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Esfandiarpour R, Badalkhani-Khamseh F, Hadipour NL. Theoretical studies of phosphorene as a drug delivery nanocarrier for fluorouracil. RSC Adv 2023; 13:18058-18069. [PMID: 37323453 PMCID: PMC10267674 DOI: 10.1039/d3ra00007a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 05/29/2023] [Indexed: 06/17/2023] Open
Abstract
The interactions between phosphorene nanosheets (PNSs) and 5-fluorouracil (FLU) were explored using the density functional theory (DFT) method and molecular dynamics (MD) simulations. DFT calculations were performed utilizing M06-2X functional and the 6-31G(d,p) basis set in both gas and solvent phases. Results showed that the FLU molecule is adsorbed horizontally on the PNS surface with an adsorption energy (Eads) of -18.64 kcal mol-1. The energy gap (Eg) between the highest occupied and lowest unoccupied molecular orbitals (HOMO and LUMO, respectively) of PNS remains constant after the adsorption process. The adsorption behavior of PNS is not affected by carbon and nitrogen doping. The dynamical behavior of PNS-FLU was studied at T = 298, 310, and 326 K reminiscent of room temperature, body temperature, and temperature of the tumor after exposure to 808 nm laser radiation, respectively. The D value decreases significantly after the equilibration of all systems so that the equilibrated value of D is about 1.1 × 10-6, 4.0 × 10-8, and 5.0 × 10-9 cm2 s-1 at T = 298, 310, and 326 K, respectively. About 60 FLU molecules can be adsorbed on both sides of each PNS, indicating its high loading capacity. PMF calculations demonstrated that the release of FLU from PNS is not spontaneous, which is favorable from a sustained drug delivery point of view.
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Affiliation(s)
- Razieh Esfandiarpour
- Department of Physical Chemistry, Faculty of Sciences, Tarbiat Modares University Tehran Iran
| | | | - Nasser L Hadipour
- Department of Physical Chemistry, Faculty of Sciences, Tarbiat Modares University Tehran Iran
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2
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Ahmed AA. Structural and electronic properties of the adsorption of nitric oxide molecule on copper clusters CuN(N = 1–7): A DFT study. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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4
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Wang C, Yang Y, Liu X, Li Y, Song D, Tian Y, Zhang Z, Shen X. Dissociative chemisorption of O2 on Agn and Agn−1Ir (n = 3–26) clusters: a first-principle study. Phys Chem Chem Phys 2020; 22:9053-9066. [DOI: 10.1039/d0cp01005g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lower dissociation barriers and higher reaction rates of O2 on doped Agn−1Ir clusters, and a gradually weakened dopant effect.
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Affiliation(s)
- Chuangchuang Wang
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Yongpeng Yang
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Xiaojing Liu
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Yuanjie Li
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Dandan Song
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Yun Tian
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Zhaojun Zhang
- State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical Computational Chemistry
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- People's Republic of China
| | - Xiangjian Shen
- Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education
- Zhengzhou University
- Zhengzhou 450001
- China
- State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical Computational Chemistry
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5
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Pino-Rios R, Inostroza D, Cárdenas-Jirón G, Tiznado W. Orbital-Weighted Dual Descriptor for the Study of Local Reactivity of Systems with (Quasi-) Degenerate States. J Phys Chem A 2019; 123:10556-10562. [PMID: 31710492 DOI: 10.1021/acs.jpca.9b07516] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An alternative response function, based on the dual descriptor in terms of Koopmans' approximation, is hereby proposed for the description of chemical reactivity in systems with (quasi-) degenerate frontier molecular orbitals. This descriptor is constructed from Fukui functions that include contributions from different orbitals, i.e., orbital-weighted Fukui functions. The methodology is applied to three case studies: the first case consists of a series of benchmark organic and inorganic molecules from which the dual descriptor, based only on frontier orbitals, is not appropriate to describe their reactivity. The second case deals with the proper description of chemical reactivity in Diels-Alder reactions between fullerene C60 and cyclopentadiene (CP), revealing the importance of considering secondary orbital interactions for an adequate regioselectivity description. The third, and last case, consists of a series of polycyclic aromatic hydrocarbons (PAHs) possessing molecular orbital degeneracy. By means of analyzing of this descriptor, an alternative approach to the description of aromaticity is proposed. In all cases, the proposed index called "orbital-weighted dual descriptor" has proven to accurately describe the chemical reactivity and aromaticity of the studied systems.
