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Canale V, Robinson R, Zavras A, Khairallah GN, d'Alessandro N, Yates BF, O'Hair RAJ. Two Spin-State Reactivity in the Activation and Cleavage of CO2 by [ReO2](.). J Phys Chem Lett 2016; 7:1934-1938. [PMID: 27193088 DOI: 10.1021/acs.jpclett.6b00754] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The rhenium dioxide anion [ReO2](-) reacts with carbon dioxide in a linear ion trap mass spectrometer to produce [ReO3](-) corresponding to activation and cleavage of a C-O bond. Isotope labeling experiments using [Re(18)O2](-) reveal that (18)O/(16)O scrambling does not occur prior to cleavage of the C-O bond. Density functional theory calculations were performed to examine the mechanism for this oxygen atom abstraction reaction. Because the spins of the ground states are different for the reactant and product ions ((3)[ReO2](-) versus (1)[ReO3](-)), both reaction surfaces were examined in detail and multiple [O2Re-CO2](-) intermediates and transition structures were located and minimum energy crossing points were calculated. The computational results show that the intermediate [O2Re(η(2)-C,O-CO2)](-) species most likely initiates C-O bond activation and cleavage. The stronger binding affinity of CO2 within this species and the greater instabilities of other [O2Re-CO2)](-) intermediates are significant enough that oxygen atom exchange is avoided.
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Affiliation(s)
- Valentino Canale
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne , 30 Flemington Road, Parkville, Victoria 3010, Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, University of Melbourne , Parkville, Victoria 3010, Australia
- Department of Engineering and Geology (INGEO), "G. d'Annunzio" University of Chieti and Pescara , Viale Pindaro, 42, I-65127 Pescara, Italy
| | - Robert Robinson
- School of Physical Sciences - Chemistry, University of Tasmania , Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Athanasios Zavras
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne , 30 Flemington Road, Parkville, Victoria 3010, Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, University of Melbourne , Parkville, Victoria 3010, Australia
| | - George N Khairallah
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne , 30 Flemington Road, Parkville, Victoria 3010, Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, University of Melbourne , Parkville, Victoria 3010, Australia
| | - Nicola d'Alessandro
- Department of Engineering and Geology (INGEO), "G. d'Annunzio" University of Chieti and Pescara , Viale Pindaro, 42, I-65127 Pescara, Italy
| | - Brian F Yates
- School of Physical Sciences - Chemistry, University of Tasmania , Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Richard A J O'Hair
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne , 30 Flemington Road, Parkville, Victoria 3010, Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, University of Melbourne , Parkville, Victoria 3010, Australia
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Siddiqui SA. In silico investigation of PdCln (n = 1–7) complexes: A study towards the design of new superhalogens and consequential possibility of formation of new salt species. MAIN GROUP CHEMISTRY 2015. [DOI: 10.3233/mgc-140160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Shamoon Ahmad Siddiqui
- Promising Centre for Sensors and Electronic Devices, Najran University, Najran, Kingdom of Saudi Arabia
- Advanced Materials and Nano Research Centre, Najran University, Najran, Kingdom of Saudi Arabia
- Department of Physics, College of Arts and Science, Najran University, Najran, Kingdom of Saudi Arabia
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O'Hair RAJ, Canale V, Zavras A, Khairallah GN, d'Alessandro N. Gas-phase reactions of the rhenium oxide anions, [ReOx]- (x = 2 - 4) with the neutral organic substrates methane, ethene, methanol and acetic acid. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2015; 21:557-568. [PMID: 26307735 DOI: 10.1255/ejms.1332] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The ion-molecule reactions of the rhenium oxide anions, [ReOx](-) (x = 2 - 4) with the organic substrates methane, ethene, methanol and acetic acid have been examined in a linear ion trap mass spectrometer. The only reactivity observed was between [ReO(2)](-) and acetic acid. Isotope labelled experiments and high-resolution mass spectrometry measurements were used to assign the formulas of the ionic products. Collision-induced dissociation and ion-molecule reactions with acetic acid were used to probe the structures of the mass-selected primary product ions. Density functional theory calculations [PBE0/LanL2DZ6-311+G(d)] were used to suggest possible structures. The three primary product channels observed are likely to arise from the formation of: the metallalactone [ReO(2)(CH(2)CO(2))](-) (m/z 277) and H(2); [CH(3)ReO(2)(OH)](-) (m/z 251) and CO; and [ReO(3)](-) (m/z 235), H(2) and CH(2)CO.
