1
|
de Moraes MMF, Tecmer P. Towards reliable and efficient modeling of [Cu 2O 2] 2+-based compound electronic structures with the partially fixed reference space protocols. Phys Chem Chem Phys 2024. [PMID: 38984390 DOI: 10.1039/d4cp01309c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
This work reports a computationally efficient approach for reliable modeling of complex electronic structures based on [Cu2O2]2+ moieties. Specifically, we explore the recently developed partially fixed reference space (PFRS) protocol to minimize the active space size, taking into account the double d-shell effects. We show that the ground-state electronic structure of the core [Cu2O2]2+ model system is dominated by the d9/d10 occupations. The PFRS-crafted active spaces are further used to generate the reference wave functions for the multi-reference coupled cluster, configuration interaction, and multi-reference perturbation theory calculations. Specifically, we demonstrate that the bare [Cu2O2]2+ core can be modeled qualitatively using active spaces as small as CAS(2,2)PFRS. To obtain quantitative agreement with the reference DMRG(32,62)CI calculations, the CAS(4,4) has to be used in conjunction with the MRCCSD correction on top of it. This reliable and computationally efficient protocol is further used to model the electronic structure and properties of ammonia coordinated [Cu2O2]2+ complexes. Finally, based on the large amount of available experimental data regarding the oxo-peroxo equilibrium of [Cu2O2]2+-based systems, it is possible to formulate educated guesses regarding the effect of each experimental variable over each d-occupancy-specific state. With a large sample size of d-occupancy-specific state dependence with ligands and solvents, it should be possible to propose new ligands with specific d-occupancy and, therefore, oxidative properties based on the d-occupancy energy gaps of relatively low-cost calculations.
Collapse
Affiliation(s)
- Matheus Morato F de Moraes
- Institute of Physics, Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University in Toruń, Grudziadzka 5, 87-100 Toruń, Poland.
| | - Paweł Tecmer
- Institute of Physics, Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University in Toruń, Grudziadzka 5, 87-100 Toruń, Poland.
| |
Collapse
|
2
|
Hota PK, Jose A, Panda S, Dunietz EM, Herzog AE, Wojcik L, Le Poul N, Belle C, Solomon EI, Karlin KD. Coordination Variations within Binuclear Copper Dioxygen-Derived (Hydro)Peroxo and Superoxo Species; Influences upon Thermodynamic and Electronic Properties. J Am Chem Soc 2024; 146:13066-13082. [PMID: 38688016 PMCID: PMC11161030 DOI: 10.1021/jacs.3c14422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Copper ion is a versatile and ubiquitous facilitator of redox chemical and biochemical processes. These include the binding of molecular oxygen to copper(I) complexes where it undergoes stepwise reduction-protonation. A detailed understanding of thermodynamic relationships between such reduced/protonated states is key to elucidate the fundamentals of the chemical/biochemical processes involved. The dicopper(I) complex [CuI2(BPMPO-)]1+ {BPMPOH = 2,6-bis{[(bis(2-pyridylmethyl)amino]methyl}-4-methylphenol)} undergoes cryogenic dioxygen addition; further manipulations in 2-methyltetrahydrofuran generate dicopper(II) peroxo [CuII2(BPMPO-)(O22-)]1+, hydroperoxo [CuII2(BPMPO-)(-OOH)]2+, and superoxo [CuII2(BPMPO-)(O2•-)]2+ species, characterized by UV-vis, resonance Raman and electron paramagnetic resonance (EPR) spectroscopies, and cold spray ionization mass spectrometry. An unexpected EPR spectrum for [CuII2(BPMPO-)(O2•-)]2+ is explained by the analysis of its exchange-coupled three-spin frustrated system and DFT calculations. A redox equilibrium, [CuII2(BPMPO-)(O22-)]1+ ⇄ [CuII2(BPMPO-)(O2•-)]2+, is established utilizing Me8Fc+/Cr(η6-C6H6)2, allowing for [CuII2(BPMPO-)(O2•-)]2+/[CuII2(BPMPO-)(O22-)]1+ reduction potential calculation, E°' = -0.44 ± 0.01 V vs Fc+/0, also confirmed by cryoelectrochemical measurements (E°' = -0.40 ± 0.01 V). 2,6-Lutidinium triflate addition to [CuII2(BPMPO-)(O22-)]1+ produces [CuII2(BPMPO-)(-OOH)]2+; using a phosphazene base, an acid-base equilibrium was achieved, pKa = 22.3 ± 0.7 for [CuII2(BPMPO-)(-OOH)]2+. The BDFEOO-H = 80.3 ± 1.2 kcal/mol, as calculated for [CuII2(BPMPO-)(-OOH)]2+; this is further substantiated by H atom abstraction from O-H substrates by [CuII2(BPMPO-)(O2•-)]2+ forming [CuII2(BPMPO-)(-OOH)]2+. In comparison to known analogues, the thermodynamic and spectroscopic properties of [CuII2(BPMPO-)] O2-derived adducts can be accounted for based on chelate ring size variations built into the BPMPO- framework and the resulting enhanced CuII-ion Lewis acidity.
Collapse
Affiliation(s)
- Pradip Kumar Hota
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Anex Jose
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Sanjib Panda
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Eleanor M Dunietz
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Austin E Herzog
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Laurianne Wojcik
- UMR CNRS 6521, Université de Bretagne Occidentale, 6 Avenue Le Gorgeu, CS 93837, Brest Cedex 3 29238, France
| | - Nicolas Le Poul
- UMR CNRS 6521, Université de Bretagne Occidentale, 6 Avenue Le Gorgeu, CS 93837, Brest Cedex 3 29238, France
| | - Catherine Belle
- Université Grenoble-Alpes, CNRS, DCM, UMR 5250, Grenoble 38058, France
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Kenneth D Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| |
Collapse
|
3
|
Lionetti D, Suseno S, Shiau AA, de Ruiter G, Agapie T. Redox Processes Involving Oxygen: The Surprising Influence of Redox-Inactive Lewis Acids. JACS AU 2024; 4:344-368. [PMID: 38425928 PMCID: PMC10900226 DOI: 10.1021/jacsau.3c00675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 03/02/2024]
Abstract
Metalloenzymes with heteromultimetallic active sites perform chemical reactions that control several biogeochemical cycles. Transformations catalyzed by such enzymes include dioxygen generation and reduction, dinitrogen reduction, and carbon dioxide reduction-instrumental transformations for progress in the context of artificial photosynthesis and sustainable fertilizer production. While the roles of the respective metals are of interest in all these enzymatic transformations, they share a common factor in the transfer of one or multiple redox equivalents. In light of this feature, it is surprising to find that incorporation of redox-inactive metals into the active site of such an enzyme is critical to its function. To illustrate, the presence of a redox-inactive Ca2+ center is crucial in the Oxygen Evolving Complex, and yet particularly intriguing given that the transformation catalyzed by this cluster is a redox process involving four electrons. Therefore, the effects of redox inactive metals on redox processes-electron transfer, oxygen- and hydrogen-atom transfer, and O-O bond cleavage and formation reactions-mediated by transition metals have been studied extensively. Significant effects of redox inactive metals have been observed on these redox transformations; linear free energy correlations between Lewis acidity and the redox properties of synthetic model complexes are observed for several reactions. In this Perspective, these effects and their relevance to multielectron processes will be discussed.
Collapse
Affiliation(s)
| | - Sandy Suseno
- Division of Chemistry and
Chemical Engineering, California Institute
of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
| | - Angela A. Shiau
- Division of Chemistry and
Chemical Engineering, California Institute
of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
| | - Graham de Ruiter
- Division of Chemistry and
Chemical Engineering, California Institute
of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
| | - Theodor Agapie
- Division of Chemistry and
Chemical Engineering, California Institute
of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
| |
Collapse
|
4
|
King DS, Wang F, Gerken JB, Gaggioli CA, Guzei IA, Kim YJ, Stahl SS, Gagliardi L. Divergent Bimetallic Mechanisms in Copper(II)-Mediated C-C, N-N, and O-O Oxidative Coupling Reactions. J Am Chem Soc 2024; 146:3521-3530. [PMID: 38284769 DOI: 10.1021/jacs.3c13649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Copper-catalyzed aerobic oxidative coupling of diaryl imines provides a route for conversion of ammonia to hydrazine. The present study uses experimental and density functional theory computational methods to investigate the mechanism of N-N bond formation, and the data support a mechanism involving bimolecular coupling of Cu-coordinated iminyl radicals. Computational analysis is extended to CuII-mediated C-C, N-N, and O-O coupling reactions involved in the formation of cyanogen (NC-CN) from HCN, 1,3-butadiyne from ethyne (i.e., Glaser coupling), hydrazine from ammonia, and hydrogen peroxide from water. The results reveal two different mechanistic pathways. Heteroatom ligands with an uncoordinated lone pair (iminyl, NH2, OH) undergo charge transfer to CuII, generating ligand-centered radicals that undergo facile bimolecular radical-radical coupling. Ligands lacking a lone pair (CN and CCH) form bridged binuclear diamond-core structures that undergo C-C coupling. This mechanistic bifurcation is rationalized by analysis of spin densities in key intermediates and transition states, as well as multiconfigurational calculations. Radical-radical coupling is especially favorable for N-N coupling owing to energetically favorable charge transfer in the intermediate and thermodynamically favorable product formation.