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Affiliation(s)
- Ricardo Pino-Rios
- Laboratorio de Quı́mica Teórica, Facultad de Quı́mica y Biologı́a , Universidad de Santiago de Chile (USACH) Av. Libertador Bernardo O'Higgins 3363 , Santiago , Estación Central, Región Metropolitana 9170022 , Chile
| | - Diego Inostroza
- Doctorado en Fisicoquı́mica Molecular. Facultad de Ciencias Exactas , Universidad Andres Bello (UNAB) , Av. República 275 , Santiago , Región Metropolitana 8370146 , Chile
| | - Gloria Cárdenas-Jirón
- Laboratorio de Quı́mica Teórica, Facultad de Quı́mica y Biologı́a , Universidad de Santiago de Chile (USACH) Av. Libertador Bernardo O'Higgins 3363 , Santiago , Estación Central, Región Metropolitana 9170022 , Chile
| | - William Tiznado
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Quı́micas, Facultad de Ciencias Exactas , Universidad Andres Bello , Av. República 498 , Santiago , Región Metropolitana 8370251 , Chile
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Wang H, Miyajima K, Kudoh S, Mafuné F. Effect of atomicity on the oxidation of cationic copper clusters studied using thermal desorption spectrometry. Phys Chem Chem Phys 2019; 21:23129-23135. [PMID: 31609369 DOI: 10.1039/c9cp03892b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The resistivity to oxidation of small copper clusters, Cun+ (n ≤ 5), in the gas phase with a precise atomicity at the molecular level was investigated using a combination of thermal desorption spectrometry and mass spectrometry. Oxide clusters, CunOm+, with more O atoms than those present with a stoichiometry of n : m = 1 : 1 were produced at room temperature in the presence of O2, and the weakly bound excess oxygen atoms involved in the clusters were removed by post heating. Non-oxidized Cu2+ and Cu3+ clusters were formed in the range of 323-923 K, whereas partially oxidized clusters, Cu4O2+ and Cu5O2+, were generated for n = 4 and 5. Considering the fact that CunOm+ (m = n/2 + 1) tends to be generated for n ≥ 6, the small copper clusters were concluded to be resistive to oxidation. The possible reaction paths for the oxidation of Cu2+ and Cu4+ clusters were obtained by density functional calculations, which were consistent with the experimental findings. The oxidation states of the Cu atoms in the clusters were discussed based on the natural charges of the atoms.
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Affiliation(s)
- Haohao Wang
- Department of Basic Science, School of Arts and Sciences, The University of Tokyo, Komaba, Meguro, Tokyo 153-8902, Japan.
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7
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Ma L, Akola J. Varying oxygen coverage on Cu 55 and its effect on CO oxidation. Phys Chem Chem Phys 2019; 21:11351-11358. [PMID: 31107472 DOI: 10.1039/c9cp00974d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Adsorption of molecular oxygen on a Cu55 cluster and the resulting oxidation effects have been investigated by spin-polarized density functional theory (DFT). The optimal structure for each Cu55O2N (N = 1-20) complex has been obtained via a sequential addition of O2 and systematic screening of the preferable adsorption sites. Upon structural optimization, several O2 molecules dissociate readily on Cu55 at different oxygen coverages, and further DFT molecular dynamics simulations at 300 K confirm the instability (small dissociation barrier) of the remaining O2 and a spontaneous movement of some oxygen atoms from the surface sites towards the cluster interior. The Cu55 cluster and its oxidized derivatives have been placed on a γ-Al2O3(100) surface to study the cluster-support interaction, and furthermore, CO oxidation reactions on both Cu55(O)2N and Cu55(O)2N/γ-Al2O3(100) have been studied as a function of oxygen coverage. The CO oxidation reaction barrier is rather insensitive to the oxygen coverage regardless of the support, indicating a small increase in activity with the number of surface oxygen atoms.
