1
|
D'mello VC, Wategaonkar S. Characterization and Photofragmentation Studies of the Benzimidazole Homodimer: Evidence for Excited-State Charge-Coupled Proton Transfer. J Phys Chem A 2021; 125:4967-4975. [PMID: 34101459 DOI: 10.1021/acs.jpca.1c01591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The spectroscopic characterization of the benzimidazole (BIM) homodimer was carried out in a molecular beam in the ground state as well as in the cationic state using the R2PI and RIDIR methods. Primarily, interest in the dimer was due to the observation of a proton-transferred BIM fragment at energies well below its thermodynamic threshold (i.e., barely above the ionization energy of the dimer where fragmentation was not expected). The detailed photofragmentation studies of the homodimer combined with spectroscopic observations and quantum chemical computations of the excited states established that the proton transfer from one subunit to the other occurs via conical intersections connecting the locally excited state, the charge-transfer state, and the ground state. In this study, we have also determined the N-H···N hydrogen bond dissociation energy in the ground state and in the cationic state to be 10.36 ± 0.14 and 27.55 ± 0.20 kcal mol-1, respectively. Incidentally, this happens to be the first such report on the dissociation energy of the N-H···N hydrogen bond.
Collapse
Affiliation(s)
- Viola Caroline D'mello
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| | - Sanjay Wategaonkar
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
| |
Collapse
|
2
|
Helle N, Hintelmann I, Grotemeyer J. Detailed analysis of the vibronic structure of phenetole in its first excited state and ionic ground state. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2019; 25:142-156. [PMID: 30773918 DOI: 10.1177/1469066718822643] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The vibronic structure of the first electronically excited state S1 and ionic ground state D0 of phenetole has been investigated by means of resonance enhanced multi photon ionization (REMPI) and mass analyzed threshold ionization (MATI) spectroscopy. The vibronic levels were assigned with the aid of quantum chemical calculations at the (TD)DFT level of theory and a multidimensional Franck-Condon approach. The S1 excitation energy of phenetole has been determined to be 36370 ± 4 cm-1 (4.5093 ± 0.0005 eV). The adiabatic ionization energy was determined to be 65665 ± 7 cm-1 (8.1415 ± 0.0008 eV). The vibronic structure has been analyzed whereby the in-plane bending vibration νbend shows high activity in the first excited state but is more pronounced in the ionic ground state. Moreover, a strong Duschinsky rotation effect can be observed for several D0←S1 transitions that causes violations of the Δv = 0 propensity rule.
Collapse
Affiliation(s)
- Niklas Helle
- Institute of Physical Chemistry, Christian-Albrechts-University Kiel Max-Eyth-Str. 1, Kiel, Germany
| | - Immo Hintelmann
- Institute of Physical Chemistry, Christian-Albrechts-University Kiel Max-Eyth-Str. 1, Kiel, Germany
| | - Jürgen Grotemeyer
- Institute of Physical Chemistry, Christian-Albrechts-University Kiel Max-Eyth-Str. 1, Kiel, Germany
| |
Collapse
|
3
|
Dopfer O, Fujii M. Probing Solvation Dynamics around Aromatic and Biological Molecules at the Single-Molecular Level. Chem Rev 2016; 116:5432-63. [DOI: 10.1021/acs.chemrev.5b00610] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Otto Dopfer
- Institut
für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany
| | - Masaaki Fujii
- Laboratory
for Chemistry and Life Science, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| |
Collapse
|
4
|
Biswal HS, Bhattacharyya S, Bhattacherjee A, Wategaonkar S. Nature and strength of sulfur-centred hydrogen bonds: laser spectroscopic investigations in the gas phase and quantum-chemical calculations. INT REV PHYS CHEM 2015. [DOI: 10.1080/0144235x.2015.1022946] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
5
|
Zehnacker A. Optical spectroscopy coupled with mass spectrometry methods. Phys Chem Chem Phys 2015; 17:25672-5. [DOI: 10.1039/c5cp90155c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This themed issue reports on recent progress in the fast developing field of spectroscopy of ions by means of mass spectrometry coupled with optical spectroscopy. It focuses on both the experimental and theoretical aspects of this topic.
