamics in the DNA base thymine. J Chem Phys 2016; 143:024312. [PMID: 26178110 DOI: 10.1063/1.4923343] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The dynamics of electron attachment to the DNA base thymine are investigated using femtosecond time-resolved photoelectron imaging of the gas phase iodide-thymine (I(-)T) complex. An ultraviolet pump pulse ejects an electron from the iodide and prepares an iodine-thymine temporary negative ion that is photodetached with a near-IR probe pulse. The resulting photoelectrons are analyzed with velocity-map imaging. At excitation energies ranging from -120 meV to +90 meV with respect to the vertical detachment energy (VDE) of 4.05 eV for I(-)T, both the dipole-bound and valence-bound negative ions of thymine are observed. A slightly longer rise time for the valence-bound state than the dipole-bound state suggests that some of the dipole-bound anions convert to valence-bound species. No evidence is seen for a dipole-bound anion of thymine at higher excitation energies, in the range of 0.6 eV above the I(-)T VDE, which suggests that if the dipole-bound anion acts as a "doorway" to the valence-bound anion, it only does so at excitation energies near the VDE of the complex.
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Affiliation(s)
- Sarah B King
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Anne B Stephansen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 København Ø, Denmark
| | - Yuki Yokoi
- Department of Chemistry, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama City, Saitama 338-8570, Japan
| | - Margaret A Yandell
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Alice Kunin
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Toshiyuki Takayanagi
- Department of Chemistry, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama City, Saitama 338-8570, Japan
| | - Daniel M Neumark
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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5
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Mak CC, Peslherbe GH. New developments in first-principles excited-state dynamics simulations: unveiling the solvent specificity of excited anionic cluster relaxation and electron solvation. MOLECULAR SIMULATION 2014. [DOI: 10.1080/08927022.2014.945083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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6
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Mak CC, Peslherbe GH. Relaxation Pathways of Photoexcited Iodide–Methanol Clusters: A Computational Investigation. J Phys Chem A 2014; 118:4494-501. [DOI: 10.1021/jp503216m] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chun C. Mak
- Centre for Research in Molecular
Modeling and Department of Chemistry and Biochemistry, Concordia University, Montréal, Québec H4B 1R6, Canada
| | - Gilles H. Peslherbe
- Centre for Research in Molecular
Modeling and Department of Chemistry and Biochemistry, Concordia University, Montréal, Québec H4B 1R6, Canada
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7
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Yandell MA, King SB, Neumark DM. Decay dynamics of nascent acetonitrile and nitromethane dipole-bound anions produced by intracluster charge-transfer. J Chem Phys 2014; 140:184317. [DOI: 10.1063/1.4875021] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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8
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Sheu WS, Chiou MF. Effects of Iodine on the Relaxation Dynamics of a Photoexcited I–(H2O)4 Cluster. J Phys Chem A 2013; 117:13946-53. [DOI: 10.1021/jp406108r] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wen-Shyan Sheu
- Department
of Chemistry, Fu-Jen Catholic University, Xinzhuang, New Taipei City 24205, Taiwan, ROC
| | - Mong-Feng Chiou
- Department
of Chemistry, Fu-Jen Catholic University, Xinzhuang, New Taipei City 24205, Taiwan, ROC
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9
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Mak CC, Timerghazin QK, Peslherbe GH. Photoexcitation and Charge-Transfer-to-Solvent Relaxation Dynamics of the I–(CH3CN) Complex. J Phys Chem A 2013; 117:7595-605. [DOI: 10.1021/jp403586u] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Chun C. Mak
- Centre for
Research in Molecular Modeling (CERMM) and
Department of Chemistry and Biochemistry, Concordia University, 7141 Sherbrooke Street West, Montréal, Québec, Canada
H4B 1R6
| | - Qadir K. Timerghazin
- Centre for
Research in Molecular Modeling (CERMM) and
Department of Chemistry and Biochemistry, Concordia University, 7141 Sherbrooke Street West, Montréal, Québec, Canada
H4B 1R6
| | - Gilles H. Peslherbe
- Centre for
Research in Molecular Modeling (CERMM) and
Department of Chemistry and Biochemistry, Concordia University, 7141 Sherbrooke Street West, Montréal, Québec, Canada
H4B 1R6
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10
