1
|
He N, Nakatani N, Hada M. How does multi-reference computation change the catalysis chemistry? DFT and CASPT2 studies of the Cu-catalysed coupling reactions between aryl iodides and β-diketones. Phys Chem Chem Phys 2023; 25:28871-28884. [PMID: 37853798 DOI: 10.1039/d3cp03418f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
The molecular mechanism of a Cu-catalysed coupling reaction was theoretically studied using density functional theory (DFT) and the complete active space self-consistent field method followed by the second-order perturbation theory (CASSCF/CASPT2) to investigate the effects of the strong electron correlation of the Cu centre on the reaction profile. Both DFT and CASSCF/CASPT2 calculations showed that the catalytic cycle proceeds via an oxidative addition (OA) reaction, followed by a reductive elimination (RE) reaction, where OA is the rate-determining step. Although the DFT-calculated activation energies of the OA and RE steps are highly dependent on the choice of functionals, the CASSCF/CASPT2 results are less affected by the choice of DFT-optimised geometries. Therefore, with a careful assessment based on the CASSCF/CASPT2 single-point energy evaluation, an optimal choice of the DFT geometry is of good qualitative use for energetics at the CASPT2 level of theory. Based on the changes in the electron populations of the 3d orbitals during the OA and RE steps, the characteristic features of the DFT-calculated electronic structure were qualitatively consistent with those calculated using the CASSCF method. Further electronic structure analysis by the natural orbital occupancy of the CASSCF wavefunction showed that the ground state is almost single-reference in this system and the strong electron correlation effect of the Cu centre can be dealt with using the MP2 or CCSD method, too. However, the slightly smaller occupation numbers of the 3dπ orbital in the course of reactions suggested that the electron correlation effect of the Cu(III) centre appears through the interaction between the 3dπ orbital and the C-I antibonding σ* orbital in the OA step, and between the 3dπ orbital and the Cu-C antibonding σ* orbital in the RE step.
Collapse
Affiliation(s)
- Nan He
- Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan.
| | - Naoki Nakatani
- Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan.
| | - Masahiko Hada
- Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan.
| |
Collapse
|
2
|
Buchhorn M, Krewald V. The π-interactions of ammonia ligands evaluated by ab initio ligand field theory. Dalton Trans 2023; 52:6685-6692. [PMID: 37128808 DOI: 10.1039/d3dt00511a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Ammonia and amine ligands are commonly assumed to be σ-only ligands in coordination chemistry, i.e. they are not expected to interact significantly with a metal via a π path. Ligand field analyses employing the Angular Overlap Model resulted in good fits to experimental data without a π parameter for ammonia ligands, thereby supporting this assumption. In this work, we challenge this assumption and suggest that it is an oversimplification. We use complete active space calculations for electronic structure analyses of copper ammine complexes that are in good agreement with the transitions observed in experimental UV-vis spectra. These findings lead to a reinterpretation of the experimental spectra that necessitates a significant π interaction of the ammonia ligands. The strength of the ammonia π interaction is evaluated by parameterizing the ligand field splittings of a series of metal hexammine complexes ([M(NH3)6]n+ with M = Cr, Mn, Fe, Co, Ni, Ru, Os and n = 2, 3) and selected tetrammine complexes ([M(NH3)4]n+ with M = Cr, Mn, Fe, Co, Ni and n = 2 or 3) with the Angular Overlap Model. The resulting π parameters show that ammonia is a π donor of similar strength as chloride.
Collapse
Affiliation(s)
- Moritz Buchhorn
- TU Darmstadt, Department of Chemistry, Theoretical Chemistry, Alarich-Weiss-Straße 4, 64287 Darmstadt, Germany.
| | - Vera Krewald
- TU Darmstadt, Department of Chemistry, Theoretical Chemistry, Alarich-Weiss-Straße 4, 64287 Darmstadt, Germany.
| |
Collapse
|
3
|
Yang S, An H, Anastasiadou D, Xu W, Wu L, Wang H, de Ruiter J, Arnouts S, Figueiredo MC, Bals S, Altantzis T, van der Stam W, Weckhuysen BM. Waste-Derived Copper-Lead Electrocatalysts for CO 2 Reduction. ChemCatChem 2022; 14:e202200754. [PMID: 36588984 PMCID: PMC9796115 DOI: 10.1002/cctc.202200754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 06/27/2022] [Indexed: 02/01/2023]
Abstract
It remains a real challenge to control the selectivity of the electrocatalytic CO2 reduction (eCO2R) reaction to valuable chemicals and fuels. Most of the electrocatalysts are made of non-renewable metal resources, which hampers their large-scale implementation. Here, we report the preparation of bimetallic copper-lead (CuPb) electrocatalysts from industrial metallurgical waste. The metal ions were extracted from the metallurgical waste through simple chemical treatment with ammonium chloride, and CuxPby electrocatalysts with tunable compositions were fabricated through electrodeposition at varying cathodic potentials. X-ray spectroscopy techniques showed that the pristine electrocatalysts consist of Cu0, Cu1+ and Pb2+ domains, and no evidence for alloy formation was found. We found a volcano-shape relationship between eCO2R selectivity toward two electron products, such as CO, and the elemental ratio of Cu and Pb. A maximum Faradaic efficiency towards CO was found for Cu9.00Pb1.00, which was four times higher than that of pure Cu, under the same electrocatalytic conditions. In situ Raman spectroscopy revealed that the optimal amount of Pb effectively improved the reducibility of the pristine Cu1+ and Pb2+ domains to metallic Cu and Pb, which boosted the selectivity towards CO by synergistic effects. This work provides a framework of thinking to design and tune the selectivity of bimetallic electrocatalysts for CO2 reduction through valorization of metallurgical waste.