Collapse
Affiliation(s)
- Daniel S King
- Department of Chemistry, University of Chicago, Chicago, Illinois 60615, United States
| | - Fei Wang
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - James B Gerken
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | | | - Ilia A Guzei
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Yeon Jung Kim
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Laura Gagliardi
- Department of Chemistry, Pritzker School of Molecular Engineering, James Franck Institute, Chicago Center for Theoretical Chemistry, University of Chicago, Chicago, Illinois 60615, United States
| |
Collapse
|
5
|
Teimouri M, Raju S, Acheampong E, Schmittou AN, Donnadieu B, Wipf DO, Pierce BS, Stokes SL, Emerson JP. Aminoquinoline-Based Tridentate ( NNN)-Copper Catalyst for C-N Bond-Forming Reactions from Aniline and Diazo Compounds. Molecules 2024; 29:730. [PMID: 38338473 PMCID: PMC10856582 DOI: 10.3390/molecules29030730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/23/2024] [Accepted: 01/28/2024] [Indexed: 02/12/2024] Open
Abstract
A new tridentate Cu2+ complex based on (E)-1-(pyridin-2-yl)-N-(quinolin-8-yl)methanimine (PQM) was generated and characterized to support the activation of diazo compounds for the formation of new C-N bonds. This neutral Schiff base ligand was structurally characterized to coordinate with copper(II) in an equatorial fashion, yielding a distorted octahedral complex. Upon characterization, this copper(II) complex was used to catalyze an efficient and cost-effective protocol for C-N bond formation between N-nucleophiles and copper carbene complexes arising from the activation of diazo carbonyl compounds. A substrate scope of approximately 15 different amine-based substrates was screened, yielding 2° or 3° amine products with acceptable to good yields under mild reaction conditions. Reactivity towards phenol and thiophenol were also screened, showing relatively weak C-O or C-S bond formation under optimized conditions.
Collapse
Affiliation(s)
- Mohsen Teimouri
- Department of Chemistry, Mississippi State University, Starkville, MS 39762, USA (B.D.); (D.O.W.)
| | - Selvam Raju
- Department of Chemistry, Mississippi State University, Starkville, MS 39762, USA (B.D.); (D.O.W.)
| | - Edward Acheampong
- Department of Chemistry, Mississippi State University, Starkville, MS 39762, USA (B.D.); (D.O.W.)
| | - Allison N. Schmittou
- Department of Chemistry and Biochemistry, The University of Alabama, 3097D Shelby Hall, Tuscaloosa, AL 35487, USA
| | - Bruno Donnadieu
- Department of Chemistry, Mississippi State University, Starkville, MS 39762, USA (B.D.); (D.O.W.)
| | - David O. Wipf
- Department of Chemistry, Mississippi State University, Starkville, MS 39762, USA (B.D.); (D.O.W.)
| | - Brad S. Pierce
- Department of Chemistry and Biochemistry, The University of Alabama, 3097D Shelby Hall, Tuscaloosa, AL 35487, USA
| | - Sean L. Stokes
- Department of Chemistry, Mississippi State University, Starkville, MS 39762, USA (B.D.); (D.O.W.)
| | - Joseph P. Emerson
- Department of Chemistry, Mississippi State University, Starkville, MS 39762, USA (B.D.); (D.O.W.)
| |
Collapse
|
6
|
Siebe L, Butenuth C, Stammler A, Bögge H, Walleck S, Glaser T. Generation and Reactivity of μ-1,2-Peroxo Cu IICu II and Bis-μ-oxo Cu IIICu III Species and Catalytic Hydroxylation of Benzene to Phenol with Hydrogen Peroxide. Inorg Chem 2024; 63:2627-2639. [PMID: 38243916 DOI: 10.1021/acs.inorgchem.3c03914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2024]
Abstract
Tetradentate-N4 ligands stabilize dinuclear {CuII(μ-1,2-peroxo)CuII} and {CuIII(μ-O)2CuIII} species, and CuII complexes of these ligands were reported to catalyze the oxidation of benzene with H2O2. Here, we report {CuII(μ-1,2-peroxo)CuII} and {CuIII(μ-O)2CuIII} intermediates of dinucleating bis(tetradentate-N4) ligands depending on the absence or presence of 6-methyl substituents on the terminal pyridine donors, respectively, generated either from {CuICuI} precursors with O2 or from {CuIICuII} precursors with H2O2 and NEt3. Both intermediates are not stable even at low temperatures, but they show no electrophilic HAT reactivity with DHA. Catalytic investigations on the hydroxylation of benzene with excess H2O2 between 30 and 50 °C indicate that both radical-based and {Cu2On}-based mechanisms depend strongly on the catalytic conditions. In the presence of a radical scavenger, TONs of ∼920/∼720 have been achieved without/with the 6-methyl group of the ligand. Although {CuII(μ-OH)CuII} reacts with excess H2O2 at -40 °C to {CuII(OOH)}2 species, these are only stable for seconds at 20 °C and cannot account for catalytic oxidations over a period of 24 h at 30-50 °C.
Collapse
Affiliation(s)
- Lena Siebe
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
| | - Christoph Butenuth
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
| | - Anja Stammler
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
| | - Hartmut Bögge
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
| | - Stephan Walleck
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
| | - Thorsten Glaser
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
| |
Collapse
|
7
|
Sarkar A, Das S, Mondal P, Maiti B, Sen Gupta S. Synthesis, Characterization, and Reactivity of High-Valent Carbene Dicarboxamide-Based Nickel Pincer Complexes. Inorg Chem 2023. [PMID: 38001041 DOI: 10.1021/acs.inorgchem.3c03465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2023]
Abstract
High-valent metal-fluoride complexes are currently being explored for concerted proton-electron transfer (CPET) reactions, the driving force being the high bond dissociation energy of H-F (BDEH-F = 135 kcal/mol) that is formed after the reaction. Ni(III)-fluoride-based complexes on the pyridine dicarboxamide pincer ligand framework have been utilized for CPET reactions toward phenols and hydrocarbons. We have replaced the central pyridine ligand with an N-heterocyclic carbene carbene to probe its effect in both stabilizing the high-valent Ni(III) state and its ability to initiate CPET reactions. We report a monomeric carbene-diamide-based Ni(II)-fluoride pincer complex that was characterized through 1H/19F NMR, mass spectrometry, UV-vis, and X-ray crystallography analysis. Although carbenes and deprotonated carboxamides in the Ni(II)-fluoride complex are expected to stabilize the Ni(III) state upon oxidation, the Ni(III)/Ni(II) redox process occurred at very high potential (0.87 V vs Fc+/Fc, dichloromethane) and was irreversible. Structural studies indicate significant distortion in the imidazolium "NCN" carbene plane of Ni(II)-fluoride caused by the formation of six-membered metallacycles. The high-valent NiIII-fluoride analogue was synthesized by the addition of 1.0 equiv CTAN (ceric tetrabutylammonium nitrate) in dichloromethane at -20 °C which was characterized by UV-vis, mass spectrometry, and EPR spectroscopy. Density functional theory studies indicate that the Ni-carbene bond elongated, while the Ni-F bond shortened upon oxidation to the Ni(III) species. The high-valent Ni(III)-fluoride was found to react with the substituted phenols. Analysis of the KIE and linear free energy relationship correlates well with the CPET nature of the reaction. Preliminary analysis indicates that the CPET is asynchronous and is primarily driven by the E0' of the Ni(III)-fluoride complex.
Collapse
Affiliation(s)
- Aniruddha Sarkar
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
| | - Soumadip Das
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
| | - Prasenjit Mondal
- Department of Chemistry, Indian Institute of Technology Tirupati (IIT Tirupati), Tirupati, AP 517619, India
| | - Biswajit Maiti
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Sayam Sen Gupta
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
| |
Collapse
|
8
|
Pluschke K, Herrmann A, Dürr M. Soft Deposition of Organic Molecules Based on Cluster-Induced Desorption for the Investigation of On-Surface and Surface-Mediated Reactions. ACS OMEGA 2023; 8:40639-40646. [PMID: 37929133 PMCID: PMC10620888 DOI: 10.1021/acsomega.3c05518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 10/02/2023] [Indexed: 11/07/2023]
Abstract
Desorption/ionization induced by neutral clusters (DINeC) was employed for the soft transfer of organic and biomolecules, such as porphyrins and peptides, from a bulk sample onto any substrate of choice. Qualitative analysis of the deposition technique was performed by means of mass spectrometry, demonstrating that the deposited molecules remained intact due to the soft nature of the transfer process. Deposition rates were studied quantitatively using a quartz crystal microbalance; layers of intact biomolecules ranging from the submonolayer regime up to a few monolayers in thickness were realized. Mixed layers of molecules were deposited when two different sources of molecules were employed. The samples which were prepared based on this soft deposition method were used for the investigation of reactions of the deposited molecules with either coadsorbates on the surface or the surface itself. Examples include adduct formation of peptides with alkali metals on SiO2, the oxidation of peptides exposed to oxygen, as well as the metallization of porphyrins in interaction with the substrate.
Collapse
Affiliation(s)
- Karolin Pluschke
- Institut für Angewandte Physik
and Zentrum für Materialforschung, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
| | - Aaron Herrmann
- Institut für Angewandte Physik
and Zentrum für Materialforschung, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
| | - Michael Dürr
- Institut für Angewandte Physik
and Zentrum für Materialforschung, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
| |
Collapse
|
9
|
Wang SY, Zhang JR, Guo M, Hua W. Interpreting the Cu-O 2 Antibonding Nature in Two Cu-O 2 Complexes from Cu L-Edge X-ray Absorption Spectra. Inorg Chem 2023; 62:17115-17125. [PMID: 37828769 DOI: 10.1021/acs.inorgchem.3c01896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Cu-O2 structures play important roles in bioinorganic chemistry and enzyme catalysis, where the bonding between the Cu and O2 parts serves as a fundamental research concern. Here, we performed a multiconfigurational study on the copper L2,3-edge X-ray absorption spectra (XAS) of two copper enzyme model complexes to gain a better understanding of the antibonding nature from the clearly interpreted structure-spectroscopy relation. We obtained spectra in good agreement with the experiments by using the restricted active space second-order perturbation theory (RASPT2) method, which facilitated reliable chemical analysis. Spectral feature interpretations were supported by computing the spin-orbit natural transition orbitals. All major features were assigned to be mainly from Cu 2p to antibonding orbitals between Cu 3d and O2 π*, Cu 3d-πO-O* (type A), and a few also to mixed antibonding/bonding orbitals between Cu 3d and O2 π, Cu 3d ± πO-O (type M). Our calculations provided a clear illustration of the interactions between Cu 3d and O2 π*/π orbitals that are carried in the metal L-edge XAS.
