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George MAR, Dopfer O. Microhydrated clusters of a pharmaceutical drug: infrared spectra and structures of amantadineH +(H 2O) n. Phys Chem Chem Phys 2023; 25:5529-5549. [PMID: 36723361 DOI: 10.1039/d2cp04556g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Solvation of pharmaceutical drugs has an important effect on their structure and function. Analysis of infrared photodissociation spectra of amantadineH+(H2O)n=1-4 clusters in the sensitive OH, NH, and CH stretch range by quantum chemical calculations (B3LYP-D3/cc-pVTZ) provides a first impression of the interaction of this pharmaceutically active cation with water at the molecular level. The size-dependent frequency shifts reveal detailed information about the acidity of the protons of the NH3+ group of N-protonated amantadineH+ (AmaH+) and the strength of the NH⋯O and OH⋯O hydrogen bonds (H-bonds) of the hydration network. The preferred cluster growth begins with sequential hydration of the NH3+ group by NH⋯O ionic H-bonds (n = 1-3), followed by the extension of the solvent network through OH⋯O H-bonds. However, smaller populations of cluster isomers with an H-bonded solvent network and free N-H bonds are already observed for n ≥ 2, indicating the subtle competition between noncooperative ion hydration and cooperative H-bonding. Interestingly, cyclic water ring structures are identified for n ≥ 3, each with two NH⋯O and two OH⋯O H-bonds. Despite the increasing destabilization of the N-H proton donor bonds upon gradual hydration, no proton transfer to the (H2O)n solvent cluster is observed up to n = 4. In addition to ammonium cluster ions, a small population of microhydrated iminium isomers is also detected, which is substantially lower for the hydrophilic H2O than for the hydrophobic Ar environment.
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Affiliation(s)
| | - Otto Dopfer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany.
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2
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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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3
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George MAR, Dopfer O. Opening of the Diamondoid Cage upon Ionization Probed by Infrared Spectra of the Amantadine Cation Solvated by Ar, N 2 , and H 2 O. Chemistry 2022; 28:e202200577. [PMID: 35611807 PMCID: PMC9400954 DOI: 10.1002/chem.202200577] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Indexed: 01/18/2023]
Abstract
Radical cations of diamondoids, a fundamental class of very stable cyclic hydrocarbon molecules, play an important role in their functionalization reactions and the chemistry of the interstellar medium. Herein, we characterize the structure, energy, and intermolecular interaction of clusters of the amantadine radical cation (Ama+, 1‐aminoadamantane) with solvent molecules of different interaction strength by infrared photodissociation (IRPD) spectroscopy of mass‐selected Ama+Ln clusters, with L=Ar (n≤3) and L=N2 and H2O (n=1), and dispersion‐corrected density functional theory calculations (B3LYP−D3/cc‐pVTZ). Three isomers of Ama+ generated by electron ionization are identified by the vibrational properties of their rather different NH2 groups. The ligands bind preferentially to the acidic NH2 protons, and the strength of the NH…L ionic H‐bonds are probed by the solvation‐induced red‐shifts in the NH stretch modes. The three Ama+ isomers include the most abundant canonical cage isomer (I) produced by vertical ionization, which is separated by appreciable barriers from two bicyclic distonic iminium ions obtained from cage‐opening (primary radical II) and subsequent 1,2 H‐shift (tertiary radical III), the latter of which is the global minimum on the Ama+ potential energy surface. The effect of solvation on the energetics of the potential energy profile revealed by the calculations is consistent with the observed relative abundance of the three isomers. Comparison to the adamantane cation indicates that substitution of H by the electron‐donating NH2 group substantially lowers the barriers for the isomerization reaction.
