1
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Ahamed SS, Mahanta H, Paul AK. An advanced bath model to simulate association followed by ensuing dissociation dynamics of benzene + benzene system: a comparative study of gas and condensed phase results. Phys Chem Chem Phys 2022; 24:23825-23839. [PMID: 36164966 DOI: 10.1039/d2cp02483g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The role of the environment (N2 molecules) on the association followed by the ensuing dissociation reaction of benzene + benzene system is studied here with the help of a new code setup. Chemical dynamics simulations are performed to investigate this reaction in vacuum as well as in a bath of 1000 N2 molecules, equilibrated at 300 K. Bath densities of 20 and 324 kg m-3 are considered with a few results from the latter density. The simulations are performed at three different excitation temperatures of benzene, namely, 1000, 1500, and 2000 K, with an impact parameter range of 0-12 Å for both vacuum and bath models. Higher association probabilities and hence, higher temperature dependent association rate constants are obtained in the condensed phase. In the condensed phase, when a trajectory takes a longer time for the monomers to associate, the associated complex is formed with a longer lifetime and provides a lower rate of ensuing dissociation. Higher association rate and lower dissociation rate in condensed phase dynamics are due to the energy transfer process. Hence, the energy transfer phenomenon plays a decisive role in the association/dissociation dynamics, which is completely ignored in the same reaction when studied in vacuum.
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Affiliation(s)
- Sk Samir Ahamed
- Department of Chemistry, National Institute of Technology Meghalaya, Shillong 793003, Meghalaya, India.
| | - Himashree Mahanta
- Department of Chemistry, National Institute of Technology Meghalaya, Shillong 793003, Meghalaya, India.
| | - Amit K Paul
- Department of Chemistry, National Institute of Technology Meghalaya, Shillong 793003, Meghalaya, India.
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2
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Ahamed SS, Kumar P, Kalita H, Paul AK. Mode‐to‐Mode Collision Energy Transfer from Vibrationally Excited C
6
F
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to NO/N
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Mixed Bath with the Development of New Potential Energy Functions. ChemistrySelect 2020. [DOI: 10.1002/slct.202002600] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sk. Samir Ahamed
- Department of Chemistry National Institute of Technology Meghalaya Shillong Meghalaya 793003 INDIA
| | - Pavan Kumar
- Department of Chemistry National Institute of Technology Meghalaya Shillong Meghalaya 793003 INDIA
| | - Hrishikesh Kalita
- Department of Chemistry National Institute of Technology Meghalaya Shillong Meghalaya 793003 INDIA
- Department of Chemistry Indian Institute of Technology Guwahati Guwahati Assam 781039 INDIA
| | - Amit K. Paul
- Department of Chemistry National Institute of Technology Meghalaya Shillong Meghalaya 793003 INDIA
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3
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Ahamed SS, Mahanta H, Paul AK. A Competition between Dissociation Pathway and Energy Transfer Pathway: Unimolecular Dissociation of a Benzene-Hexafluorobenzene Complex in Nitrogen Bath. J Phys Chem A 2019; 123:10663-10675. [PMID: 31755713 DOI: 10.1021/acs.jpca.9b07258] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The unimolecular dissociation of a benzene-hexafluorobenzene complex at 1000, 1500, and 2000 K is studied inside a bath of 1000 N2 molecules kept at 300 K using chemical dynamics simulation. Three bath densities of 20, 324, and 750 kg/m3 are considered. The dissociation dynamics of the complex at a 20 kg/m3 bath density is found to be similar to that in the gas phase, whereas the dynamics is drastically different at higher bath densities. The microcanonical/canonical dissociation rate constants for the three bath densities are calculated and fitted to the Arrhenius equation. The activation energies are found to be similar to the gas-phase one. However, the pre-exponential factor is lower and decreases with the increase in bath density. The vibrational degree of freedom of the complex more effectively participates in the collisional energy transfer to the N2 bath, whereas the translational and rotational degrees of freedom of N2 receive the transferred energy. The energy transfer efficiency increases with the increase in bath density. The time scale of the energy transfer pathway is more than that of the dissociation pathway, and negligible direct dissociation of the complex is observed from the simulation at the highest bath density.