Collapse
Affiliation(s)
- Anne Zehnacker
- CNRS
- Institut des Sciences Moléculaires d’Orsay (ISMO/UMR8214) and Univ. Paris Sud
- Orsay
- France
| |
Collapse
|
6
|
Bhattacharyya S, Wategaonkar S. ZEKE Photoelectron Spectroscopy of p-Fluorophenol···H2S/H2O Complexes and Dissociation Energy Measurement Using the Birge–Sponer Extrapolation Method. J Phys Chem A 2014; 118:9386-96. [DOI: 10.1021/jp505393p] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Surjendu Bhattacharyya
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India
| | - Sanjay Wategaonkar
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India
| |
Collapse
|
7
|
Böning M, Stuhlmann B, Engler G, Kleinermanns K. Isomer-Selective Vibrational Spectroscopy of Jet-Cooled Phenol–Acetylene Aggregates. J Phys Chem A 2013; 117:3214-20. [DOI: 10.1021/jp3125796] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Markus Böning
- Institute for Physical
Chemistry, Heinrich-Heine University Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| | - Benjamin Stuhlmann
- Institute for Physical
Chemistry, Heinrich-Heine University Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| | - Gernot Engler
- Institute for Physical
Chemistry, Heinrich-Heine University Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| | - Karl Kleinermanns
- Institute for Physical
Chemistry, Heinrich-Heine University Düsseldorf, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| |
Collapse
|
8
|
Fujii M, Dopfer O. Ionisation-induced site switching dynamics in solvated aromatic clusters: phenol–(rare gas)nclusters as prototypical example. INT REV PHYS CHEM 2012. [DOI: 10.1080/0144235x.2012.656013] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
9
|
Pasquini M, Piani G, Mazzoni F, Pietraperzia G, Becucci M. Photoelectron imaging as a tool in photoionization studies. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2010.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
10
|
Pietraperzia G, Pasquini M, Mazzoni F, Piani G, Becucci M, Biczysko M, Michalski D, Bloino J, Barone V. Noncovalent Interactions in the Gas Phase: The Anisole–Phenol Complex. J Phys Chem A 2011; 115:9603-11. [DOI: 10.1021/jp200444a] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Giangaetano Pietraperzia
- LENS, Polo Scientifico e Tecnologico dell’Università di Firenze, Via Nello Carrara 1, 50019 Sesto Fiorentino (FI), Italy
- Dipartimento di Chimica, Polo Scientifico e Tecnologico dell’Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | - Massimiliano Pasquini
- LENS, Polo Scientifico e Tecnologico dell’Università di Firenze, Via Nello Carrara 1, 50019 Sesto Fiorentino (FI), Italy
- Dipartimento di Chimica, Polo Scientifico e Tecnologico dell’Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | - Federico Mazzoni
- LENS, Polo Scientifico e Tecnologico dell’Università di Firenze, Via Nello Carrara 1, 50019 Sesto Fiorentino (FI), Italy
- Dipartimento di Chimica, Polo Scientifico e Tecnologico dell’Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | - Giovanni Piani
- LENS, Polo Scientifico e Tecnologico dell’Università di Firenze, Via Nello Carrara 1, 50019 Sesto Fiorentino (FI), Italy
| | - Maurizio Becucci
- LENS, Polo Scientifico e Tecnologico dell’Università di Firenze, Via Nello Carrara 1, 50019 Sesto Fiorentino (FI), Italy
- Dipartimento di Chimica, Polo Scientifico e Tecnologico dell’Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy
| | - Malgorzata Biczysko
- Scuola Normale Superiore di Pisa and INFN Sezione di Pisa, Piazza dei Cavalieri 7, 56126 Pisa, Italy
- Department of Chemistry “P. Corradini”, Università di Napoli “Federico II” and INSTM “M3-Village”, Complesso Universitario Monte Sant’Angelo, Via Cintia, 80126 Naples, Italy
| | - Daniel Michalski
- Department of Chemistry “P. Corradini”, Università di Napoli “Federico II” and INSTM “M3-Village”, Complesso Universitario Monte Sant’Angelo, Via Cintia, 80126 Naples, Italy
| | - Julien Bloino
- Scuola Normale Superiore di Pisa and INFN Sezione di Pisa, Piazza dei Cavalieri 7, 56126 Pisa, Italy
- Department of Chemistry “P. Corradini”, Università di Napoli “Federico II” and INSTM “M3-Village”, Complesso Universitario Monte Sant’Angelo, Via Cintia, 80126 Naples, Italy
| | - Vincenzo Barone