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Affiliation(s)
- Li Ma
- Computational Physics Laboratory, Tampere University, P.O. Box 692, FI-33014 Tampere, Finland
| | - Jaakko Akola
- Computational Physics Laboratory, Tampere University, P.O. Box 692, FI-33014 Tampere, Finland and Department of Physics, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
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8
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Lushchikova OV, Huitema DMM, López-Tarifa P, Visscher L, Jamshidi Z, Bakker JM. Structures of Cu n+ ( n = 3-10) Clusters Obtained by Infrared Action Spectroscopy. J Phys Chem Lett 2019; 10:2151-2155. [PMID: 30977666 PMCID: PMC6503464 DOI: 10.1021/acs.jpclett.9b00539] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 04/12/2019] [Indexed: 05/31/2023]
Abstract
Coinage metal clusters are of great importance for a wide range of scientific fields, ranging from microscopy to catalysis. Despite their clear fundamental and technological importance, the experimental structural determination of copper clusters has attracted little attention. We fill this gap by elucidating the structure of cationic copper clusters through infrared (IR) photodissociation spectroscopy of Cu n+-Ar m complexes. Structures of Cu n+ ( n = 3-10) are unambiguously assigned based on the comparison of experimental IR spectra in the 70-280 cm-1 spectral range with spectra calculated using density functional theory. Whereas Cu3+ and Cu4+ are planar, starting from n = 5, Cu n+ clusters adopt 3D structures. Each successive cluster size is composed of its predecessor with a single atom adsorbed onto the face, giving evidence of a stepwise growth.
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Affiliation(s)
- Olga V. Lushchikova
- Radboud University,
Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525 ED, Nijmegen, The Netherlands
| | - Douwe M. M. Huitema
- Radboud University,
Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525 ED, Nijmegen, The Netherlands
| | - Pablo López-Tarifa
- Division
of Theoretical
Chemistry, Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Lucas Visscher
- Division
of Theoretical
Chemistry, Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Zahra Jamshidi
- Division
of Theoretical
Chemistry, Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
- Chemistry
Department, Sharif University of Technology, Tehran 11155-9516, Iran
- Chemistry
& Chemical Engineering Research Center of Iran (CCERCI), P.O. Box 14968-13151, Tehran 14335-186, Iran
| | - Joost M. Bakker
- Radboud University,
Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525 ED, Nijmegen, The Netherlands
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9
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Zhao S, Ren Y, Yao K, Tian X, Wang J. Density functional study of ternary AuxAgyCuz and AuxAgyCuz+ clusters (x + y+z = 5, 6). Mol Phys 2018. [DOI: 10.1080/00268976.2018.1524158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Shuang Zhao
- School of Chemical Engineering and Pharmaceutical, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - YunLai Ren
- School of Chemical Engineering and Pharmaceutical, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - KaiSheng Yao
- School of Chemical Engineering and Pharmaceutical, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - XinZhe Tian
- School of Chemical Engineering and Pharmaceutical, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - JianJi Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, People’s Republic of China
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11
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12
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Parida SK, Sahu S. Theoretical analysis of CO interaction with second-row dicarbides C2X (X = Na-Cl). Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.06.007] [Citation(s) in RCA: 4] [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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13
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Yañez O, Vásquez-Espinal A, Inostroza D, Ruiz L, Pino-Rios R, Tiznado W. A Fukui function-guided genetic algorithm. Assessment on structural prediction of Sin(n = 12-20) clusters. J Comput Chem 2017; 38:1668-1677. [DOI: 10.1002/jcc.24810] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 03/29/2017] [Accepted: 03/30/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Osvaldo Yañez