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Yandell MA, King SB, Neumark DM. Time-resolved radiation chemistry: photoelectron imaging of transient negative ions of nucleobases. J Am Chem Soc 2013; 135:2128-31. [PMID: 23350789 DOI: 10.1021/ja312414y] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Time-resolved photoelectron imaging has been utilized to probe the energetics and dynamics of the transient negative ion of the nucleobase uracil. This species was created through charge transfer from an iodide anion within a binary iodide-uracil complex using a UV pump pulse; the ensuing dynamics were followed by photodetachment with a near-IR probe pulse. The photoelectron spectra show two time-dependent features, one from probe-induced photodetachment of the transient anion state and another from very low energy electron signal attributed to autodetachment. The transient anion was observed to decay biexponentially with time constants of hundreds of femtoseconds and tens of picoseconds, depending on the excitation energy. These dynamics are interpreted in terms of autodetachment from the initially excited state and a second, longer-lived species relaxed by iodine loss. Hydrogen loss from the N1 position may also occur in parallel.
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Affiliation(s)
- Margaret A Yandell
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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11
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Neogi SG, Chaudhury P. Structure and spectroscopic aspects of water-halide ion clusters: A study based on a conjunction of stochastic and quantum chemical methods. J Comput Chem 2012; 34:471-91. [DOI: 10.1002/jcc.23156] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 09/01/2012] [Accepted: 09/07/2012] [Indexed: 01/17/2023]
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12
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Affiliation(s)
- Ryan M. Young
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| | - Daniel M. Neumark
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California
94720, United States
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13
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Mak CC, Timerghazin QK, Peslherbe GH. Photoinduced electron transfer and solvation dynamics in aqueous clusters: comparison of the photoexcited iodide-water pentamer and the water pentamer anion. Phys Chem Chem Phys 2012; 14:6257-65. [DOI: 10.1039/c2cp24099h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Yandell MA, Young RM, King SB, Neumark DM. Effects of Excitation Energy on the Autodetachment Lifetimes of Small Iodide-Doped ROH Clusters (R═H–, CH3–, CH3CH2−). J Phys Chem A 2011; 116:2750-7. [DOI: 10.1021/jp208016w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Margaret A. Yandell
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Ryan M. Young
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Sarah B. King
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Daniel M. Neumark
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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15
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Jian FF, Wang J, Huang LH, Wang X, Xiao HL. Two supramolecular microporous frameworks stabilized by hydroxyl anionic water cluster. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2010.03.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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17
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Affiliation(s)
- Xiyi Chen
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482;
| | - Stephen E. Bradforth
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482;
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18
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Bragg AE, Schwartz BJ. The ultrafast charge-transfer-to-solvent dynamics of iodide in tetrahydrofuran. 1. Exploring the roles of solvent and solute electronic structure in condensed-phase charge-transfer reactions. J Phys Chem B 2007; 112:483-94. [PMID: 18085770 DOI: 10.1021/jp076934s] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Although they represent the simplest possible charge-transfer reactions, the charge-transfer-to-solvent (CTTS) dynamics of atomic anions exhibit considerable complexity. For example, the CTTS dynamics of iodide in water are very different from those of sodide (Na-) in tetrahydrofuran (THF), leading to the question of the relative importance of the solvent and solute electronic structures in controlling charge-transfer dynamics. In this work, we address this issue by investigating the CTTS spectroscopy and dynamics of I- in THF, allowing us to make detailed comparisons to the previously studied I-/H2O and Na-/THF CTTS systems. Since THF is weakly polar, ion pairing with the counterion can have a substantial impact on the CTTS spectroscopy and dynamics of I- in this solvent. In this study, we have isolated "counterion-free" I- in THF by complexing the Na+ counterion with 18-crown-6 ether. Ultrafast pump-probe experiments reveal that