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Kınaytürk NK, Kalaycı T, Tunalı B, Altuğ DT. A spectroscopic approach to compare the quantum chemical calculations and experimental characteristics of some organic molecules; Benzene, Toluene, P-Xylene, P-Toluidine. Chem Phys 2023. [DOI: 10.1016/j.chemphys.2023.111905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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2
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Lee S, Ree J. Effects of the Substituents on the Energy Flow of Toluene Derivatives in Collisions with N
2
and O
2. B KOREAN CHEM SOC 2019. [DOI: 10.1002/bkcs.11841] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Su‐jin Lee
- Department of Chemistry EducationChonnam National University Gwangju 61186 South Korea
| | - Jongbaik Ree
- Department of Chemistry EducationChonnam National University Gwangju 61186 South Korea
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3
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Classical trajectory studies of collisional energy transfer. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/b978-0-444-64207-3.00003-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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4
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Pisareva AV, Shilov GV, Karelin AI, Pisarev RV, Shilova IA, Dobrovolsky YA, Aldoshin SM. Synthesis, structure and proton conductivity of 2,4,5-trimethylbenzenesulfonic acid dihydrate. NEW J CHEM 2018. [DOI: 10.1039/c7nj05068b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2,4,5-Trimethylbenzenesulfonic acid dihydrate is a good proton conductor and has potential as a polymer electrolyte for different electrochemical devices.
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Affiliation(s)
- A. V. Pisareva
- Institute of Problems of Chemical Physics Russian Academy of Sciences
- Russian Federation
| | - G. V. Shilov
- Institute of Problems of Chemical Physics Russian Academy of Sciences
- Russian Federation
| | - A. I. Karelin
- Institute of Problems of Chemical Physics Russian Academy of Sciences
- Russian Federation
| | - R. V. Pisarev
- Institute of Problems of Chemical Physics Russian Academy of Sciences
- Russian Federation
| | - I. A. Shilova
- Institute of Problems of Chemical Physics Russian Academy of Sciences
- Russian Federation
| | - Yu A. Dobrovolsky
- Institute of Problems of Chemical Physics Russian Academy of Sciences
- Russian Federation
| | - S. M. Aldoshin
- Institute of Problems of Chemical Physics Russian Academy of Sciences
- Russian Federation
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5
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Lindenmaier R, Scharko NK, Tonkyn RG, Nguyen KT, Williams SD, Johnson TJ. Improved assignments of the vibrational fundamental modes of ortho-, meta-, and para-xylene using gas- and liquid-phase infrared and Raman spectra combined with ab initio calculations: Quantitative gas-phase infrared spectra for detection. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.07.053] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Gardner AM, Green AM, Tamé-Reyes VM, Wilton VHK, Wright TG. Vibrations of the low energy states of toluene (X̃ (1)A1 and à (1)B2) and the toluene cation (X̃ (2)B1). J Chem Phys 2013; 138:134303. [PMID: 23574223 DOI: 10.1063/1.4796204] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We commence by presenting an overview of the assignment of the vibrational frequencies of the toluene molecule in its ground (S0) state. The assignment given is in terms of a recently proposed nomenclature, which allows the ring-localized vibrations to be compared straightforwardly across different monosubstituted benzenes. The frequencies and assignments are based not only on a range of previous work, but also on calculated wavenumbers for both the fully hydrogenated (toluene-h8) and the deuterated-methyl group isotopologue (α3-toluene-d3), obtained from density functional theory (DFT), including artificial-isotope shifts. For the S1 state, one-colour resonance-enhanced multiphoton ionization (REMPI) spectroscopy was employed, with the vibrational assignments also being based on previous work and time-dependent density functional theory (TDDFT) calculated values; but also making use of the activity observed in two-colour zero kinetic energy (ZEKE) spectroscopy. The ZEKE experiments were carried out employing a (1 + 1(')) ionization scheme, using various vibrational levels of the S1 state with an energy <630 cm(-1) as intermediates; as such we only discuss in detail the assignment of the REMPI spectra at wavenumbers <700 cm(-1), referring to the assignment of the ZEKE spectra concurrently. Comparison of the ZEKE spectra for the two toluene isotopologues, as well as with previously reported dispersed-fluorescence spectra, and with the results of DFT calculations, provide insight both into the assignment of the vibrations in the S1 and D0(+) states, as well as the couplings between these vibrations. In particular, insight into the nature of a complicated Fermi resonance feature at ∼460 cm(-1) in the S1 state is obtained, and Fermi resonances in the cation are identified. Finally, we compare activity observed in both REMPI and ZEKE spectroscopy for both toluene isotopologues with that for fluorobenzene and chlorobenzene.