- Scuola Normale Superiore di Pisa and INFN Sezione di Pisa, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| |
Collapse
|
11
|
Kleinermanns K, Gerhards M, Schmitt M. Electronic spectroscopy of aromatic molecules in jet-cooled hydrogen bonded clusters - structure and fluxionality. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19971011202] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
12
|
Lagutschenkov A, Sinha RK, Maitre P, Dopfer O. Structure and Infrared Spectrum of the Ag+−Phenol Ionic Complex. J Phys Chem A 2010; 114:11053-9. [DOI: 10.1021/jp100853m] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anita Lagutschenkov
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany, and Laboratoire de Chimie Physique, Faculté des Sciences, Université Paris-Sud 11, UMR8000 CNRS, Bât. 350, 91405 Orsay Cedex, France
| | - Rajeev K. Sinha
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany, and Laboratoire de Chimie Physique, Faculté des Sciences, Université Paris-Sud 11, UMR8000 CNRS, Bât. 350, 91405 Orsay Cedex, France
| | - Philippe Maitre
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany, and Laboratoire de Chimie Physique, Faculté des Sciences, Université Paris-Sud 11, UMR8000 CNRS, Bât. 350, 91405 Orsay Cedex, France
| | - Otto Dopfer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Germany, and Laboratoire de Chimie Physique, Faculté des Sciences, Université Paris-Sud 11, UMR8000 CNRS, Bât. 350, 91405 Orsay Cedex, France
| |
Collapse
|
13
|
Schon C, Roth W, Fischer I, Pfister J, Kaiser C, Fink RF, Engels B. Paracyclophanes as model compounds for strongly interacting π-systems. Part 1. Pseudo-ortho-dihydroxy[2.2]paracyclophane. Phys Chem Chem Phys 2010; 12:9339-46. [DOI: 10.1039/b925634b] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
14
|
Pillsbury NR, Müller CW, Meerts WL, Plusquellic DF, Zwier TS. Conformational Effects on Excitonic Interactions in a Prototypical H-Bonded Bichromophore: Bis(2-hydroxyphenyl)methane. J Phys Chem A 2009; 113:5000-12. [DOI: 10.1021/jp8098686] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Nathan R. Pillsbury
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, Molecular and Biophysics Group, Institute for Molecules and Materials, Radboud University Nijmegen, P.O. Box 9010, NL-6500 GL Nijmegen, The Netherlands, and Biophysics Group, Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8443
| | - Christian W. Müller
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, Molecular and Biophysics Group, Institute for Molecules and Materials, Radboud University Nijmegen, P.O. Box 9010, NL-6500 GL Nijmegen, The Netherlands, and Biophysics Group, Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8443
| | - W. Leo Meerts
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, Molecular and Biophysics Group, Institute for Molecules and Materials, Radboud University Nijmegen, P.O. Box 9010, NL-6500 GL Nijmegen, The Netherlands, and Biophysics Group, Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8443
| | - David F. Plusquellic
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, Molecular and Biophysics Group, Institute for Molecules and Materials, Radboud University Nijmegen, P.O. Box 9010, NL-6500 GL Nijmegen, The Netherlands, and Biophysics Group, Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8443
| | - Timothy S. Zwier
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, Molecular and Biophysics Group, Institute for Molecules and Materials, Radboud University Nijmegen, P.O. Box 9010, NL-6500 GL Nijmegen, The Netherlands, and Biophysics Group, Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8443
| |
Collapse
|
15
|
Brause R, Santa M, Schmitt M, Kleinermanns K. Determination of the Geometry Change of the Phenol Dimer upon Electronic Excitation. Chemphyschem 2007; 8:1394-401. [PMID: 17510990 DOI: 10.1002/cphc.200700127] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The change of the phenol dimer (PH2) structure upon electronic excitation is determined by a Franck-Condon analysis of the intensities in the fluorescence emission spectra obtained via excitation of seven different vibronic bands. A total of 547 emission band intensities are fitted, together with the changes of rotational constants upon electronic excitation of fi ve isotopomers. These rotational constants are taken from previously published [Schmitt et al. ChemPhysChem 2006, 7, 1241-1249] high-resolution LIF measurements. The geometry change upon electronic excitation of the pipi* state of the donor moiety can be described by a strong shortening of the hydrogen bond, a shortening of the CO bond in the donor moiety, an overall symmetric expansion of the donor phenol ring, and a nearly unchanged acceptor moiety. The resulting geometry changes are interpreted on the basis of ab initio calculations.
