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Li B, Bunescu A, Gaunt MJ. Multicomponent synthesis of α-chloro alkylboronic esters via visible-light-mediated dual catalysis. Chem 2022. [DOI: 10.1016/j.chempr.2022.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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2
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Ding M, Shan BQ, Peng B, Zhou JF, Zhang K. Dynamic Pt-OH -·H 2O-Ag species mediate coupled electron and proton transfer for catalytic hydride reduction of 4-nitrophenol at the confined nanoscale interface. Phys Chem Chem Phys 2022; 24:7923-7936. [PMID: 35311880 DOI: 10.1039/d2cp00673a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Generally, the catalytic transformation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) at heterogeneous metal surfaces follows a Langmuir-Hinshelwood (L-H) mechanism when sodium borohydride (NaBH4) is used as the sacrificial reductant. Herein, with Pt-Ag bimetallic nanoparticles confined in dendritic mesoporous silica nanospheres (DMSNs) as a model catalyst, we demonstrated that the conversion of 4-NP did not pass through the direct hydrogen transfer route with the hydride equivalents being supplied by borohydride via the bimolecular L-H mechanism, since Fourier transform infrared (FTIR) spectroscopy with the use of isotopically labeled reactants (NaBD4 and D2O) showed that the final product of 4-AP was composed of protons (or deuterons) that originated from the solvent water (or heavy water). Combined characterization by X-ray photoelectron spectroscopy (XPS), 1H nuclear magnetic resonance (NMR) and the optical excitation and photoluminescence spectrum evidenced that the surface hydrous hydroxide complex bound to the metal surface (also called structural water molecules, SWs), due to the space overlap of p orbitals of two O atoms in SWs, could form an ensemble of dynamic interface transient states, which provided the alternative electron and proton transfer channels for selective transformation of 4-NP. The cationic Pt species in the Ag-Pt bimetallic catalyst mainly acts as a dynamic adsorption center to temporally anchor SWs and related reactants, and not as the active site for hydrogen activation.
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Affiliation(s)
- Meng Ding
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China.
| | - Bing-Qian Shan
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China.
| | - Bo Peng
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China.
| | - Jia-Feng Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China.
| | - Kun Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China. .,Laboratoire de chimie, Ecole Normale Supérieure de Lyon, Institut de Chimie de Lyon, Université de Lyon, 46 Allée d'italie, 69364 Lyon cedex 07, France.,Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, Shandong, P. R. China.,Institute of Eco-Chongming, Shanghai 202162, China
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Kellett CW, Swords WB, Turlington MD, Meyer GJ, Berlinguette CP. Resolving orbital pathways for intermolecular electron transfer. Nat Commun 2018; 9:4916. [PMID: 30464202 PMCID: PMC6249235 DOI: 10.1038/s41467-018-07263-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 10/18/2018] [Indexed: 11/09/2022] Open
Abstract
Over 60 years have passed since Taube deduced an orbital-mediated electron transfer mechanism between distinct metal complexes. This concept of an orbital pathway has been thoroughly explored for donor-acceptor pairs bridged by covalently bonded chemical residues, but an analogous pathway has not yet been conclusively demonstrated for formally outer-sphere systems that lack an intervening bridge. In our present study, we experimentally resolve at an atomic level the orbital interactions necessary for electron transfer through an explicit intermolecular bond. This finding was achieved using a homologous series of surface-immobilized ruthenium catalysts that bear different terminal substituents poised for reaction with redox active species in solution. This arrangement enabled the discovery that intermolecular chalcogen⋯iodide interactions can mediate electron transfer only when these interactions bring the donor and acceptor orbitals into direct contact. This result offers the most direct observation to date of an intermolecular orbital pathway for electron transfer.
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Affiliation(s)
- Cameron W Kellett
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - Wesley B Swords
- Department of Chemistry, University of North Carolina at Chapel Hill, Murray Hall 2202B, Chapel Hill, NC, 27599-3290, USA
| | - Michael D Turlington
- Department of Chemistry, University of North Carolina at Chapel Hill, Murray Hall 2202B, Chapel Hill, NC, 27599-3290, USA
| | - Gerald J Meyer
- Department of Chemistry, University of North Carolina at Chapel Hill, Murray Hall 2202B, Chapel Hill, NC, 27599-3290, USA.
| | - Curtis P Berlinguette
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada.
- Department of Chemical and Biological Engineering, 2360 East Mall, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada.