THF-solvated electrons (e-THF) appear 380 +/- 60 fs following the CTTS excitation of "free" I- in THF. The absorption kinetics are identical at all probe wavelengths, indicating that the ejected electrons appear with no significant dynamic solvation but rather with their equilibrium absorption spectrum. After their initial appearance, ejected electrons do not exhibit any additional dynamics on time scales up to approximately 1 ns, indicating that geminate recombination of e-THF with its iodine atom partner does not occur. Competitive electron scavenging measurements demonstrate that the CTTS excited state of I- in THF is quite large and has contact with scavengers that are several nanometers away from the iodide ion. The ejection time and lack of electron solvation observed for I- in THF are similar to what is observed following CTTS excitation of Na- in THF. However, the relatively slow ejection time, the complete lack of dynamic solvation, and the large ejection distance/lack of recombination dynamics are in marked contrast to the CTTS dynamics observed for I- in water, in which fast electron ejection, substantial solvation, and appreciable recombination have been observed. These differences in dynamical behavior can be understood in terms of the presence of preexisting, electropositive cavities in liquid THF that are a natural part of its liquid structure; these cavities provide a mechanism for excited electrons to relocate to places in the liquid that can be nanometers away, explaining the large ejection distance and lack of recombination following the CTTS excitation of I- in THF. We argue that the lack of dynamic solvation observed following CTTS excitation of both I- and Na- in THF is a direct consequence of the fact that little additional relaxation is required once an excited electron nonadiabatically relaxes into one of the preexisting cavities. In contrast, liquid water contains no such cavities, and CTTS excitation of I- in water leads to local electron ejection that involves substantial solvent reorganization.
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Affiliation(s)
- Arthur E Bragg
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095-1569, USA
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19
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Kołaski M, Lee HM, Pak C, Kim KS. Charge-Transfer-to-Solvent-Driven Dissolution Dynamics of I-(H2O)2-5 upon Excitation: Excited-State ab Initio Molecular Dynamics Simulations. J Am Chem Soc 2007; 130:103-12. [DOI: 10.1021/ja072427c] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maciej Kołaski
- Department of Chemistry, Center for Superfunctional Materials, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea
| | - Han Myoung Lee
- Department of Chemistry, Center for Superfunctional Materials, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea
| | - Chaeho Pak
- Department of Chemistry, Center for Superfunctional Materials, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea
| | - Kwang S. Kim
- Department of Chemistry, Center for Superfunctional Materials, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea
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20
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Takahashi K, Takayanagi T. Direct dynamics simulations of photoexcited charge-transfer-to-solvent states of the I−(H2O)n (n=4, 5 and 6) clusters. Chem Phys 2007. [DOI: 10.1016/j.chemphys.2007.09.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Takayanagi T, Takahashi K. Direct dynamics simulations of photoexcited charge-transfer-to-solvent states of the I−(H2O)6 cluster. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.09.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Szpunar DE, Kautzman KE, Faulhaber AE, Neumark DM. Photofragment coincidence imaging of small I−(H2O)n clusters excited to the charge-transfer-to-solvent state. J Chem Phys 2006; 124:054318. [PMID: 16468880 DOI: 10.1063/1.2165202] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The photodissociation dynamics of small I-(H2O)n(n=2-5) clusters excited to their charge-transfer-to-solvent (CTTS) states have been studied using photofragment coincidence imaging. Upon excitation to the CTTS state, two photodissociation channels were observed. The major channel (approximately 90%) is a two-body process forming neutral I+(H2O)n photofragments, and the minor channel is a three-body process forming I+(H2O)n-1+H2O fragments. Both processes display translational energy [P(ET)] distributions peaking at ET=0 with little available energy partitioned into translation. Clusters excited to the detachment continuum rather than to the CTTS state display the same two channels with similar P(ET) distributions. The observation of similar P(ET) distributions from the two sets of experiments suggests that in the CTTS experiments, I atom loss occurs after autodetachment of the excited [I(H2O)n-]* cluster or, less probably, that the presence of the excess electron has little effect on the departing I atom.
