1
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Reinwardt S, Cieslik P, Buhr T, Perry-Sassmannshausen A, Schippers S, Müller A, Trinter F, Martins M. Isomer-specific photofragmentation of C 3H 3+ at the carbon K-edge. Phys Chem Chem Phys 2024; 26:15519-15529. [PMID: 38752716 DOI: 10.1039/d4cp00370e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
Individual fingerprints of different isomers of C3H3+ cations have been identified by studying photoionization, photoexcitation, and photofragmentation of C3H3+ near the carbon K-edge. The experiment was performed employing the photon-ion merged-beams technique at the photon-ion spectrometer at PETRA III (PIPE). This technique is a variant of near-edge X-ray absorption fine-structure spectroscopy, which is particularly sensitive to the 1s → π* excitation. The C3H3+ primary ions were generated by an electron cyclotron resonance ion source. C3Hn2+ product ions with n = 0, 1, 2, and 3 were observed for photon energies in the range of 279.0 eV to 295.2 eV. The experimental spectra are interpreted with the aid of theoretical calculations within the framework of time-dependent density functional theory. To this end, absorption spectra have been calculated for three different constitutional isomers of C3H3+. We find that our experimental approach offers a new possibility to study at the same time details of the electronic structure and of the geometry of molecular ions such as C3H3+.
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Affiliation(s)
- Simon Reinwardt
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Patrick Cieslik
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Ticia Buhr
- I. Physikalisches Institut, Justus-Liebig-Universität Gießen, Leihgesterner Weg 217, 35292 Gießen, Germany
| | | | - Stefan Schippers
- I. Physikalisches Institut, Justus-Liebig-Universität Gießen, Leihgesterner Weg 217, 35292 Gießen, Germany
| | - Alfred Müller
- I. Physikalisches Institut, Justus-Liebig-Universität Gießen, Leihgesterner Weg 217, 35292 Gießen, Germany
| | - Florian Trinter
- Molecular Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Michael Martins
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
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2
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Arildii D, Matsumoto Y, Dopfer O. Internal Energy Dependence of the Pyrrole Dimer Cation Structures Formed in a Supersonic Plasma Expansion: Charge-Resonance and Hydrogen-Bonded Isomers. J Phys Chem A 2024; 128:3993-4006. [PMID: 38741030 PMCID: PMC11129305 DOI: 10.1021/acs.jpca.4c01834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 04/29/2024] [Accepted: 05/01/2024] [Indexed: 05/16/2024]
Abstract
The structures of the pyrrole dimer cation (Py2+) formed in an electron-ionization-driven supersonic plasma expansion of Py seeded in Ar or N2 are probed as a function of its internal energy by infrared photodissociation (IRPD) spectroscopy in a tandem mass spectrometer. The IRPD spectra recorded in the CH and NH stretch ranges are analyzed by dispersion-corrected density functional theory (DFT) calculations at the B3LYP-D3/aug-cc-pVTZ level. The spectra of the cold Ar/N2-tagged Py2+ clusters, Py2+Ln (n = 1-5 for Ar, n = 1 for N2), indicate the exclusive formation of the most stable antiparallel π-stacked Py2+ structure under cold conditions, which is stabilized by charge-resonance interaction. The bare Py2+ dimers produced in the ion source have higher internal energy, and the observation of additional transitions in their IRPD spectra suggests a minor population of less stable hydrogen-bonded isomers composed of heterocyclic Py/Py+ structures formed after intramolecular H atom transfer and ring opening. These intermolecular isomers differ from the chemically bonded structures proposed earlier in the analysis of IRPD spectra of Py2+ generated by VUV ionization of neutral Pyn clusters.