Collapse
Affiliation(s)
- Sheng-Yu Wang
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Department of Applied Physics, School of Science, Nanjing University of Science and Technology, 210094 Nanjing, China
| | - Jun-Rong Zhang
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Department of Applied Physics, School of Science, Nanjing University of Science and Technology, 210094 Nanjing, China
| | - Meiyuan Guo
- Department of Chemistry-Ångström Laboratory, Uppsala University, Uppsala 75105, Sweden
| | - Weijie Hua
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Department of Applied Physics, School of Science, Nanjing University of Science and Technology, 210094 Nanjing, China
| |
Collapse
|
10
|
Hoefnagel ME, Rademaker D, Hetterscheid DGH. Directing the Selectivity of Oxygen Reduction to Water by Confining a Cu Catalyst in a Metal Organic Framework. CHEMSUSCHEM 2023; 16:e202300392. [PMID: 37326580 DOI: 10.1002/cssc.202300392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/17/2023]
Abstract
Electrocatalysis is to play a key role in the transition towards a sustainable chemical and energy industry and active, stable and selective redox catalysts are much needed. Porous structures such as metal organic frameworks (MOFs) are interesting materials as these may influence selectivity of chemical reactions through confinement effects. In this work, the oxygen reduction catalyst Cu-tmpa was incorporated into the NU1000 MOF. Confinement of the catalyst within NU1000 steers the selectivity of the oxygen reduction reaction (ORR) towards water rather than peroxide. This is attributed to retention of the obligatory H2 O2 intermediate in close proximity to the catalytic center. Moreover, the resulting NU1000|Cu-tmpa MOF shows an excellent activity and stability in prolonged electrochemical studies, illustrating the potential of this approach.
Collapse
Affiliation(s)
- Marlene E Hoefnagel
- Leiden Institute of Chemistry, Leiden University, P.O Box 9502, 2300 RA, Leiden, The Netherlands
| | - Dana Rademaker
- Leiden Institute of Chemistry, Leiden University, P.O Box 9502, 2300 RA, Leiden, The Netherlands
| | - Dennis G H Hetterscheid
- Leiden Institute of Chemistry, Leiden University, P.O Box 9502, 2300 RA, Leiden, The Netherlands
| |
Collapse
|
11
|
Naher M, Su C, Harmer JR, Williams CM, Bernhardt PV. Electrocatalytic Atom Transfer Radical Addition with Turbocharged Organocopper(II) Complexes. Inorg Chem 2023; 62:15575-15583. [PMID: 37712595 DOI: 10.1021/acs.inorgchem.3c02106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
The utility and scope of Cu-catalyzed halogen atom transfer chemistry have been exploited in the fields of atom transfer radical polymerization and atom transfer radical addition, where the metal plays a key role in radical formation and minimizing unwanted side reactions. We have shown that electrochemistry can be employed to modulate the reactivity of the Cu catalyst between its active (CuI) and dormant (CuII) states in a variety of ligand systems. In this work, a macrocyclic pyridinophane ligand (L1) was utilized, which can break the C-Br bond of BrCH2CN to release •CH2CN radicals when in complex with CuI. Moreover, the [CuI(L1)]+ complex can capture the •CH2CN radical to form a new species [CuII(L1)(CH2CN)]+ in situ that, on reduction, exhibits halogen atom transfer reactivity 3 orders of magnitude greater than its parent complex [CuI(L1)]+. This unprecedented rate acceleration has been identified by electrochemistry, successfully reproduced by simulation, and exploited in a Cu-catalyzed bulk electrosynthesis where [CuII(L1)(CH2CN)]+ participates as a radical donor in the atom transfer radical addition of BrCH2CN to a selection of styrenes. The formation of these turbocharged catalysts in situ during electrosynthesis offers a new approach to the Cu-catalyzed organic reaction methodology.
Collapse
Affiliation(s)
- Masnun Naher
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Chuyi Su
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Jeffrey R Harmer
- Centre for Advanced Imaging, University of Queensland, Brisbane 4072, Australia
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| |
Collapse
|
12
|
Li Y, Feng J, Huang F, Baell JB. Synthesis of 3-Azabicyclo[3.1.0]hexane Derivates. Chemistry 2023; 29:e202301017. [PMID: 37269044 DOI: 10.1002/chem.202301017] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/28/2023] [Accepted: 06/02/2023] [Indexed: 06/04/2023]
Abstract
3-Azabicyclo[3.1.0]hexanes are an important class of nitrogen-containing heterocycles that have been found to be key structural features in a wide range of biologically active natural products, drugs, and agrochemicals. As a cutting-edge area, the synthesis of these derivatives has made spectacular progress in recent decades, with various transition-metal-catalyzed and transition-metal-free catalytic systems being developed. In this review, we provide an overview of recent advances in the efficient methods for the synthesis of 3-azabicyclo[3.1.0]hexane derivatives since 2010, emphasizing the scope of substrates and synthesis' applications, as well as the mechanisms of these reactions.
Collapse
Affiliation(s)
- Yufeng Li
- School of Pharmaceutical Sciences, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing, Jiangsu, 211816, China
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, No.1 Wenyuan Road, Nanjing, Jiangsu, 210023, China
| | - Jiajun Feng
- School of Pharmaceutical Sciences, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing, Jiangsu, 211816, China
| | - Fei Huang
- School of Pharmaceutical Sciences, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing, Jiangsu, 211816, China
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, No.1 Wenyuan Road, Nanjing, Jiangsu, 210023, China
| | - Jonathan B Baell
- School of Pharmaceutical Sciences, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing, Jiangsu, 211816, China
| |
Collapse
|
13
|
Ajaykamal T, Palaniandavar M. Mononuclear nickel(ii)-flavonolate complexes of tetradentate tripodal 4N ligands as structural and functional models for quercetin 2,4-dioxygenase: structures, spectra, redox and dioxygenase activity. RSC Adv 2023; 13:24674-24690. [PMID: 37601601 PMCID: PMC10436029 DOI: 10.1039/d3ra04834a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 08/01/2023] [Indexed: 08/22/2023] Open
Abstract
Three new nickel(ii)-flavonolate complexes of the type [Ni(L)(fla)](ClO4) 1-3, where L is the tripodal 4N ligand tris(pyrid-2-ylmethyl)amine (tpa, L1) or (pyrid-2-ylmethyl)bis(6-methylpyrid-2-ylmethyl)amine (6-Me2-tpa, L2) or tris(N-Et-benzimidazol-2-ylmethyl)amine (Et-ntb, L3), have been isolated as functional models for Ni(ii)-containing quercetin 2,4-dioxygenase. Single crystal X-ray structures of 1 and 3 reveal that Ni(ii) is involved in π-back bonding with flavonolate (fla-), as evident from enhancement in C[double bond, length as m-dash]O bond length upon coordination [H(fla), 1.232(3); 1, 1.245(7); 3, 1.262(8) Å]. More asymmetric chelation of fla- in 3 than in 1 [Δd = (Ni-Ocarbonyl - Ni-Oenolate): 1, 0.126; 3, 0.182 Å] corresponds to lower π-delocalization in 3 with electron-releasing N-Et substituent. The optimized structures of 1-3 and their geometrical isomers have been computed by DFT methods. The HOMO and LUMO, both localized on Ni(ii)-bound fla-, are highly conjugated bonding π- and antibonding π*-orbitals respectively. They are located higher in energy than the Ni(ii)-based MOs (HOMO-1, dx2-y2; HOMO-2/6, dz2), revealing that the Ni(ii)-bound fla- rather than Ni(ii) would undergo oxidation upon exposure to dioxygen. The results of computational studies, in combination with spectral and electrochemical studies, support the involvement of redox-inactive Ni(ii) in π-back bonding with fla-, tuning the π-delocalization in fla- and hence its activation. Upon exposure to dioxygen, all the flavonolate adducts in DMF solution decompose to produce CO and depside, which then is hydrolyzed to give the corresponding acids at 70 °C. The highest rate of dioxygenase reactivity of 3 (kO2: 3 (29.10 ± 0.16) > 1 (16.67 ± 0.70) > 2 (1.81 ± 0.04 × 10-1 M-1 s-1)), determined by monitoring the disappearance of the LMCT band in the range 440-450 nm, is ascribed to the electron-releasing N-Et substituent on bzim ring, which decreases the π-delocalization in fla- and enhances its activation.