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Affiliation(s)
- Sk Samir Ahamed
- Department of Chemistry , National Institute of Technology Meghalaya , Shillong 793003 , Meghalaya , India
| | - Himashree Mahanta
- Department of Chemistry , National Institute of Technology Meghalaya , Shillong 793003 , Meghalaya , India
| | - Amit K Paul
- Department of Chemistry , National Institute of Technology Meghalaya , Shillong 793003 , Meghalaya , India
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4
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Kim H, Bhandari HN, Pratihar S, Hase WL. Chemical Dynamics Simulation of Energy Transfer: Propylbenzene Cation and N2 Collisions. J Phys Chem A 2019; 123:2301-2309. [PMID: 30794410 DOI: 10.1021/acs.jpca.9b00111] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Experiments on collisional energy transfer. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/b978-0-444-64207-3.00001-9] [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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6
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Kim H, Saha B, Pratihar S, Majumder M, Hase WL. Chemical Dynamics Simulations of Energy Transfer for Propylbenzene Cation and He Collisions. J Phys Chem A 2017; 121:7494-7502. [DOI: 10.1021/acs.jpca.7b07982] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hyunsik Kim
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Biswajit Saha
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Subha Pratihar
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Moumita Majumder
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - William L. Hase
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
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7
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Shen X, Wang S, Dai K, Shen Y. Nascent rotational distribution for LiH(v=0-3,J) states from collisions with H 2(E=4300 and 4800cm -1). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 173:516-526. [PMID: 27741492 DOI: 10.1016/j.saa.2016.09.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 08/28/2016] [Accepted: 09/26/2016] [Indexed: 06/06/2023]
Abstract
Rotationally state selective excitation of H2(v=1, J=1 or 3) was achieved by stimulated Raman pumping. The full state-resolved distribution of scattered LiH(v=0-3, J=0~13)molecules from collisions with excited H2(E=4300 and 4800cm-1) is reported. Nascent rotational and translational energy profiles for scattered LiH(v=0~3) molecules with J=0~13 were measured using high-resolution transient laser induced fluorescence(LIF). The product translational energy for individual J-states increases by 120% for a 13% increase in donor energy. The scattered LiH(v=0, J=0~13) molecules have a biexponential rotational distribution. Fitting the data with a two-component exponential model yields a low-energy distribution and a high-energy distribution. The rotational distribution is sensitive to donor energy. Rotational distributions of scatted LiH(v=1-3) molecules were also measured. The distribution yielded rotational temperatures at 690K for LiH/H2(E=4300cm-1) and 730K for LiH/H2(E=4800cm-1), respectively. The rate constants for appearance LiH(v=0-3,J) were determined.
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Affiliation(s)
- Xiaoyan Shen
- School of Chemistry and Molecular Engineering, East China University of Sci.&Tech., Shanghai, 200237, China
| | - Shuying Wang
- School of Physics, Xinjiang University, Urumqi, 830046, China
| | - Kang Dai
- School of Physics, Xinjiang University, Urumqi, 830046, China
| | - Yifan Shen
- School of Physics, Xinjiang University, Urumqi, 830046, China
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Paul AK, Kohale SC, Pratihar S, Sun R, North SW, Hase WL. A unified model for simulating liquid and gas phase, intermolecular energy transfer: N2+ C6F6collisions. J Chem Phys 2014; 140:194103. [DOI: 10.1063/1.4875516] [Citation(s) in RCA: 28] [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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9
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Du J, Sassin NA, Havey DK, Hsu K, Mullin AS. Full State-Resolved Energy Gain Profiles of CO2 from Collisions with Highly Vibrationally Excited Molecules. II. Energy-Dependent Pyrazine (E = 32 700 and 37 900 cm–1) Relaxation. J Phys Chem A 2013; 117:12104-15. [DOI: 10.1021/jp404939s] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Juan Du
- Department of Chemistry & Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Nicholas A. Sassin
- Department of Chemistry & Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Daniel K. Havey
- Department of Chemistry & Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Kailin Hsu
- Department of Chemistry & Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Amy S. Mullin
- Department of Chemistry & Biochemistry, University of Maryland, College Park, Maryland 20742, United States
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Hsu HC, Tsai MT, Dyakov YA, Ni CK. Energy transfer of highly vibrationally excited molecules studied by crossed molecular beam/time-sliced velocity map ion imaging. INT REV PHYS CHEM 2012. [DOI: 10.1080/0144235x.2012.673282] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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11
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Barker JR, Weston RE. Collisional Energy Transfer Probability Densities P(E, J; E′, J′) for Monatomics Colliding with Large Molecules. J Phys Chem A 2010; 114:10619-33. [DOI: 10.1021/jp106443d] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- John R. Barker
- Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109-2143, and Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973
| | - Ralph E. Weston
- Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109-2143, and Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973
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12
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Yuan L, Du J, Mullin AS. Energy-dependent dynamics of large-ΔE collisions: Highly vibrationally excited azulene (E=20390 and 38580cm−1) with CO2. J Chem Phys 2008; 129:014303. [DOI: 10.1063/1.2943668] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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13
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Johnson JA, Kim K, Mayhew M, Mitchell DG, Sevy ET. Rotationally resolved IR-diode laser studies of ground-state CO2 excited by collisions with vibrationally excited pyridine. J Phys Chem A 2008; 112:2543-52. [PMID: 18321080 DOI: 10.1021/jp076543d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Relaxation of highly vibrationally excited pyridine (C5NH5) by collisions with carbon dioxide has been investigated using diode laser transient absorption spectroscopy. Vibrationally hot pyridine (E' = 40,660 cm(-1)) was prepared by 248 nm excimer laser excitation followed by rapid radiationless relaxation to the ground electronic state. Pyridine then collides with CO2, populating the high rotational CO2 states with large amounts of translational energy. The CO2 nascent rotational population distribution of the high-J (J = 58-80) tail of the 00(0)0 state was probed at short times following the excimer laser pulse to measure rate constants and probabilities for collisions populating these CO2 rotational states. Doppler spectroscopy was used to measure the CO2 recoil velocity distribution for J = 58-80 of the 00(0)0 state. The energy-transfer distribution function, P(E,E'), from E' - E approximately 1300-7000 cm(-1) was obtained by re-sorting the state-indexed energy-transfer probabilities as a function of DeltaE. P(E,E') is fit to an exponential or biexponential function to determine the average energy transferred in a single collision between pyridine and CO2. Also obtained are fit parameters that can be compared to previously studied systems (pyrazine, C6F6, methylpyrazine, and pyrimidine/CO2). Although the rotational and translational temperatures that describe pyridine/CO2 energy transfer are similar to previous systems, the energy-transfer probabilities are much smaller. P(E,E') fit parameters for pyridine/CO2 and the four previously studied systems are compared to various donor molecular properties. Finally, P(E,E') is analyzed in the context of two models, one indicating that P(E,E') shape is primarily determined by the low-frequency out-of-plane donor vibrational modes, and the other that indicates that P(E,E') shape can be determined from how the donor molecule final density of states changes with DeltaE.
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Affiliation(s)
- Jeremy A Johnson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA
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14
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Johnson JA, Duffin AM, Hom BJ, Jackson KE, Sevy ET. Quenching of highly vibrationally excited pyrimidine by collisions with CO2. J Chem Phys 2008; 128:054304. [DOI: 10.1063/1.2825599] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Duffin AM, Johnson JA, Muyskens MA, Sevy ET. Competition between Photochemistry and Energy Transfer in UV-Excited Diazabenzenes. 4. UV Photodissociation of 2,3-, 2,5-, and 2,6-Dimethylpyrazine. J Phys Chem A 2007; 111:13330-8. [DOI: 10.1021/jp0762471] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew M. Duffin
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Jeremy A. Johnson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Mark A. Muyskens
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Eric T. Sevy
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
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16
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Li Z, Korobkova E, Werner K, Shum L, Mullin AS. State-resolved collisional quenching of vibrationally excited pyrazine (E(vib) = 37,900 cm(-1)) by D35Cl(v = 0). J Chem Phys 2005; 123:174306. [PMID: 16375527 DOI: 10.1063/1.2098647] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Supercollision relaxation of highly vibrationally excited pyrazine (E(vib) = 37,900 cm(-1)) with D35Cl is investigated using high-resolution transient IR diode laser absorption spectroscopy at 4.4 microm. Highly excited pyrazine is prepared by pulsed UV excitation at 266 nm, followed by rapid radiationless decay to the ground electronic state. The rotational energy distribution of the scattered DCl (v = 0,J) molecules with J = 15-21 is characterized by T(rot) = 755+/-90 K. The relative translational energy increases as a function of rotational quantum number for DCl with T(rel) = 710+/-190 K for J = 15 and T(rel) = 1270+/-240 K for J = 21. The average change in recoil velocity correlates with the change in rotational angular momentum quantum number and highlights the role of angular momentum in energy gain partitioning. The integrated energy-transfer rate for appearance of DCl (v = 0,J = 15-21) is k(2)(int) = 7.1x10(-11) cm3 molecule(-1) s(-1), approximately one-eighth the Lennard-Jones collision rate. The results are compared to earlier energy gain measurements of CO2 and H2O.