- Doctorado en Fisicoquímica Molecular; Facultad de Ciencias Exactas, Universidad Andres Bello; República 275 Santiago Chile
- Departamento de Ciencias Químicas; Facultad de Ciencias Exactas Universidad Andres Bello; República 275 Santiago Chile
| | - Alejandro Vásquez-Espinal
- Doctorado en Fisicoquímica Molecular; Facultad de Ciencias Exactas, Universidad Andres Bello; República 275 Santiago Chile
- Departamento de Ciencias Químicas; Facultad de Ciencias Exactas Universidad Andres Bello; República 275 Santiago Chile
| | - Diego Inostroza
- Centro de Bioinformatica y Simulación Molecular; Facultad de Ingeniería, Universidad de Talca; 2 Norte 685, Casilla 721 Talca Chile
| | - Lina Ruiz
- Centro de Investigación Biomédica, Universidad Autónoma de Chile; Santiago Chile
| | - Ricardo Pino-Rios
- Doctorado en Fisicoquímica Molecular; Facultad de Ciencias Exactas, Universidad Andres Bello; República 275 Santiago Chile
- Departamento de Ciencias Químicas; Facultad de Ciencias Exactas Universidad Andres Bello; República 275 Santiago Chile
| | - William Tiznado
- Doctorado en Fisicoquímica Molecular; Facultad de Ciencias Exactas, Universidad Andres Bello; República 275 Santiago Chile
- Departamento de Ciencias Químicas; Facultad de Ciencias Exactas Universidad Andres Bello; República 275 Santiago Chile
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14
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Pino-Rios R, Yañez O, Inostroza D, Ruiz L, Cardenas C, Fuentealba P, Tiznado W. Proposal of a simple and effective local reactivity descriptor through a topological analysis of an orbital-weighted fukui function. J Comput Chem 2017; 38:481-488. [DOI: 10.1002/jcc.24699] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/28/2016] [Accepted: 11/18/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Ricardo Pino-Rios
- Doctorado en Fisicoquímica Molecular, Facultad de Ciencias Exactas, Universidad Andres Bello; República 275 Santiago Chile
- Departamento de Ciencias Químicas; Facultad de Ciencias Exactas Universidad Andres Bello; República 275 Santiago Chile
| | - Osvaldo Yañez
- Doctorado en Fisicoquímica Molecular, Facultad de Ciencias Exactas, Universidad Andres Bello; República 275 Santiago Chile
- Departamento de Ciencias Químicas; Facultad de Ciencias Exactas Universidad Andres Bello; República 275 Santiago Chile
| | - Diego Inostroza
- Centro de Bioinformática y Simulación Molecular, Facultad de Ingeniería, Universidad de Talca; 2 Norte 685, Casilla 721 Talca Chile
| | - Lina Ruiz
- Centro de Investigación Biomédica, Universidad Autónoma de Chile; Santiago Chile
| | - Carlos Cardenas
- Departamento de Física, Facultad de Ciencias; Universidad de Chile; 653-Santiago Chile
- Centro para el desarrollo de la Nanociencias y Nanotecnologia, CEDENNA; Av. Ecuador 3493 Santiago Chile
| | - Patricio Fuentealba
- Departamento de Física, Facultad de Ciencias; Universidad de Chile; 653-Santiago Chile
- Centro para el desarrollo de la Nanociencias y Nanotecnologia, CEDENNA; Av. Ecuador 3493 Santiago Chile
| | - William Tiznado
- Doctorado en Fisicoquímica Molecular, Facultad de Ciencias Exactas, Universidad Andres Bello; República 275 Santiago Chile
- Departamento de Ciencias Químicas; Facultad de Ciencias Exactas Universidad Andres Bello; República 275 Santiago Chile
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Affiliation(s)
- Zhixun Luo
- State
Key Laboratory for Structural Chemistry of Unstable and Stable Species,
Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - A. W. Castleman
- Departments
of Chemistry and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Shiv N. Khanna
- Department
of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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16
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Parida SK, Sahu S, Sharma S. Regioselectivity of third-row maingroup dicarbides, C2X (X = K-Br) for CO interaction: Fukui function and topological analyses. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.06.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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18
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Li J, Yu N, Geng H. Nanostructured copper/copper oxide hybrids: combined experimental and theoretical studies. Phys Chem Chem Phys 2016; 18:21562-72. [DOI: 10.1039/c6cp03096c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The inhomogeneous distribution of Al and Cu atoms in sintered precursors makes the released Cu atoms susceptible to oxidation during dealloying.
