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Knochenmuss R, Sinha RK, Leutwyler S. Face, Notch, or Edge? Intermolecular dissociation energies of 1-naphthol complexes with linear molecules. J Chem Phys 2019; 150:234303. [DOI: 10.1063/1.5100139] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Richard Knochenmuss
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Rajeev K. Sinha
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Samuel Leutwyler
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
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2
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Knochenmuss R, Maity S, Balmer F, Müller C, Leutwyler S. Intermolecular dissociation energies of 1-naphthol·n-alkane complexes. J Chem Phys 2018; 149:034306. [DOI: 10.1063/1.5034110] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Richard Knochenmuss
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Surajit Maity
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Franziska Balmer
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Charlotte Müller
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Samuel Leutwyler
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
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3
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Knochenmuss R, Sinha RK, Leutwyler S. Intermolecular dissociation energies of dispersively bound complexes of aromatics with noble gases and nitrogen. J Chem Phys 2018; 148:134302. [DOI: 10.1063/1.5019432] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Richard Knochenmuss
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Rajeev K. Sinha
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Samuel Leutwyler
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
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4
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Novak J, Prlj A, Basarić N, Corminboeuf C, Došlić N. Photochemistry of 1- and 2-Naphthols and Their Water Clusters: The Role of1ππ*(La) Mediated Hydrogen Transfer to Carbon Atoms. Chemistry 2017; 23:8244-8251. [DOI: 10.1002/chem.201700691] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Jurica Novak
- Department of Physical Chemistry; Ruđer Bošković Institute; Bijenička cesta 54 10000 Zagreb Croatia
| | - Antonio Prlj
- Institut des Sciences et Ingénierie Chimiques; Ecole Polytechnique Fédérale de Lausanne; 1015 Lausanne Switzerland
| | - Nikola Basarić
- Department of Organic Chemistry and Biochemistry; Ruđer Bošković Institute; Bijenička cesta 54 10000 Zagreb Croatia
| | - Clémence Corminboeuf
- Institut des Sciences et Ingénierie Chimiques; Ecole Polytechnique Fédérale de Lausanne; 1015 Lausanne Switzerland
| | - Nađa Došlić
- Department of Physical Chemistry; Ruđer Bošković Institute; Bijenička cesta 54 10000 Zagreb Croatia
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5
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Maity S, Ottiger P, Balmer FA, Knochenmuss R, Leutwyler S. Intermolecular dissociation energies of dispersively bound 1-naphthol⋅cycloalkane complexes. J Chem Phys 2016; 145:244314. [DOI: 10.1063/1.4973013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Surajit Maity
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern, Switzerland
| | - Philipp Ottiger
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern, Switzerland
| | - Franziska A. Balmer
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern, Switzerland
| | - Richard Knochenmuss
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern, Switzerland
| | - Samuel Leutwyler
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern, Switzerland
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6
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Constantinidis P, Lang M, Herterich J, Fischer I, Auerswald J, Krueger A. Electronic Spectroscopy of 1-(Phenylethynyl)naphthalene. J Phys Chem A 2014; 118:2915-21. [DOI: 10.1021/jp412482p] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Philipp Constantinidis
- 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
| | - Jörg Herterich
- 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
| | - Johannes Auerswald
- Institute
of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Anke Krueger
- Institute
of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
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7
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Margraf M, Noller B, Schröter C, Schultz T, Fischer I. Time- and frequency-resolved photoionization of the C A22 state of the benzyl radical, C7H7. J Chem Phys 2010; 133:074304. [DOI: 10.1063/1.3469787] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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8
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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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9
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Schneider M, Hain T, Fischer I. Resonance-Enhanced Multiphoton Ionisation of Purine. Chemphyschem 2009; 10:634-6. [DOI: 10.1002/cphc.200800728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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LeGreve TA, James III WH, Zwier TS. Solvent Effects on the Conformational Preferences of Serotonin: Serotonin−(H2O)n, n = 1,2. J Phys Chem A 2008; 113:399-410. [PMID: 19099446 DOI: 10.1021/jp807031y] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Tracy A. LeGreve
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084
| | | | - Timothy S. Zwier
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084
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11
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Noller B, Fischer I. Photodissociation dynamics of the 2-propyl radical, C3H7. J Chem Phys 2007; 126:144302. [PMID: 17444707 DOI: 10.1063/1.2715917] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The photodissociation of 2-propyl leading to propene+H was investigated with nanosecond time resolution. A supersonic beam of isolated 2-propyl radicals was produced by pyrolysis of 2-bromopopane. The kinetic energy release of the H-atom photofragment was monitored as a function of excitation wavelength by photofragment Doppler spectroscopy via the Lyman-alpha transition. The loss of hydrogen atoms after excitation proceeds in alpha position to the radical center with a rate constant of 5.8x10(7) s-1 at 254 nm. Approximately 20% of the excess energy is deposited as translation in the H-atom photofragment. In contrast 1-propyl does not lose H atoms to a significant extent. The experimental results are compared to simple Rice-Ramsperger-Kassel-Marcus calculations. The possible reaction pathways are examined in hybrid density functional theory calculations.