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Affiliation(s)
- Ziman Li
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, USA
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17
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Tasić US, Parmenter CS. Test of a chemical timing method for measuring absolute vibrational relaxation rate constants for S1 p-difluorobenzene. J Phys Chem B 2005; 109:8297-303. [PMID: 16851972 DOI: 10.1021/jp040396r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A chemical timing (CT) method for measuring absolute rate constants for collisional vibrational relaxation has been tested for the 5(1) state of S(1) p-difluorobenzene (pDFB) where an alternative method exists to provide benchmark values. The CT method was originally developed to treat vibrational energy transfer (VET) in large molecules excited to high vibrational levels where the intramolecular vibrational redistribution (IVR) resulting from large vibrational state densities completely eliminates vibrational structure in the emission spectrum. Here we apply the same method to a low-lying state (5(1) with epsilon(vib) = 818 cm(-1)) located in the low-density region of the vibrational manifold where IVR plays no role. For high vibrational levels, the chemical timing method involves addition of high O(2) pressures (kTorr) to a low-pressure pDFB sample, introducing vibrational structure in the fluorescence spectrum. Response of this spectrum to vibrational relaxation by Ar is then examined. For levels such as 5(1), the fully structured fluorescence spectrum allows the rate constant for single-collision VET into the surrounding vibrational field to be measured directly without the presence of O(2). The measurements of 5(1) VET have been repeated with various O(2) pressures (kTorr) for comparison with the O(2)-free benchmark. In the presence of O(2), the rate constant for VET by Ar is (4.0 +/- 0.5) x 10(6) Torr(-1) s(-1) and independent of high O(2) pressure variations. The rate constant as found by the standard O(2)-free method is (3.6 +/- 0.4) x 10(6) Torr(-1) s(-1). This comparison suggests that the chemical timing method is capable of providing a reasonably accurate measure of the VET rate constant for high vibrational levels provided that details of the kinetics are known.
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Affiliation(s)
- Uros S Tasić
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, USA
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18
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Kimura Y, Abe D, Terazima M. Vibrational energy relaxation of naphthalene in the S(1) state in various gases. J Chem Phys 2004; 121:5794-800. [PMID: 15367005 DOI: 10.1063/1.1786925] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Time-resolved fluorescence spectra of naphthalene in the S(1) state have been measured in various gases below 10(2) kPa. The band shape of the fluorescence changed in an earlier time region after the photoexcitation when an excess energy (3300 cm(-1)) above the 0-0 transition energy was given. The excitation energy dependence of the fluorescence band shape of an isolated naphthalene molecule was measured separately, and the time dependence of the fluorescence band shape in gases was found to be due to the vibrational energy relaxation in the S(1) state. We have succeeded in determining the transient excess vibrational energy by comparing the time-resolved fluorescence band shape with the excitation energy dependence of the fluorescence band shape. The excess vibrational energy decayed almost exponentially. From the slope of the decay rate against the buffer gas pressure, we have determined the collisional decay rate of the excess vibrational energy in various gases. The dependence of the vibrational energy relaxation rate on the buffer gas species was similar to the case of azulene. The comparisons with the results in the low temperature argon and the energy relaxation rate in the S(0) state in nitrogen were also discussed.