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Affiliation(s)
- Richard A J O'Hair
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3010, Australia. ARC Centre of Excellence for Free Radical Chemistry and Biotechnology.
| | - Valentino Canale
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3010, Australia. ARC Centre of Excellence for Free Radical Chemistry and Biotechnology. Department of Engineering and Geology (INGEO), "G. d'Annunzio" University of Chieti and Pescara, Viale Pindaro, 42, I- 65127 Pescara, Italy.
| | - Athanasios Zavras
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3010, Australia. ARC Centre of Excellence for Free Radical Chemistry and Biotechnology.
| | - George N Khairallah
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3010, Australia. ARC Centre of Excellence for Free Radical Chemistry and Biotechnology.
| | - Nicola d'Alessandro
- Department of Engineering and Geology (INGEO), "G. d'Annunzio" University of Chieti and Pescara, Viale Pindaro, 42, I- 65127 Pescara, Italy.
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Zhou Q, Gong WC, Xie L, Zheng CG, Zhang W, Wang B, Zhang YF, Huang X. Theoretical studies on the electronic structures and photoelectron spectra of tri-rhenium oxide clusters: Re3O(n)(-) and Re3O(n) (n=1-6). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 117:651-657. [PMID: 24121651 DOI: 10.1016/j.saa.2013.09.059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 09/16/2013] [Accepted: 09/17/2013] [Indexed: 06/02/2023]
Abstract
Density functional theory (DFT) calculations are performed to study the structural and electronic properties of tri-rhenium oxide clusters Re3On(-/0) (n=1-6). Generalized Koopmans' theorem is applied to predict the vertical detachment energies (VDEs) and simulate the photoelectron spectra (PES). Theoretical calculations at the B3LYP level are carried out to search for the global minima for both the anions and the neutrals. For the anions, the first two O atoms prefer the same corner position of a Re3 triangle. Whereas, Re3O3(-) possesses a C2v symmetry with one bridging and two terminal O atoms. The next three O atoms (n=4-6) are adding sequentially on the basis of Re3O3(-) motif, i.e., adding one terminal O atom for Re3O4(-), one terminal and one bridging O atoms for Re3O5(-), and one terminal and two bridging O atoms for Re3O6(-), respectively. Their corresponding neutral species are similar to the anions in geometry except Re3O4 and Re3O5. Molecular orbital analyses are employed to investigate the chemical bonding and structural evolution in these tri-rhenium oxide clusters.
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Affiliation(s)
- Qi Zhou
- Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, PR China
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RAMALHO TEODORICOC, DA CUNHA ELAINEFF, DE ALENCASTRO RICARDOBICCA. THEORETICAL STUDY OF ADIABATIC AND VERTICAL ELECTRON AFFINITY OF RADIOSENSITIZERS IN SOLUTION PART 2: ANALOGUES OF TIRAPAZAMINE. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633604000866] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Tirapazamine is a radiosensitizer, whose biological activity is associated to its electron affinity (EA). The electron affinity can be divided in two main processes: Vertical and Adiabatic. In this work, we calculated the EAs of nitroimidazoles (Fig. 2) using HF and DFT methods and evaluated solvent effects (water and carbon tetrachloride) on EAs. For water, we combined the Polarized Continuum Model (PCM) and free energy perturbation (Finite Difference Thermodynamic Integration, FDTI) methods. For carbon tetrachloride, we used the FDTI method. The values of adiabatic EA obtained are in agreement with experimental data (deviations of 13.25 meV). The vertical EA were calculated according to Cederbaum's Outer Valence Green Function (OVGF) method. This study, which relays on theoretical aspects of free energy calculations on charged molecules in solution, could be helpful in the rational design of new and more selective bioreductive anticancer drugs.