Collapse
Affiliation(s)
- Robert Brause
- Heinrich-Heine-Universität, Institut für Physikalische Chemie I, 40225 Düsseldorf, Germany
| | | | | | | |
Collapse
|
16
|
|
17
|
Schmitt M, Böhm M, Ratzer C, Krügler D, Kleinermanns K, Kalkman I, Berden G, Meerts WL. Determining the Intermolecular Structure in the S0 and S1 States of the Phenol Dimer by Rotationally Resolved Electronic Spectroscopy. Chemphyschem 2006; 7:1241-9. [PMID: 16680792 DOI: 10.1002/cphc.200500670] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The rotationally resolved UV spectra of the electronic origins of five isotopomers of the phenol dimer have been measured. The complex spectra are analyzed using a fitting strategy based on a genetic algorithm. The intermolecular geometry parameters have been determined from the inertial parameters for both electronic states and compared to the results of ab initio calculations. In the electronic ground state, a larger hydrogen-bond length than in the ab initio calculations is found together with a smaller tilt angle of the aromatic rings, which shows a more pronounced dispersion interaction. In the electronically excited state, the hydrogen-bond length decreases, as has been found for other hydrogen-bonded clusters of phenol, and the two aromatic rings are tilted less toward each other.
Collapse
Affiliation(s)
- Michael Schmitt
- Institut für Physikalische Chemie, Universitätsstrasse 26.43.02, 40225 Düsseldorf, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Resonance enhanced multiphoton ionization and time-of-flight mass spectra of jet-cooled 3-chlorophenol dimer. J Mol Struct 2005. [DOI: 10.1016/j.molstruc.2004.12.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
19
|
Le Barbu-Debus K, Broquier M, Lahmani F, Zehnacker-Rentien * A. Localization of electronic and vibrational energy in the jet-cooledm-cyanophenol/o-cyanophenol dimer: laser induced fluorescence and fluorescence-dip IR spectra. Mol Phys 2005. [DOI: 10.1080/00268970500077608] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
20
|
Longarte A, Redondo C, Fernández JA, Castaño F. IR/UV and UV/UV double-resonance study of guaiacol and eugenol dimers. J Chem Phys 2005; 122:164304. [PMID: 15945681 DOI: 10.1063/1.1881232] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Guaiacol (2-methoxyphenol) and eugenol (4-allyl-2-methoxyphenol) molecules are biologically active phenol derivatives with an intramolecular -OH...OCH3 hydrogen bond (H bond). Pulsed supersonic expansions of mixtures of either of the two molecules with He yield weakly bound homodimers as well as other higher-order complexes. A number of complementary and powerful laser spectroscopic techniques, including UV-UV and IR-UV double resonances, have been employed to interrogate the species formed in the expansion in order to get information on their structures and spectroscopic properties. The interpretation of the spectra of eugenol dimer is complex and required a previous investigation on a similar but simpler molecule both to gain insight into the possible structures and support the conclusions. Guaiacol (2-methoxyphenol) has been used for that purpose. The combination of the broad laser study combined with ab initio calculations at the Becke 3 Lee-Yang-Parr/6-31+Gd level has provided the isomer structures, the potential-energy wells, and shed light on the inter- and intramolecular interactions involved. Guaiacol homodimer has been shown to have a single isomer whereas eugenol dimer has at least two. The comparison between the computed geometries of the dimers, their respective energies, and the vibrational normal modes permits the identification of the spectra.