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Affiliation(s)
- Adrian M Gardner
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
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7
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Byler DM, Patel Y, Arbuckle-Keil GA. An IR study of poly-1,4-phenylenevinylene (PPV), the 2,5-dimethoxy derivative [(MeO)2-PPV], and their corresponding xanthate precursor polymers and monomers. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 79:118-126. [PMID: 21420353 DOI: 10.1016/j.saa.2011.02.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 02/03/2011] [Accepted: 02/10/2011] [Indexed: 05/30/2023]
Abstract
A detailed comparison of the infrared (IR) spectra of poly-1,4-phenylenevinylene (PPV), its xanthate precursor polymer, and its bis-xanthate precursor monomer along with the corresponding 2,5-dimethoxy derivatives has provided a clearer basis for characterizing these species with regard to both structure and purity. All the xanthate precursor monomers and polymers exhibit characteristic intense absorptions typical of the xanthate group near 1220, 1110, and 1050 cm(-1). Upon complete conversion of the precursor polymer to the vinylene linked final product, the intense IR peaks of the xanthate group have disappeared and new bands resulting from the vinylene linkages are found. The latter include a moderately strong band near 965 cm(-1) due to the out-of-plane -CHCH- deformation of the trans-vinylene conjugated with and linking the phenyl rings into an optoelectronic polymer. Unfortunately, the corresponding C-H stretching vibration of this same group of atoms expected to appear near 3020 cm(-1) falls in the same region of the spectrum as the aromatic C-H stretches of the phenyl rings. Similarly, for the 2,5-dimethoxy polymer derivative, [(MeO)(2)-PPV], the C-H stretching vibration near 3055 cm(-1) contains contributions from both aromatic and vinylene C-H. Density functional theory (DFT) calculations on the monomers were instrumental in assigning the infrared spectra of these materials. This study provides a systemic means for verifying that the precursor monomer has been polymerized into the precursor polymer and that thermal conversion to the conjugated polymer is complete.
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Affiliation(s)
- D Michael Byler
- Department of Chemistry, Rutgers, The State University of New Jersey, Camden, NJ 08102, United States.
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8
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Isotope Labelling Studies of Some Aromatic N-Oxides - Part III. A Full Vibrational Assignment of the Infrared Spectra (4000-50 cm−1) of 2,2'-Bipyridine N,N'-Dioxide and its Fully Deuterated Analogue. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19911000308] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Böhlig H, Geidel E, Geiseler G. Modelle molekularer Kraftfelder und ihre Anwendung in der Schwingungsspektroskopie. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19860261103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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10
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Meinnel JJ, Boudjada A, Boucekkine A, Boudjada F, Moréac A, Parker SF. Vibrational Spectra of Triiodomesitylene: Combination of DFT Calculations and Experimental Studies. Effects of the Environment. J Phys Chem A 2008; 112:11124-41. [DOI: 10.1021/jp802621w] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jean J. Meinnel
- Laboratoire Sciences Chimiques de Rennes, UMR CNRS 6226 and Laboratoire Matière Condensée et Matériaux, UMR CNRS 6226, Université de Rennes 1, 35042 Rennes, France, Laboratoire de cristallographie, Faculté des Sciences, Université de Constantine, Constantine, Algerie, and Rutherford Appleton Laboratory, ISIS Facility, Didcot OX11 0QX, U.K
