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Liu Y, Wang G, Zhao Y. Direct observation on argon tagging nitrobenzene radical anion in gas phase: Infrared photodissociation spectroscopy and theoretical calculation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 294:122482. [PMID: 36841135 DOI: 10.1016/j.saa.2023.122482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 01/26/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
The infrared photodissociation spectroscopy was applied to characterize nitrobenzene radical anion (NB-). NB- tagged by argon [NB(Ar)-] was prepared by a mixture of nitrobenzene/Ar through a supersonic ion source and then selected by a time-of-flight mass spectrometer. Eight strong peaks observed at 977.9, 999.6, 1059.8, 1275.7, 1309.7, 1339.7, 1367.6 and 1581.7 cm-1 in the fingerprint region were assigned to NB(Ar)-, corresponding to CC bending, CC stretching, CC bending + symmetric O-N stretching vibration, antisymmetric O-N and CC stretching vibration, antisymmetric O-N stretching and CH rocking vibration, CC stretching + antisymmetric O-N stretching vibration, C-N stretching vibration, and symmetric CC stretching vibration. Most interestingly, the distinguishable CH stretching vibrations were observed at 3006.5, 3048.6 and 3084.5 cm-1 absorptions. Combined with density functional theoretical (DFT) calculation, five tagging argon NB- isomers were optimized and analyzed with no imaginary frequency. The results indicated that most bond lengths in NB- become longer than those of neutral NB, except for the C1-C2/C4-C5 bonds, which are only slightly shorter than those of neutral NB, and the C-N bond, which is 0.085 A shorter in the anion. The NB- tagged by argon located on the nitro group had no change on bond parameters with Ar-tagging or not theoretically. Natural population analysis (NPA) show that the negative natural charges are mainly distributed on both oxygen atoms. And the one electron resonates between the nitro group and benzene ring. N-O bonds in NB- become much more polar than those of the neutral NB. This paper proved the usefulness to characterize NB(Ar)- and further explore the structures of NBn- (n > 1) clusters by infrared photodissociation spectroscopy combining with the time-of-flight mass spectrometer.
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Affiliation(s)
- Yanhui Liu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Guanjun Wang
- Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China.
| | - Yanying Zhao
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China; Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China.
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Hasanzade Z, Raissi H. Molecular mechanism for the encapsulation of the doxorubicin in the cucurbit[n]urils cavity and the effects of diameter, protonation on loading and releasing of the anticancer drug:Mixed quantum mechanical/ molecular dynamics simulations. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2020; 196:105563. [PMID: 32531653 DOI: 10.1016/j.cmpb.2020.105563] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/06/2020] [Accepted: 05/20/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND AND OBJECTIVES Doxorubicin is a common apoptotic chemotherapeutic which has shown an obvious inhibitory effect in cancer chemotherapy. Here, cucurbit[n]urils (n = 7,10) have been proposed as a doxorubicin carrier, and the effects of diameter, protonation on loading and releasing of the anticancer drug doxorubicin has been studied. METHODS The Density Functional Theory (DFT) calculation and Molecular Dynamics (MD) simulation are performed to study the adsorption process of the (guest) Doxorubicin molecule in the neutral and protonated states within the (host) cucurbit[n]urils (n = 7,10). RESULTS DFT results show that the adsorption process in water is thermodynamically favorable. It is found that the binding energies for protonated drug encapsulation in cucurbit[n]urils are weaker than those of the neutral drug, implying the protonation of doxorubicin can promote the drug release from the adsorption situation. The electron density values and their Laplacian are evaluated to identify the nature of the intermolecular interactions through the topological parameters using the Bader's theory of atoms in molecules. Furthermore, the natural bond orbital analysis shows that the electrons aretransferred from cucurbit[n]urils to drug in all complexes. MD simulation results indicate that value of drug diffusion coefficient is small, therefore, we expect DOX to be slowly released from the CB cavity. CONCLUSIONS Based on obtained results, cucurbit[n]urils may be a prominent nano-carrier to loading and release drug on to target cells.
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Affiliation(s)
| | - Heidar Raissi
- Chemistry Department, University of Birjand, Birjand, Iran.
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Katada M, Fujii A. Infrared Spectroscopy of Protonated Phenol–Water Clusters. J Phys Chem A 2018; 122:5822-5831. [DOI: 10.1021/acs.jpca.8b04446] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Marusu Katada
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Asuka Fujii
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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Rungnim C, Chanajaree R, Rungrotmongkol T, Hannongbua S, Kungwan N, Wolschann P, Karpfen A, Parasuk V. How strong is the edge effect in the adsorption of anticancer drugs on a graphene cluster? J Mol Model 2016; 22:85. [DOI: 10.1007/s00894-016-2937-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 02/22/2016] [Indexed: 10/22/2022]
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Affiliation(s)
- Joshua A. Long
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Blake M. Rankin
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Dor Ben-Amotz
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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Féraud G, Esteves-López N, Dedonder-Lardeux C, Jouvet C. UV spectroscopy of cold ions as a probe of the protonation site. Phys Chem Chem Phys 2015; 17:25755-60. [DOI: 10.1039/c5cp01122a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Where does the proton go?