Collapse
Affiliation(s)
- Shuang Yang
- Inorganic Chemistry and CatalysisDebye Institute for Nanomaterials ScienceUtrecht University3584 CGUtrecht (TheNetherlands
| | - Hongyu An
- Inorganic Chemistry and CatalysisDebye Institute for Nanomaterials ScienceUtrecht University3584 CGUtrecht (TheNetherlands
| | - Dimitra Anastasiadou
- Laboratory of Inorganic Materials and CatalysisDepartment of Chemical Engineering and ChemistryEindhoven University of Technology5600 MBEindhoven (TheNetherlands
| | - Wenjie Xu
- National Synchrotron Radiation LaboratoryCAS Center for Excellence in NanoscienceUniversity of Science and Technology of ChinaHefei230029P. R. China
| | - Longfei Wu
- Inorganic Chemistry and CatalysisDebye Institute for Nanomaterials ScienceUtrecht University3584 CGUtrecht (TheNetherlands
| | - Hui Wang
- Inorganic Chemistry and CatalysisDebye Institute for Nanomaterials ScienceUtrecht University3584 CGUtrecht (TheNetherlands
| | - Jim de Ruiter
- Inorganic Chemistry and CatalysisDebye Institute for Nanomaterials ScienceUtrecht University3584 CGUtrecht (TheNetherlands
| | - Sven Arnouts
- Electron Microscopy for Materials Science (EMAT)University of Antwerp2020AntwerpBelgium,Applied Electrochemistry and Catalysis (ELCAT)University of AntwerpAntwerpen2610 WilrijkBelgium
| | - Marta C. Figueiredo
- Laboratory of Inorganic Materials and CatalysisDepartment of Chemical Engineering and ChemistryEindhoven University of Technology5600 MBEindhoven (TheNetherlands
| | - Sara Bals
- Electron Microscopy for Materials Science (EMAT)University of Antwerp2020AntwerpBelgium
| | - Thomas Altantzis
- Applied Electrochemistry and Catalysis (ELCAT)University of AntwerpAntwerpen2610 WilrijkBelgium
| | - Ward van der Stam
- Inorganic Chemistry and CatalysisDebye Institute for Nanomaterials ScienceUtrecht University3584 CGUtrecht (TheNetherlands
| | - Bert M. Weckhuysen
- Inorganic Chemistry and CatalysisDebye Institute for Nanomaterials ScienceUtrecht University3584 CGUtrecht (TheNetherlands
| |
Collapse
|
4
|
Nain S, Khurana R, Ali ME. Harnessing Colossal Magnetic Anisotropy in Sandwiched 3d 2-Metallocenes. J Phys Chem A 2022; 126:2811-2817. [PMID: 35507013 DOI: 10.1021/acs.jpca.2c01605] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Single-molecule magnets are gaining attention in recent years with the growing focus on achieving higher barriers of magnetization reversal. Metallocenes, owing to their unique sandwiched structure, assure themselves as plausible molecular systems for the development of novel single-molecule magnets (SMMs). Here in this work, we have explicitly investigated metallocenes of first-row transition elements, along with their one-electron-oxidized (cationic) and -reduced (anionic) analogues, for their magnetic anisotropies by adopting multireference ab initio calculations. Herein, we report a high magnetic anisotropy for 3d2 systems among all 3d-metallocenes.
Collapse
Affiliation(s)
- Sakshi Nain
- Institute of Nano Science and Technology, Sector-81, Mohali 140306, Punjab, India
| | - Rishu Khurana
- Institute of Nano Science and Technology, Sector-81, Mohali 140306, Punjab, India
| | - Md Ehesan Ali
- Institute of Nano Science and Technology, Sector-81, Mohali 140306, Punjab, India
| |
Collapse
|
5
|
Zhou C, Wu D, Gagliardi L, Truhlar DG. Calculation of the Zeeman Effect for Transition-Metal Complexes by Multiconfiguration Pair-Density Functional Theory. J Chem Theory Comput 2021; 17:5050-5063. [PMID: 34338523 DOI: 10.1021/acs.jctc.1c00208] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Spin-orbit coupling is especially critical for the description of magnetic anisotropy, electron paramagnetic resonance spectroscopy of inorganic radicals and transition-metal complexes, and intersystem crossing. Here, we show how spin-orbit coupling may be included in multiconfiguration pair-density functional theory (MC-PDFT), and we apply the resulting formulation to the calculation of magnetic g tensors (which govern the Zeeman effect) of molecules containing transition metals. MC-PDFT is an efficient method for including static and dynamic electronic correlation in the quantum mechanical treatment of molecules; here, we apply it with spin-orbit coupling by using complete active space self-consistent field (CASSCF) and complete active space configuration interaction (CASCI) wave functions and on-top density functionals. We propose a systematic CASCI scheme for the g tensor calculation of the ground state of the systems under consideration, and we show its superiority over the conventional CASSCF scheme. State interaction, which is important for degenerate and nearly degenerate states, is included by extended multi-state PDFT (XMS-PDFT). Applications are reported for the ground doublet states of 25 transition-metal complexes with d1, d5, d7, and d9 configurations. The MC-PDFT methods are shown to be both efficient and accurate as compared with complete active space second-order perturbation theory.
Collapse
Affiliation(s)
- Chen Zhou
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Dihua Wu
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Laura Gagliardi
- Department of Chemistry, Pritzker School of Molecular Engineering, The James Franck Institute and Chicago Center for Theoretical Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Donald G Truhlar
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| |
Collapse
|
6
|
Schulz C, van Gastel M, Pantazis DA, Neese F. Converged Structural and Spectroscopic Properties for Refined QM/MM Models of Azurin. Inorg Chem 2021; 60:7399-7412. [PMID: 33939922 PMCID: PMC8154437 DOI: 10.1021/acs.inorgchem.1c00640] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Indexed: 12/27/2022]
Abstract
Blue copper proteins continue to challenge experiment and theory with their electronic structure and spectroscopic properties that respond sensitively to the coordination environment of the copper ion. In this work, we report state-of-the art electronic structure studies for geometric and spectroscopic properties of the archetypal "Type I" copper protein azurin in its Cu(II) state. A hybrid quantum mechanics/molecular mechanics (QM/MM) approach is used, employing both density functional theory (DFT) and coupled cluster with singles, doubles, and perturbative triples (CCSD(T)) methods for the QM region, the latter method making use of the domain-based local pair natural orbital (DLPNO) approach. Models of increasing QM size are employed to investigate the convergence of critical geometric parameters. It is shown that convergence is slow and that a large QM region is critical for reproducing the short experimental Cu-SCys112 distance. The study of structural convergence is followed by investigation of spectroscopic parameters using both DFT and DLPNO-CC methods and comparing these to the experimental spectrum using simulations. The results allow us to examine for the first time the distribution of spin densities and hyperfine coupling constants at the coupled cluster level, leading us to revisit the experimental assignment of the 33S hyperfine splitting. The wavefunction-based approach to obtain spin-dependent properties of open-shell systems demonstrated here for the case of azurin is transferable and applicable to a large array of bioinorganic systems.
