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Alauddin M, Roy M, Song JK, Park SM. Rearrangement of aniline(
H
2
O
)
n
(
n
= 0–12) clusters upon photoionization and their excited state properties: Density functional theory and time‐dependent density functional theory study. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mohammad Alauddin
- Department of Theoretical and Computational Chemistry University of Dhaka Dhaka Bangladesh
| | - Madhusudan Roy
- Department of Computer Science and Engineering University of Science and Technology Chittagong Bangladesh
| | - Jae Kyu Song
- Department of Chemistry Kyung Hee University Seoul Republic of Korea
| | - Seung Min Park
- Department of Chemistry Kyung Hee University Seoul Republic of Korea
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2
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Alauddin M, Roy M, Nam SH, Song JK, Park SM. Structure of
Mono‐Hydrated
Aniline Dimer Cation. B KOREAN CHEM SOC 2020. [DOI: 10.1002/bkcs.12161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mohammad Alauddin
- Department of Theoretical and Computational Chemistry University of Dhaka Dhaka Bangladesh
| | - Madhusudan Roy
- Department of Chemistry Kyung Hee University Seoul 02447 Republic of Korea
| | - Sang Hwan Nam
- Department of Chemistry Kyung Hee University Seoul 02447 Republic of Korea
| | - Jae Kyu Song
- Department of Chemistry Kyung Hee University Seoul 02447 Republic of Korea
| | - Seung Min Park
- Department of Chemistry Kyung Hee University Seoul 02447 Republic of Korea
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3
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Choi HW, Kim KK, Jeong BG, Song JK, Park SM. Structures and infrared photodissociation of [(aniline)-(methanol)-(water) 2] . SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 220:117119. [PMID: 31141781 DOI: 10.1016/j.saa.2019.05.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 04/30/2019] [Accepted: 05/10/2019] [Indexed: 06/09/2023]
Abstract
The structures of [(aniline)-(methanol)-(water)2]+ were investigated by infrared spectroscopy coupled with linear tandem mass spectrometry. We suggest the most stable structure of [(aniline)-(methanol)-(water)2]+ through infrared photodissociation spectra supported by the density functional theory calculations at the level of ωB97X-D/cc-pVQZ. Methanol and one water molecule formed hydrogen bonding with the amino group of aniline, while the other water formed hydrogen bonding with methanol. Upon infrared excitation of [(aniline)-(methanol)-(water)2]+, the water molecule connected to methanol turned out to be preferentially ejected, although the total internal energy in the cluster ion was large enough to dissociate other solvent molecules. This unique dissociation feature was attributed to the significant difference in the dissociation rates as obtained by the Rice-Ramsperger-Kassel-Marcus theory calculations as well as structural restriction.
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Affiliation(s)
- Hyun Wook Choi
- Department of Chemistry, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Kuk Ki Kim
- Department of Chemistry, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Bong Gyu Jeong
- Department of Chemistry, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Jae Kyu Song
- Department of Chemistry, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Seung Min Park
- Department of Chemistry, Kyung Hee University, Seoul 02447, Republic of Korea.
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Roy M, Alauddin M, Song JK, Park SM. Structures of aniline(pyrrole) +, aniline(ethanol) +, and aniline-(benzene) . SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:665-669. [PMID: 29982157 DOI: 10.1016/j.saa.2018.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 06/14/2018] [Accepted: 07/01/2018] [Indexed: 06/08/2023]
Abstract
Molecular structures of aniline(pyrrole)+, aniline(ethanol)+, and aniline(benzene)+ produced via resonance two-photon ionization at 266 nm were analyzed by infrared predissociation spectroscopy coupled with tandem mass spectrometry. Structural optimization and frequency calculation using density functional theory were carried out to suggest the most probable isomers which are in good agreement with the observed infrared absorption spectra. Intermolecular bonds in the cluster ions were formed such that the electronegative oxygen atom of the solvent molecule or the pi electron of the aromatic ring forms a hydrogen bonding to NH of aniline.