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Affiliation(s)
| | - Otto Dopfer
- Institut für Optik und Atomare PhysikTechnische Universität BerlinHardenbergstr. 3610623BerlinGermany
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4
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Rao Z, Cao Y, Huang Z, Yin Z, Wan W, Ma M, Wu Y, Wang J, Yang G, Cui Y, Gong Z, Zhou Y. Insights into the Nonthermal Effects of Light in Dry Reforming of Methane to Enhance the H 2/CO Ratio Near Unity over Ni/Ga 2O 3. ACS Catal 2021. [DOI: 10.1021/acscatal.0c04826] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhiqiang Rao
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
- School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Yuehan Cao
- School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Zeai Huang
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
- School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Zihang Yin
- School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Wenchao Wan
- School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Minzhi Ma
- School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Yanxin Wu
- School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Junbu Wang
- School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Guidong Yang
- XJTU-Oxford International Joint Laboratory for Catalysis, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China
| | - Yi Cui
- Vacuum Interconnected Nanotech Workstation, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Zhongmiao Gong
- Vacuum Interconnected Nanotech Workstation, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Ying Zhou
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
- School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
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5
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George MAR, Buttenberg F, Förstel M, Dopfer O. Microhydration of substituted diamondoid radical cations of biological relevance: infrared spectra of amantadine +-(H 2O) n = 1-3 clusters. Phys Chem Chem Phys 2020; 22:28123-28139. [PMID: 33290468 DOI: 10.1039/d0cp05299j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Hydration of biomolecules and pharmaceutical compounds has a strong impact on their structure, reactivity, and function. Herein, we explore the microhydration structure around the radical cation of the widespread pharmaceutical drug amantadine (C16H15NH2, Ama) by infrared photodissociation (IRPD) spectroscopy of mass-selected Ama+Wn = 1-3 clusters (W = H2O) recorded in the NH, CH, and OH stretch range of the cation ground electronic state. Analysis of the size-dependent frequency shifts by dispersion-corrected density functional theory calculations (B3LYP-D3/cc-pVTZ) provides detailed information about the acidity of the protons of the NH2 group of Ama+ and the structure and strength of the NHO and OHO hydrogen bonds (H-bonds) of the hydration network. The preferred sequential cluster growth begins with hydration of the two acidic NH protons of the NH2 group (n = 1-2) and continues with an extension of the H-bonded hydration network by forming an OHO H-bond of the third W to one ligand in the first hydration subshell (n = 3), like in the W2 dimer. For n = 2, a minor population corresponds to Ama+W2 structures with a W2 unit attached to Ama+via a NHW2 H-bond. Although the N-H proton donor bonds are progressively destabilized by gradual microhydration, no proton transfer to the Wn solvent cluster is observed in the investigated size range (n ≤ 3). Besides the microhydration structure, we also obtain a first impression of the structure and IR spectrum of bare Ama+, as well as the effects of both ionization and hydration on the structure of the adamantyl cage. Comparison of Ama+ with aliphatic and aromatic primary amine radical cations reveals differences in the acidity of the NH2 group and the resulting interaction with W caused by substitution of the cycloalkyl cage.
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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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7
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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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8
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Shimizu T, Hashimoto K, Hada M, Miyazaki M, Fujii M. A theoretical study on the size-dependence of ground-state proton transfer in phenol-ammonia clusters. Phys Chem Chem Phys 2018; 20:3265-3276. [PMID: 29134211 DOI: 10.1039/c7cp05247b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Geometries and infrared (IR) spectra in the mid-IR region of phenol-(ammonia)n (PhOH-(NH3)n) (n = 0-10) clusters have been studied using density functional theory (DFT) to investigate the critical number of solvent molecules necessary to promote ground-state proton transfer (GSPT). For n ≤ 8 clusters, the most stable isomer is a non-proton-transferred (non-PT) structure, and all isomers found within 1.5 kcal mol-1 from it are also non-PT structures. For n = 9, the most stable isomer is also a non-PT structure; however, the second stable isomer is a PT structure, whose relative energy is within the experimental criterion of population (0.7 kcal mol-1). For n = 10, the PT structure is the most stable one. We can therefore estimate that the critical size of GSPT is n = 9. This is confirmed by the fact that these calculated IR spectra are in good accordance with our previous experimental results of mid-IR spectra. It is demonstrated that characteristic changes of the ν9a and ν12 bands in the skeletal vibrational region provide clear information that the GSPT reaction has occurred. It was also found that the shortest distance between the π-ring and the solvent moiety is a good indicator of the PT reaction.