Collapse
Affiliation(s)
- Tamilarasan Ajaykamal
- Department of Chemistry, Bharathidasan University Tiruchirapalli 620 024 Tamil Nadu India +91-431-2407043 +91-431-2407125
| | - Mallayan Palaniandavar
- Department of Chemistry, Bharathidasan University Tiruchirapalli 620 024 Tamil Nadu India +91-431-2407043 +91-431-2407125
| |
Collapse
|
14
|
Li L, Shen S, Bickler P, Jacobson MP, Wu LF, Altschuler SJ. Searching for molecular hypoxia sensors among oxygen-dependent enzymes. eLife 2023; 12:e87705. [PMID: 37494095 PMCID: PMC10371230 DOI: 10.7554/elife.87705] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 07/09/2023] [Indexed: 07/27/2023] Open
Abstract
The ability to sense and respond to changes in cellular oxygen levels is critical for aerobic organisms and requires a molecular oxygen sensor. The prototypical sensor is the oxygen-dependent enzyme PHD: hypoxia inhibits its ability to hydroxylate the transcription factor HIF, causing HIF to accumulate and trigger the classic HIF-dependent hypoxia response. A small handful of other oxygen sensors are known, all of which are oxygen-dependent enzymes. However, hundreds of oxygen-dependent enzymes exist among aerobic organisms, raising the possibility that additional sensors remain to be discovered. This review summarizes known and potential hypoxia sensors among human O2-dependent enzymes and highlights their possible roles in hypoxia-related adaptation and diseases.
Collapse
Affiliation(s)
- Li Li
- Department of Pharmaceutical Chemistry, University of California San Francisco, San FranciscoSan FranciscoUnited States
| | - Susan Shen
- Department of Pharmaceutical Chemistry, University of California San Francisco, San FranciscoSan FranciscoUnited States
- Department of Psychiatry, University of California, San FranciscoSan FranciscoUnited States
| | - Philip Bickler
- Hypoxia Research Laboratory, University of California San Francisco, San FranciscoSan FranciscoUnited States
- Center for Health Equity in Surgery and Anesthesia, University of California San Francisco, San FranciscoSan FranciscoUnited States
- Anesthesia and Perioperative Care, University of California San Francisco, San FranciscoSan FranciscoUnited States
| | - Matthew P Jacobson
- Department of Pharmaceutical Chemistry, University of California San Francisco, San FranciscoSan FranciscoUnited States
| | - Lani F Wu
- Department of Pharmaceutical Chemistry, University of California San Francisco, San FranciscoSan FranciscoUnited States
| | - Steven J Altschuler
- Department of Pharmaceutical Chemistry, University of California San Francisco, San FranciscoSan FranciscoUnited States
| |
Collapse
|
15
|
Jeong D, Selverstone Valentine J, Cho J. Bio-inspired mononuclear nonheme metal peroxo complexes: Synthesis, structures and mechanistic studies toward understanding enzymatic reactions. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
16
|
Wu Y, Zhao C, Su Y, Shaik S, Lai W. Mechanistic Insight into Peptidyl-Cysteine Oxidation by the Copper-Dependent Formylglycine-Generating Enzyme. Angew Chem Int Ed Engl 2023; 62:e202212053. [PMID: 36545867 DOI: 10.1002/anie.202212053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 12/21/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
The copper-dependent formylglycine-generating enzyme (FGE) catalyzes the oxygen-dependent oxidation of specific peptidyl-cysteine residues to formylglycine. Our QM/MM calculations provide a very likely mechanism for this transformation. The reaction starts with dioxygen binding to the tris-thiolate CuI center to form a triplet CuII -superoxide complex. The rate-determining hydrogen atom abstraction involves a triplet-singlet crossing to form a CuII -OOH species that couples with the substrate radical, leading to a CuI -alkylperoxo intermediate. This is accompanied by proton transfer from the hydroperoxide to the S atom of the substrate via a nearby water molecule. The subsequent O-O bond cleavage is coupled with the C-S bond breaking that generates the formylglycine and a CuII -oxyl complex. Moreover, our results suggest that the aldehyde oxygen of the final product originates from O2 , which will be useful for future experimental work.
Collapse
Affiliation(s)
- Yao Wu
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing, 100872, China
| | - Cong Zhao
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing, 100872, China
| | - Yanzhuang Su
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing, 100872, China
| | - Sason Shaik
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Wenzhen Lai
- Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing, 100872, China
| |
Collapse
|
17
|
Interplay of electronic and geometric structure on Cu phenanthroline, bipyridine and derivative complexes, synthesis, characterization, and reactivity towards oxygen. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214943] [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]
|
18
|
Underhill J, Yang ES, Schmidt-Räntsch T, Myers WK, Goicoechea JM, Abbenseth J. Dioxygen Splitting by a Tantalum(V) Complex Ligated by a Rigid, Redox Non-Innocent Pincer Ligand. Chemistry 2023; 29:e202203266. [PMID: 36281622 PMCID: PMC10098518 DOI: 10.1002/chem.202203266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Indexed: 12/05/2022]
Abstract
The reaction of TaMe3 Cl2 with the rigid acridane-derived trisamine H3 NNN yields the tantalum(V) complex [TaCl2 (NNNcat )]. Subsequent reaction with dioxygen results in the full four-electron reduction of O2 yielding the oxido-bridged bimetallic complex [{TaCl2 (NNNsq )}2 O]. This dinuclear complex features an open-shell ground state due to partial ligand oxidation and was comprehensively characterized by single crystal X-ray diffraction, LIFDI mass spectrometry, NMR, EPR, IR and UV/VIS/NIR spectroscopy. The mechanism of O2 activation was investigated by DFT calculations revealing initial binding of O2 to the tantalum(V) center followed by complete O2 scission to produce a terminal oxido-complex.
Collapse
Affiliation(s)
- Jack Underhill
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Rd., Oxford, OX1 3TA, United Kingdom
| | - Eric S Yang
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Rd., Oxford, OX1 3TA, United Kingdom
| | - Till Schmidt-Räntsch
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße 4, 37077, Göttingen, Germany
| | - William K Myers
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Rd., Oxford, OX1 3TA, United Kingdom
| | - Jose M Goicoechea
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Rd., Oxford, OX1 3TA, United Kingdom
| | - Josh Abbenseth
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Rd., Oxford, OX1 3TA, United Kingdom
| |
Collapse
|
19
|
Kaur P, Verma I, Shashikant, Khanum G, Siddiqui N, Javed S, Arora H. Dimeric ZnII complex of carboxylate-appended (2-pyridyl)alkylamine ligand and Exploration of experimental, theoretical, molecular docking and electronic excitation studies of ligand. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
|
20
|
Khatua M, Goswami B, Hans S, Kamal, Mazumder S, Samanta S. Hemilabile Amine-Functionalized Efficient Azo-Aromatic Cu-Catalysts Inspired by Galactose Oxidase: Impact of Amine Sidearm on Catalytic Aerobic Oxidation of Alcohols. Inorg Chem 2022; 61:17777-17789. [DOI: 10.1021/acs.inorgchem.2c03087] [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)
- Manas Khatua
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata Mohanpur, Kolkata 741246, India
| | - Bappaditya Goswami
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata Mohanpur, Kolkata 741246, India
| | - Shivali Hans
- Department of Chemistry, Indian Institute of Technology Jammu Jagti, Jammu 181221, India
| | - Kamal
- Department of Chemistry, Indian Institute of Technology Jammu Jagti, Jammu 181221, India
| | - Shivnath Mazumder
- Department of Chemistry, Indian Institute of Technology Jammu Jagti, Jammu 181221, India
| | - Subhas Samanta
- Department of Chemistry, Indian Institute of Technology Jammu Jagti, Jammu 181221, India
| |
Collapse
|
21
|
Seikh L, Dey S, Dhara S, Singh A, Lahiri GK. Inner-Sphere Electron Transfer Induced Reversible Electron Reservoir Feature of Azoheteroarene Bridged Diruthenium Frameworks. Inorg Chem 2022; 61:15735-15746. [PMID: 36129962 DOI: 10.1021/acs.inorgchem.2c02921] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This article demonstrates the stabilization of ground- and redox-induced metal-to-ligand charge transfer excited states on coordination of azo-coupled bmpd(L4) [bmpd = (E)-1,2-bis(1-methyl-1H-pyrazol-3-yl)diazene; L4 = -N═N-] to the electron-rich {Ru(acac)2} (acac = acetylacetonate) unit in mononuclear RuII(acac)2(L4) (1) and diastereomeric dinuclear (acac)2Ru2.5(μ-L4•-)Ru2.5(acac)2 [rac, ΔΔ/ΛΛ (2a)/meso, ΔΛ (2b)] complexes, respectively. It also develops further one-step intramolecular electron transfer induced L4•- bridged isovalent higher analogue [(acac)2RuIII(μ-L4•-)RuIII(acac)2]ClO4 in diastereomeric forms, rac-[2a]ClO4/meso-[2b]ClO4. On the contrary, under identical reaction conditions electronically and sterically permuted bimpd [L5, (E)-1,2-bis(4-iodo-1-methyl-1H-pyrazol-3-yl)diazene)] delivered mononuclear RuII(acac)2(L5) (3) as an exclusive product. Further, the generation of unprecedented heterotrinuclear complex [(acac)2RuII(μ-L4)AgI(μ-L4)RuII(acac)2]ClO4 ([4]ClO4) involving unreduced L4 via the reaction of 1 and AgClO4 revealed the absence of any inner-sphere electron transfer (IET) as in precursor 1, which in turn reaffirmed an IET (at the interface of electron-rich Ru(acac)2 and acceptor L4) mediated stabilization of 2. Structural authentication of the complexes with special reference to the tunable azo distance (N═N, N-N•-, N-N2-) of L and their spectro-electrochemical events in accessible redox states including the reversible electron reservoir feature of 2 → 2+/2+ → 2 were evaluated in conjunction with density functional theory/time-dependent density functional theory calculations. The varying extent of IET as a function of heteroaromatics appended to the azo group of L (L1 = abpy = 2,2'-azobipyridine, L2 = abbt = 2,2'-azobis(benzothiazole), L3 = abim = azobis(1-methylbenzimidazole), L4 and L5, Schemes 1 & 2) in the Ru(acac)2-derived respective molecular setup has been addressed.