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Affiliation(s)
- David E Szpunar
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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23
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Verlet JRR, Kammrath A, Griffin GB, Neumark DM. Electron solvation in water clusters following charge transfer from iodide. J Chem Phys 2005; 123:231102. [PMID: 16392904 DOI: 10.1063/1.2137314] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The dynamics following charge transfer to solvent from iodide to a water cluster are studied using time-resolved photoelectron imaging of I-(H2O)n and I-(D2O)n clusters with n< or =28. The results show spontaneous conversion, on a time scale of approximately 1 ps, from water cluster anions with surface-bound electrons to structures in which the excess electron is more strongly bound and possibly more internalized within the solvent network. The resulting dynamics provide valuable insight into the electron solvation dynamics in water clusters and the relative stabilities between recently observed isomers of water cluster anions.
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Affiliation(s)
- Jan R R Verlet
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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24
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Kammrath A, Verlet JRR, Bragg AE, Griffin GB, Neumark DM. Dynamics of Charge-Transfer-to-Solvent Precursor States in I-(water)n(n= 3−10) Clusters Studied with Photoelectron Imaging†. J Phys Chem A 2005; 109:11475-83. [PMID: 16354038 DOI: 10.1021/jp053422+] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The dynamics of charge-transfer-to-solvent states are studied in I- (H2O)(n=3-10) clusters and their deuterated counterparts using time-resolved photoelectron imaging. The photoelectron spectra for clusters with n > or = 5 reveal multiple time scales for dynamics after their electronic excitation. An increase in the vertical detachment energy (VDE) by several hundred millielectronvolts on a time scale of approximately 1 ps is attributed to stabilization of the excess electron, primarily through rearrangement of the solvent molecules, but a contribution to this stabilization from motion of the I atom cannot be ruled out. The VDE drops by approximately 50 meV on a time scale of tens of picoseconds; this is attributed to loss of the neutral iodine atom. Finally, the pump-probe signal decays with a time constant of 60 ps-3 ns, increasing with cluster size. This decay is commensurate with the growth of very slow electrons and is attributed to autodetachment. Smaller clusters (n = 3, 4) display simpler dynamics. Anisotropy parameters are reported for clusters n = 4-9.
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Affiliation(s)
- Aster Kammrath
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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25
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Kołaski M, Lee HM, Pak C, Dupuis M, Kim KS. Ab Initio Molecular Dynamics Simulations of an Excited State of X-(H2O)3 (X = Cl, I) Complex. J Phys Chem A 2005; 109:9419-23. [PMID: 16866390 DOI: 10.1021/jp0512816] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Upon excitation of Cl(-)(H(2)O)(3) and I(-)(H(2)O)(3) clusters, the electron transfers from the anionic precursor to the solvent, and then the excess electron is stabilized by polar solvent molecules. This process has been investigated using ab initio molecular dynamics (AIMD) simulations of excited states of Cl(-)(H(2)O)(3) and I(-)(H(2)O)(3) clusters. The AIMD simulation results of Cl(-)(H(2)O)(3) and I(-)(H(2)O)(3) are compared, and they are found to be similar. Because the role of the halogen atom in the photoexcitation mechanism is controversial, we also carried out AIMD simulations for the ground-state bare excess electron -- water trimer [e(-)(H(2)O)(3)] at 300 K, the results of which are similar to those for the excited state of X(-)(H(2)O)(3) with zero kinetic energy at the initial excitation. This indicates that the rearrangement of the complex is closely related to that of e(-)(H(2)O)(3), whereas the role of the halide anion is not as important.
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Affiliation(s)
- M Kołaski
- Department of Chemistry, Division of Molecular and Life Sciences, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang, 790-784, Korea
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26
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Cavity size effects on charge-transfer-to-solvent precursor excited states of internal halide water clusters X−(H2O)6. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.09.138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Affiliation(s)
- Albert Stolow
- Steacie Institute for Molecular Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6 Canada.