| | - Ali Boudjada
- Laboratoire Sciences Chimiques de Rennes, UMR CNRS 6226 and Laboratoire Matière Condensée et Matériaux, UMR CNRS 6226, Université de Rennes 1, 35042 Rennes, France, Laboratoire de cristallographie, Faculté des Sciences, Université de Constantine, Constantine, Algerie, and Rutherford Appleton Laboratory, ISIS Facility, Didcot OX11 0QX, U.K
| | - Abdou Boucekkine
- Laboratoire Sciences Chimiques de Rennes, UMR CNRS 6226 and Laboratoire Matière Condensée et Matériaux, UMR CNRS 6226, Université de Rennes 1, 35042 Rennes, France, Laboratoire de cristallographie, Faculté des Sciences, Université de Constantine, Constantine, Algerie, and Rutherford Appleton Laboratory, ISIS Facility, Didcot OX11 0QX, U.K
| | - Fahima Boudjada
- Laboratoire Sciences Chimiques de Rennes, UMR CNRS 6226 and Laboratoire Matière Condensée et Matériaux, UMR CNRS 6226, Université de Rennes 1, 35042 Rennes, France, Laboratoire de cristallographie, Faculté des Sciences, Université de Constantine, Constantine, Algerie, and Rutherford Appleton Laboratory, ISIS Facility, Didcot OX11 0QX, U.K
| | - Alain Moréac
- Laboratoire Sciences Chimiques de Rennes, UMR CNRS 6226 and Laboratoire Matière Condensée et Matériaux, UMR CNRS 6226, Université de Rennes 1, 35042 Rennes, France, Laboratoire de cristallographie, Faculté des Sciences, Université de Constantine, Constantine, Algerie, and Rutherford Appleton Laboratory, ISIS Facility, Didcot OX11 0QX, U.K
| | - Stewart F. Parker
- Laboratoire Sciences Chimiques de Rennes, UMR CNRS 6226 and Laboratoire Matière Condensée et Matériaux, UMR CNRS 6226, Université de Rennes 1, 35042 Rennes, France, Laboratoire de cristallographie, Faculté des Sciences, Université de Constantine, Constantine, Algerie, and Rutherford Appleton Laboratory, ISIS Facility, Didcot OX11 0QX, U.K
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11
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Liu Q, Du J, Havey DK, Li Z, Miller EM, Mullin AS. Alkylation effects on strong collisions of highly vibrationally excited alkylated pyridines with CO2. J Phys Chem A 2007; 111:4073-80. [PMID: 17388383 DOI: 10.1021/jp067743c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The role of alkylation on the energy partitioning in strong collisions with CO2 was investigated for highly vibrationally excited 2-ethylpyridine (2EP) and 2-propylpyridine (2PP) prepared with E(vib) approximately 38,570 and 38,870 cm(-1), respectively, using lambda = 266 nm light. Nascent energy gain in CO2 (00(0)0) rotation and translation was measured with high-resolution transient absorption spectroscopy at lambda approximately 4.3 microm and the results are compared to earlier relaxation studies of pyridine (E(vib) = 37,950 cm(-1)) and 2-methylpyridine (2MP, Evib = 38,330 cm(-1)). Overall, the alkylated donors impart less rotational and translational energy to CO2 than does pyridine. 2PP consistently imparts more translational energy in collisions than does 2EP and has larger energy transfer rates. Of the alkylated donors, 2MP and 2PP have larger probabilities for strong collisional energy transfer than does 2EP. Two competing processes are discussed: donors with longer alkyl chains have lower average energy per mode and fewer strong collisions but longer alkyl chains increase donor flexibility, leading to higher state densities that enhance energy loss via strong collisions. A comparison of state density effects based on Fermi's Golden Rule shows that 2PP has more strong collisions than predicted while 2EP has fewer. The role of torsional motion in the hot donors is considered. Comparison of effective impact parameters shows that the alkylated donors undergo strong collisions with CO2 via a less repulsive part of the intermolecular potential than does pyridine.