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Affiliation(s)
- Dashjargal Arildii
- Institut
für Optik und Atomare Physik, Technische
Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany
| | - Yoshiteru Matsumoto
- Department
of Chemistry, Faculty of Science, Shizuoka
University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Otto Dopfer
- Institut
für Optik und Atomare Physik, Technische
Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany
- International
Research Frontiers Initiative, Tokyo Institute
of Technology, 4259 Nagatsuta-cho,
Midori-ku, Yokohama 226-8503, Japan
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3
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Ouyang Z, Xie C. Reinterpreting the vibrational structure in the electronic spectrum of the propargyl cation (H 2C 3H +) using an efficient and accurate quantum model. J Chem Phys 2021; 154:044308. [PMID: 33514083 DOI: 10.1063/5.0037571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The B̃1A1 ← X̃1A1 absorption spectra of propargyl cations H2C3H+ and D2C3D+ were simulated by an efficient two-dimensional (2D) quantum model, which includes the C-C stretch (v5) and the C≡C stretch (v3) vibrational modes. The choice of two modes was based on a scheme that can identify the active modes quantitively by examining the normal coordinate displacements (∆Q) directly based on the ab initio equilibrium geometries and frequencies of the X̃1A1 and B̃1A1 states of H2C3H+. The spectrum calculated by the 2D model was found to be very close to those calculated by all the higher three-dimensional (3D) quantum models (including v5, v3, and another one in 12 modes of H2C3H+), which validates the 2D model. The calculated B̃1A1 ← X̃1A1 absorption spectra of both H2C3H+ and D2C3D+ are in fairly good agreement with experimental results.
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Affiliation(s)
- Zheming Ouyang
- Institute of Modern Physics, Northwest University, Xian, Shaanxi 710127, China
| | - Changjian Xie
- Institute of Modern Physics, Northwest University, Xian, Shaanxi 710127, China
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4
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Chatterjee K, Dopfer O. Microhydration of protonated biomolecular building blocks: protonated pyrimidine. Phys Chem Chem Phys 2020; 22:13092-13107. [PMID: 32490447 DOI: 10.1039/d0cp02110e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Protonation and hydration of biomolecules govern their structure, conformation, and function. Herein, we explore the microhydration structure in mass-selected protonated pyrimidine-water clusters (H+Pym-Wn, n = 1-4) by a combination of infrared photodissociation spectroscopy (IRPD) between 2450 and 3900 cm-1 and density functional theory (DFT) calculations at the dispersion-corrected B3LYP-D3/aug-cc-pVTZ level. We further present the IR spectrum of H+Pym-N2 to evaluate the effect of solvent polarity on the intrinsic molecular parameters of H+Pym. Our combined spectroscopic and computational approach unequivocally shows that protonation of Pym occurs at one of the two equivalent basic ring N atoms and that the ligands in H+Pym-L (L = N2 or W) preferentially form linear H-bonds to the resulting acidic NH group. Successive addition of water ligands results in the formation of a H-bonded solvent network which increasingly weakens the NH group. Despite substantial activation of the N-H bond upon microhydration, no intracluster proton transfer occurs up to n = 4 because of the balance of relative proton affinities of Pym and Wn and the involved solvation energies. Comparison to neutral Pym-Wn clusters reveals the drastic effects of protonation on microhydration with respect to both structure and interaction strength.
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Affiliation(s)
- Kuntal Chatterjee
- Institut für Optik und Atomare Physik, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany.
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5
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Chatterjee K, Dopfer O. Unraveling the protonation site of oxazole and solvation with hydrophobic ligands by infrared photodissociation spectroscopy. Phys Chem Chem Phys 2019; 21:15157-15166. [DOI: 10.1039/c9cp02787d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Infrared spectroscopy reveals exclusive N-protonation of the oxazole ring and bifurcated or linear hydrogen bonding with hydrophobic N2and Ar ligands.
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Affiliation(s)
| | - Otto Dopfer
- Institut für Optik und Atomare Physik
- TU Berlin
- 10623 Berlin
- Germany
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6
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Chatterjee K, Dopfer O. Switching of binding site from nonpolar to polar ligands toward cationic benzonitrile revealed by infrared spectroscopy. J Chem Phys 2018; 149:174315. [DOI: 10.1063/1.5057430] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Kuntal Chatterjee
- Institut für Optik und Atomare Physik, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
| | - Otto Dopfer
- Institut für Optik und Atomare Physik, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
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7
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Klyne J, Dopfer O. Protonation and Sequential Microsolvation of 5-Hydroxyindole: Infrared Photodissociation Spectra of 5HIH+–Ln with L = Ar and N2 (n ≤ 3). J Phys Chem B 2018; 122:10700-10713. [DOI: 10.1021/acs.jpcb.8b09023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Johanna Klyne
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
| | - Otto Dopfer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
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8
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9
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Chin CH, Lin MY, Huang TP, Wu PZ, Wu YJ. Direct IR Absorption Spectra of Propargyl Cation Isolated in Solid Argon. Sci Rep 2018; 8:14392. [PMID: 30258064 PMCID: PMC6158168 DOI: 10.1038/s41598-018-32644-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 09/12/2018] [Indexed: 11/12/2022] Open
Abstract
The direct infrared (IR) absorption spectra of propargyl cations were recorded. These cations were generated via the electron bombardment of a propyne/Ar matrix sample during matrix deposition. Secondary photolysis with selected ultraviolet (UV) light was used for grouping the observed bands of various products. The band assignment of the propargyl cation in solid Ar was performed according by referring to the previous infrared photodissociation (IRPD) and velocity-map imaging photoelectron (VMI-PE) data, and via theoretical predictions of the anharmonic vibrational wavenumbers, band intensities, and deuterium-substituted isotopic ratios. Almost all the IR active bands with an observable intensity were recorded and the ν11 mode was reported for the first time.