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Affiliation(s)
- Bastian Noller
- Institute of Physical Chemistry, University of Würzburg, Am Hubland D-97074 Würzburg, Germany
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12
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Schneider M, Schon C, Fischer I, Rubio-Lago L, Kitsopoulos T. Photodissociation of uracil. Phys Chem Chem Phys 2007; 9:6021-6. [DOI: 10.1039/b706712g] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Schneider M, Maksimenka R, Buback FJ, Kitsopoulos T, Lago LR, Fischer I. Photodissociation of thymine. Phys Chem Chem Phys 2006; 8:3017-21. [PMID: 16880915 DOI: 10.1039/b518443f] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We discuss the photochemistry and photodissociation dynamics of thymine as revealed by two-colour photofragment Doppler spectroscopy and by one-colour slice imaging. Thymine is optically excited into the pipi* state, known to deactivate quickly. The H atom photofragment spectra are dominated by two-photon excitation processes with subsequent statistical dissociation. This can be explained by absorption of a second photon from a long-lived dark state to a highly excited state that quickly deactivates to the electronic ground state. No evidence was found for an important role of the pisigma* excited state identified in adenine and many other heterocyclic molecules.
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Affiliation(s)
- Michael Schneider
- Institute of Physical Chemistry, University of Würzburg, Am Hubland, D-97074, Würzburg
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14
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Xantheas SS, Roth W, Fischer I. Competition between van der Waals and hydrogen bonding interactions: structure of the trans-1-naphthol/N(2) cluster. J Phys Chem A 2005; 109:9584-9. [PMID: 16866411 DOI: 10.1021/jp053708e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The excitation energy in the multiphoton ionization spectrum of the trans-1-naphthol/N(2) cluster shows only a small red shift with respect to isolated naphthol, indicating a van der Waals pi-bound structure rather than a hydrogen-bonded one. To confirm this interpretation, high-level electronic structure calculations were performed for several pi- and hydrogen-bonded isomers of this cluster. The calculations were carried out at the second order Møller-Plesset (MP2) level of perturbation theory with the family of correlation consistent basis sets up to quintuple-zeta quality including corrections for the basis set superposition error and extrapolation to the MP2 complete basis set (CBS) limit. We report the optimal geometries, vibrational frequencies, and binding energies (D(e)), also corrected for harmonic zero-point energies (D(0)), for three energetically low-lying isomers. In all calculations the lowest energy structure was found to be an isomer with the N(2) molecule bound to the pi-system of the naphthol ring carrying the OH group. In the CBS limit its dissociation energy was computed to be D(0) = 2.67 kcal/mol (934 cm(-1)) as compared to D(0) = 1.28 kcal/mol (448 cm(-1)) for the H-bound structure. The electronic structure calculations therefore confirm the assignment of the experimental electronic spectrum corresponding to a van der Waals pi-bound structure. The energetic stabilization of the pi-bound isomer with respect to the hydrogen-bonded one is rather unexpected when compared with previous findings in related systems, in particular phenol/N(2).
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Affiliation(s)
- Sotiris S Xantheas
- Pacific Northwest National Laboratory, 906 Battelle Boulevard, P. O. Box 999, MS K1-83, Richland, Washington 99352, USA.
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15
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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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16
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Crews B, Abo-Riziq A, Grace L, Callahan M, Kabelác M, Hobza P, de Vries MS. IR-UV double resonance spectroscopy of guanine–H2O clusters. Phys Chem Chem Phys 2005; 7:3015-20. [PMID: 16186904 DOI: 10.1039/b506107e] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present the IR-UV double resonance spectrum of guanine monohydrate in the region 3100 cm(-1) to 3800 cm(-1) along with the energies and frequencies of these structures calculated at the non-empirical correlated ab initio RI-MP2/cc-pVDZ level. We assign the structures of guanine-water clusters by comparing the experimental spectra with the ab initio calculations and with the IR spectra of the bare guanine monomer. We find two clusters with guanine in the enol-amino tautomeric form and one structure with guanine in the keto-amino form.
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Affiliation(s)
- Bridgit Crews
- Department of Chemistry and Biochemistry, University of California Santa Barbara, CA 93106-9510, USA
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