Collapse
Affiliation(s)
- Christine
E. Schulz
- Max-Planck-Institut für
Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Maurice van Gastel
- Max-Planck-Institut für
Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Dimitrios A. Pantazis
- Max-Planck-Institut für
Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Frank Neese
- Max-Planck-Institut für
Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| |
Collapse
|
7
|
Lazorski MS, Schapiro I, Gaddie RS, Lehnig AP, Atanasov M, Neese F, Steiner UE, Elliott CM. Spin-chemical effects on intramolecular photoinduced charge transfer reactions in bisphenanthroline copper(i)-viologen dyad assemblies. Chem Sci 2020; 11:5511-5525. [PMID: 32874494 PMCID: PMC7448374 DOI: 10.1039/d0sc00830c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 05/11/2020] [Indexed: 11/21/2022] Open
Abstract
Two covalently linked donor-acceptor copper phenanthroline complexes (C-A dyads) of interest for solar energy conversion/storage schemes, [Cu(i)(Rphen(OMV)2 4+)2]9+ = RC+A4 8+ with RC+ = [Cu(i)Rphen2]+ involving 2,9-methyl (R = Me) or 2,9-phenyl (R = Ph)-phenanthroline ligands that are 5,6-disubstituted by 4-(n-butoxy) linked methylviologen electron acceptor groups (A2+ = OMV2+), have been synthesized and investigated via quantum chemical calculations and nanosecond laser flash spectroscopy in 1,2-difluorobenzene/methanol (dfb/MeOH) mixtures. Upon photoexcitation, charge transfer (CT) states RC2+A+A3 6+ are formed in less than one ns and decay by charge recombination on a time scale of 6-45 ns. The CT lifetime of RC2+A+A3 6+ has a strong dependence on MeOH solvent fraction when R = Me, but is unaffected if R = Ph. This solvent effect is due to coordination of MeOH solvent in MeC+A4 8+ (i.e. exciplex formation) allowed by conformational flattening of the ligand sphere, which cannot occur in PhC+A4 8+ having bulkier Phphen ligand framework. Interestingly, the decay time of the CT state increases for both species at low magnetic fields with a maximum increase of ca. 30% at ca. 150 mT, then decreases as the field is increased up to 1500 mT, the highest field investigated. This magnetic field effect (MFE) is due to magnetic modulation of the spin dynamics interconverting 3CT and 1CT states. A quantitative modeling according to the radical pair mechanism involving ab initio multireference calculations of the complexes revealed that the spin process is dominated by the effect of Cu hyperfine coupling. The external magnetic field suppresses the hyperfine coupling induced spin state mixing thereby lengthening the CT decay time. This effect is counteracted by the field dependent processes of T0-S mixing through the Δg-mechanism and by a local mode spin-orbit mechanism. Further, the maximum MFE is limited by a finite rate of direct recombination of 3CT states and the spin-rotational mechanism of spin relaxation. This study provides a first comprehensive characterization of Cu(ii)-complex spin chemistry and highlights how spin chemistry can be used to manipulate solar energy harvesting and storage materials.
Collapse
Affiliation(s)
- Megan S Lazorski
- Department of Chemistry , Colorado State University , Fort Collins , CO 80523 , USA .
| | - Igor Schapiro
- Max Planck Institute for Chemical Energy Conversion , D-45470 Mülheim an der Ruhr , Germany
| | - Ross S Gaddie
- Department of Chemistry , Colorado State University , Fort Collins , CO 80523 , USA .
| | - Ammon P Lehnig
- Department of Chemistry , Colorado State University , Fort Collins , CO 80523 , USA .
| | - Mihail Atanasov
- Max Planck Institute for Chemical Energy Conversion , D-45470 Mülheim an der Ruhr , Germany
| | - Frank Neese
- Max Planck Institute for Chemical Energy Conversion , D-45470 Mülheim an der Ruhr , Germany
| | - Ulrich E Steiner
- Department of Chemistry , University of Konstanz , Universitätsstraße 14 , Konstanz , 78457 , Germany
| | - C Michael Elliott
- Department of Chemistry , Colorado State University , Fort Collins , CO 80523 , USA .
| |
Collapse
|
8
|
Roseborough A, Wheeler KA, Hołyńska M, Stoian SA. Synthesis and electronic structure of a mononuclear copper(II) complex supported by tris(2-hydroxyliminopropyl)amine. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
9
|
Lang L, Neese F. Spin-dependent properties in the framework of the dynamic correlation dressed complete active space method. J Chem Phys 2019; 150:104104. [DOI: 10.1063/1.5085203] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Lucas Lang
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| |
Collapse
|
10
|
Heit YN, Sergentu DC, Autschbach J. Magnetic circular dichroism spectra of transition metal complexes calculated from restricted active space wavefunctions. Phys Chem Chem Phys 2019; 21:5586-5597. [DOI: 10.1039/c8cp07849a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Multiconfigurational restricted active space (RAS) self-consistent field (SCF) or configuration interaction (CI) approaches, augmented with a treatment of spin–orbit coupling by state interaction, were used to calculate the magnetic circular dichroism , , and/or for closed- and open-shell transition metal complexes.