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Affiliation(s)
- Chih-Hao Chin
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan
| | - Meng-Yeh Lin
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan
| | - Tzu-Ping Huang
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan
| | - Pei-Zhen Wu
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan
| | - Yu-Jong Wu
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan. .,Department of Applied Chemistry, National Chiao Tung University, 1001, Ta-Hsueh Road, Hsinchu, 30010, Taiwan.
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10
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Schütz M, Matsumoto Y, Bouchet A, Öztürk M, Dopfer O. Microsolvation of the pyrrole cation (Py+) with nonpolar and polar ligands: infrared spectra of Py+–Ln with L = Ar, N2, and H2O (n ≤ 3). Phys Chem Chem Phys 2017; 19:3970-3986. [DOI: 10.1039/c6cp07251h] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
IR spectra and dispersion-corrected density functional calculations of pyrrole cluster ions with Ar, N2, and H2O reveal the competition between H-bonding and π-stacking motifs of this prototypical heterocyclic aromatic cation in a hydrophobic and hydrophilic solvent.
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Affiliation(s)
- Markus Schütz
- Institut für Optik und Atomare Physik
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | | | - Aude Bouchet
- Institut für Optik und Atomare Physik
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | - Murat Öztürk
- Institut für Optik und Atomare Physik
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | - Otto Dopfer
- Institut für Optik und Atomare Physik
- Technische Universität Berlin
- 10623 Berlin
- Germany
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11
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Mosley JD, Young JW, Huang M, McCoy AB, Duncan MA. Infrared spectroscopy of the methanol cation and its methylene-oxonium isomer. J Chem Phys 2015; 142:114301. [DOI: 10.1063/1.4914146] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J. D. Mosley
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
| | - J. W. Young
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
| | - M. Huang
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - A. B. McCoy
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - M. A. Duncan
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
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12
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Schmies M, Miyazaki M, Fujii M, Dopfer O. Microhydrated aromatic cluster cations: Binding motifs of 4-aminobenzonitrile-(H2O)n cluster cations with n ≤ 4. J Chem Phys 2014; 141:214301. [DOI: 10.1063/1.4901893] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Matthias Schmies
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
| | - Mitsuhiko Miyazaki
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Masaaki Fujii
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Otto Dopfer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
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13
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Zhao D, Doney KD, Linnartz H. LABORATORY GAS-PHASE DETECTION OF THE CYCLOPROPENYL CATION (c-C
3
H
3
+
). ACTA ACUST UNITED AC 2014. [DOI: 10.1088/2041-8205/791/2/l28] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Mosley JD, Young JW, Duncan MA. Infrared spectroscopy of the acetyl cation and its protonated ketene isomer. J Chem Phys 2014; 141:024306. [DOI: 10.1063/1.4887074] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J. D. Mosley
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
| | - J. W. Young
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
| | - M. A. Duncan
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
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15
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Klyne J, Schmies M, Dopfer O. Microsolvation of the Formanilide Cation (FA+) in a Nonpolar Solvent: Infrared Spectra of FA+–Ln Clusters (L = Ar, N2; n ≤ 8). J Phys Chem B 2014; 118:3005-17. [DOI: 10.1021/jp5011988] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Johanna Klyne
- Institut für Optik
und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse
36, 10623 Berlin, Germany
| | - Matthias Schmies
- Institut für Optik
und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse
36, 10623 Berlin, Germany
| | - Otto Dopfer
- Institut für Optik
und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse
36, 10623 Berlin, Germany
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16