Collapse
Affiliation(s)
- Asier Longarte
- Departamento de Química-Física, Facultad de Ciencia y Tecnologia, Universidad del País Vasco, Apartado 644, 48080 Bilbao, Spain
| | | | | | | |
Collapse
|
21
|
Das TN. Oxidation of Phenol in Aqueous Acid: Characterization and Reactions of Radical Cations vis-à-vis the Phenoxyl Radical. J Phys Chem A 2005; 109:3344-51. [PMID: 16833669 DOI: 10.1021/jp050015p] [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: 01/14/2023]
Abstract
Aqueous sulfuric acid containing up to approximately 14 M acid (H0 > or = -7.0) was used as solvent in pulse radiolytic redox studies to characterize cationic transients of phenol (C6H5OH) and map their reactions. The primary radical yields were first measured to correlate the variation in various radical concentrations as a function of increasing acid fraction in the solvent. Compared to their respective values at pH 2, the G(Ox*) increased with almost a linear slope of approximately 0.024 micromol J(-1) for H0(-1) (or pH(-1)) up to H0 -6.0 (Ox* = *OH + SO4*-), whereas G(H*) increased with a slope of approximately 0.033 micromol J(-1) for H0(-1) (or pH(-1)) up to H0 -5.0. In the presence of > 10 M acid (H0 < -5.0), phenol was oxidized to its radical cation, C6H5OH*+, which further reacted with phenol and generated the secondary, dimeric radical cation, (C6H5OH)2*+, following an equilibrium reaction C6H5OH*+ + C6H5OH <==> (C6H5OH)2*+, with K(eq) = 315 +/- 15 M(-1). The two cationic radicals were characterized from their individual UV-vis absorption spectra and acidity. The C6H5OH*+ absorption peaks are centered at 276 and 419 nm, and it was found to be more acidic (pKa = -2.75 +/- 0.05) than (C6H5OH)2*+ (pKa = -1.98 +/- 0.02), having its major peak at 410 nm. On the other hand, in the presence of < 6.5 M acid the C6H5O* reactions followed the radical dimerization route, independent of the parent phenol concentration.
Collapse
Affiliation(s)
- Tomi Nath Das
- Radiation Chemistry & Chemical Dynamics Division, B.A.R.C., Trombay, Mumbai 400 085, India.