Collapse
Affiliation(s)
- Yonaton N. Heit
- Department of Chemistry
- University at Buffalo, State University of New York
- Buffalo
- USA
| | | | - Jochen Autschbach
- Department of Chemistry
- University at Buffalo, State University of New York
- Buffalo
- USA
| |
Collapse
|
11
|
Giner E, Tew DP, Garniron Y, Alavi A. Interplay between Electronic Correlation and Metal–Ligand Delocalization in the Spectroscopy of Transition Metal Compounds: Case Study on a Series of Planar Cu2+ Complexes. J Chem Theory Comput 2018; 14:6240-6252. [DOI: 10.1021/acs.jctc.8b00591] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emmanuel Giner
- Laboratoire de Chimie théorique, Sorbonne Universit, UMR 7616, 4 place Jussieu, 75252 Paris, France
| | - David P. Tew
- Max Planck Institute for Solid State Research, Heisenbergstraβe 1, 70569 Stuttgart, Germany
| | - Yann Garniron
- Laboratoire de Chimie et Physique Quantique, UMR 5626, Universit Paul Sabatier, 118 route de Narbonne 31062 Toulouse, France
| | - Ali Alavi
- Max Planck Institute for Solid State Research, Heisenbergstraβe 1, 70569 Stuttgart, Germany
| |
Collapse
|
12
|
Singh SK, Atanasov M, Neese F. Challenges in Multireference Perturbation Theory for the Calculations of the g-Tensor of First-Row Transition-Metal Complexes. J Chem Theory Comput 2018; 14:4662-4677. [DOI: 10.1021/acs.jctc.8b00513] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saurabh Kumar Singh
- Department of Molecular Theory and Spectroscopy, Max-Planck Institute for Kohlenforschung, Kaiser Wilhelm-Platz-1, Mülheim an der Ruhr, Germany
| | - Mihail Atanasov
- Department of Molecular Theory and Spectroscopy, Max-Planck Institute for Kohlenforschung, Kaiser Wilhelm-Platz-1, Mülheim an der Ruhr, Germany
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Akad. Georgi Bontchev Street 11, 1113 Sofia, Bulgaria
| | - Frank Neese
- Department of Molecular Theory and Spectroscopy, Max-Planck Institute for Kohlenforschung, Kaiser Wilhelm-Platz-1, Mülheim an der Ruhr, Germany
| |
Collapse
|
13
|
Escalera-Moreno L, Suaud N, Gaita-Ariño A, Coronado E. Determining Key Local Vibrations in the Relaxation of Molecular Spin Qubits and Single-Molecule Magnets. J Phys Chem Lett 2017; 8:1695-1700. [PMID: 28350165 DOI: 10.1021/acs.jpclett.7b00479] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
To design molecular spin qubits and nanomagnets operating at high temperatures, there is an urgent need to understand the relationship between vibrations and spin relaxation processes. Herein we develop a simple first-principles methodology to determine the modulation that vibrations exert on spin energy levels. This methodology is applied to [Cu(mnt)2]2- (mnt2- = 1,2-dicyanoethylene-1,2-dithiolate), a highly coherent complex. By theoretically identifying the most relevant vibrational modes, we are able to offer general strategies to chemically design more resilient magnetic molecules, where the energy of the spin states is not coupled to vibrations.
Collapse
Affiliation(s)
- L Escalera-Moreno
- UIMM-ICMol, University of Valencia , c/José Beltrán 2, 46980 Paterna, Spain
| | - N Suaud
- LCPQ-IRSAMC, Université de Toulouse , 118 route de Narbonne, 31062 Toulouse, France
| | - A Gaita-Ariño
- UIMM-ICMol, University of Valencia , c/José Beltrán 2, 46980 Paterna, Spain
| | - E Coronado
- UIMM-ICMol, University of Valencia , c/José Beltrán 2, 46980 Paterna, Spain
| |
Collapse
|
14
|
Giner E, Tenti L, Angeli C, Ferré N. Computation of the Isotropic Hyperfine Coupling Constant: Efficiency and Insights from a New Approach Based on Wave Function Theory. J Chem Theory Comput 2017; 13:475-487. [DOI: 10.1021/acs.jctc.6b00827] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Emmanuel Giner
- Dipartimento
di Scienze Chimiche e Famaceutiche, Universita di Ferrara, Via Fossato
di Mortara 17, I-44121 Ferrara, Italy
| | - Lorenzo Tenti
- Dipartimento
di Scienze Chimiche e Famaceutiche, Universita di Ferrara, Via Fossato
di Mortara 17, I-44121 Ferrara, Italy
| | - Celestino Angeli
- Dipartimento
di Scienze Chimiche e Famaceutiche, Universita di Ferrara, Via Fossato
di Mortara 17, I-44121 Ferrara, Italy
| | | |
Collapse
|
15
|
Hurd CA, Besley NA, Robinson D. A QM/MM study of the nature of the entatic state in plastocyanin. J Comput Chem 2016; 38:1431-1437. [PMID: 27859435 PMCID: PMC5434870 DOI: 10.1002/jcc.24666] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 10/23/2016] [Accepted: 10/27/2016] [Indexed: 11/27/2022]
Abstract
Plastocyanin is a copper containing protein that is involved in the electron transfer process in photosynthetic organisms. The active site of plastocyanin is described as an entatic state whereby its structure represents a compromise between the structures favored by the oxidized and reduced forms. In this study, the nature of the entatic state is investigated through density functional theory‐based hybrid quantum mechanics/molecular mechanics (QM/MM) molecular dynamics simulations. The strain energy is computed to be 12.8 kcal/mol and 14.5 kcal/mol for the oxidized and reduced forms of the protein, indicating that the active site has an intermediate structure. It is shown that the energy gap between the oxidized and reduced forms varies significantly with the fluctuations in the structure of the active site at room temperature. An accurate determination of the reorganization energy requires averaging over conformation and a large region of the protein around the active site to be treated at the quantum mechanical level. © 2016 The Authors. Journal of Computational Chemistry Published by Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Catherine A Hurd
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
| | - Nicholas A Besley
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
| | - David Robinson
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
| |
Collapse
|
16
|
Sivalingam K, Krupicka M, Auer AA, Neese F. Comparison of fully internally and strongly contracted multireference configuration interaction procedures. J Chem Phys 2016; 145:054104. [DOI: 10.1063/1.4959029] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Kantharuban Sivalingam
- Max-Planck Institute of Chemical Energy Conversion, Stiftstrasse 34, 45470 Mülheim an der Ruhr, Germany
| | - Martin Krupicka
- Max-Planck Institute of Chemical Energy Conversion, Stiftstrasse 34, 45470 Mülheim an der Ruhr, Germany
| | - Alexander A. Auer
- Max-Planck Institute of Chemical Energy Conversion, Stiftstrasse 34, 45470 Mülheim an der Ruhr, Germany
| | - Frank Neese
- Max-Planck Institute of Chemical Energy Conversion, Stiftstrasse 34, 45470 Mülheim an der Ruhr, Germany
| |
Collapse
|
17
|
Hayes EC, Porter TR, Barrows CJ, Kaminsky W, Mayer JM, Stoll S. Electronic Structure of a Cu(II)-Alkoxide Complex Modeling Intermediates in Copper-Catalyzed Alcohol Oxidations. J Am Chem Soc 2016; 138:4132-45. [PMID: 26907976 PMCID: PMC4988936 DOI: 10.1021/jacs.5b13088] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
In the copper-catalyzed oxidation of alcohols to aldehydes, a Cu(II)-alkoxide (Cu(II)-OR) intermediate is believed to modulate the αC-H bond strength of the deprotonated substrate to facilitate the oxidation. As a structural model for these intermediates, we characterized the electronic structure of the stable compound Tp(tBu)Cu(II)(OCH2CF3) (Tp(tBu) = hydro-tris(3-tert-butyl-pyrazolyl)borate) and investigated the influence of the trifluoroethoxide ligand on the electronic structure of the complex. The compound exhibits an electron paramagnetic resonance (EPR) spectrum with an unusually large gzz value of 2.44 and a small copper hyperfine coupling Azz of 40 × 10(-4) cm(-1) (120 MHz). Single-crystal electron nuclear double resonance (ENDOR) spectra show that the unpaired spin population is highly localized on the copper ion (≈68%), with no more than 15% on the ethoxide oxygen. Electronic absorption and magnetic circular dichroism (MCD) spectra show weak ligand-field transitions between 5000 and 12,000 cm(-1) and an intense ethoxide-to-copper charge transfer (LMCT) transition at 24,000 cm(-1), resulting in the red color of this complex. Resonance Raman (rR) spectroscopy reveals a Cu-O stretch mode at 592 cm(-1). Quantum chemical calculations support the interpretation and assignment of the experimental data. Compared to known Cu(II)-thiolate and Cu(II)-alkylperoxo complexes from the literature, we found an increased σ interaction in the Cu(II)-OR bond that results in the spectroscopic features. These insights lay the basis for further elucidating the mechanism of copper-catalyzed alcohol oxidations.