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Schmies M, Patzer A, Schütz M, Miyazaki M, Fujii M, Dopfer O. Microsolvation of the acetanilide cation (AA+) in a nonpolar solvent: IR spectra of AA+–Lnclusters (L = He, Ar, N2; n ≤ 10). Phys Chem Chem Phys 2014; 16:7980-95. [DOI: 10.1039/c4cp00401a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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George MAR, Savoca M, Dopfer O. Infrared Spectrum of the Si3H8+Cation: Evidence for a Bridged Isomer with an Asymmetric Three-Center Two-Electron SiHSi Bond. Chemistry 2013; 19:15315-28. [DOI: 10.1002/chem.201302189] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Indexed: 11/09/2022]
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18
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Savoca M, George MAR, Langer J, Dopfer O. Infrared spectrum of the disilane cation (Si2H6+) from Ar-tagging spectroscopy. Phys Chem Chem Phys 2013; 15:2774-81. [DOI: 10.1039/c2cp43773b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Schmies M, Patzer A, Kruppe S, Miyazaki M, Ishiuchi S, Fujii M, Dopfer O. Microsolvation of the 4‐Aminobenzonitrile Cation (ABN
+
) in a Nonpolar Solvent: IR Spectra of ABN
+
L
n
(L=Ar and N
2
,
n
≤4). Chemphyschem 2012. [DOI: 10.1002/cphc.201200790] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Matthias Schmies
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin (Germany)
| | - Alexander Patzer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin (Germany)
| | - Sarah Kruppe
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin (Germany)
| | - Mitsuhiko Miyazaki
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226‐8503 (Japan)
| | - Shun‐ichi Ishiuchi
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226‐8503 (Japan)
| | - Masaaki Fujii
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226‐8503 (Japan)
| | - Otto Dopfer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin (Germany)
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20
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Affiliation(s)
- Michael A. Duncan
- Department
of Chemistry, University of Georgia, Athens, Georgia 30602, United
States
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21
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Patzer A, Schütz M, Möller T, Dopfer O. Infrared Spectrum and Structure of the Adamantane Cation: Direct Evidence for Jahn-Teller Distortion. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108937] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Patzer A, Schütz M, Möller T, Dopfer O. Infrared Spectrum and Structure of the Adamantane Cation: Direct Evidence for Jahn-Teller Distortion. Angew Chem Int Ed Engl 2012; 51:4925-9. [DOI: 10.1002/anie.201108937] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Indexed: 11/08/2022]
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23
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Dopfer O, Andrei HS, Solcà N. IR Spectra of C2H5+-N2 Isomers: Evidence for Dative Chemical Bonding in the Isolated Ethanediazonium Ion. J Phys Chem A 2011; 115:11466-77. [DOI: 10.1021/jp208084r] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Otto Dopfer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany
| | - Horia-Sorin Andrei
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany
| | - Nicola Solcà
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany
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24
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Huang X, Taylor PR, Lee TJ. Highly Accurate Quartic Force Fields, Vibrational Frequencies, and Spectroscopic Constants for Cyclic and Linear C3H3+. J Phys Chem A 2011; 115:5005-16. [DOI: 10.1021/jp2019704] [Citation(s) in RCA: 122] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xinchuan Huang
- SETI Institute, 189 Bernardo Avenue, Suite 100, Mountain View, California 94043, United States
| | - Peter R. Taylor
- Victorian Life Sciences Computation Initiative and Department of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Timothy J. Lee
- NASA Ames Research Center, Moffett Field, California 94035-1000, United States
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25
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Hemberger P, Lang M, Noller B, Fischer I, Alcaraz C, Cunha de Miranda BK, Garcia GA, Soldi-Lose H. Photoionization of Propargyl and Bromopropargyl Radicals: A Threshold Photoelectron Spectroscopic Study. J Phys Chem A 2011; 115:2225-30. [DOI: 10.1021/jp112110j] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Patrick Hemberger
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Melanie Lang
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Bastian Noller
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Ingo Fischer
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Christian Alcaraz
- Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France
| | - Bárbara K. Cunha de Miranda