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Affiliation(s)
- Géraldine Féraud
- CNRS, Aix Marseille Université
- PIIM
- Physique des Interactions Ioniques et Moléculaires (UMR-7345)
- 13397 Marseille Cedex 20
- France
| | - Natalia Esteves-López
- CNRS, Aix Marseille Université
- PIIM
- Physique des Interactions Ioniques et Moléculaires (UMR-7345)
- 13397 Marseille Cedex 20
- France
| | - Claude Dedonder-Lardeux
- CNRS, Aix Marseille Université
- PIIM
- Physique des Interactions Ioniques et Moléculaires (UMR-7345)
- 13397 Marseille Cedex 20
- France
| | - Christophe Jouvet
- CNRS, Aix Marseille Université
- PIIM
- Physique des Interactions Ioniques et Moléculaires (UMR-7345)
- 13397 Marseille Cedex 20
- France
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Sahu N, Yeole SD, Gadre SR. Appraisal of molecular tailoring approach for large clusters. J Chem Phys 2013; 138:104101. [PMID: 23514459 DOI: 10.1063/1.4793706] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
High level ab initio investigations on molecular clusters are generally restricted to those of small size essentially due to the nonlinear scaling of corresponding computational cost. Molecular tailoring approach (MTA) is a fragmentation-based method, which offers an economical and efficient route for studying larger clusters. However, due to its approximate nature, the MTA-energies carry some errors vis-à-vis their full calculation counterparts. These errors in the MTA-energies are reduced by grafting the correction at a lower basis set (e.g., 6-31+G(d)) onto a higher basis set (e.g., aug-cc-pvdz or aug-cc-pvtz) calculation at MP2 level of theory. Further, better estimates of energies are obtained by making use of many-body interaction analysis. For this purpose, R-goodness (Rg) parameters for the three- and four-body interactions in a fragmentation scheme are proposed. The procedure employing grafting and many-body analysis has been tested out on molecular clusters of water, benzene, acetylene and carbon dioxide. It is found that for the fragmentation scheme having higher three- and four-body Rg-values, the errors in MTA-grafted energies are reduced typically to ~0.2 mH at MP2 level calculation. Coupled with the advantage in terms of computational resources and CPU time, the present method opens a possibility of accurate treatment of large molecular clusters.
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Gloaguen E, Loquais Y, Thomas JA, Pratt DW, Mons M. Spontaneous Formation of Hydrophobic Domains in Isolated Peptides. J Phys Chem B 2013; 117:4945-55. [DOI: 10.1021/jp401499x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eric Gloaguen
- Laboratoire Francis Perrin, CNRS, INP & INC, URA 2453, F-91191 Gif-sur-Yvette, France
- Laboratoire Francis
Perrin, CEA, IRAMIS, URA 2453, F-91191
Gif-sur-Yvette, France
| | - Yohan Loquais
- Laboratoire Francis Perrin, CNRS, INP & INC, URA 2453, F-91191 Gif-sur-Yvette, France
- Laboratoire Francis
Perrin, CEA, IRAMIS, URA 2453, F-91191
Gif-sur-Yvette, France
| | - Jessica A. Thomas
- Department
of Biology and Chemistry, Purdue University North Central, Westville, Indiana
46391, United States
| | - David W. Pratt
- Department
of Chemistry, University of Vermont, Burlington,
Vermont 05405, United
States
| | - Michel Mons
- Laboratoire Francis Perrin, CNRS, INP & INC, URA 2453, F-91191 Gif-sur-Yvette, France
- Laboratoire Francis
Perrin, CEA, IRAMIS, URA 2453, F-91191
Gif-sur-Yvette, France
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Affiliation(s)
- Michael A. Duncan
- Department
of Chemistry, University of Georgia, Athens, Georgia 30602, United
States
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Cheng TC, Bandyopadhyay B, Mosley JD, Duncan MA. IR Spectroscopy of Protonation in Benzene–Water Nanoclusters: Hydronium, Zundel, and Eigen at a Hydrophobic Interface. J Am Chem Soc 2012; 134:13046-55. [DOI: 10.1021/ja3038245] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Timothy C. Cheng
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | | | - Jonathan D. Mosley
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Michael A. Duncan
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
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