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Affiliation(s)
- Jie Li
- School of Materials Science and Engineering, University of Jinan
- Jinan 250022
- P. R. China
| | - Nana Yu
- School of Materials Science and Engineering, University of Jinan
- Jinan 250022
- P. R. China
| | - Haoran Geng
- School of Materials Science and Engineering, University of Jinan
- Jinan 250022
- P. R. China
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
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Posada-Pérez S, Viñes F, Rodríguez JA, Illas F. Structure and electronic properties of Cu nanoclusters supported on Mo2C(001) and MoC(001) surfaces. J Chem Phys 2015; 143:114704. [DOI: 10.1063/1.4930538] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Sergio Posada-Pérez
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1, 08028 Barcelona, Spain
| | - Francesc Viñes
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1, 08028 Barcelona, Spain
| | - José A. Rodríguez
- Chemistry Department, Brookhaven National Laboratory, Bldg. 555, Upton, New York 11973, USA
| | - Francesc Illas
- Departament de Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1, 08028 Barcelona, Spain
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Ma L, Melander M, Laasonen K, Akola J. CO oxidation catalyzed by neutral and anionic Cu20 clusters: relationship between charge and activity. Phys Chem Chem Phys 2015; 17:7067-76. [PMID: 25687378 DOI: 10.1039/c5cp00365b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactions of CO and O2 on neutral and anionic Cu20 clusters have been investigated by spin-polarized density functional theory. Three reaction mechanisms of CO oxidation are explored: reactions with atomic oxygen (dissociated O2) as well as reactions with molecular oxygen, including Langmuir-Hinshelwood (LH) and Eley-Rideal (ER) mechanisms. The adsorption energies, reaction pathways, and reaction barriers for CO oxidation are calculated systematically. The anionic Cu20(-) cluster can adsorb CO and O2 more strongly than the neutral counterpart due to the superatomic shell closing of 20 valence electrons which leaves one electron above the band gap. The activation of O2 molecule upon adsorption is crucial to determine the rate of CO oxidation. The CO oxidation proceeds efficiently on both Cu20 and Cu20(-) clusters, when O2 is pre-adsorbed dissociatively. The ER mechanism has a lower reaction barrier than the LH mechanism on the neutral Cu20. In general, CO oxidation occurs more readily on the anionic Cu20(-) (effective reaction barriers 0.1-0.3 eV) than on the neutral Cu20 cluster (0.3-0.5 eV). Moreover, Cu20(-) exhibits enhanced binding for CO2. From the analysis of the reverse direction of CO oxidation, it is observed that the transition of CO2 to CO + O can occur on the Cu20(-) cluster, which demonstrates that Cu clusters may serve as good catalyst for CO2 chemistry.
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Affiliation(s)
- Li Ma
- COMP Centre of Excellence, Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland.