Collapse
Affiliation(s)
- Liton Seikh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sanchaita Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Suman Dhara
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Aditi Singh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| |
Collapse
|
22
|
Brazzolotto D, Nédellec Y, Philouze C, Holzinger M, Thomas F, Le Goff A. Functionalizing Carbon Nanotubes with Bis(2,9-dialkyl-1,10-phenanthroline)copper(II) Complexes for the Oxygen Reduction Reaction. Inorg Chem 2022; 61:14997-15006. [DOI: 10.1021/acs.inorgchem.2c01791] [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)
| | | | | | | | | | - Alan Le Goff
- Univ. Grenoble Alpes, CNRS, DCM, 38000 Grenoble, France
| |
Collapse
|
23
|
Yang F, Wang J, Yin K, Pang H. An Electrochemical Sensor for Sunset Yellow Detection Based on Cu@Cu 2O-BNPC Formed by Modified Porous Carbon. ACS OMEGA 2022; 7:32068-32077. [PMID: 36119991 PMCID: PMC9476532 DOI: 10.1021/acsomega.2c03319] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
Control and detection of sunset yellow (SY) are an utmost demanding issue due to its high risk of detrimental effects on living systems caused by excessive ingestion. In this study, we reported the synthesis of Cu@Cu2O nanoparticle-decorated B and N codoped porous carbon (BNPC) and its use in developing a novel electrochemical sensor for SY. The Cu@Cu2O-BNPC catalyst was fabricated through single-step polymerization, followed by carbonization. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy characterization results showed that Cu@Cu2O anchored on the porous BNPC successfully. Compared with the BNPC-modified electrode, it was found that the Cu@Cu2O-BNPC-modified electrode showed superior electrocatalytic activity in both electrochemical impedance spectroscopy and cyclic voltammetry tests. The as-prepared Cu@Cu2O-BNPC catalyst directly acted as a sensor for amperometric detection of SY without further assembling, which exhibited an ultrahigh sensitivity of 0.09 μA nM-1 cm-2, a low limit of detection (2.4 nM), and a wide linear detection ranging from 10 nM to 8 μM. To further validate its possible application, the proposed method was successfully used for the determination of SY in Fanta drinks with satisfactory results.
Collapse
Affiliation(s)
- Feiyu Yang
- School
of Petrochemical Engineering, Changzhou
University, Changzhou, Jiangsu 213164, P.R. China
| | - Jiamin Wang
- School
of Food Science and Technology, Yangzhou
University, Yangzhou, Jiangsu 225127, P.R. China
| | - Kailiang Yin
- School
of Petrochemical Engineering, Changzhou
University, Changzhou, Jiangsu 213164, P.R. China
| | - Huan Pang
- School
of Chemistry and Chemical Engineering, Yangzhou
University, Yangzhou, Jiangsu 225002, P.R. China
| |
Collapse
|
24
|
Zhu Y, Zhao Y, Sun X, An F, Jiao L, Sun X. Cu-Ce oxide Co-loaded silicon nanocapsules for hydrogen peroxide self-supplied Fenton-like catalysis and synergistically antibacterial therapy. ENVIRONMENTAL RESEARCH 2022; 212:113444. [PMID: 35568231 DOI: 10.1016/j.envres.2022.113444] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/28/2022] [Accepted: 05/04/2022] [Indexed: 06/15/2023]
Abstract
Antibacterial strategies based on reactive oxygen species (ROS) have opened up a new avenue for overcoming the great challenges of antibiotics topic including lack of broad-spectrum antibiotics and the emergence of super-resistant bacteria. Herein, we leveraged a strategy of constructing synergistic catalytic active sites to develop a simple yet efficient Fenton-like active nanocomposite, and investigated its catalysis mechanism and antibacterial performance thoroughly. This strategy provides a new direction for boosting the catalytic activity of nanocomposite catalysts for wide application. Specifically, by uniformly loading copper oxide and ceria onto the surface of silica nanocapsules (SiO2 NCs), we fabricated a bimetallic oxide nanocomposite Cu0.75Ce0.62O2@SiO2 NC, which performed superior Fenton-like capability in a wide pH range without additional exogenetic hydrogen peroxide (H2O2). Such excellent catalytic activity was originated from the charge interaction between the two metal oxide components, where formation of Cu+ and oxygen vacancies (OVs) was mutually reinforcing, resulting in a synergistic effect to produce H2O2 and catalyze the generation of •OH under the slight acid condition (pH = 6.0). In view of the outstanding Fenton-like activity, the Cu0.75Ce0.62O2@SiO2 NC was employed in antimicrobial testing, which demonstrated exceptional high in vitro antimicrobial efficacy against both the S. aureus and E. coli in a neutral environment (pH = 7.4). The excellent performance of the bimetallic nanocomposite Cu0.75Ce0.62O2@SiO2 NC, including its facile and mild preparation, high water-solubility and stability, superior catalytic and antimicrobial performances, manifests a promising broad-spectrum antibiotic that can be anticipated to deal with the contamination of the environment by bacteria.
Collapse
Affiliation(s)
- Yuxin Zhu
- State Key Laboratory of Crystal Materials, School of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Yue Zhao
- State Key Laboratory of Crystal Materials, School of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Xun Sun
- State Key Laboratory of Crystal Materials, School of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Fuhao An
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Lanya Jiao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Xuan Sun
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
| |
Collapse
|
25
|
Kong F, Chen S, Chen J, Liu C, Zhu W, Dickie DA, Schinski WL, Zhang S, Ess DH, Gunnoe TB. Cu(II) carboxylate arene C─H functionalization: Tuning for nonradical pathways. SCIENCE ADVANCES 2022; 8:eadd1594. [PMID: 36001664 PMCID: PMC9401614 DOI: 10.1126/sciadv.add1594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
We report carbon-hydrogen acetoxylation of nondirected arenes benzene and toluene, as well as related functionalization with pivalate and 2-ethylhexanoate ester groups, using simple copper(II) [Cu(II)] salts with over 80% yield. By changing the ratio of benzene and Cu(II) salts, 2.4% conversion of benzene can be reached. Combined experimental and computational studies results indicate that the arene carbon-hydrogen functionalization likely occurs by a nonradical Cu(II)-mediated organometallic pathway. The Cu(II) salts used in the reaction can be isolated, recycled, and reused with little change in reactivity. In addition, the Cu(II) salts can be regenerated in situ using oxygen and, after the removal of the generated water, the arene carbon-hydrogen acetoxylation and related esterification reactions can be continued, which leads to a process that enables recycling of Cu(II).
Collapse
Affiliation(s)
- Fanji Kong
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
| | - Shusen Chen
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84604, USA
| | - Junqi Chen
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
| | - Chang Liu
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
| | - Weihao Zhu
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
| | - Diane A. Dickie
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
| | | | - Sen Zhang
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
| | - Daniel H. Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84604, USA
| | - T. Brent Gunnoe
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
| |
Collapse
|
26
|
Jian J, Liao J, Zhou M, Yao M, Chen Y, Liang X, Liu C, Tong Q. Enhanced Photoelectrochemical Water Splitting of Black Silicon Photoanode with pH‐Dependent Copper‐Bipyridine Catalysts. Chemistry 2022; 28:e202201520. [DOI: 10.1002/chem.202201520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Jing‐Xin Jian
- Department of Chemistry Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention Shantou University Shantou Guangdong 515063 P. R. China
| | - Jia‐Xin Liao
- Department of Chemistry Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention Shantou University Shantou Guangdong 515063 P. R. China
| | - Mu‐Han Zhou
- Department of Chemistry Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention Shantou University Shantou Guangdong 515063 P. R. China
| | - Ming‐Ming Yao
- Department of Chemistry Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention Shantou University Shantou Guangdong 515063 P. R. China
| | - Yi‐Jing Chen
- Department of Chemistry Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention Shantou University Shantou Guangdong 515063 P. R. China
| | - Xi‐Wen Liang
- Department of Chemistry Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention Shantou University Shantou Guangdong 515063 P. R. China
| | - Chao‐Ping Liu
- Department of Physics Shantou University Shantou Guangdong 515063 P. R. China
| | - Qing‐Xiao Tong
- Department of Chemistry Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention Shantou University Shantou Guangdong 515063 P. R. China
| |
Collapse
|
27
|
Daugavet MA, Dobrynina MI, Shaposhnikova TG, Solovyeva AI, Mittenberg AG, Shabelnikov SV, Babkina IY, Grinchenko AV, Ilyaskina DV, Podgornaya OI. New putative phenol oxidase in ascidian blood cells. Sci Rep 2022; 12:14326. [PMID: 35995990 PMCID: PMC9395347 DOI: 10.1038/s41598-022-18283-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 08/09/2022] [Indexed: 11/13/2022] Open
Abstract
The phenol oxidase system is ancient and ubiquitously distributed in all living organisms. In various groups it serves for the biosynthesis of pigments and neurotransmitters (dopamine), defence reactions and tissue hardening. Ascidians belong to subphylum Tunicata, which is considered the closest living relative to Vertebrates. Two phenol oxidases previously described for ascidians are vertebrate-like and arthropod-like phenol oxidases. In our present study, we described a new ascidian protein, Tuphoxin, with putative phenol oxidase function, which bears no sequence similarity with two enzymes described previously. The closest related proteins to Tuphoxin are mollusc haemocyanins. Unlike haemocyanins, which are oxygen transporting plasma proteins, Tuphoxin is synthesised in ascidian blood cells and secreted in the extracellular matrix of the tunic—ascidian outer coverings. Single mature transcript coding for this phenol oxidase can give several protein products of different sizes. Thus limited proteolysis of the initial protein is suggested. A unique feature of Tuphoxins and their homologues among Tunicata is the presence of thrombospondin first type repeats (TSP1) domain in their sequence which is supposed to provide interaction with extracellular matrix. The finding of TSP1 in the structure of phenol oxidases is new and we consider this to be an innovation of Tunicata evolutionary lineage.