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Affiliation(s)
- Madhusudan Roy
- Department of Chemistry, Kyung Hee University, Seoul 02447, South Korea
| | - Mohammad Alauddin
- Department of Chemistry, Kyung Hee University, Seoul 02447, South Korea
| | - Jae Kyu Song
- Department of Chemistry, Kyung Hee University, Seoul 02447, South Korea
| | - Seung Min Park
- Department of Chemistry, Kyung Hee University, Seoul 02447, South Korea.
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Heiles S, Cooper RJ, DiTucci MJ, Williams ER. Sequential water molecule binding enthalpies for aqueous nanodrops containing a mono-, di- or trivalent ion and between 20 and 500 water molecules. Chem Sci 2017; 8:2973-2982. [PMID: 28451364 PMCID: PMC5380113 DOI: 10.1039/c6sc04957e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 01/26/2017] [Indexed: 12/16/2022] Open
Abstract
Sequential water molecule binding enthalpies, ΔHn,n-1, are important for a detailed understanding of competitive interactions between ions, water and solute molecules, and how these interactions affect physical properties of ion-containing nanodrops that are important in aerosol chemistry. Water molecule binding enthalpies have been measured for small clusters of many different ions, but these values for ion-containing nanodrops containing more than 20 water molecules are scarce. Here, ΔHn,n-1 values are deduced from high-precision ultraviolet photodissociation (UVPD) measurements as a function of ion identity, charge state and cluster size between 20-500 water molecules and for ions with +1, +2 and +3 charges. The ΔHn,n-1 values are obtained from the number of water molecules lost upon photoexcitation at a known wavelength, and modeling of the release of energy into the translational, rotational and vibrational motions of the products. The ΔHn,n-1 values range from 36.82 to 50.21 kJ mol-1. For clusters containing more than ∼250 water molecules, the binding enthalpies are between the bulk heat of vaporization (44.8 kJ mol-1) and the sublimation enthalpy of bulk ice (51.0 kJ mol-1). These values depend on ion charge state for clusters with fewer than 150 water molecules, but there is a negligible dependence at larger size. There is a minimum in the ΔHn,n-1 values that depends on the cluster size and ion charge state, which can be attributed to the competing effects of ion solvation and surface energy. The experimental ΔHn,n-1 values can be fit to the Thomson liquid drop model (TLDM) using bulk ice parameters. By optimizing the surface tension and temperature change of the logarithmic partial pressure for the TLDM, the experimental sequential water molecule binding enthalpies can be fit with an accuracy of ±3.3 kJ mol-1 over the entire range of cluster sizes.
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Affiliation(s)
- Sven Heiles
- Department of Chemistry , University of California , Berkeley B42 Hildebrand Hall , Berkeley , California 94720-1460 , USA . ; Tel: +1-510-643-7161
| | - Richard J Cooper
- Department of Chemistry , University of California , Berkeley B42 Hildebrand Hall , Berkeley , California 94720-1460 , USA . ; Tel: +1-510-643-7161
| | - Matthew J DiTucci
- Department of Chemistry , University of California , Berkeley B42 Hildebrand Hall , Berkeley , California 94720-1460 , USA . ; Tel: +1-510-643-7161
| | - Evan R Williams
- Department of Chemistry , University of California , Berkeley B42 Hildebrand Hall , Berkeley , California 94720-1460 , USA . ; Tel: +1-510-643-7161
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7
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A collinear tandem time-of-flight mass spectrometer for infrared photodissociation spectroscopy of mass-selected ions. Sci China Chem 2013. [DOI: 10.1007/s11426-013-4979-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Alauddin M, Song JK, Choe JC, Park SM. Infrared predissociation of ternary cluster cations: the solvent effects on the branching ratio. Phys Chem Chem Phys 2012; 14:3864-71. [PMID: 22331177 DOI: 10.1039/c2cp23924h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Infrared (IR) predissociation of hydrogen-bonded ternary cluster ions such as aniline-water-ethanol (AWE(+)), aniline-water-isopropanol (AWP(+)), aniline-methanol-ethanol (AME(+)), aniline-water-pyrrole (AWPy(+)), and aniline-water-benzene (AWB(+)) was examined in the region of 2700-4000 cm(-1) to explore the key factors which determine the branching ratios in the concurrent unimolecular dissociation. The smaller solvent molecule was predominantly ejected when the binding energies of the two were not too different. On the other hand, when they were far off, the binding energy also acted significantly on the branching ratio. Besides, mode-selective IR predissociation was observed, while the selectivity was not quite distinct. The IR predissociation of ternary cluster ions bound via hydrogen bonding is considered to occur on a time scale much faster than intramolecular vibrational energy redistribution, which was proved by a statistical transition state theory.