Collapse
Affiliation(s)
- Ellen C. Hayes
- Department of Chemistry, Box 351700, University of Washington, Seattle, WA 98195
| | | | - Charles J. Barrows
- Department of Chemistry, Box 351700, University of Washington, Seattle, WA 98195
| | - Werner Kaminsky
- Department of Chemistry, Box 351700, University of Washington, Seattle, WA 98195
| | | | - Stefan Stoll
- Department of Chemistry, Box 351700, University of Washington, Seattle, WA 98195
| |
Collapse
|
18
|
Giner E, Angeli C. Spin density and orbital optimization in open shell systems: A rational and computationally efficient proposal. J Chem Phys 2016; 144:104104. [DOI: 10.1063/1.4943187] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Emmanuel Giner
- Dipartimento di Scienze Chimiche e Famaceutiche, Universita di Ferrara, Via Fossato di Mortara 17, I-44121 Ferrara, Italy
| | - Celestino Angeli
- Dipartimento di Scienze Chimiche e Famaceutiche, Universita di Ferrara, Via Fossato di Mortara 17, I-44121 Ferrara, Italy
| |
Collapse
|
19
|
Giner E, Angeli C. Metal-ligand delocalization and spin density in the CuCl2 and [CuCl4]2− molecules: Some insights from wave function theory. J Chem Phys 2015; 143:124305. [DOI: 10.1063/1.4931639] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Emmanuel Giner
- Dipartimento di Scienze Chimiche e Famaceutiche, Universita di Ferrara, Via Fossato di Mortara 17, I-44121 Ferrara, Italy
| | - Celestino Angeli
- Dipartimento di Scienze Chimiche e Famaceutiche, Universita di Ferrara, Via Fossato di Mortara 17, I-44121 Ferrara, Italy
| |
Collapse
|
20
|
Vogiatzis KD, Li Manni G, Stoneburner SJ, Ma D, Gagliardi L. Systematic Expansion of Active Spaces beyond the CASSCF Limit: A GASSCF/SplitGAS Benchmark Study. J Chem Theory Comput 2015; 11:3010-21. [DOI: 10.1021/acs.jctc.5b00191] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Konstantinos D. Vogiatzis
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Giovanni Li Manni
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
- Max Planck Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Samuel J. Stoneburner
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Dongxia Ma
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
- Max Planck Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Laura Gagliardi
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| |
Collapse
|
21
|
Maurice R, Verma P, Zadrozny JM, Luo S, Borycz J, Long JR, Truhlar DG, Gagliardi L. Single-Ion Magnetic Anisotropy and Isotropic Magnetic Couplings in the Metal–Organic Framework Fe2(dobdc). Inorg Chem 2013; 52:9379-89. [DOI: 10.1021/ic400953e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Rémi Maurice
- Department of Chemistry, Supercomputing Institute, and Chemical Theory
Center, University of Minnesota, Minneapolis,
Minnesota 55455, United States
| | - Pragya Verma
- Department of Chemistry, Supercomputing Institute, and Chemical Theory
Center, University of Minnesota, Minneapolis,
Minnesota 55455, United States
| | - Joseph M. Zadrozny
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Sijie Luo
- Department of Chemistry, Supercomputing Institute, and Chemical Theory
Center, University of Minnesota, Minneapolis,
Minnesota 55455, United States
| | - Joshua Borycz
- Department of Chemistry, Supercomputing Institute, and Chemical Theory
Center, University of Minnesota, Minneapolis,
Minnesota 55455, United States
| | - Jeffrey R. Long
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Donald G. Truhlar
- Department of Chemistry, Supercomputing Institute, and Chemical Theory
Center, University of Minnesota, Minneapolis,
Minnesota 55455, United States
| | - Laura Gagliardi
- Department of Chemistry, Supercomputing Institute, and Chemical Theory
Center, University of Minnesota, Minneapolis,
Minnesota 55455, United States
| |
Collapse
|
22
|
Do H, Deeth RJ, Besley NA. Computational study of the structure and electronic circular dichroism spectroscopy of blue copper proteins. J Phys Chem B 2013; 117:8105-12. [PMID: 23773120 DOI: 10.1021/jp404107j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The calculation of the electronic circular dichroism (CD) spectra of the oxidized form of the blue copper proteins plastocyanin and cucumber basic protein and the relationship between the observed spectral features and the structure of the active site of the protein is investigated. Excitation energies and transition strengths are computed using multireference configuration interaction, and it is shown that computed spectra based on coordinates from the crystal structure or a single structure optimized in quantum mechanics/molecular mechanics (QM/MM) or ligand field molecular mechanics (LFMM) are qualitatively incorrect. In particular, the rotational strength of the ligand to metal charge transfer band is predicted to be too small or have the incorrect sign. By considering calculations on active site models with modified structures, it is shown that the intensity of this band is sensitive to the nonplanarity of the histidine and cysteine ligands coordinated to copper. Calculation of the ultraviolet absorption and CD spectra based upon averaging over many structures drawn from a LFMM molecular dynamics simulation are in good agreement with experiment, and superior to analogous calculations based upon structures from a classical molecular dynamics simulation. This provides evidence that the LFMM force field provides an accurate description of the molecular dynamics of these proteins.