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28
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Sheu WS, Liu YT. Charge-transfer-to-solvent (CTTS) precursor states of X−(H2O)n clusters (X=Cl, Br, I). Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00780-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Abstract
This review provides a historical context for our understanding of the hydration shell surrounding halide ions and illustrates how the cluster systems can be used, in combination with theory, to elucidate the behavior of water molecules in direct contact with the anion. We discuss how vibrational predissociation spectroscopy, carried out with weakly bound argon atoms, has been employed to deduce the morphology of the small water networks attached to anions in the primary steps of hydration. We emphasize the importance of charge-transfer in the binary interaction, and discuss how this process affects the structures of the larger networks. Finally, we survey how the negatively charged water clusters (H2O)n(-) are providing a molecular-level perspective on how diffuse excess electrons interact with the water networks.
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Affiliation(s)
- William H Robertson
- Sterling Chemistry Laboratory, Department of Chemistry, Yale University, P.O. Box 208107, New Haven, CT 06520, USA.
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30
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Abstract
The problem of the binding of an excess electron to polar molecules and their clusters has long fascinated researchers. Although excess electrons bound to such species tend to be very extended spatially and to have little spatial overlap with the valence electrons of the neutral molecules, inclusion of electron correlation effects is essential for quantitatively describing the electron binding. The major electron correlation contribution may be viewed as a dispersion interaction between the excess electron and the electrons of the molecule or cluster. Recent work using a one-electron Drude model to describe excess electrons interacting with polar molecules is reviewed.
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Affiliation(s)
- Kenneth D Jordan
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA.
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Sobolewski AL, Domcke W. Photochemistry of HCl(H2O)4: Cluster Model of the Photodetachment of the Chloride Anion in Water. J Phys Chem A 2003. [DOI: 10.1021/jp021533s] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Affiliation(s)
- Pavel Jungwirth
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic and Center for Complex Molecular Systems and Biomolecules, Dolejškova 3, 18223 Prague 8, Czech Republic, and Department of Chemistry and Institute for Surface and Interface Science, University of California, Irvine, California 92697-2025
| | - Douglas J. Tobias
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic and Center for Complex Molecular Systems and Biomolecules, Dolejškova 3, 18223 Prague 8, Czech Republic, and Department of Chemistry and Institute for Surface and Interface Science, University of California, Irvine, California 92697-2025
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Timerghazin QK, Peslherbe GH. Theoretical investigation of charge transfer to solvent in photoexcited iodide–acetonitrile clusters. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)00029-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Reply to the comment on `Iodine effect on the relaxation pathway of photoexcited I−(H2O)n clusters' [Chem. Phys. L 335 (2001) 475]. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)00047-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Davis AV, Zanni MT, Weinkauf R, Neumark DM. Comment on `Iodine effect on the relaxation pathway of photoexcited I−(H2O)n clusters' [Chem. Phys. Lett. 335 (2001) 475]. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(01)01365-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bradforth SE, Jungwirth P. Excited States of Iodide Anions in Water: A Comparison of the Electronic Structure in Clusters and in Bulk Solution. J Phys Chem A 2002. [DOI: 10.1021/jp013068p] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Stephen E. Bradforth
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, and J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic and Center for Complex Molecular Systems and Biomolecules, Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Pavel Jungwirth
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-0482, and J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic and Center for Complex Molecular Systems and Biomolecules, Dolejškova 3, 18223 Prague 8, Czech Republic
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Vila FD, Jordan KD. Theoretical Study of the Dipole-Bound Excited States of I-(H2O)4. J Phys Chem A 2002. [DOI: 10.1021/jp013169n] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fernando D. Vila
- Department of Chemistry and Center for Molecular and Materials Simulations, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - Kenneth D. Jordan
- Department of Chemistry and Center for Molecular and Materials Simulations, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
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Kowal M, Gora RW, Roszak S, Leszczynski J. I−H2O and its neutral precursors: Similarities and differences. J Chem Phys 2001. [DOI: 10.1063/1.1412005] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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