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Affiliation(s)
- Qingnan Liu
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
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12
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Kassaee MH, Keffer DJ, Steele WV. A comparison between entropies of aromatic compounds from quantum mechanical calculations and experiment. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.theochem.2006.09.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Bernshtein V, Oref I. Energy Transfer between Polyatomic Molecules. 3. Energy Transfer Quantities and Probability Density Functions in Self-Collisions of Benzene, Toluene, p-Xylene and Azulene. J Phys Chem A 2006; 110:8477-87. [PMID: 16821831 DOI: 10.1021/jp055612q] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This paper is the third and last in a series of papers that deal with collisional energy transfer, CET, between aromatic polyatomic molecules. Paper 1 of this series (J. Phys. Chem. B 2005, 109, 8310) reports on the mechanism and quantities of CET between an excited benzene and cold benzene and Ar bath. Paper 2 in the series (J. Phys. Chem., in press) discusses CET between excited toluene, p-xylene and azulene with cold benzene and Ar and CET between excited benzene colliding with cold toluene, p-xylene and azulene. The present work reports on CET in self-collisions of benzene, toluene, p-xylene and azulene. Two modes of excitation are considered, identical excitation energies and identical vibrational temperatures for all four molecules. It compares the present results with those of papers 1 and 2 and reports new findings on average vibrational, rotational, and translational energy, <DeltaE>, transferred in a single collision. CET takes place mainly via vibration to vibration energy transfer. The effect of internal rotors on CET is discussed and CET quantities are reported as a function of temperature and excitation energy. It is found that the temperature dependence of CET quantities is unexpected, resembling a parabolic function. The density of vibrational states is reported and its effect on CET is discussed. Energy transfer probability density functions, P(E,E'), for various collision pairs are reported and it is shown that the shape of the curves is convex at low temperatures and can be concave at high temperatures. There is a large supercollision tail at the down wing of P(E,E'). The mechanisms of CET are short, impulsive collisions and long-lived chattering collisions where energy is transferred in a sequence of short internal encounters during the lifetime of the collision complex. The collision complex lifetimes as a function of temperature are reported. It is shown that dynamical effects control CET. A comparison is made with experimental results and it is shown that good agreement is obtained.
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Affiliation(s)
- V Bernshtein
- Department of Chemistry, Technion-Israel institute of Technology, Haifa 32000, Israel
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14
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Hoops MD, Ault BS. Matrix isolation investigation of the photochemical reaction of methyl-substituted benzenes with CrCl2O2. J Phys Chem A 2006; 110:892-900. [PMID: 16419986 DOI: 10.1021/jp055057s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The matrix isolation technique, combined with infrared spectroscopy, has been used to characterize the products of the photochemical reactions of toluene, m-, o-, and p-xylene, mesitylene, and hexamethylbenzene with CrCl2O2. While initial twin jet deposition of the reagents led to no visible changes in the recorded spectra, strong product bands were noted following irradiation with light of lambda > 300 nm. The irradiation was shown to lead to oxygen atom transfer, forming complexes between methylcyclohexadienone derivatives and CrCl2O. With the xylenes and mesitylene, di- and trimethylphenols, complexed to CrCl2O, were also observed, respectively. This latter result arises from C-H bond activation and oxygen atom insertion into a C-H bond. The identification of the complexes was further supported by isotopic labeling (2H) and by density functional calculations at the B3LYP/6-311G++(d,2p) level. Product distributions were rationalized by an analysis of the electron density distribution.