- Laboratoire de Chimie-Physique, UMR 8000 CNRS & Université Paris-Sud 11, F-91405 Orsay Cedex, France
- Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, 24210- 340, Niterói, RJ, Brazil
| | - Gustavo A. Garcia
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - Héloïse Soldi-Lose
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin - BP 48, F-91192 Gif-sur-Yvette Cedex, France
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26
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Botschwina P, Oswald R. On the equilibrium structures of the complexes H2C3H+·Ar and c-C3H3+·Ar: Results of explicitly correlated coupled cluster calculations. J Chem Phys 2011; 134:044305. [DOI: 10.1063/1.3525466] [Citation(s) in RCA: 10] [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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27
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Botschwina P, Oswald R, Dopfer O. Weak interactions in ion–ligand complexes of C3H+3 isomers: competition between H-bound and C-bound structures in c-C3H+3·L and H2CCCH+·L (L = Ne, Ar, N2, CO2, and O2). Phys Chem Chem Phys 2011; 13:14163-75. [DOI: 10.1039/c1cp20815b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Botschwina P, Oswald R, Rauhut G. Explicitly correlated coupled cluster calculations for the propargyl cation (H2C3H+) and related species. Phys Chem Chem Phys 2011; 13:7921-9. [DOI: 10.1039/c1cp20206e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Patzer A, Zimmermann M, Alata I, Jouvet C, Dopfer O. Electronic Spectra of Protonated Benzaldehyde Clusters with Ar and N2: Effect of ππ* Excitation on the Intermolecular Potential. J Phys Chem A 2010; 114:12600-4. [DOI: 10.1021/jp109949y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander Patzer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany, and Centre Laser de l’Université Paris Sud (EA. 4127) and Institut des Sciences Moleculaires d’Orsay CNRS (FRE 3363), Universite Paris-Sud 11, 91405 Orsay Cedex, France
| | - Max Zimmermann
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany, and Centre Laser de l’Université Paris Sud (EA. 4127) and Institut des Sciences Moleculaires d’Orsay CNRS (FRE 3363), Universite Paris-Sud 11, 91405 Orsay Cedex, France
| | - Ivan Alata
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany, and Centre Laser de l’Université Paris Sud (EA. 4127) and Institut des Sciences Moleculaires d’Orsay CNRS (FRE 3363), Universite Paris-Sud 11, 91405 Orsay Cedex, France
| | - Christophe Jouvet
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany, and Centre Laser de l’Université Paris Sud (EA. 4127) and Institut des Sciences Moleculaires d’Orsay CNRS (FRE 3363), Universite Paris-Sud 11, 91405 Orsay Cedex, France
| | - Otto Dopfer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany, and Centre Laser de l’Université Paris Sud (EA. 4127) and Institut des Sciences Moleculaires d’Orsay CNRS (FRE 3363), Universite Paris-Sud 11, 91405 Orsay Cedex, France
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Chakraborty S, Patzer A, Dopfer O. IR spectra of protonated benzaldehyde clusters, C7H7O+–Ln (L=Ar,N2;n≤2): Ion-ligand binding motifs of the cis and trans oxonium isomers. J Chem Phys 2010; 133:044307. [DOI: 10.1063/1.3460458] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Ricks AM, Douberly GE, Schleyer PVR, Duncan MA. Communications: Infrared spectroscopy of gas phase C3H3+ ions: The cyclopropenyl and propargyl cations. J Chem Phys 2010; 132:051101. [DOI: 10.1063/1.3298881] [Citation(s) in RCA: 47] [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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Prakash M, Subramanian V, Gadre SR. Stepwise Hydration of Protonated Carbonic Acid: A Theoretical Study. J Phys Chem A 2009; 113:12260-75. [DOI: 10.1021/jp904576u] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Prakash
- Chemical Laboratory, Central Leather Research Institute, Central Leather Research Institute, Adyar, Chennai 600 020, India, and Department of Chemistry, University of Pune, Pune 411 007, India
| | - V. Subramanian
- Chemical Laboratory, Central Leather Research Institute, Central Leather Research Institute, Adyar, Chennai 600 020, India, and Department of Chemistry, University of Pune, Pune 411 007, India
| | - Shridhar R. Gadre
- Chemical Laboratory, Central Leather Research Institute, Central Leather Research Institute, Adyar, Chennai 600 020, India, and Department of Chemistry, University of Pune, Pune 411 007, India
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Dopfer O. IR Spectroscopy of Microsolvated Aromatic Cluster Ions: Ionization-Induced Switch in Aromatic Molecule–Solvent Recognition. ACTA ACUST UNITED AC 2009. [DOI: 10.1524/zpch.219.2.125.57302] [Citation(s) in RCA: 130] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