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21
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Schmidt M, Masson A, Cheng HP, Bréchignac C. Physisorption and Chemisorption on Silver Clusters. Chemphyschem 2015; 16:855-65. [DOI: 10.1002/cphc.201402726] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Indexed: 11/06/2022]
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22
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Zapata-Escobar A, Manrique-Moreno M, Guerra D, Hadad CZ, Restrepo A. A combined experimental and computational study of the molecular interactions between anionic ibuprofen and water. J Chem Phys 2014; 140:184312. [DOI: 10.1063/1.4874258] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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23
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Structure and energetics of Li/Na, Li/K, and K/Na bimetallic hexamers. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2013. [DOI: 10.1007/s13738-013-0261-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Li SC, Li Y, Wu D, Li ZR. Density functional study of structural and electronic properties of small binary Be(n)Cu(m) (n + m = 2~7) clusters. J Mol Model 2013; 19:3065-75. [PMID: 23584555 DOI: 10.1007/s00894-013-1831-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Accepted: 03/19/2013] [Indexed: 11/29/2022]
Abstract
The geometrical structures, electronic properties and relative stabilities of small bimetallic Be n Cu m (n + m = 2-7) clusters have been systematically investigated by using a density functional method at the B3PW91 level. In the most stable structures of Be n Cu m , the Be atoms tend to gather together and construct similar configurations to those of pure Be n clusters. Meanwhile, there is a tendency for Cu atoms to segregate toward the Be n cluster surface. The successive binding energies, cohesive energies, second difference of energies, the highest occupied-lowest unoccupied molecular orbital energy gaps and chemical hardness of Be n Cu m are also investigated. All of them demonstrate that the clusters with even number of copper atoms present relatively higher stabilities. The natural population analyses on the Be n Cu m clusters reveal that, the charge transfers from Be to Cu when the average coordination numbers (Nc) of Be atom is less than 3, whereas the charge-transferring direction reverses when Nc(Be) increases.
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Affiliation(s)
- Si-Cheng Li
- Institute of Theoretical Chemistry, State Key Laboratory of Theoretical and Computational Chemistry, Jilin University, Changchun 130023, People's Republic of China
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25
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Gautam S, Dharamvir K, Goel N. CO2 adsorption and activation over medium sized Cun (n=7, 13 and 19) clusters: A density functional study. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2012.12.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Acelas NY, Mejia SM, Mondragón F, Flórez E. Density functional theory characterization of phosphate and sulfate adsorption on Fe-(hydr)oxide: Reactivity, pH effect, estimation of Gibbs free energies, and topological analysis of hydrogen bonds. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2012.11.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Why is quercetin a better antioxidant than taxifolin? Theoretical study of mechanisms involving activated forms. J Mol Model 2013; 19:2165-72. [PMID: 23283546 DOI: 10.1007/s00894-012-1732-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 12/12/2012] [Indexed: 10/27/2022]
Abstract
The stronger antioxidant capacity of the flavonoid quercetin (Q) compared with taxifolin (dihydroquercetin, T) has been the subject of previous experimental and theoretical studies. Theoretical work has focused on the analysis of hydrogen bond dissociation energies (BDE) of the OH phenolic groups, but consider mechanisms that only involve the transfer of one hydrogen atom. In the present work we consider other mechanisms involving a second hydrogen transfer in reactions with free radicals. The relative stability of the radicals formed after the first hydrogen transfer reaction is considered in discussing the antioxidant activity of Q and T. In terms of global and local theoretical reactivity descriptors, we propose that the radical arising from Q should be more persistent in the environment and with the capability to react with a second radical by hydrogen transfer, proton transfer and electron transfer mechanisms. These mechanisms could be responsible of the stronger antioxidant capacity of Q.