Collapse
Affiliation(s)
- Hainam Do
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | | | | |
Collapse
|
23
|
Chibotaru LF. Ab InitioMethodology for Pseudospin Hamiltonians of Anisotropic Magnetic Complexes. ADVANCES IN CHEMICAL PHYSICS 2013. [DOI: 10.1002/9781118571767.ch6] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
|
24
|
Rulíšek L, Ryde U. Theoretical studies of the active-site structure, spectroscopic and thermodynamic properties, and reaction mechanism of multicopper oxidases. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2012.04.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
25
|
Do H, Besley NA. Theoretical Study of the Electronic Spectra of Small Molecules That Incorporate Analogues of the Copper–Cysteine Bond. J Phys Chem A 2012; 116:8507-14. [DOI: 10.1021/jp305807z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hainam Do
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, U.K
| | - Nicholas A. Besley
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, U.K
| |
Collapse
|
26
|
Vancoillie S, Hendrickx M, Nguyen MT, Pierloot K, Ceulemans A, Mack J, Kobayashi N. Fourteen-electron ring model and the anomalous magnetic circular dichroism of meso-triarylsubporphyrins. J Phys Chem A 2012; 116:3960-7. [PMID: 22435833 DOI: 10.1021/jp302623q] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The MCD spectra of meso-triarylsubporphyrins show a sign anomaly which is correlated with the acceptor properties of the aryl substituent. From the spectra, magnetic moments of the excited states are determined. In the context of a simplified orbital model, the sign change is attributed to the quenching of the magnetic moment of the LUMO by acceptor orbitals of the substituent. The actual calculation of this moment presents a major challenge to computational methods. It is shown that wave function techniques based on CASSCF underestimate the covalency effects that are responsible for the quenching. In contrast, a CI method based on DFT orbitals yields excellent results, which fully support the orbital model.
Collapse
Affiliation(s)
- Steven Vancoillie
- Department of Chemistry and Institute for Nanoscale Physics and Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | | | | | | | | | | | | |
Collapse
|
27
|
Helgaker T, Coriani S, Jørgensen P, Kristensen K, Olsen J, Ruud K. Recent Advances in Wave Function-Based Methods of Molecular-Property Calculations. Chem Rev 2012; 112:543-631. [DOI: 10.1021/cr2002239] [Citation(s) in RCA: 463] [Impact Index Per Article: 38.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Trygve Helgaker
- Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Sonia Coriani
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, Via Giorgieri 1, I-34127 Trieste, Italy
| | - Poul Jørgensen
- Lundbeck Center for Theoretical Chemistry, Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
| | - Kasper Kristensen
- Lundbeck Center for Theoretical Chemistry, Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
| | - Jeppe Olsen
- Lundbeck Center for Theoretical Chemistry, Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
| | - Kenneth Ruud
- Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway
| |
Collapse
|
28
|
Rokob TA, Srnec M, Rulíšek L. Theoretical calculations of physico-chemical and spectroscopic properties of bioinorganic systems: current limits and perspectives. Dalton Trans 2012; 41:5754-68. [DOI: 10.1039/c2dt12423h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
29
|
Roca-Sanjuán D, Aquilante F, Lindh R. Multiconfiguration second-order perturbation theory approach to strong electron correlation in chemistry and photochemistry. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2011. [DOI: 10.1002/wcms.97] [Citation(s) in RCA: 124] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
30
|
Golubeva EN, Gromov OI, Zhidomirov GM. Cu(II)-Alkyl Chlorocomplexes: Stable Compounds or Transients? DFT Prediction of their Structure and EPR Parameters. J Phys Chem A 2011; 115:8147-54. [DOI: 10.1021/jp202314h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Elena N. Golubeva
- Chemistry Department, Lomonosov Moscow State University, Leninskiye Gory 1-3, Moscow, Russia
| | - Oleg I. Gromov
- Chemistry Department, Lomonosov Moscow State University, Leninskiye Gory 1-3, Moscow, Russia
| | - Georgii M. Zhidomirov
- Chemistry Department, Lomonosov Moscow State University, Leninskiye Gory 1-3, Moscow, Russia
- Boreskov Institute of Catalysis (BIC), SO RAN, Novosibirsk, 630090, Russia
| |
Collapse
|
31
|
Rinkevicius Z, Murugan NA, Kongsted J, Aidas K, Steindal AH, Ågren H. Density Functional Theory/Molecular Mechanics Approach for Electronic g-Tensors of Solvated Molecules. J Phys Chem B 2011; 115:4350-8. [DOI: 10.1021/jp1108653] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Zilvinas Rinkevicius
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, SE-106 91 Stockholm, Sweden
- Swedish e-Science Research Center (SeRC), Royal Institute of Technology, 10044 Stockholm, Sweden
| | - N. Arul Murugan
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Jacob Kongsted
- Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Kęstutis Aidas
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Arnfinn Hykkerud Steindal
- Centre of Theoretical and Computational Chemistry, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway
| | - Hans Ågren
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| |
Collapse
|
32
|
Borta A, Jeanneau E, Chumakov Y, Luneau D, Ungur L, Chibotaru LF, Wernsdorfer W. Synthesis, structure, magnetism and theoretical study of a series of complexes with a decanuclear core [Ln(iii)2Cu(ii)8] (Ln = Y, Gd, Tb, Dy). NEW J CHEM 2011. [DOI: 10.1039/c0nj00931h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
33
|
Besley NA, Robinson D. Theoretical simulation of the spectroscopy and dynamics of a red copper protein. Faraday Discuss 2011; 148:55-70; discussion 97-108. [DOI: 10.1039/c004231e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
34
|
Zhong JH, Li GR, Wang ZL, Ou YN, Tong YX. Facile Electrochemical Synthesis of Hexagonal Cu2O Nanotube Arrays and Their Application. Inorg Chem 2010; 50:757-63. [DOI: 10.1021/ic1017664] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin-Hui Zhong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Institute of Optoelectronic and Functional Composite Materials, Sun Yat-sen University, Guangzhou 510275, China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Institute of Optoelectronic and Functional Composite Materials, Sun Yat-sen University, Guangzhou 510275, China
| | - Zi-Long Wang
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Institute of Optoelectronic and Functional Composite Materials, Sun Yat-sen University, Guangzhou 510275, China
| | - Yan-Nan Ou
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Institute of Optoelectronic and Functional Composite Materials, Sun Yat-sen University, Guangzhou 510275, China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Institute of Optoelectronic and Functional Composite Materials, Sun Yat-sen University, Guangzhou 510275, China
| |
Collapse
|
35
|
Sauri V, Serrano-Andrés L, Shahi ARM, Gagliardi L, Vancoillie S, Pierloot K. Multiconfigurational Second-Order Perturbation Theory Restricted Active Space (RASPT2) Method for Electronic Excited States: A Benchmark Study. J Chem Theory Comput 2010; 7:153-68. [PMID: 26606229 DOI: 10.1021/ct100478d] [Citation(s) in RCA: 132] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The recently developed second-order perturbation theory restricted active space (RASPT2) method has been benchmarked versus the well-established complete active space (CASPT2) approach. Vertical excitation energies for valence and Rydberg excited states of different groups of organic (polyenes, acenes, heterocycles, azabenzenes, nucleobases, and free base porphin) and inorganic (nickel atom and copper tetrachloride dianion) molecules have been computed at the RASPT2 and multistate (MS) RASPT2 levels using different reference spaces and compared with CASPT2, CCSD, and experimental data in order to set the accuracy of the approach, which extends the applicability of multiconfigurational perturbation theory to much larger and complex systems than previously. Relevant aspects in multiconfigurational excited state quantum chemistry such as the valence-Rydberg mixing problem in organic molecules or the double d-shell effect for first-row transition metals have also been addressed.