IR spectroscopy, mass spectrometry, and quantum chemical calculations are employed to characterize the intermolecular interaction of a variety of aromatic cations (A+) with several types of solvents. For this purpose, isolated ionic complexes of the type A+–L
n
, in which A+ is microsolvated by a controlled number (n) of ligands (L), are prepared in a supersonic plasma expansion, and their spectra are obtained by IR photodissociation (IRPD) spectroscopy in a tandem mass spectrometer. Two prototypes of aromatic ion–solvent recognition are considered: (i) microsolvation of acidic aromatic cations in a nonpolar hydrophobic solvent and (ii) microsolvation of bare aromatic hydrocarbon cations in a polar hydrophilic solvent. The analysis of the IRPD spectra of A+–L dimers provides detailed information about the intermolecular interaction between the aromatic ion and the neutral solvent, such as ion–ligand binding energies, the competition between different intermolecular binding motifs (H-bonds, π-bonds, charge–dipole bonds), and its dependence on chemical properties of both the A+ cation and the solvent type L. IRPD spectra of larger A+–L
n
clusters yield detailed insight into the cluster growth process, including the formation of structural isomers, the competition between ion–solvent and solvent–solvent interactions, and the degree of (non)cooperativity of the intermolecular interactions as a function of solvent type and degree of solvation. The systematic A+–L
n
cluster studies are shown to reveal valuable new information about fundamental chemical properties of the bare A+ cation, such as proton affinity, acidity, and reactivity. Because of the additional attraction arising from the excess charge, the interaction in the A+–L
n
cation clusters differs largely from that in the corresponding neutral A–L
n
clusters with respect to both the interaction strength and the most stable structure, implying in most cases an ionization-induced switch in the preferred aromatic molecule–solvent recognition motif. This process causes severe limitations for the spectroscopic characterization of ion–ligand complexes using popular photoionization techniques, due to the restrictions imposed by the Franck–Condon principle. The present study circumvents these limitations by employing an electron impact cluster ion source for A+–L
n
generation, which generates predominantly the most stable isomer of a given cluster ion independent of its geometry.
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Patzer A, Knorke H, Langer J, Dopfer O. IR spectra of phenol+–(O2)n cation clusters (n=1–4): Hydrogen bonding versus stacking interactions. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.03.100] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Andrei HS, Nizkorodov S, Dopfer O. IR Spectra of Protonated Carbonic Acid and Its Isomeric H3O+⋅CO2 Complex. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200700750] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Andrei HS, Nizkorodov SA, Dopfer O. IR Spectra of Protonated Carbonic Acid and Its Isomeric H3O+⋅CO2 Complex. Angew Chem Int Ed Engl 2007; 46:4754-6. [PMID: 17487916 DOI: 10.1002/anie.200700750] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Horia-Sorin Andrei
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany
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de Souza ROMA, Esteves PM, Laali KK. Allenediazonium ions and their protonation chemistry: a DFT study. Org Biomol Chem 2006; 4:4444-52. [PMID: 17268637 DOI: 10.1039/b611304b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The parent allenediazonium monocation H2C[double bond]C[double bond]CH(N2+) and ten of its substituted derivatives XYC[double bond]C[double bond]C(Z)N2+ (with F, CF3, Me, OMe, and Me2N as substituents) were studied by DFT at the B3LYP/6-31++G** level. Except for the Me2N-substituted derivative that forms a monocation-N2 complex, structurally intact allenediazonium ions were obtained as minima in all cases. Protonation studies at various sites were performed on allenediazonium cations, and relative energies of the resulting minima were used to identify the energetically most favored dications. In the majority of cases, protonation at the central carbon of the allenic moiety (C2) is most favored, forming delocalized allyl cation-N2+ species. The same dication structure is formed via initial C3-protonation, followed by a formal hydride shift, in cases where a carbocation-stabilizing group is placed at C3. When a CF3 group is placed at C3, initial protonation at C1 resulted in a 1,3-fluorine shift, to generate a fluoroallyl cation linked to a CH2N2+ moiety. Structural features in the allenediazonium monocations and their protonated dications were examined, taking into account their geometrical features, computed charges, and the GIAO NMR shifts.
