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Safari P, Gückel S, Gluyas JBG, Moggach SA, Kaupp M, Low PJ. The Use of Bridging Ligand Substituents to Bias the Population of Localized and Delocalized Mixed‐Valence Conformers in Solution. Chemistry 2022; 28:e202200926. [PMID: 35642131 PMCID: PMC9401031 DOI: 10.1002/chem.202200926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Parvin Safari
- School of Molecular Sciences University of Western Australia 35 Stirling Highway Crawley, WA 6009 Australia
| | - Simon Gückel
- Institut für Chemie Theoretische Chemie/Quantenchemie Sekr. C7 Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Josef B. G. Gluyas
- School of Molecular Sciences University of Western Australia 35 Stirling Highway Crawley, WA 6009 Australia
| | - Stephen A. Moggach
- School of Molecular Sciences University of Western Australia 35 Stirling Highway Crawley, WA 6009 Australia
| | - Martin Kaupp
- Institut für Chemie Theoretische Chemie/Quantenchemie Sekr. C7 Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Paul J. Low
- School of Molecular Sciences University of Western Australia 35 Stirling Highway Crawley, WA 6009 Australia
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Gückel S, Safari P, Bagher Hosseini Ghazvini SM, Hall MR, Gluyas JBG, Kaupp M, Low PJ. Iron Versus Ruthenium: Evidence for the Distinct Differences in the Electronic Structures of Hexa-1,3,5-triyn-1,6-diyl-bridged Complexes [Cp*(dppe)M}{μ-(C≡C)3}{M(dppe)Cp*}]+ (M = Fe, Ru). Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00681] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Simon Gückel
- Institut für Chemie, Technische Universität Berlin, Sekr. C7, Strasse des 17 Juni 135, 10623 Berlin, Germany
| | - Parvin Safari
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Perth, Western Australia 6009, Australia
| | | | - Michael R. Hall
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Perth, Western Australia 6009, Australia
| | - Josef B. G. Gluyas
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Perth, Western Australia 6009, Australia
| | - Martin Kaupp
- Institut für Chemie, Technische Universität Berlin, Sekr. C7, Strasse des 17 Juni 135, 10623 Berlin, Germany
| | - Paul J. Low
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Perth, Western Australia 6009, Australia
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Safari P, Moggach SA, Low PJ. Mix and (Mis)match: further studies of the electronic structure and mixed-valence characteristics of 1,4-diethynylbenzene-bridged bimetallic complexes. Dalton Trans 2020; 49:9835-9848. [PMID: 32633735 DOI: 10.1039/d0dt01794a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The 1,4-diethynylbenzene motif is commonly employed as a bridging ligand in bimetallic molecular systems intended to show pronounced intramolecular electronic interactions, delocalized electronic structures and 'wire-like' properties between the metal fragments at the ligand termini. In contrast to these expectations, the donor-acceptor compounds [{Cp'(CO)xM'}(μ-C[triple bond, length as m-dash]CC6H4C[triple bond, length as m-dash]C){M(PP)Cp'}]n+ [n = 0, 1; M'(CO)xCp' = Fe(CO)2Cp, W(CO)3Cp*; M(PP)Cp' = Fe(dppe)Cp, Fe(dppe)Cp*, Ru(PPh3)2Cp, Ru(dppe)Cp, Ru(dppe)Cp*] display remarkably little bridge-mediated electronic interaction between the electron-rich {M(PP)Cp'} and electron-poor {M'(CO)xCp'} fragments in the ground state. However, a relatively high-energy (26 000-30 000 cm-1) M-to-M' charge transfer can be identified. One-electron oxidation is largely localized on the {M(C[triple bond, length as m-dash]CR)(PP)Cp'} fragment and gives rise to a new charge transfer band with bridging-ligand-to-{M(PP)Cp'}+ (M'(CO)xCp' = Fe(CO)2Cp) or M'-to-M(+) (M(CO)xCp' = W(CO)3Cp*) character. The localized electronic ground state of these complexes is better revealed through analysis of the IR spectra, taking advantage of the well-resolved ν(C[triple bond, length as m-dash]C) and ν(CO) bands and IR spectroelectrochemical methods, than through the more classical analysis based on the concepts of Marcus-Hush theory and analysis of the putative IVCT electronic transition. The conclusions are supported by DFT calculations using the BLYP35 functional.