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Affiliation(s)
- Michael D Hoops
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, USA
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15
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Rubio JEF, Taravillo M, Baonza VG, Núñez J, Cáceres M. Light-scattering study of vibrational relaxation in liquid xylenes. J Chem Phys 2006; 124:14503. [PMID: 16409037 DOI: 10.1063/1.2137703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Brillouin spectra obtained in dynamic light-scattering experiments are reported for the three isomeric xylenes (ortho-, meta-, and paradimethylbenzenes) between 288 and 363 K. Limiting sound velocities and relaxation times, as obtained from the polarized spectra using the theory developed by Mountain [J. Res. Natl. Bur. Stand. 70A, 207 (1966)], reveal the existence of a relaxation process. Our results suggest that the relaxation process in liquid xylenes has a purely vibrational nature. Vibrational-translational energy exchanges in xylenes are analyzed in terms of available molecular models and compared to those previously obtained for toluene and benzene. The results presented here confirm the important role played by the molecular geometry in the vibrational relaxation process, as the relative arrangement of the methyl groups has significant effect in determining the relaxing vibrational modes.
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Affiliation(s)
- J E F Rubio
- Departamento de Química Física I, Facultad de Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
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16
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Bernshtein V, Oref I. Energy Transfer between Polyatomic Molecules II: Energy Transfer Quantities and Probability Density Functions in Benzene, Toluene, p-Xylene, and Azulene Collisions. J Phys Chem A 2005; 110:1541-51. [PMID: 16435815 DOI: 10.1021/jp053582l] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Collisional energy transfer, CET, is of major importance in chemical, photochemical, and photophysical processes in the gas phase. In Paper I of this series (J. Phys. Chem. B 2005, 109, 8310) we have reported on the mechanism and quantities of CET between an excited benzene and cold benzene and Ar bath. In the present work, we report on CET between excited toluene, p-xylene, and azulene with cold benzene and Ar and on CET of excited benzene with cold toluene, p-xylene, and azulene. We compare our results with those of Paper I and report average vibrational, rotational, and translational energy quantities, <DeltaE>, transferred in a single collision. We discuss the effect of internal rotation on CET and the identity of the gateway modes in CET and the relative role of vibrational, rotational, and translational energies in the CET process, all that as a function of temperature and excitation energy. Energy transfer probability density functions, P(E,E'), for the various systems are reported and the shape of the curves for various systems and initial conditions is discussed. The major findings for polyatomic-polyatomic collisions are: CET takes place mainly via vibration-to-vibration energy transfer assisted by overall rotations. Internal free rotors in the excited molecule hinder energy exchange while in the bath molecule they do not. Energy transfer at low temperatures and high temperatures is more efficient than that at intermediate temperatures. Low-frequency modes are the gateway modes for energy transfer. Vibrational temperatures affect energy transfer. The CET probability density function, P(E,E'), is convex at low temperatures and can be concave at high temperatures. A mechanism that explains the high values of <DeltaE(a)> and the convex shape of P(E,E') is that in addition to short impulsive collisions there are chattering collisions where energy is transferred in a sequence of short encounters during the lifetime of the collision complex. This also leads to the observed supercollision tail at the down wing of P(E,E'). Polyatomic-Ar collisions show mechanistic similarities to polyatomic-polyatomic collisions, but there are also many dissimilarities: internal rotations do not inhibit energy transfer, P(E,E') is concave at all temperatures, and there is no contribution of chattering collisions.