Collapse
Affiliation(s)
- Vicenta Sauri
- Instituto de Ciencia Molecular, Universitat de València, P.O. Box 22085, ES-46071 Valencia, Spain, Department of Physical Chemistry, University of Geneva, 30, q. E. Ansermet, 1211 Genève, Switzerland, Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455-0431, United States, and Department of Chemistry, Katholieke Universiteit Leuven, Belgium
| | - Luis Serrano-Andrés
- Instituto de Ciencia Molecular, Universitat de València, P.O. Box 22085, ES-46071 Valencia, Spain, Department of Physical Chemistry, University of Geneva, 30, q. E. Ansermet, 1211 Genève, Switzerland, Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455-0431, United States, and Department of Chemistry, Katholieke Universiteit Leuven, Belgium
| | - Abdul Rehaman Moughal Shahi
- Instituto de Ciencia Molecular, Universitat de València, P.O. Box 22085, ES-46071 Valencia, Spain, Department of Physical Chemistry, University of Geneva, 30, q. E. Ansermet, 1211 Genève, Switzerland, Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455-0431, United States, and Department of Chemistry, Katholieke Universiteit Leuven, Belgium
| | - Laura Gagliardi
- Instituto de Ciencia Molecular, Universitat de València, P.O. Box 22085, ES-46071 Valencia, Spain, Department of Physical Chemistry, University of Geneva, 30, q. E. Ansermet, 1211 Genève, Switzerland, Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455-0431, United States, and Department of Chemistry, Katholieke Universiteit Leuven, Belgium
| | - Steven Vancoillie
- Instituto de Ciencia Molecular, Universitat de València, P.O. Box 22085, ES-46071 Valencia, Spain, Department of Physical Chemistry, University of Geneva, 30, q. E. Ansermet, 1211 Genève, Switzerland, Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455-0431, United States, and Department of Chemistry, Katholieke Universiteit Leuven, Belgium
| | - Kristine Pierloot
- Instituto de Ciencia Molecular, Universitat de València, P.O. Box 22085, ES-46071 Valencia, Spain, Department of Physical Chemistry, University of Geneva, 30, q. E. Ansermet, 1211 Genève, Switzerland, Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455-0431, United States, and Department of Chemistry, Katholieke Universiteit Leuven, Belgium
| |
Collapse
|
36
|
Rastrelli F, Bagno A. Predicting the ¹H and ¹³C NMR spectra of paramagnetic Ru(III) complexes by DFT. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2010; 48 Suppl 1:S132-S141. [PMID: 20821378 DOI: 10.1002/mrc.2666] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Nuclear shieldings, including the Fermi-contact and pseudocontact terms, have been calculated with density functional theory (DFT) (nonrelativistic and relativistic) methods in several Ru(III) complexes, thereby predicting (1)H and (13)C paramagnetic shifts. A fair agreement with experimental values is observed. Structural, magnetic and dynamic parameters have also been input to the Solomon-Bloembergen equation in order to predict signal lineshapes. It is shown that DFT-predicted paramagnetic shifts can greatly aid in obtaining and understanding NMR spectra of paramagnetic Ru(III) complexes.
Collapse
Affiliation(s)
- Federico Rastrelli
- Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo, 1-35131 Padova, Italy
| | | |
Collapse
|
37
|
Vancoillie S, Chalupský J, Ryde U, Solomon EI, Pierloot K, Neese F, Rulísek L. Multireference ab initio calculations of g tensors for trinuclear copper clusters in multicopper oxidases. J Phys Chem B 2010; 114:7692-702. [PMID: 20469875 DOI: 10.1021/jp103098r] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
EPR spectroscopy has proven to be an indispensable tool in elucidating the structure of metal sites in proteins. In recent years, experimental EPR data have been complemented by theoretical calculations, which have become a standard tool of many quantum chemical packages. However, there have only been a few attempts to calculate EPR g tensors for exchange-coupled systems with more than two spins. In this work, we present a quantum chemical study of structural, electronic, and magnetic properties of intermediates in the reaction cycle of multicopper oxidases and of their inorganic models. All these systems contain three copper(II) ions bridged by hydroxide or O(2-) anions and their ground states are antiferromagnetically coupled doublets. We demonstrate that only multireference methods, such as CASSCF/CASPT2 or MRCI can yield qualitatively correct results (compared to the experimental values) and consider the accuracy of the calculated EPR g tensors as the current benchmark of quantum chemical methods. By decomposing the calculated g tensors into terms arising from interactions of the ground state with the various excited states, the origin of the zero-field splitting is explained. The results of the study demonstrate that a truly quantitative prediction of the g tensors of exchange-coupled systems is a great challenge to contemporary theory. The predictions strongly depend on small energy differences that are difficult to predict with sufficient accuracy by any quantum chemical method that is applicable to systems of the size of our target systems.