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28
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Acelas NY, López D, Mondragón F, Tiznado W, Flórez E. Topological analysis of tetraphosphorus oxides (P4O6+n (n = 0–4)). J Mol Model 2012; 19:2057-67. [DOI: 10.1007/s00894-012-1633-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 10/05/2012] [Indexed: 10/27/2022]
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29
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Luo Z, Smith JC, Woodward WH, Castleman AW. The Growth of Ionic Crystals Based on the Halogenation of Copper Cluster Anions. J Phys Chem A 2012; 116:2012-7. [DOI: 10.1021/jp211636r] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhixun Luo
- Department
of Chemistry and ‡Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802,
United States
| | - Jordan C. Smith
- Department
of Chemistry and ‡Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802,
United States
| | - W. Hunter Woodward
- Department
of Chemistry and ‡Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802,
United States
| | - A. W. Castleman
- Department
of Chemistry and ‡Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802,
United States
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30
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Osorio E, Ferraro MB, Oña OB, Cardenas C, Fuentealba P, Tiznado W. Assembling Small Silicon Clusters Using Criteria of Maximum Matching of the Fukui Functions. J Chem Theory Comput 2011; 7:3995-4001. [DOI: 10.1021/ct200643z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Edison Osorio
- Departamento de Química, Facultad de Ciencias Exactas, Universidad Andres Bello, Avenida República 252, Santiago de Chile
| | - Marta B. Ferraro
- Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, and IFIBA, CONICET, (1428) Ciudad Universitaria - Pab. I., Buenos Aires, Argentina
| | - Ofelia B. Oña
- Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, and IFIBA, CONICET, (1428) Ciudad Universitaria - Pab. I., Buenos Aires, Argentina
| | - Carlos Cardenas
- Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile and CEDENA
| | - Patricio Fuentealba
- Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile and CEDENA
| | - William Tiznado
- Departamento de Química, Facultad de Ciencias Exactas, Universidad Andres Bello, Avenida República 252, Santiago de Chile
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31
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Yuan X, Liu L, Wang X, Yang M, Jackson KA, Jellinek J. Theoretical Investigation of Adsorption of Molecular Oxygen on Small Copper Clusters. J Phys Chem A 2011; 115:8705-12. [DOI: 10.1021/jp200125t] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiuxiang Yuan
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
| | - Liuxia Liu
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
| | - Xin Wang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
| | - Mingli Yang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
| | - Koblar Alan Jackson
- Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, United States
| | - Julius Jellinek
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
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32
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Experimental and density functional studies on the corrosion behavior of the copper-nickel-tin alloy. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.04.100] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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33
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Allison TC, Tong YJ. Evaluation of methods to predict reactivity of gold nanoparticles. Phys Chem Chem Phys 2011; 13:12858-64. [DOI: 10.1039/c1cp20376b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Fuentealba P, Florez E, Tiznado W. Topological Analysis of the Fukui Function. J Chem Theory Comput 2010; 6:1470-8. [DOI: 10.1021/ct100022w] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Patricio Fuentealba
- Departamento de Física, Universidad de Chile, Las Palmeras 3425, Santiago-Chile, Instituto de Química, Universidad de Antioquia, A.A. 1226, Medellín, Colombia, and Departamento de Ciencias Químicas, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, Av. República 275, Santiago-Chile
| | - Elizabeth Florez
- Departamento de Física, Universidad de Chile, Las Palmeras 3425, Santiago-Chile, Instituto de Química, Universidad de Antioquia, A.A. 1226, Medellín, Colombia, and Departamento de Ciencias Químicas, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, Av. República 275, Santiago-Chile
| | - William Tiznado
- Departamento de Física, Universidad de Chile, Las Palmeras 3425, Santiago-Chile, Instituto de Química, Universidad de Antioquia, A.A. 1226, Medellín, Colombia, and Departamento de Ciencias Químicas, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, Av. República 275, Santiago-Chile
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35
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Chen L, Zhang Q, Zhang Y, Li WZ, Han B, Zhou C, Wu J, Forrey RC, Garg D, Cheng H. A first principles study of water dissociation on small copper clusters. Phys Chem Chem Phys 2010; 12:9845-51. [DOI: 10.1039/c001006e] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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36
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Mozaffarieh M, Grieshaber M, Orgül S, Flammer J. The Potential Value of Natural Antioxidative Treatment in Glaucoma. Surv Ophthalmol 2008; 53:479-505. [DOI: 10.1016/j.survophthal.2008.06.006] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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37