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Pasker FM, Solcà N, Dopfer O. Spectroscopic Identification of Carbenium and Ammonium Isomers of Protonated Aniline (AnH+): IR Spectra of Weakly Bound AnH+−Ln Clusters (L = Ar, N2). J Phys Chem A 2006; 110:12793-804. [PMID: 17125293 DOI: 10.1021/jp064571a] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Infrared photodissociation (IRPD) spectra of mass-selected clusters composed of protonated aniline (C6H8N+ = AnH+) and a variable number of neutral ligands (L = Ar, N2) are obtained in the N-H stretch range. The AnH+ -Ln complexes (n < or = 3) are produced by chemical ionization in a supersonic expansion of An, H2, and L. The IRPD spectra of AnH+-Ln feature the unambiguous fingerprints of at least two different AnH+ nucleation centers, namely, the ammonium isomer (5) and the carbenium ions (1 and/or 3) corresponding to protonation at the N atom and at the C atoms in the para and/or ortho positions, respectively. Protonation at the meta and ipso positions is not observed. Both classes of observed AnH+-Ln isomers exhibit very different photofragmentation behavior upon vibrational excitation arising from the different interaction strengths of the AnH+ cores with the surrounding neutral ligands. Analysis of the incremental N-H stretch frequency shifts as a function of cluster size shows that microsolvation of both 5 and 1/3 in Ar and N2 starts with the formation of intermolecular H bonds of the ligands to the acidic NH protons and proceeds by intermolecular pi bonding to the aromatic ring. The analysis of both the photofragmentation branching ratios and the N-H stretch frequencies demonstrates that the N-H bonds in 5 are weaker and more acidic than those in 1/3, leading to stronger intermolecular H bonds with L. The interpretation of the spectroscopic data is supported by density functional calculations conducted at the B3LYP level using the 6-31G* and 6-311G(2df,2pd) basis sets. Comparison with clusters of neutral aniline and the aniline radical cation demonstrates the drastic effect of protonation and ionization on the acidity of the N-H bonds and the topology of the intermolecular potential, in particular on the preferred aromatic substrate-nonpolar ligand recognition motif.
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Affiliation(s)
- Felix M Pasker
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany
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Andrei HS, Solcà N, Dopfer O. Interaction of Ionic Biomolecular Building Blocks with Nonpolar Solvents: Acidity of the Imidazole Cation (Im+) Probed by IR Spectra of Im+−Ln Complexes (L = Ar, N2; n ≤ 3). J Phys Chem A 2005; 109:3598-607. [PMID: 16839026 DOI: 10.1021/jp0441487] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The intermolecular interaction between the imidazole cation (Im+ = C3N2H4+) and nonpolar ligands is characterized in the ground electronic state by infrared photodissociation (IRPD) spectroscopy of size-selected Im+-Ln complexes (L = Ar, N2) and quantum chemical calculations performed at the UMP2/6-311G(2df,2pd) and UB3LYP/6-311G(2df,2pd) levels of theory. The complexes are created in an electron impact cluster ion source, which predominantly produces the most stable isomers of a given cluster ion. The analysis of the size-dependent frequency shifts of both the N-H and the C-H stretch vibrations and the photofragmentation branching ratios provides valuable information about the stepwise microsolvation of Im+ in a nonpolar hydrophobic environment, including the formation of structural isomers, the competition between various intermolecular binding motifs (H-bonding and pi-bonding) and their interaction energies, and the acidity of both the CH and NH protons. In line with the calculations, the IRPD spectra show that the most stable Im+-L dimers feature planar H-bound equilibrium structures with nearly linear H-bonds of L to the acidic NH group of Im+. Further solvation occurs at the aromatic ring of Im+ via the formation of intermolecular pi-bonds. Comparison with neutral Im-Ar demonstrates the drastic effect of ionization on the topology of the intermolecular potential, in particular in the preferred aromatic substrate-nonpolar recognition motif, which changes from pi-bonding to H-bonding. .
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Affiliation(s)
- Horia-Sorin Andrei
- Institut für Physikalische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
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Solcà N, Dopfer O. Microsolvation of the indole cation (In+) in a nonpolar environment: IR spectra of In+–Lncomplexes (L = Ar and N2, n ≤ 8). Phys Chem Chem Phys 2004. [DOI: 10.1039/b313110f] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Andrei HS, Solcà N, Dopfer O. Ionization-induced switch in aromatic molecule–nonpolar ligand recognition: Acidity of 1-naphthol+(1-Np+) rotamers probed by IR spectra of 1-Np+–Lncomplexes (L = Ar/N2, n ≤ 5). Phys Chem Chem Phys 2004. [DOI: 10.1039/b403970j] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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