- Stewart Blusson Quantum Matter Institute, 2355 East Mall, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada.
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Rotzinger FP, Li H. Quantum Chemical Study of the Redox Potential of the Co(OH 2) 62+/3+ Couple and the Singlet–Quintet Gibbs Energy Difference of the Co(OH 2) 63+ Ion. Inorg Chem 2018; 57:10122-10127. [DOI: 10.1021/acs.inorgchem.8b01308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Hui Li
- Department of Chemistry, Nebraska Center for Materials and Nanoscience, and Center for Integrated Biomolecular Communication, University of Nebraska−Lincoln, Lincoln, Nebraska 68588, United States
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Rotzinger FP. Quantum Chemical Study of the Water Exchange Mechanism of the Neptunyl(VI) and -(V) Aqua Ions. Inorg Chem 2018; 57:2425-2431. [PMID: 29431430 DOI: 10.1021/acs.inorgchem.7b02373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The water exchange reaction of the neptunyl(VI) and -(V) aqua ions was investigated with quantum chemical methods. Associative ( a) and dissociative ( d) exchange mechanisms were studied. The geometries and vibrational frequencies were computed with density functional theory (DFT) and multiconfiguration self-consistent field (MCSCF) methods. The Gibbs activation energies (Δ G‡) for a and d pathways were calculated with DFT and wave function theory (WFT), extended general multiconfiguration quasi-degenerate second-order perturbation theory (XGMC-QDPT2) including spin-orbit (SO) coupling at the SO configuration interaction (CI) level. The DFT-WFT agreement for Δ G‡ was poor for the investigated functionals except for LC-BOP-LRD. Due to ligand-field effects, Δ G‡ for the associatively activated exchange reaction of NpO2(OH2)52+ with a fδ1 electron configuration is higher than for the actinyl(VI) aqua ions of U, Pu, and Am exhibiting f0, fδ2, and fδ2fϕ1 electron configurations.
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Affiliation(s)
- François P Rotzinger
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 6 , CH-1015 Lausanne , Switzerland
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Rotzinger FP. Quantum Chemical Investigation of the Transition States and Intermediates for the Reaction of the Nitrosonium Ion with the Pentaammineazidocobalt(III) Ion. Inorg Chem 2016; 55:12707-12715. [DOI: 10.1021/acs.inorgchem.6b01915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- François P. Rotzinger
- Institut des Sciences et
Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
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Fabrizio A, Rotzinger FP. Quantum Chemical Study of the Water Exchange Mechanism of the Americyl(VI) Aqua Ion. Inorg Chem 2016; 55:11147-11152. [DOI: 10.1021/acs.inorgchem.6b01793] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alberto Fabrizio
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
| | - François P. Rotzinger
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
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Tsai CN, Mazumder S, Zhang XZ, Schlegel HB, Chen YJ, Endicott JF. Are Very Small Emission Quantum Yields Characteristic of Pure Metal-to-Ligand Charge-Transfer Excited States of Ruthenium(II)-(Acceptor Ligand) Chromophores? Inorg Chem 2016; 55:7341-55. [DOI: 10.1021/acs.inorgchem.6b00374] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Chia Nung Tsai
- Department of Chemistry, Fu-Jen Catholic University, New
Taipei City 24205, Taiwan, Republic of China
| | - Shivnath Mazumder
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Xiu Zhu Zhang
- Department of Chemistry, Fu-Jen Catholic University, New
Taipei City 24205, Taiwan, Republic of China
| | - H. Bernhard Schlegel
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Yuan Jang Chen
- Department of Chemistry, Fu-Jen Catholic University, New
Taipei City 24205, Taiwan, Republic of China
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - John F. Endicott
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
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Rotzinger FP. Structure and Properties of Precursor/Successor Complex and Transition State of the FeCl 2+/Fe 2+ Electron Self-Exchange Reaction via the Inner-Sphere Pathway. Inorg Chem 2015; 54:10450-6. [DOI: 10.1021/acs.inorgchem.5b01916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- François P. Rotzinger
- Institut des Sciences et Ingénierie
Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station
6, CH-1015 Lausanne, Switzerland
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Prlj A, Rotzinger FP. Investigation of the water exchange mechanism of the Plutonyl(VI) and Uranyl(VI) ions with quantum chemical methods. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1059425] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Antonio Prlj
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - François P. Rotzinger
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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