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Affiliation(s)
- TEODORICO C. RAMALHO
- Departamento de Química, Instituto Militar de Engenharia, Praça General Tibúrcio 80, 22290-270 Rio de Janeiro, Brazil
| | - ELAINE F. F. DA CUNHA
- Grupo de Fisico-Quimica Organica, Departmento de Quimica Organica, Instituto de Quimica, Universidade Federal do Rio de Janeiro, Ilha do Funduo, CT, B1A, Lab 609-21949-900 Rio de Janeiro, Brazil
| | - RICARDO BICCA DE ALENCASTRO
- Grupo de Fisico-Quimica Organica, Departmento de Quimica Organica, Instituto de Quimica, Universidade Federal do Rio de Janeiro, Ilha do Funduo, CT, B1A, Lab 609-21949-900 Rio de Janeiro, Brazil
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Gong Y, Zhou M, Andrews L. Spectroscopic and Theoretical Studies of Transition Metal Oxides and Dioxygen Complexes. Chem Rev 2009; 109:6765-808. [DOI: 10.1021/cr900185x] [Citation(s) in RCA: 324] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yu Gong
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China
| | - Mingfei Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China
| | - Lester Andrews
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22901
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Lee EPF, Dyke JM, Mok DKW, Chow WK, Chau FT. Ab initio calculations on low-lying electronic states of SnCl2−and Franck–Condon simulation of its photodetachment spectrum. Phys Chem Chem Phys 2008; 10:834-43. [DOI: 10.1039/b715595f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ramalho TC, de Alencastro RB, La-Scalea MA, Figueroa-Villar JD. Theoretical evaluation of adiabatic and vertical electron affinity of some radiosensitizers in solution using FEP, ab initio and DFT methods. Biophys Chem 2005; 110:267-79. [PMID: 15228963 DOI: 10.1016/j.bpc.2004.03.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2003] [Revised: 12/29/2003] [Accepted: 03/03/2004] [Indexed: 11/20/2022]
Abstract
The biological activity of radiosensitizers is associated to their electron affinity (EA), which can be divided in two main processes: vertical and adiabatic. In this work, we calculated the EAs of nitrofurans and nitroimidazoles (Fig. 2) using Hartree-Fock (HF) and density functional theory (DFT) methods and evaluated solvent effects (water and carbon tetrachloride) on EAs. For water, we combined the polarized continuum model (PCM) and free energy perturbation (FEP) (finite difference thermodynamic integration, FDTI) methods. For carbon tetrachloride, we used the FDTI method. The values of adiabatic EA obtained are in agreement with experimental data (deviations of 0.013 eV). The vertical EAs were calculated according to Cederbaum's outer valence Green function (OVGF) method. This methodology, which relies on theoretical aspects of free energy calculations on charged molecules in solution, was used to select potential selective radiosensitizers from recently reported compounds and could be helpful in the rational design of new and more selective bioreductive anticancer drugs.
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Affiliation(s)
- Teodorico C Ramalho
- Departamento de Química, Instituto Militar de Engenharia, Praça General Tibúrcio 80, 22290-270 Rio de Janeiro-RJ, Brazil
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Pramann A, Koyasu K, Nakajima A, Kaya K. Photoelectron Spectroscopy of Cobalt Oxide Cluster Anions. J Phys Chem A 2002. [DOI: 10.1021/jp020247d] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Axel Pramann
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kiichirou Koyasu
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Atsushi Nakajima
- Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Koji Kaya
- Institute of Molecular Science, Myodaiji, Okazaki 444-8585, Japan
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Pramann A, Koyasu K, Nakajima A, Kaya K. Anion photoelectron spectroscopy of VnOm− (n=4–15;m=0–2). J Chem Phys 2002. [DOI: 10.1063/1.1461824] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pramann A, Rademann K. Size dependent evolution of the electronic structure of small rhenium clusters investigated by photoelectron spectroscopy: approaching the bulk. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)01026-0] [Citation(s) in RCA: 5] [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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