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Affiliation(s)
- Md Alauddin
- Department of Chemistry and Research Center for New Nano Bio Fusion Technology, Kyung Hee University, Seoul, Republic of Korea
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The kinetic energy release in the photodissociation of aniline(water)n+ (n= 1–10) clusters at photon energies from 0.43 to 4.66 eV. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.03.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Donald WA, Leib RD, Demireva M, Negru B, Neumark DM, Williams ER. Average sequential water molecule binding enthalpies of M(H2O)(19-124)2+ (M = Co, Fe, Mn, and Cu) measured with ultraviolet photodissociation at 193 and 248 nm. J Phys Chem A 2010; 115:2-12. [PMID: 21142113 DOI: 10.1021/jp107547r] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The average sequential water molecule binding enthalpies to large water clusters (between 19 and 124 water molecules) containing divalent ions were obtained by measuring the average number of water molecules lost upon absorption of an UV photon (193 or 248 nm) and using a statistical model to account for the energy released into translations, rotations, and vibrations of the products. These values agree well with the trend established by more conventional methods for obtaining sequential binding enthalpies to much smaller hydrated divalent ions. The average binding enthalpies decrease to a value of ~10.4 kcal/mol for n > ~40 and are insensitive to the ion identity at large cluster size. This value is close to that of the bulk heat of vaporization of water (10.6 kcal/mol) and indicates that the structure of water in these clusters may more closely resemble that of bulk liquid water than ice, owing either to a freezing point depression or rapid evaporative cooling and kinetic trapping of the initial liquid droplet. A discrete implementation of the Thomson equation using parameters for liquid water at 0 °C generally fits the trend in these data but provides values that are ~0.5 kcal/mol too low.
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Affiliation(s)
- William A Donald
- Department of Chemistry, University of California, Berkeley, California 94720-1460, USA
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Alauddin M, Song JK, Park SM. The branching ratio in the infrared predissociation of aniline–water–methanol+ ion. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.08.063] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Rajput J, Rahbek DB, Aravind G, Andersen LH. Spectral tuning of the photoactive yellow protein chromophore by H-bonding. Biophys J 2010; 98:488-92. [PMID: 20141763 DOI: 10.1016/j.bpj.2009.10.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2009] [Revised: 10/19/2009] [Accepted: 10/19/2009] [Indexed: 11/24/2022] Open
Abstract
Spectral tuning in the photoactive yellow protein (PYP) is investigated by performing gas-phase absorption measurements on a PYP-model chromophore with two water molecules hydrogen-bonded to it. The photoabsorption maximum shows an unusually large blue shift of 0.71 eV in going from the bare to the hydrogen-bonded chromophore. It is concluded that several interactions within the PYP protein are mutually cancelling each other, yielding an absorption maximum that is close to the absorption maximum of the bare chromophore. The system breaks apart upon photoexcitation in the gas phase by releasing the two water molecules, leaving the chromophore itself intact. The hydrogen-bonding interactions thus play an important role in stabilizing the gas phase chromophore against photofragmentation. The relaxation dynamics for the breakup process was also studied, and the timescale of relaxation via fragmentation was found to be < 25 ns.
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Affiliation(s)
- J Rajput
- Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
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Höckendorf RF, Balaj OP, Linde CVD, Beyer MK. Thermochemistry from ion–molecule reactions of hydrated ions in the gas phase: a new variant of nanocalorimetry reveals product energy partitioning. Phys Chem Chem Phys 2010; 12:3772-9. [DOI: 10.1039/b921395c] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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15
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Nam SH, Park HS, Ryu S, Song JK, Park SM. Photodissociation dynamics of adenine dimer radical ions and hydrated adenine dimer ions, A2+(H2O)n (n=0–6). Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2007.11.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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