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Affiliation(s)
- Parvin Safari
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
| | - Stephen A Moggach
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
| | - Paul J Low
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
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Gückel S, Gluyas JBG, Eaves SG, Safari P, Yufit DS, Sobolev AN, Kaupp M, Low PJ. A Spectroscopic and Computationally Minimal Approach to the Analysis of Charge-Transfer Processes in Conformationally Fluxional Mixed-Valence and Heterobimetallic Complexes. Chemistry 2019; 25:8837-8853. [PMID: 31050060 DOI: 10.1002/chem.201901200] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Indexed: 11/09/2022]
Abstract
Class II mixed-valence bimetallic complexes {[Cp'(PP)M]C≡C-C≡N[M'(PP)'Cp']}2+ (M, M'=Ru, Fe; PP=dppe, (PPh3 )2 ; Cp'=Cp*, Cp) exist as conformational ensembles in fluid solution, with a population of structures ranging from cis- to trans-like geometries. Each conformer gives rise to its own series of low-energy intervalence charge-transfer (IVCT) and local d-d transitions, which overlap in the NIR region, giving complex band envelopes in the NIR absorption spectrum, which prevent any meaningful attempt at analysis of the band shape. However, DFT and time-dependent (TD)DFT calculations with dispersion-corrected global-hybrid (BLYP35-D3) or local hybrid (lh-SsirPW92-D3) functionals on a small number of optimised structures chosen to sample the ground state potential energy hypersurfaces of each of these complexes has proven sufficient to explain the major features of the electronic spectra. Although modest in terms of computational expense, this approach provides a more accurate description of the underlying molecular electronic structure than would be possible through analysis of the IVCT band by using the static point-charge model of Marcus-Hush theory and derivatives, or TDDFT calculations from a single (global) minimum energy geometry.
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Affiliation(s)
- Simon Gückel
- Institut für Chemie, Theoretische Chemie/Quantenchemie, Technische Universität Berlin, Sekr. C7, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Josef B G Gluyas
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, 6009, Western Australia, Australia
| | - Samantha G Eaves
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, 6009, Western Australia, Australia.,Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK
| | - Parvin Safari
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, 6009, Western Australia, Australia
| | - Dmitry S Yufit
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK
| | - Alexandre N Sobolev
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, 6009, Western Australia, Australia
| | - Martin Kaupp
- Institut für Chemie, Theoretische Chemie/Quantenchemie, Technische Universität Berlin, Sekr. C7, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Paul J Low
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, 6009, Western Australia, Australia
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Hosseini Ghazvini SMB, Safari P, Mobinikhaledi A, Moghanian H, Rasouli H. Synthesis, characterization, anti-diabetic potential and DFT studies of 7-hydroxy-4-methyl-2-oxo-2H-chromene-8-carbaldehyde oxime. Spectrochim Acta A Mol Biomol Spectrosc 2018; 205:111-131. [PMID: 30015017 DOI: 10.1016/j.saa.2018.07.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 06/30/2018] [Accepted: 07/05/2018] [Indexed: 06/08/2023]
Abstract
A new compound named 7-hydroxy-4-methyl-2-oxo-2H-chromene-8-carbaldehyde oxime (7-Oxime) was synthesized and characterized by FT-IR, FT-Raman, 1H NMR and 13C NMR techniques. The conformer possibilities were studied to find the most stable conformer and its molecular geometry. Then, the dimer form of the most stable monomer was built and optimized. Density functional theory (DFT) B3LYP method with 6-311++G(d,p) basis set was applied to analyze the molecular electrostatic potential (MEP), HOMO and LUMO orbitals, the vibrational wavenumbers, the infrared intensities, the Raman scattering activities and several thermodynamic properties (at different temperatures). The stability of the molecule derived from hyperconjugative interactions and charge delocalization has been analyzed by using natural bond orbital (NBO) analysis. In order to find the possible inhibitory activity of 7-Oxime, an accurate molecular blind docking simulation was performed. The results indicated that the mentioned compound has a good binding affinity to interact with the active sites of human α-glucosidase and α-amylase. For the first time, our computational finding suggests that this compound has a potential to be used as a supplementary agent in the pre-management of diabetes mellitus.
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Affiliation(s)
| | - Parvin Safari
- Department of Chemistry, Faculty of Science, Arak University, Arak, Iran
| | | | - Hassan Moghanian
- Department of Chemistry, Dezful Branch, Islamic Azad University, Dezful, Iran
| | - Hassan Rasouli
- Medical Biology Research Center (MBRC), Kermanshah University of Medical Sciences, Kermanshah, Iran
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Mobinikhaledi A, Moghanian H, Safari P, Firuzian E. Synthesis and Characterization of Novel Heat Resistant, Superparamagnetic Poly(ether-imide) Nanocomposites Containing Xanthene: Representing a Strategy for Improving Thermal Stability of Magnetic Polymer-Based Nanocomposites. J Inorg Organomet Polym Mater 2017. [DOI: 10.1007/s10904-017-0718-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Mobinikhaledi A, Zendehdel M, Safari P. Representation of an Efficient Method for Improving Catalytic Activity of Zeolite Y as a Heterogeneous Catalyst in Synthesis of Some Schiff Bases Based on Azo Compounds. LETT ORG CHEM 2014. [DOI: 10.2174/15701786113106660073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Mobinikhaledi A, Zendehdel M, Safari P. Synthesis and characterization of some novel transition metal Schiff base complexes encapsulated in zeolite Y: effective catalysts for the selective oxidation of benzyl alcohol. Reac Kinet Mech Cat 2013. [DOI: 10.1007/s11144-013-0609-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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