Collapse
Affiliation(s)
- M A Daugavet
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia.
| | - M I Dobrynina
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia
| | | | - A I Solovyeva
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia.,Zoological Institute of Russian Academy of Sciences, St. Petersburg, Russia
| | - A G Mittenberg
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia
| | - S V Shabelnikov
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia
| | - I Yu Babkina
- Saint-Petersburg State University, St. Petersburg, Russia
| | - A V Grinchenko
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Vladivostok, Russia
| | - D V Ilyaskina
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Vladivostok, Russia.,Vrije Universiteit Amsterdam, 1081 HV, Amsterdam, The Netherlands
| | - O I Podgornaya
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia.,Saint-Petersburg State University, St. Petersburg, Russia
| |
Collapse
|
28
|
Li R, Khan FST, Tapia M, Hematian S. Oxygenation of copper(I) complexes containing fluorine tagged tripodal tetradentate chelates: significant ligand electronic effects. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2107429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Runzi Li
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Firoz Shah Tuglak Khan
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Marcos Tapia
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Shabnam Hematian
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| |
Collapse
|
29
|
Borrego E, Tiessler-Sala L, Lázaro JJ, Caballero A, Pérez PJ, Lledós A. Direct Benzene Hydroxylation with Dioxygen Induced by Copper Complexes: Uncovering the Active Species by DFT Calculations. Organometallics 2022; 41:1892-1904. [PMID: 35936655 PMCID: PMC9344391 DOI: 10.1021/acs.organomet.2c00202] [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] [Indexed: 11/30/2022]
Abstract
![]()
The direct oxidation of benzene into phenol using molecular
oxygen
at very mild temperatures can be promoted in the presence of the copper
complex TpBr3Cu(NCMe) in the homogeneous phase in the presence
of ascorbic acid as the source of protons and electrons. The stoichiometric
nature, relative to copper, of this transformation prompted a thorough
DFT study in order to understand the reaction pathway. As a result,
the dinuclear species TpBr3CuII(μ-O•)(μ-OH)CuIITpBr3 is proposed
as the relevant structure which is responsible for activating the
arene C–H bond leading to phenol formation.
Collapse
Affiliation(s)
- Elena Borrego
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de Química, Universidad de Huelva, Huelva 21007, Spain
| | - Laura Tiessler-Sala
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del
Vallès, Barcelona 08193, Spain
| | - Jesus J. Lázaro
- Cepsa Research Center, Compañía Española de Petróleos S.A., Alcalá de Henares, Madrid 28850, Spain
| | - Ana Caballero
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de Química, Universidad de Huelva, Huelva 21007, Spain
| | - Pedro J. Pérez
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de Química, Universidad de Huelva, Huelva 21007, Spain
| | - Agustí Lledós
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del
Vallès, Barcelona 08193, Spain
| |
Collapse
|
30
|
Schneider R, Engesser TA, Näther C, Krossing I, Tuczek F. Copper‐Catalyzed Monooxygenation of Phenols: Evidence for a Mononuclear Reaction Mechanism. Angew Chem Int Ed Engl 2022; 61:e202202562. [PMID: 35344617 PMCID: PMC9323449 DOI: 10.1002/anie.202202562] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Indexed: 11/17/2022]
Abstract
The CuI salts [Cu(CH3CN)4]PF and [Cu(oDFB)2]PF with the very weakly coordinating anion Al(OC(CF3)3)4− (PF) as well as [Cu(NEt3)2]PF comprising the unique, linear bis‐triethylamine complex [Cu(NEt3)2]+ were synthesized and examined as catalysts for the conversion of monophenols to o‐quinones. The activities of these CuI salts towards monooxygenation of 2,4‐di‐tert‐butylphenol (DTBP‐H) were compared to those of [Cu(CH3CN)4]X salts with “classic” anions (BF4−, OTf−, PF6−), revealing an anion effect on the activity of the catalyst and a ligand effect on the reaction rate. The reaction is drastically accelerated by employing CuII‐semiquinone complexes as catalysts, indicating that formation of a CuII complex precedes the actual catalytic cycle. This result and other experimental observations show that with these systems the oxygenation of monophenols does not follow a dinuclear, but a mononuclear pathway analogous to that of topaquinone cofactor biosynthesis in amine oxidase.
Collapse
Affiliation(s)
- Rebecca Schneider
- Institut für Anorganische Chemie Christian-Albrechts-Universität zu Kiel Max-Eyth-Straße 2 24118 Kiel Germany
| | - Tobias A. Engesser
- Institut für Anorganische Chemie Christian-Albrechts-Universität zu Kiel Max-Eyth-Straße 2 24118 Kiel Germany
| | - Christian Näther
- Institut für Anorganische Chemie Christian-Albrechts-Universität zu Kiel Max-Eyth-Straße 2 24118 Kiel Germany
| | - Ingo Krossing
- Institut für Anorganische und Analytische Chemie Albert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg Germany
| | - Felix Tuczek
- Institut für Anorganische Chemie Christian-Albrechts-Universität zu Kiel Max-Eyth-Straße 2 24118 Kiel Germany
| |
Collapse
|
31
|
Lohmiller T, Spyra CJ, Dechert S, Demeshko S, Bill E, Schnegg A, Meyer F. Antisymmetric Spin Exchange in a μ-1,2-Peroxodicopper(II) Complex with an Orthogonal Cu-O-O-Cu Arrangement and S = 1 Spin Ground State Characterized by THz-EPR. JACS AU 2022; 2:1134-1143. [PMID: 35647586 PMCID: PMC9131480 DOI: 10.1021/jacsau.2c00139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/08/2022] [Accepted: 04/11/2022] [Indexed: 06/15/2023]
Abstract
A unique type of Cu2/O2 adduct with orthogonal (close to 90°) Cu-O-O-Cu arrangement has been proposed for initial stages of O2 binding at biological type III dicopper sites, and targeted ligand design has now allowed us to emulate such an adduct in a pyrazolate-based μ-η1 :η1-peroxodicopper(II) complex (2) with Cu-O-O-Cu torsion φ of 87°, coined ⊥ P intermediate. Full characterization of 2, including X-ray diffraction (d O-O = 1.452 Å) and Raman spectroscopy (ν̃O-O = 807 cm-1), completes a series of closely related Cu2/O2 intermediates featuring μ-η1 :η1-peroxodicopper(II) cores with φ ranging from 55° (A, cis-peroxo C P; Brinkmeier A.et al., J. Am. Chem. Soc.2021, 143, 10361) via 87° (2, ⊥ P type) up to 104° (B, approaching trans-peroxo T P; Kindermann N.et al., Angew. Chem., Int. Ed.2015, 54, 1738). SQUID magnetometry revealed ferromagnetic interaction of the CuII ions and a triplet (S t = 1) ground state in 2. Frequency-domain THz-EPR has been employed to quantitatively investigate the spin systems of 2 and B. Magnetic transitions within the triplet ground states confirmed their substantial zero-field splittings (ZFS) suggested by magnetometry. Formally forbidden triplet-to-singlet transitions at 56 (2) and 157 cm-1 (B), which are in agreement with the exchange coupling strengths J iso inferred from SQUID data, are reported for the first time for coupled dicopper(II) complexes. Rigorous analysis by spin-Hamiltonian-based simulations attributed the corresponding nonzero transition probabilities and the ZFS to substantial antisymmetric (Dzyaloshinskii-Moriya) exchange d and provided robust values and orientations for the d , J , and g tensors. These interactions can be correlated with the Cu-O-O-Cu geometries, revealing a linear increase of J iso with the Cu-O-O-Cu torsion and a strong linear decrease with the Cu-O-O angle. Relevance of the ⊥ P intermediate for O2 activation at type III dicopper sites and a potential role of antisymmetric exchange in the concomitant intersystem crossing are proposed.