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Affiliation(s)
- Y Kimura
- Division of Research Initiatives, International Innovation Center, Kyoto University, Kyoto 606-8501, Japan
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19
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Higgins CJ, Chapman S. Collisional Energy Transfer between Hot Pyrazine and Cold CO: A Classical Trajectory Study. J Phys Chem A 2004. [DOI: 10.1021/jp040140l] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cortney J. Higgins
- Department of Chemistry, Barnard College, Columbia University, New York, New York 10025
| | - Sally Chapman
- Department of Chemistry, Barnard College, Columbia University, New York, New York 10025
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20
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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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21
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Park J, Li Z, Lemoff AS, Rossi C, Elioff MS, Mullin AS. Energy-Dependent Quantum-State-Resolved Relaxation of Highly Vibrationally Excited Pyridine (Evib = 36 990−40 200 cm-1) through Collisions with CO2. J Phys Chem A 2002. [DOI: 10.1021/jp012270p] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jeunghee Park
- Department of Chemistry, Arthur G. B. Metcalf Center for Science and Engineering, Boston University, Boston, Massachusetts 02215
| | - Ziman Li
- Department of Chemistry, Arthur G. B. Metcalf Center for Science and Engineering, Boston University, Boston, Massachusetts 02215
| | - Andrew S. Lemoff
- Department of Chemistry, Arthur G. B. Metcalf Center for Science and Engineering, Boston University, Boston, Massachusetts 02215
| | - Craig Rossi
- Department of Chemistry, Arthur G. B. Metcalf Center for Science and Engineering, Boston University, Boston, Massachusetts 02215
| | - Michael S. Elioff
- Department of Chemistry, Arthur G. B. Metcalf Center for Science and Engineering, Boston University, Boston, Massachusetts 02215
| | - Amy S. Mullin
- Department of Chemistry, Arthur G. B. Metcalf Center for Science and Engineering, Boston University, Boston, Massachusetts 02215
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22
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Stone TA, Parmenter CS. Absolute Rate Constants for Collisional Vibrational Relaxation in Dense Vibrational Regions of S1 p-Difluorobenzene. J Phys Chem A 2002. [DOI: 10.1021/jp0121365] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Todd A. Stone
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405
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Elioff MS, Sansom RL, Mullin AS. Vibrational Energy Gain in the ν2 Bending Mode of Water via Collisions with Hot Pyrazine (Evib = 37900 cm-1): Insights into the Dynamics of Energy Flow. J Phys Chem A 2000. [DOI: 10.1021/jp001425a] [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)
- Michael S. Elioff
- Department of Chemistry, Arthur G. B. Metcalf Center for Science and Engineering, Boston University, Boston, Massachusetts 02215
| | - Rebecca L. Sansom
- Department of Chemistry, Arthur G. B. Metcalf Center for Science and Engineering, Boston University, Boston, Massachusetts 02215
| | - Amy S. Mullin
- Department of Chemistry, Arthur G. B. Metcalf Center for Science and Engineering, Boston University, Boston, Massachusetts 02215
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25
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Bae SY, Lee IJ, Park J. Methylation effects on the collisional quenching of vibrationally excited benzene derivatives by unexcited parent molecules. Chem Phys 2000. [DOI: 10.1016/s0301-0104(00)00066-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Sevy ET, Michaels CA, Tapalian HC, Flynn GW. Competition between photochemistry and energy transfer in ultraviolet-excited diazabenzenes. II. Identifying the dominant energy donor for “supercollisions”. J Chem Phys 2000. [DOI: 10.1063/1.481158] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Eric T. Sevy
- Department of Chemistry and Columbia Radiation Laboratory, Columbia University, New
York, New York 10027
| | - Chris A. Michaels
- Department of Chemistry and Columbia Radiation Laboratory, Columbia University, New
York, New York 10027
| | - H. Charles Tapalian
- Department of Chemistry and Columbia Radiation Laboratory, Columbia University, New
York, New York 10027
| | - George W. Flynn
- Department of Chemistry and Columbia Radiation Laboratory, Columbia University, New
York, New York 10027
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27
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Hold U, Lenzer T, Luther K, Reihs K, Symonds AC. Collisional energy transfer probabilities of highly excited molecules from kinetically controlled selective ionization (KCSI). I. The KCSI technique: Experimental approach for the determination of P(E′,E) in the quasicontinuous energy range. J Chem Phys 2000. [DOI: 10.1063/1.480957] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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28
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Wall MC, Lemoff AE, Mullin AS. Unraveling the energy dependence in large ΔE (V→RT) energy transfer: Separation of ΔE and probability in the collisional relaxation of highly vibrationally excited pyrazine (Evib=36 000 to 41 000 cm−1) by CO2. J Chem Phys 1999. [DOI: 10.1063/1.480060] [Citation(s) in RCA: 21] [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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29
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Myers D, Shigeiwa M, Fayer M, Silbey R. Non-exponential relaxation of a single quantum vibrational excitation of a large molecule in collision free gas phase at elevated temperature. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)00961-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Elioff MS, Fraelich M, Sansom RL, Mullin AS. State-resolved collisional quenching of highly vibrationally excited pyridine by water: The role of strong electrostatic attraction in V→RT energy transfer. J Chem Phys 1999. [DOI: 10.1063/1.479635] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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