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Affiliation(s)
- Toshihiko Shimizu
- Laboratory for Chemistry and Life Science, Institute for Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
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9
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Shimizu T, Miyazaki M, Fujii M. Theoretical Study on the Size Dependence of Ground-State Proton Transfer in 1-Naphthol–Ammonia Clusters. J Phys Chem A 2016; 120:7167-74. [DOI: 10.1021/acs.jpca.6b07079] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Toshihiko Shimizu
- Laboratory
for Chemistry
and Life Science, Institute for Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Mitsuhiko Miyazaki
- Laboratory
for Chemistry
and Life Science, Institute for Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Masaaki Fujii
- Laboratory
for Chemistry
and Life Science, Institute for Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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10
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11
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León I, Arnáiz PF, Usabiaga I, Fernández JA. Mass resolved IR spectroscopy of aniline–water aggregates. Phys Chem Chem Phys 2016; 18:27336-27341. [DOI: 10.1039/c6cp04373a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aniline is the simplest aromatic amine and therefore it is a prototypical system to study the microhydration and excited state dynamics of aromatic amines.
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Affiliation(s)
- I. León
- Department of Physical Chemistry
- Faculty of Science and Technology
- University of the Basque Country
- 48940 Leioa
- Spain
| | - P. F. Arnáiz
- Department of Physical Chemistry
- Faculty of Science and Technology
- University of the Basque Country
- 48940 Leioa
- Spain
| | - I. Usabiaga
- Department of Physical Chemistry
- Faculty of Science and Technology
- University of the Basque Country
- 48940 Leioa
- Spain
| | - J. A. Fernández
- Department of Physical Chemistry
- Faculty of Science and Technology
- University of the Basque Country
- 48940 Leioa
- Spain
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12
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Lu W, Wang HY, Wang M, Wang Y, Tao L, Qian W. Au nanoparticle decorated resin microspheres: synthesis and application in electrochemical cytosensors for sensitive and selective detection of lung cancer A549 cells. RSC Adv 2015. [DOI: 10.1039/c5ra00444f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
A novel cytosensor that can sensitively differentiate cancer cells from normal ones is prepared by using antibody-decorated resin microspheres.
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Affiliation(s)
- Wenbo Lu
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
| | - Hong-Yin Wang
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
| | - Man Wang
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
| | - Ying Wang
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
| | - Lin Tao
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
| | - Weiping Qian
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
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13
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Schmies M, Miyazaki M, Fujii M, Dopfer O. Microhydrated aromatic cluster cations: Binding motifs of 4-aminobenzonitrile-(H2O)n cluster cations with n ≤ 4. J Chem Phys 2014; 141:214301. [DOI: 10.1063/1.4901893] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Matthias Schmies
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
| | - Mitsuhiko Miyazaki
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Masaaki Fujii
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Otto Dopfer
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
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14
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Miyazaki M, Kawanishi A, Nielsen I, Alata I, Ishiuchi SI, Dedonder C, Jouvet C, Fujii M. Ground State Proton Transfer in Phenol–(NH3)n (n ≤ 11) Clusters Studied by Mid-IR Spectroscopy in 3–10 μm Range. J Phys Chem A 2013; 117:1522-30. [DOI: 10.1021/jp312074m] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Mitsuhiko Miyazaki
- Chemical Spectroscopy Division,
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259-R1-15, Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
| | - Ayako Kawanishi
- Chemical Spectroscopy Division,
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259-R1-15, Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
| | - Iben Nielsen
- Institut des Sciences Moléculaires
d’Orsay and Centre Laser de l’Université Paris
Sud, Université Paris-Sud 11, 91405
Orsay Cedex, France
| | - Ivan Alata
- Institut des Sciences Moléculaires
d’Orsay and Centre Laser de l’Université Paris
Sud, Université Paris-Sud 11, 91405
Orsay Cedex, France
| | - Shun-ichi Ishiuchi
- Chemical Spectroscopy Division,
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259-R1-15, Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
| | - Claude Dedonder
- Institut des Sciences Moléculaires
d’Orsay and Centre Laser de l’Université Paris
Sud, Université Paris-Sud 11, 91405
Orsay Cedex, France
- PIIM−UMR
CNRS 7345, Aix Marseille Université, Avenue Escadrille
Normandie-Niémen, 13397 Marseille Cedex 20, France
| | - Christophe Jouvet
- Institut des Sciences Moléculaires
d’Orsay and Centre Laser de l’Université Paris
Sud, Université Paris-Sud 11, 91405
Orsay Cedex, France
- PIIM−UMR
CNRS 7345, Aix Marseille Université, Avenue Escadrille
Normandie-Niémen, 13397 Marseille Cedex 20, France
| | - Masaaki Fujii
- Chemical Spectroscopy Division,
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259-R1-15, Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
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15
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Beck JP, Lisy JM. Infrared spectroscopy of hydrated alkali metal cations: Evidence of multiple photon absorption. J Chem Phys 2011; 135:044302. [DOI: 10.1063/1.3609760] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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16