| |
Collapse
|
22
|
Biswas N, Chakraborty S, Wategaonkar S. Gas Phase Spectroscopic Studies of Hydroquinone Dimer. J Phys Chem A 2004. [DOI: 10.1021/jp0470501] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- N. Biswas
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - S. Chakraborty
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| | - S. Wategaonkar
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
| |
Collapse
|
23
|
Honkawa Y, Inokuchi Y, Ohashi K, Nishi N, Sekiya H. Infrared spectra and structures of aniline+–furan and aniline+–phenol. Preference between π-type and σ-type hydrogen-bonded structures. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00985-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
24
|
High-resolution pump–probe rotational coherence spectroscopy – rotational constants and structure of ground and electronically excited states of large molecular systems. Chem Phys 2002. [DOI: 10.1016/s0301-0104(02)00572-4] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
25
|
Naresh Patwari G, Ebata T, Mikami N. Dihydrogen bonded phenol–borane-dimethylamine complex: An experimental and theoretical study. J Chem Phys 2002. [DOI: 10.1063/1.1459415] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
26
|
Protonation of aromatic molecules: competition between ring and oxygen protonation of phenol (Ph) revealed by IR spectra of PhH+–Arn. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00556-5] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
27
|
Weichert A, Riehn C, Brutschy B. High-Resolution Rotational Coherence Spectroscopy of the Phenol Dimer. J Phys Chem A 2001. [DOI: 10.1021/jp003816v] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreas Weichert
- Johann Wolfgang Goethe-Universität Frankfurt/M., Institut für Physikalische und Theoretische Chemie, Marie-Curie-Strasse 11, D-60439 Frankfurt/M., Germany
| | - Christoph Riehn
- Johann Wolfgang Goethe-Universität Frankfurt/M., Institut für Physikalische und Theoretische Chemie, Marie-Curie-Strasse 11, D-60439 Frankfurt/M., Germany
| | - Bernhard Brutschy
- Johann Wolfgang Goethe-Universität Frankfurt/M., Institut für Physikalische und Theoretische Chemie, Marie-Curie-Strasse 11, D-60439 Frankfurt/M., Germany
| |
Collapse
|
28
|
Naresh Patwari G, Ebata T, Mikami N. Evidence of a dihydrogen bond in gas phase: Phenol–borane-dimethylamine complex. J Chem Phys 2000. [DOI: 10.1063/1.1330234] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
29
|
Geppert WD, Ullrich S, Dessent CEH, Müller-Dethlefs K. Observation of Rotational Isomers II: A ZEKE and Hole-Burning Spectroscopy Study of Hydrogen-Bonded 3-Methoxyphenol·Water Clusters. J Phys Chem A 2000. [DOI: 10.1021/jp002448s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wolf D. Geppert
- Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Susanne Ullrich
- Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | | | | |
Collapse
|
30
|
Dessent CE, Müller-Dethlefs K. Hydrogen-Bonding and van der Waals Complexes Studied by ZEKE and REMPI Spectroscopy. Chem Rev 2000; 100:3999-4022. [PMID: 11749337 DOI: 10.1021/cr990060r] [Citation(s) in RCA: 181] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C E Dessent
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | | |
Collapse
|
31
|
Geppert WD, Dessent CEH, Ullrich S, Müller-Dethlefs K. Observation of Hydrogen-Bonded Rotational Isomers of the Resorcinol·Water Complex. J Phys Chem A 1999. [DOI: 10.1021/jp991584y] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Wolf D. Geppert
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | | | - Susanne Ullrich
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, U.K
| | | |
Collapse
|
32
|
Inauen A, Hewel J, Leutwyler S. Intermolecular bonding and vibrations of phenol⋅oxirane. J Chem Phys 1999. [DOI: 10.1063/1.478021] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
33
|
Ohashi K, Nishiguchi M, Inokuchi Y, Sekiya H, Nishi N. Photodissociation spectrum of cyanobenzene dimer cation. Absence of intermolecular resonance interaction. RESEARCH ON CHEMICAL INTERMEDIATES 1998. [DOI: 10.1163/156856798x00393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
34
|
Nonresonant ionization detected IR spectrum of jet-cooled phenol. Ionization mechanism and its application to overtone spectroscopy. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(97)01351-1] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
35
|
Fujii A, Iwasaki A, Yoshida K, Ebata T, Mikami N. Infrared Spectroscopy of (Phenol)n+ (n = 2−4) and (Phenol−Benzene)+ Cluster Ions. J Phys Chem A 1997. [DOI: 10.1021/jp961910z] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Asuka Fujii