Collapse
Affiliation(s)
- Thomas Lohmiller
- EPR4Energy
Joint Lab, Department Spins in Energy Conversion and Quantum Information
Science, Helmholtz Zentrum Berlin für
Materialien und Energie GmbH, Albert-Einstein-Straße 16, 12489 Berlin, Germany
| | - Can-Jerome Spyra
- University
of Göttingen, Institute of Inorganic Chemistry, Tamannstrasse 4, D-37077 Göttingen, Germany
| | - Sebastian Dechert
- University
of Göttingen, Institute of Inorganic Chemistry, Tamannstrasse 4, D-37077 Göttingen, Germany
| | - Serhiy Demeshko
- University
of Göttingen, Institute of Inorganic Chemistry, Tamannstrasse 4, D-37077 Göttingen, Germany
| | - Eckhard Bill
- Max
Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim an der
Ruhr, Germany
| | - Alexander Schnegg
- Max
Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim an der
Ruhr, Germany
| | - Franc Meyer
- University
of Göttingen, Institute of Inorganic Chemistry, Tamannstrasse 4, D-37077 Göttingen, Germany
- University
of Göttingen, International Center for Advanced Studies of
Energy Conversion (ICASEC), D-37077 Göttingen, Germany
| |
Collapse
|
32
|
Xiong G, Huang L, Gong Z, Wang C, Chen Y. Synthesis of
β
‐Keto Sulfoxides via Copper(II)‐Catalyzed Aerobic Oxidation. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Guowei Xiong
- School of Chemistry and Environmental Engineering, Key Laboratory of Green Chemical Process Ministry of Education Wuhan Institute of Technology Wuhan 430205 People's Republic of China
| | - Liangfeng Huang
- School of Chemistry and Environmental Engineering, Key Laboratory of Green Chemical Process Ministry of Education Wuhan Institute of Technology Wuhan 430205 People's Republic of China
| | - Zhang Gong
- School of Chemistry and Environmental Engineering, Key Laboratory of Green Chemical Process Ministry of Education Wuhan Institute of Technology Wuhan 430205 People's Republic of China
| | - Can Wang
- School of Chemistry and Environmental Engineering, Key Laboratory of Green Chemical Process Ministry of Education Wuhan Institute of Technology Wuhan 430205 People's Republic of China
| | - Yunfeng Chen
- School of Chemistry and Environmental Engineering, Key Laboratory of Green Chemical Process Ministry of Education Wuhan Institute of Technology Wuhan 430205 People's Republic of China
| |
Collapse
|
33
|
Nayek A, Ahmed ME, Samanta S, Dinda S, Patra S, Dey SG, Dey A. Bioinorganic Chemistry on Electrodes: Methods to Functional Modeling. J Am Chem Soc 2022; 144:8402-8429. [PMID: 35503922 DOI: 10.1021/jacs.2c01842] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
One of the major goals of bioinorganic chemistry has been to mimic the function of elegant metalloenzymes. Such functional modeling has been difficult to attain in solution, in particular, for reactions that require multiple protons and multiple electrons (nH+/ne-). Using a combination of heterogeneous electrochemistry, electrode and molecule design one may control both electron transfer (ET) and proton transfer (PT) of these nH+/ne- reactions. Such control can allow functional modeling of hydrogenases (H+ + e- → 1/2 H2), cytochrome c oxidase (O2 + 4 e- + 4 H+ → 2 H2O), monooxygenases (RR'CH2 + O2 + 2 e- + 2 H+ → RR'CHOH + H2O) and dioxygenases (S + O2 → SO2; S = organic substrate) in aqueous medium and at room temperatures. In addition, these heterogeneous constructs allow probing unnatural bioinspired reactions and estimation of the inner- and outer-sphere reorganization energy of small molecules and proteins.
Collapse
Affiliation(s)
- Abhijit Nayek
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A Raja SC Mullick Road, Kolkata, WB India 700032
| | - Md Estak Ahmed
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A Raja SC Mullick Road, Kolkata, WB India 700032
| | - Soumya Samanta
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A Raja SC Mullick Road, Kolkata, WB India 700032
| | - Souvik Dinda
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A Raja SC Mullick Road, Kolkata, WB India 700032
| | - Suman Patra
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A Raja SC Mullick Road, Kolkata, WB India 700032
| | - Somdatta Ghosh Dey
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A Raja SC Mullick Road, Kolkata, WB India 700032
| | - Abhishek Dey
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A Raja SC Mullick Road, Kolkata, WB India 700032
| |
Collapse
|
34
|
Monika, Ansari A. Effect of the ring size of TMC ligands in controlling C-H bond activation by metal-superoxo species. Dalton Trans 2022; 51:5878-5889. [PMID: 35347335 DOI: 10.1039/d2dt00491g] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Metal-superoxo species play a very important role in many metal-mediated catalytic transformation reactions. Their catalytic reactivity is affected by many factors such as the nature of metal ions and ring size of ligands. Herein, for the first time, we report DFT calculations on the electronic structures of a series of metal-superoxo species (M = V, Cr, Mn, Fe, and Co) with two ring size ligands, i.e., 13-TMC/14-TMC, and a detailed mechanistic study on the C-H bond activation of cyclohexa-1,4-diene followed by the effect of the ring size of ligands. Our DFT results showed that the electron density at the distal oxygen plays an important role in C-H bond activation. By computing the energetics of C-H bond activation and mapping the potential energy surface, it was found that the initial hydrogen abstraction is the rate-determining step with both TMC rings and all the studied metal-superoxo species. The significant electron density at the cyclohex-1,4-diene carbon indicates that the reaction proceeds via the proton-coupled electron transfer mechanism. By mapping the potential energy surfaces, we found that the 13-TMC ligated superoxo with the anti-isomer are more reactive than the 14-TMC superoxo species except for the iron-superoxo species where the 14-TMC ligated superoxo species is more reactive i.e. smaller ring size TMC is more reactive towards C-H bond activation. This is also supported by the structural correlation, i.e., the greater contraction in the smaller ring results in the metal being pushed out of plane along the z-axis, which reduces the steric hindrance. Thus, the ring size can help in designing catalysts with better efficiency for catalytic reactions.
Collapse
Affiliation(s)
- Monika
- Department of Chemistry, Central University of Haryana, India, 123031.
| | - Azaj Ansari
- Department of Chemistry, Central University of Haryana, India, 123031.
| |
Collapse
|
35
|
Exploring the Potential of Water-Soluble Cu(II) Complexes with MPA–CdTe Quantum Dots for Photoinduced Electron Transfer. Catalysts 2022. [DOI: 10.3390/catal12040422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Three water-soluble copper complexes based on the amine/pyridine functionalities were investigated, along with quantum dots, as a catalyst–photosensitizer assembly, respectively, for fundamental understanding of photoinduced electron transfer. Luminescence quenching and lifetime measurements were performed to try and establish the actual process that leads to the quenching, such as electron transfer, energy transfer, or complex formation (static quenching). Cyclic voltammetry and dynamic light scattering experiments were also performed. Irrespective of the similar reduction potentials of the three complexes, very different photoluminescence properties were observed.
Collapse
|
36
|
Theoretical perspective on mononuclear copper-oxygen mediated C–H and O–H activations: A comparison between biological and synthetic systems. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63974-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
37
|
San Esteban ACM, Kuwamura N, Yoshinari N, Konno T. Serendipitous formation of oxygen-bridged CuII6M (M = Mn II, Co II) double cubanes showing electrocatalytic water oxidation. Chem Commun (Camb) 2022; 58:4192-4195. [PMID: 35274119 DOI: 10.1039/d1cc07199h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydroxido-bridged CuII6M double-cubane clusters (M = MnII, CoII) supported by D-penicillaminedisulfide were unexpectedly formed by treating a D-penicillaminato CuII2PtII2 complex with MBr2 in water. The clusters displayed heterogeneous electrocatalytic activities for water oxidation dependent on the central M shared by two CuII cubane units.
Collapse
Affiliation(s)
| | - Naoto Kuwamura
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
| | - Nobuto Yoshinari
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
| | - Takumi Konno
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
| |
Collapse
|
38
|
Schneider R, Engesser TA, Näther C, Krossing I, Tuczek F. Copper‐Catalyzed Monooxygenation of Phenols: Evidence for a Mononuclear Reaction Mechanism. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Rebecca Schneider
- Christian-Albrechts-Universität zu Kiel: Christian-Albrechts-Universitat zu Kiel Institute for Inorganic Chemistry Max-Eyth-Straße 2 24118 Kiel GERMANY
| | - Tobias A. Engesser
- Christian-Albrechts-Universitat zu Kiel Institut für Anorganische Chemie Otto-Hahn-Platz 10 24118 Kiel GERMANY
| | - Christian Näther
- Christian-Albrechts-Universität zu Kiel: Christian-Albrechts-Universitat zu Kiel Institute for Inorganic Chemistry Max-Eyth-Straße 2 24118 Kiel GERMANY
| | - Ingo Krossing
- University of Freiburg: Albert-Ludwigs-Universitat Freiburg Institute for Inorganic and Analytical Chemistry Albertstr. 21 79104 Freiburg i. Br. GERMANY
| | - Felix Tuczek
- Christian-Albrechts-Universität zu Kiel: Christian-Albrechts-Universitat zu Kiel Institute for Inorganic Chemistry Max-Eyth-Straße 2 24118 Kiel GERMANY
| |
Collapse
|
39
|
Ghosh B, Banerjee A, Roy L, Manna RN, Nath R, Paul A. The Role of Copper Salts and O
2
in the Mechanism of C≡N Bond Activation for Facilitating Nitrogen Transfer Reactions**. Angew Chem Int Ed Engl 2022; 61:e202116868. [DOI: 10.1002/anie.202116868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Indexed: 11/12/2022]
Affiliation(s)
- Boyli Ghosh
- School of Chemical Sciences Indian Association for the Cultivation of Science 2A & 2B, Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Ambar Banerjee
- Department of Physics Stockholm University Frescativägen 11419 Stockholm Sweden
| | - Lisa Roy
- Institute of Chemical Technology Mumbai – IOC Odisha Campus Bhubaneswar IIT Kharagpur Extension Centre Bhubaneswar 751013 India
| | - Rabindra Nath Manna
- School of Chemical Sciences Indian Association for the Cultivation of Science 2A & 2B, Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Rounak Nath
- School of Chemical Sciences Indian Association for the Cultivation of Science 2A & 2B, Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Ankan Paul
- School of Chemical Sciences Indian Association for the Cultivation of Science 2A & 2B, Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| |
Collapse
|
40
|
Renault A, Joucla L, Lacote E. Catalytic Aerobic Oxidation of Hydrazines into 2‐Tetrazenes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anne Renault
- UCBL 1: Universite Claude Bernard Lyon 1 LHCEP FRANCE
| | - Lionel Joucla
- UCBL 1: Universite Claude Bernard Lyon 1 LHCEP FRANCE
| | - Emmanuel Lacote
- CNRS-Université de Lyon C2P2 43 bd du 11 novembre 1918 69616 Villeurbanne FRANCE
| |
Collapse
|
41
|
Kamboj N, Mali G, Lama P, Erande RD, Metre RK. Designing a Redox Noninnocent Phenalenyl-Based Copper(II) Complex: An Autotandem Catalyst for the Selective Oxidation of Polycyclic Aromatic Hydrocarbons (PAHs). ACS OMEGA 2022; 7:8789-8797. [PMID: 35309439 PMCID: PMC8928492 DOI: 10.1021/acsomega.1c07051] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 02/18/2022] [Indexed: 05/25/2023]
Abstract
A square-planar [CuIIL] complex 1, based on the redox-active phenalenyl unit LH2 = 9,9'-(ethane-1,2-diylbis(azanediyl))bis(1H-phenalen-1-one), is prepared and structurally characterized by single-crystal X-ray diffraction analysis. Complex 1 crystallizes at room temperature with the P1 space group. The molecular structure of 1 reveals the presence of intriguing C-H···Cu intermolecular anagostic interactions of the order ∼2.7715 Å. Utilizing the presence of anagostic interactions and the free nonbonding molecular orbitals (NBMOs) of the closed-shell phenalenyl unit in 1, the oxidation reactions of some industrially important polycyclic aromatic hydrocarbons (PAHs) in the presence of the [CuIIL] complex under very mild conditions have been reported. The direct conversion of anthracene-9-carbaldehyde to 9,10-anthraquinone in one step concludes that the catalyst shows dual activity in the chemical transformations. This also includes the first report of a "single-step" catalytic transformation of pyrene-1-carbaldehyde to the synthetically difficult pyren-4-ol, a precursor for the synthesis of several novel fluorescent probes for cell imaging.