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Pérez JF, Florez E, Hadad CZ, Fuentealba P, Restrepo A. Stochastic Search of the Quantum Conformational Space of Small Lithium and Bimetallic Lithium−Sodium Clusters. J Phys Chem A 2008; 112:5749-55. [DOI: 10.1021/jp802176w] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jhon F. Pérez
- Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Grupo de Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago 1, Chile
| | - Elizabeth Florez
- Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Grupo de Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago 1, Chile
| | - Cacier Z. Hadad
- Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Grupo de Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago 1, Chile
| | - Patricio Fuentealba
- Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Grupo de Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago 1, Chile
| | - Albeiro Restrepo
- Grupo de Química-Física Teórica, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Grupo de Química de Recursos Energéticos y Medio Ambiente, Instituto de Química, Universidad de Antioquia, AA 1226 Medellín, Colombia, Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago 1, Chile
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38
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39
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40
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Stiles PL, Miller RE. Structures and Bonding Nature of Small Monoligated Copper Clusters (HCN−Cun, n = 1−3) through High-Resolution Infrared Spectroscopy and Theory. J Phys Chem A 2006; 110:10225-35. [PMID: 16928112 DOI: 10.1021/jp063187a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The structures, C-H stretching frequencies, and dipole moments of HCN-Cun (n = 1-3) clusters are determined through high-resolution infrared spectroscopy. The complexes are formed and probed within superfluid helium droplets, whereby the helium droplet beam is passed over a resistively heated crucible containing copper shot and then through a gas HCN pickup cell. All complexes are found to be bound to the nitrogen end of the HCN molecule and on the "atop site" of the copper cluster. Through the experimental C-H vibrational shifts of HCN-Cun and ab initio calculations, it was found that the HCN-metal interaction changes from a strong van der Waals bond in n = 1 to a partially covalent bond in HCN-Cu3. Comparisons with existing infrared data on copper surfaces show that the HCN-Cun bond must begin to weaken at very large copper cluster sizes, eventually returning to a van der Waals bond in the bulk copper surface case.
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Affiliation(s)
- Paul L Stiles
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599
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41
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Florez E, Mondragón F, Fuentealba P. Effect of Ni and Pd on the Geometry, Electronic Properties, and Active Sites of Copper Clusters. J Phys Chem B 2006; 110:13793-8. [PMID: 16836325 DOI: 10.1021/jp060521u] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The geometry, electronic properties, and active sites of copper clusters doped with Ni or Pd atoms, Cu(n)()(-)(1)M (n = 2-6; M = Ni, Pd) have been investigated using first-principles methods. Planar structures are energetically favorable in Cu(n)()(-)(1)Ni (n = 2-6). However, for Pd-doped clusters, three-dimensional structures are competitive in energy, and for n = 6, the most stable structure is not planar. Several properties of doped copper clusters present odd-even oscillations as the number of copper atoms grow. The different atomic ground-state configuration of Ni and Pd determines the bonding and electronic properties of doped copper clusters. The interaction between impurities and copper atoms can modify the chemical hardness and active sites of doped copper clusters markedly inducing directionality in the reactivity. This effect is relevant to the behavior of catalysts as well as in the growth of metallic films.
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Affiliation(s)
- Elizabeth Florez
- Institute of Chemistry, University of Antioquia, A.A. 1226, Medellín, Colombia
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42
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Poater A, Duran M, Jaque P, Toro-Labbé A, Solà M. Molecular Structure and Bonding of Copper Cluster Monocarbonyls CunCO (n = 1−9). J Phys Chem B 2006; 110:6526-36. [PMID: 16570950 DOI: 10.1021/jp054690a] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this work we analyze CO binding on small neutral copper clusters, Cun (n = 1-9). Molecular structures and reactivity descriptors of copper clusters are computed and discussed. The results show that the condensed Fukui functions and the frontier molecular orbital theory are useful tools to predict the selectivity of CO adsorption on these small clusters. To get further insight into the CO binding to copper clusters, an energy decomposition analysis of the CO binding energy is performed. The Cs symmetry of the formed CunCO clusters (n = 1-8) allows the separation between the orbital interaction terms corresponding to donation and back-donation. It is found that, energetically, the donation is twice as important as back-donation.
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Affiliation(s)
- Albert Poater
- Institut de Química Computacional and Departament de Química, Universitat de Girona, E-17071 Girona, Catalonia, Spain
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