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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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17
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Patzer A, Chakraborty S, Dopfer O. Infrared spectra and quantum chemical characterization of weakly bound clusters of the benzoyl cation with Ar and H2O. Phys Chem Chem Phys 2010; 12:15704-14. [DOI: 10.1039/c0cp00696c] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Plugatyr A, Svishchev IM. The hydration of aniline: Analysis of spatial distribution functions. J Chem Phys 2009; 130:114509. [DOI: 10.1063/1.3096672] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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19
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Hu Y, Bernstein ER. Photoionization and Vibrational Spectroscopy of the Aniline−Methanol Clusters. J Phys Chem A 2009; 113:639-43. [DOI: 10.1021/jp807049e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yongjun Hu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, People’s Republic of China, and Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
| | - Elliot R. Bernstein
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, People’s Republic of China, and Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
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20
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21
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Nam SH, Park HS, Lee MA, Cheong NR, Song JK, Park SM. Photoinduced evaporation of mass-selected aniline+(water)n (n=4-20) clusters. J Chem Phys 2007; 126:224302. [PMID: 17581049 DOI: 10.1063/1.2738945] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Photofragmentation of mass-selected aniline(+)(water)n (An(+)Wn, n=4-20) clusters is investigated over photon energies ranging from 1.65 to 4.66 eV by linear tandem time-of-flight mass spectrometry. The aniline ring turns out to survive irradiation of photons, and most of the absorbed photon energy flows to the hydrogen-bonding networks to be used up for liberation of water molecules. The average number of ejected water molecules measured as a function of photon energy reveals that the loss of water molecules is a photoevaporation process. The distributions of internal energies for parent ions and binding energies of water molecules are estimated from the plots of photofragment branching ratio versus photon energy, which give nice Gaussian fits. Also, density functional theory calculations are performed to obtain optimized structures of isomers for An(+)Wn clusters and binding energies. The authors find that the An(+)W6 cluster has a highly symmetric structure and its binding energy in An(+)W6-->An(+)W5+W stands out. This is in line with the experimental results showing that n=6 is a magic number in the mass distribution and An(+)W6 is relatively stable in metastable decay.
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Affiliation(s)
- Sang Hwan Nam
- Department of Chemistry, Kyunghee University, Seoul 130-701, Korea
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22
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Abstract
Beginning in the mid-1980s, a number of innovative experimental studies on ionic clusters emerged from the laboratory of Yuan T. Lee combining infrared laser spectroscopy and tandem mass spectrometry. Coupled with modern electronic structure calculations, this research explored many facets of ionic clusters including solvation, structure, and dynamics. These efforts spawned a resurgence in gas-phase cluster spectroscopy. This paper will focus on the major areas of research initiated by the Lee group and how these studies stimulated and influenced others in what is currently a vibrant and growing field.
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Affiliation(s)
- James M Lisy
- Department of Chemistry, University of Illinois, Urbana, Illinois 61801, USA.
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23
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Activationless nonradiative decay in rhodamines: Role of NH and lower frequency vibrations in solvent kinetic isotope effects. Chem Phys 2006. [DOI: 10.1016/j.chemphys.2005.08.069] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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24
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Lorenz U, Solcà N, Dopfer O. Entrance channel complexes of cationic aromatic SN2 reactions: IR spectra of fluorobenzene+–(H2O)n clusters. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.02.077] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Inokuchi Y, Ohshimo K, Misaizu F, Nishi N. Infrared Photodissociation Spectroscopy of [Mg·(H2O)1-4]+ and [Mg·(H2O)1-4·Ar]+. J Phys Chem A 2004. [DOI: 10.1021/jp0486752] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yoshiya Inokuchi
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan and Department of Chemistry, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Keijiro Ohshimo
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan and Department of Chemistry, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Fuminori Misaizu
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan and Department of Chemistry, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Nobuyuki Nishi
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan and Department of Chemistry, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
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Inokuchi Y, Ohshimo K, Misaizu F, Nishi N. Structures of [Mg·(H2O)1,2]+ and [Al·(H2O)1,2]+ ions studied by infrared photodissociation spectroscopy: evidence of [HO–Al–H]+ ion core structure in [Al·(H2O)2]+. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.03.148] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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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]
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