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Atsushi Iwasaki
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Kazuhiro Yoshida
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Takayuki Ebata
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Naohiko Mikami
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| |
Collapse
|
36
|
Sugawara KI, Miyawaki J, Nakanaga T, Takeo H, Lembach G, Djafari S, Barth HD, Brutschy B. Infrared Depletion Spectroscopy of the Aniline Dimer. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp961901q] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
37
|
Photodissociation spectroscopy of phenol dimer ion. Lack of resonance interaction between the aromatic rings. Chem Phys Lett 1996. [DOI: 10.1016/0009-2614(96)00522-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
38
|
Zero kinetic energy photoelectron (ZEKE) spectroscopy of the heterotrimer phenol-water-argon: Interaction between a hydrogen bond and a van der Waals bond. Chem Phys 1996. [DOI: 10.1016/0301-0104(96)00010-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
39
|
|
40
|
Sawamura T, Fujii A, Sato S, Ebata T, Mikami N. Characterization of the Hydrogen-Bonded Cluster Ions [Phenol−(H2O)n]+ (n = 1−4), (Phenol)2+, and (Phenol−Methanol)+ As Studied by Trapped Ion Infrared Multiphoton Dissociation Spectroscopy of Their OH Stretching Vibrations. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp952622q] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takahiro Sawamura
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Asuka Fujii
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Shin Sato
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Takayuki Ebata
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| | - Naohiko Mikami
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan
| |
Collapse
|
41
|
Yeh JH, Shen TL, Nocera DG, Leroi GE, Suzuka I, Ozawa H, Namuta Y. Resonance Two-Photon Ionization Spectroscopy of the Aniline Dimer. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp952415q] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
42
|
Schmitt M, Henrichs U, Müller H, Kleinermanns K. Intermolecular vibrations of the phenol dimer revealed by spectral hole burning and dispersed fluorescence spectroscopy. J Chem Phys 1995. [DOI: 10.1063/1.470686] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
43
|
Schmitt M, Müller H, Henrichs U, Gerhards M, Perl W, Deusen C, Kleinermanns K. Structure and vibrations of phenol⋅CH3OH (CD3OD) in the electronic ground and excited state, revealed by spectral hole burning and dispersed fluorescence spectroscopy. J Chem Phys 1995. [DOI: 10.1063/1.470093] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
44
|
Schiefke A, Deusen C, Jacoby C, Gerhards M, Schmitt M, Kleinermanns K, Hering P. Structure and vibrations of the phenol‐ammonia cluster. J Chem Phys 1995. [DOI: 10.1063/1.468869] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
45
|
Brovchenko IV. Structural transformations of impurity centers in naphthalene crystals. J Chem Phys 1995. [DOI: 10.1063/1.469328] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
46
|
Mikami N. Spectroscopic Study of Intracluster Proton Transfer in Small Size Hydrogen-Bonding Clusters of Phenol. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1995. [DOI: 10.1246/bcsj.68.683] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
47
|
Goode J, Cockett M, Lawley K, Donovan R. Zero kinetic energy (ZEKE) photoelectron spectroscopy of the rydberg excited iodine-argon van der waals complex. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(94)01254-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
48
|
Dopfer O, Müller‐Dethlefs K. S1 excitation and zero kinetic energy spectra of partly deuterated 1:1 phenol–water complexes. J Chem Phys 1994. [DOI: 10.1063/1.468111] [Citation(s) in RCA: 87] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
49
|
Dopfer O, Reiser G, Müller‐Dethlefs K, Schlag EW, Colson SD. Zero‐kinetic‐energy photoelectron spectroscopy of the hydrogen‐bonded phenol‐water complex. J Chem Phys 1994. [DOI: 10.1063/1.467752] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
50
|
Cockett MCR, Kimura K. A study of anthracene–Arn (n=0–5) in the ground cationic state by laser threshold photoelectron spectroscopy: Selective ionization of complex isomers formed in the free jet expansion. J Chem Phys 1994. [DOI: 10.1063/1.466386] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|