Collapse
Affiliation(s)
- Nisha Kamboj
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, Rajasthan, India
| | - Ghanshyam Mali
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, Rajasthan, India
| | - Prem Lama
- CSIR-Indian
Institute of Petroleum, Haridwar Road, Mokhampur, Dehradun 248005, India
| | - Rohan D. Erande
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, Rajasthan, India
| | - Ramesh K. Metre
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, Rajasthan, India
| |
Collapse
|
42
|
Structural diversity of copper(II) complexes with three dimensional network: Crystal structure, Hirshfeld surface analysis, DFT calculations and catalytic activity. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115633] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
43
|
Kang P, Lin BL, Large TAG, Ainsworth J, Wasinger EC, Stack TDP. Phenolate-bonded bis(μ-oxido)-bis-copper(III) intermediates: hydroxylation and dehalogenation reactivities. Faraday Discuss 2022; 234:86-108. [PMID: 35156114 DOI: 10.1039/d1fd00071c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Exogenous phenolate ortho-hydroxylation by copper oxidants formed from dioxygen is generally thought to occur through one of two limiting mechanisms defined by the structure of the active oxidant: an electrophilic μ-η2:η2-peroxo-bis-copper(II) species as found in the oxygenated form of the binuclear copper enzyme tyrosinase (oxyTyr), or an isomeric bis(μ-oxido)-bis-copper(III) species (O) with ligated phenolate(s) as evidenced by most synthetic systems. The characterization of the latter is limited due to their limited thermal stability. This study expands the scope of an O species with ligated phenolate(s) using N,N'-di-tert-butyl-1,3-propanediamine (DBPD), a flexible secondary diamine ligand. Oxygenation of the [(DBPD)Cu(I)]1+ complex at low temperatures (e.g., 153 K) forms a spectroscopically and structurally faithful model to oxyTyr, a side-on peroxide intermediate, which reacts with added phenolates to form a bis(μ-oxido)-bis-copper(III) species with ligated phenolates, designated as an A species. The proposed stoichiometry of A is best understood as possessing 2 rather than 1 bonded phenolate. Thermal decomposition of A results in regiospecific phenolate ortho-hydroxylation with the ortho-substituent as either a C-H or C-X (Cl, Br) group, though the halogen displacement is significantly slower. DFT and experimental studies support an electrophilic attack of an oxide ligand into the π-system of a ligated phenolate. This study supports a hydroxylation mechanism in which O-O bond cleavage of the initially formed peroxide by phenolate ligation, which precedes phenolate aromatic hydroxylation.
Collapse
Affiliation(s)
- Peng Kang
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Bo-Lin Lin
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Tao A G Large
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Jasper Ainsworth
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Erik C Wasinger
- Department of Chemistry and Biochemistry, California State University, Chico, California 95929, USA.
| | - T Daniel P Stack
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| |
Collapse
|
44
|
Ghosh B, Banerjee A, Roy L, Manna RN, Nath R, Paul A. The Role of Copper Salts and O
2
in the Mechanism of C≡N Bond Activation for Facilitating Nitrogen Transfer Reactions**. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202116868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Boyli Ghosh
- School of Chemical Sciences Indian Association for the Cultivation of Science 2A & 2B, Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Ambar Banerjee
- Department of Physics Stockholm University Frescativägen 11419 Stockholm Sweden
| | - Lisa Roy
- Institute of Chemical Technology Mumbai – IOC Odisha Campus Bhubaneswar IIT Kharagpur Extension Centre Bhubaneswar 751013 India
| | - Rabindra Nath Manna
- School of Chemical Sciences Indian Association for the Cultivation of Science 2A & 2B, Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Rounak Nath
- School of Chemical Sciences Indian Association for the Cultivation of Science 2A & 2B, Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Ankan Paul
- School of Chemical Sciences Indian Association for the Cultivation of Science 2A & 2B, Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| |
Collapse
|
45
|
Richezzi M, Ferreyra J, Puzzolo J, Milesi L, Palopoli CM, Moreno DM, Hureau C, Signorella SR. Versatile Activity of a Copper(II) Complex Bearing a N4‐Tetradentate Schiff Base Ligand with Reduced Oxygen Species. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202101042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Micaela Richezzi
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Joaquín Ferreyra
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Juan Puzzolo
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Lisandro Milesi
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Claudia M. Palopoli
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Diego M. Moreno
- Universidad Nacional de Rosario Facultad de Ciencias Bioquimicas y Farmaceuticas Química Física ARGENTINA
| | - Christelle Hureau
- CNRS: Centre National de la Recherche Scientifique LCC - Laboratoire de Chimie de Coordination FRANCE
| | | |
Collapse
|
46
|
Chen CY, Tsai ML. Tris(Imidazolyl) Dicopper(I) Complex and its Reactivity to Exert Catalytic Oxidation of Sterically Hindered Phenol Substrates via a [Cu2O]2+ Core. Dalton Trans 2022; 51:2428-2443. [DOI: 10.1039/d1dt04084g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Cu ion ligated with histidine residues is a common active site motif of various Cu-containing metalloenzymes exerting versatile catalytic oxidation reactions. Due to the scarce of structurally characterized biomimetic...
Collapse
|
47
|
Li S, Tian D, Zhao X, Yin Y, Lee R, Jiang Z. Visible light-driven copper( ii) catalyzed aerobic oxidative cleavage of carbon–carbon bonds: a combined experimental and theoretical study. Org Chem Front 2022. [DOI: 10.1039/d2qo01264b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By switching on visible blue light, aerobic oxidation of various substrates, such as α-substituted, β-substituted and α-halo styrenes, was first realized with a copper(ii) catalyst.
Collapse
Affiliation(s)
- Sanliang Li
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Dong Tian
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Xiaowei Zhao
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
| | - Yanli Yin
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, P. R. China
| | - Richmond Lee
- School of Chemistry and Molecular Bioscience and Molecular Horizons, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia
| | - Zhiyong Jiang
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province, Henan University, Kaifeng, Henan, 475004, P. R. China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, P. R. China
| |
Collapse
|
48
|
Shanmugam M, Kumar P, Sen A, Rajaraman G. An Unusual Mixed Valent Cobalt Dimer as a Catalyst for Anti-Markovnikov Hydrophophination of Alkynes. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00112h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of [Co(PMe3)4] (1) with a redox-active NNN pincer ligand (L1) led us to isolate a unique binuclear cobalt complex ([(PMe3)2CoII(L13-)CoI(PMe3)3] (2)) anchored by a three electron reduced L1...
Collapse
|
49
|
Muley A, Karumban KS, Kumbhakar S, Giri B, Maji S. High phenoxazinone synthase activity of two mononuclear cis-dichloro cobalt( ii) complexes with a rigid pyridyl scaffold. NEW J CHEM 2022. [DOI: 10.1039/d1nj03992j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Two mononuclear cis-dichloro cobalt(II) complexes with bidentate pyridyl ligands have been successfully synthesized and employed as active o-aminophenol oxidation catalysts resulting in high turnover numbers under aerobic conditions.
Collapse
Affiliation(s)
- Arabinda Muley
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India
| | - Kalai Selvan Karumban
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India
| | - Sadananda Kumbhakar
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India
| | - Bishnubasu Giri
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India
| | - Somnath Maji
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India
| |
Collapse
|
50
|
Patra BN, Ghosh P, Sepay N, Gayen S, Koner S, Brandao P, Lin Z, Debnath R, Pratihar JL, Maity T, Mal D. Aerobic epoxidation of olefins by carboxylate ligand‐based cobalt (II) compound: synthesis, X‐ray crystallography, and catalytic exploration. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Pameli Ghosh
- Department of Chemistry Jadavpur University Kolkata India
| | - Nayim Sepay
- Department of Chemistry Lady Brabourne College Kolkata India
| | - Saikat Gayen
- Department of Chemistry Jadavpur University Kolkata India
| | | | - Paula Brandao
- Department of Chemistry, CICECO University of Aveiro Aveiro Portugal
| | - Zhi Lin
- Department of Chemistry, CICECO University of Aveiro Aveiro Portugal
| | - Rakesh Debnath
- Department of Chemistry Jadavpur University Kolkata India
| | | | - Tanmay Maity
- Solid State and Structural Chemistry unit Indian Institute of Science Bangalore India
| | - Dasarath Mal
- Department of Chemistry Vijaygarh Jyotish Ray College Kolkata India
| |
Collapse
|