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Affiliation(s)
- V Bernshtein
- Department of Chemistry, Technion-Israel institute of Technology, Haifa 32000, Israel
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17
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Infrared intensities of liquids XXV: Dielectric constants, molar polarizabilities and integrated intensities of liquid toluene at 25°C between 4800 and 400cm−1. J Mol Struct 2005. [DOI: 10.1016/j.molstruc.2005.04.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Xie Y, Boggs JE. The computed force constants and vibrational spectra of toluene. J Comput Chem 2004; 7:158-164. [DOI: 10.1002/jcc.540070209] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/1985] [Accepted: 10/29/1985] [Indexed: 11/10/2022]
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19
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Malow M, Penno M, Weitzel KM. The Kinetics of Methyl Loss from Ethylbenzene and Xylene Ions: The Tropylium versus Benzylium Story Revisited. J Phys Chem A 2003. [DOI: 10.1021/jp0348427] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marcus Malow
- Institut für Chemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
| | - Martin Penno
- Institut für Chemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
| | - Karl-Michael Weitzel
- Institut für Chemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
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20
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Keefe C, Pearson JK, MacDonald A. Optical constants and vibrational assignment of liquid toluene-d8 between 4000 and 450 cm−1 at 25°C. J Mol Struct 2003. [DOI: 10.1016/s0022-2860(03)00212-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Park J, Shum L, Lemoff AS, Werner K, Mullin AS. Methylation effects in state-resolved quenching of highly vibrationally excited azabenzenes (Evib∼38 500 cm−1). II. Collisions with carbon dioxide. J Chem Phys 2002. [DOI: 10.1063/1.1499720] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Bernshtein V, Oref I. Gateway Modes for Collisional Energy Transfer between Benzene and Ar. J Phys Chem A 2001. [DOI: 10.1021/jp012175g] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- V. Bernshtein
- Department of Chemistry, Technion-Israel institute of Technology, Haifa 32000, Israel
| | - I. Oref
- Department of Chemistry, Technion-Israel institute of Technology, Haifa 32000, Israel
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24
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Rubio JEF, Baonza VG, Taravillo M, Núñez J, Cáceres M. A dynamic light scattering study of the hypersonic relaxation in liquid toluene. J Chem Phys 2001. [DOI: 10.1063/1.1389852] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Affiliation(s)
- V. Bernshtein
- Department of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - I. Oref
- Department of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
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26
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Tokmakov IV, Lin MC. Kinetics and mechanism for the H-for-X exchange process in the H + C6H5X reactions: A computational study. INT J CHEM KINET 2001. [DOI: 10.1002/kin.1062] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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Bernshtein V, Oref I. Dynamic Global Potentials and Second Virial Coefficients from Trajectory Calculations. J Phys Chem A 2000. [DOI: 10.1021/jp993451i] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Victor Bernshtein
- Department of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Izhack Oref
- Department of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
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28
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Bernshtein V, Oref I. Energy release in benzene–argon cluster dissociation – quasiclassical trajectory calculations. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(98)01345-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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29
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Bernshtein V, Oref I. Intermolecular energy transfer probabilities from trajectory calculations: A new approach. J Chem Phys 1998. [DOI: 10.1063/1.475750] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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30
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Noskov VG, Kalinina LN, Noskova MN, Kruglyak YL, Strukov OG, Bezrukov AP, Kurochkin VK. 11H-dibenzo[b,e]azepines. Part 1. Synthesis and ir spectra of dibenzo[b,f][1,4]oxazepines. Pharm Chem J 1997. [DOI: 10.1007/bf02464359] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Bernshtein V, Oref I. Collisional energy transfer between Ar and normal and vibrationally and rotationally frozen internally excited benzene-trajectory calculations. J Chem Phys 1997. [DOI: 10.1063/1.473730] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Oh ST, Choe JC, Kim MS. Photodissociation Dynamics of n-Butylbenzene Molecular Ion. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp9605818] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Seong Tae Oh
- Department of Chemistry and Center for Molecular Catalysis, Seoul National University, Seoul 151-742, Korea, and Department of Chemistry, University of Suwon, Kyunggi 445-743, Korea
| | - Joong Chul Choe
- Department of Chemistry and Center for Molecular Catalysis, Seoul National University, Seoul 151-742, Korea, and Department of Chemistry, University of Suwon, Kyunggi 445-743, Korea
| | - Myung Soo Kim
- Department of Chemistry and Center for Molecular Catalysis, Seoul National University, Seoul 151-742, Korea, and Department of Chemistry, University of Suwon, Kyunggi 445-743, Korea
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Repond P, Sigrist MW. Photoacoustic spectroscopy on trace gases with continuously tunable CO(2) laser. APPLIED OPTICS 1996; 35:4065-4085. [PMID: 21102812 DOI: 10.1364/ao.35.004065] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A novel photoacoustic (PA) system that uses a continuously tunable high-pressure CO(2) laser as radiation source is presented. A minimum detectable absorption coefficient of 10(-6) cm(-1) that is limited mainly by the desorption of absorbing species from the cell walls and by residual electromagnetic perturbation of the microphone electronics has currently been achieved. Although a linear dependence of the PA signal on the gas concentration has been observed over 4 orders of magnitude, the dependence on energy exhibits a nonlinear behavior owing to saturation effects in excellent agreement with a theoretical model. The calibration of the laser wavelength is performed by PA measurements on low-pressure CO(2) gas, resulting in an absolute accuracy of ± 10(-2) cm(-1). PA spectra are presented for carbon dioxide (CO(2)), ammonia (NH(3)), ozone (O(3)), ethylene (C(2)H(4)), methanol (CH(3)OH), ethanol (C(2)H(5)OH), and toluene (C(7)H(8)) in large parts of the laser emission range. The expected improvement in detection selectivity compared with that of studies with line-tunable CO(2) lasers is demonstrated with the aid of multicomponent trace-gas mixtures prepared with a gas-mixing unit. Good agreement is obtained between the known concentrations and the concentrations calculated on the basis of a fit with calibration spectra. Finally, the perspectives of the system concerning air analyses are discussed.
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Hickman CG, Gascooke JR, Lawrance WD. TheS1–S0(1B2–1A1) transition of jet‐cooled toluene: Excitation and dispersed fluorescence spectra, fluorescence lifetimes, and intramolecular vibrational energy redistribution. J Chem Phys 1996. [DOI: 10.1063/1.471122] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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35
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Lenzer T, Luther K, Troe J, Gilbert RG, Lim KF. Trajectory simulations of collisional energy transfer in highly excited benzene and hexafluorobenzene. J Chem Phys 1995. [DOI: 10.1063/1.470096] [Citation(s) in RCA: 162] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Fröchtenicht R. The photodissociation of toluene studied by forward photofragment translational spectroscopy. J Chem Phys 1995. [DOI: 10.1063/1.469533] [Citation(s) in RCA: 22] [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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Extended normal coordinate analysis of an (arene)osmium(II) complex with the inclusion of the ring ligand. J Organomet Chem 1994. [DOI: 10.1016/0022-328x(94)80216-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lim KF. Quasiclassical trajectory study of collisional energy transfer in toluene systems. I. Argon bath gas: Energy dependence and isotope effects. J Chem Phys 1994. [DOI: 10.1063/1.466882] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Busca G. Infrared characterization of the hydrocarbon intermediates in the oxidation of toluene and xylenes over vanadia–titania catalysts. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/ft9938900753] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Toselli BM, Barker JR. Excitation of CO2 by energy transfer from highly vibrationally excited benzene derivatives. J Chem Phys 1991. [DOI: 10.1063/1.461290] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mannfors B, Pietilä LO, Palmö K. Molecular mechanics force field for some vinyl and methyl substituted benzenes. J Mol Struct 1991. [DOI: 10.1016/0022-2860(91)80038-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Toselli BM, Brenner JD, Yerram ML, Chin WE, King KD, Barker JR. Vibrational relaxation of highly excited toluene. J Chem Phys 1991. [DOI: 10.1063/1.461473] [Citation(s) in RCA: 94] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Thornton DA, Verhoeven PF, Watkins GM, Desseyn HO, Van der Veken BJ. Isotope labelling studies of some aromatic N-oxides—I. A full vibrational assignment of the infrared and Raman spectra (4000-50 cm−1) of pyrazine N,N′-dioxide and its fully deuterated analogue. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0584-8539(90)80058-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ghosh PN, Panja PK, Pal CM. Local mode mixing of the vibrational overtone manifold of the CH stretching modes in toluene. Chem Phys Lett 1988. [DOI: 10.1016/0009-2614(88)87284-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Pietilä LO, Mannfors B, Palmö K. An in-plane force field for some benzene derivatives having unsaturated substituents. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0584-8539(88)80237-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Palmö K, Mannfors B, Pietilä LO. An out-of-plane force field for some benzene derivatives having unsaturated substituents. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/0584-8539(86)80225-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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