Collapse
Affiliation(s)
- Steven Vancoillie
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium
| | | | | | | | | | | | | |
Collapse
|
38
|
Chen H, Song J, Lai W, Wu W, Shaik S. Multiple Low-Lying States for Compound I of P450cam and Chloroperoxidase Revealed from Multireference Ab Initio QM/MM Calculations. J Chem Theory Comput 2010; 6:940-53. [DOI: 10.1021/ct9006234] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hui Chen
- Institute of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry, Hebrew University of Jerusalem, Givat Ram Campus, 91904 Jerusalem, Israel, State Key Laboratory of Physical Chemistry and Chemical Engineering, Xiamen University, 361005 Xiamen, P. R. China
| | - Jinshuai Song
- Institute of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry, Hebrew University of Jerusalem, Givat Ram Campus, 91904 Jerusalem, Israel, State Key Laboratory of Physical Chemistry and Chemical Engineering, Xiamen University, 361005 Xiamen, P. R. China
| | - Wenzhen Lai
- Institute of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry, Hebrew University of Jerusalem, Givat Ram Campus, 91904 Jerusalem, Israel, State Key Laboratory of Physical Chemistry and Chemical Engineering, Xiamen University, 361005 Xiamen, P. R. China
| | - Wei Wu
- Institute of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry, Hebrew University of Jerusalem, Givat Ram Campus, 91904 Jerusalem, Israel, State Key Laboratory of Physical Chemistry and Chemical Engineering, Xiamen University, 361005 Xiamen, P. R. China
| | - Sason Shaik
- Institute of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry, Hebrew University of Jerusalem, Givat Ram Campus, 91904 Jerusalem, Israel, State Key Laboratory of Physical Chemistry and Chemical Engineering, Xiamen University, 361005 Xiamen, P. R. China
| |
Collapse
|
39
|
Robinson D, Besley NA. Modelling the spectroscopy and dynamics of plastocyanin. Phys Chem Chem Phys 2010; 12:9667-76. [DOI: 10.1039/c001805h] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
40
|
Sottini S, Gast P, Blok A, Canters GW, Cavazzini D, Rossi GL, Groenen EJJ. A Proton ENDOR Study of Azurin. APPLIED MAGNETIC RESONANCE 2010; 37:219-227. [PMID: 19960067 PMCID: PMC2784076 DOI: 10.1007/s00723-009-0048-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2009] [Revised: 06/23/2009] [Indexed: 05/15/2023]
Abstract
As part of our ongoing project that aims at the optimum characterization of the electronic structure of the blue-copper site of azurin from Pseudomonas aeruginosa, we present the complete hyperfine tensors of the protons bound to the Cbeta atom of the copper-bound cysteine 112. These tensors have been obtained from a 95 GHz pulsed electron-nuclear double resonance study of a single crystal of the protein.
Collapse
Affiliation(s)
- Silvia Sottini
- Huygens Laboratory, Leiden University, P.O. Box 9504, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
| | - Peter Gast
- Huygens Laboratory, Leiden University, P.O. Box 9504, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
| | - Anneloes Blok
- Gorlaeus Laboratories, Metallo Protein Group, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Gerard W. Canters
- Gorlaeus Laboratories, Metallo Protein Group, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Davide Cavazzini
- Department of Biochemistry and Molecular Biology, University of Parma, Parco Area delle Scienze 23 A, 43100 Parma, Italy
| | - Gian Luigi Rossi
- Department of Biochemistry and Molecular Biology, University of Parma, Parco Area delle Scienze 23 A, 43100 Parma, Italy
| | - Edgar J. J. Groenen
- Huygens Laboratory, Leiden University, P.O. Box 9504, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
| |
Collapse
|
41
|
Rastrelli F, Bagno A. Predicting the NMR Spectra of Paramagnetic Molecules by DFT: Application to Organic Free Radicals and Transition-Metal Complexes. Chemistry 2009; 15:7990-8004. [DOI: 10.1002/chem.200802443] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
42
|
A multiconfigurational perturbation theory study of the electronic structure and EPR g values of an oxomolybdenum enzyme model complex. Theor Chem Acc 2009. [DOI: 10.1007/s00214-009-0605-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
43
|
Golubeva EN, Zhidomirov GM, Kokorin AI. On the stability of copper(II) organic compounds with the σ bond Cu-C: A quantum-chemical study. DOKLADY CHEMISTRY 2009. [DOI: 10.1134/s0012500809060081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
44
|
Vancoillie S, Rulíšek L, Neese F, Pierloot K. Theoretical Description of the Structure and Magnetic Properties of Nitroxide−Cu(II)−Nitroxide Spin Triads by Means of Multiconfigurational Ab Initio Calculations. J Phys Chem A 2009; 113:6149-57. [DOI: 10.1021/jp900822v] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Steven Vancoillie
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Lubomír Rulíšek
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Frank Neese
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Kristine Pierloot
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Heverlee-Leuven, Belgium, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, and Gilead Sciences Research Center at IOCB, Flemingovo nam. 2, 166 10 Praha 6, Czech Republic, and Institut für Pysikalische and Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| |
Collapse
|
45
|
Wojciechowski K, Bitner A, Bernardinelli G, Brynda M. Azacrown ether–copper(ii)–hexanoate complexes. From monomer to 1-D metal organic polymer. Dalton Trans 2009:1114-22. [DOI: 10.1039/b811374b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
46
|
Rinkevicius Z, de Almeida KJ, Vahtras O. Density functional restricted-unrestricted approach for nonlinear properties: application to electron paramagnetic resonance parameters of square planar copper complexes. J Chem Phys 2008; 129:064109. [PMID: 18715053 DOI: 10.1063/1.2964102] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The density functional restricted-unrestricted approach for treatments of spin polarization effects in molecular properties using spin restricted Kohn-Sham theory has been extended from linear to nonlinear properties. It is shown that the spin polarization contribution to a nonlinear property has the form of a quadratic response function that includes the zero-order Kohn-Sham operator, in analogy to the lower order case where the spin polarization correction to an expectation value has the form of a linear response function. The developed approach is used to formulate new schemes for computation of electronic g-tensors and hyperfine coupling constants, which include spin polarization effects within the framework of spin restricted Kohn-Sham theory. The proposed computational schemes are in the present work employed to study the spin polarization effects on electron paramagnetic resonance spin Hamiltonian parameters of square planar copper complexes. The obtained results indicate that spin polarization gives rise to sizable contributions to the hyperfine coupling tensor of copper in all investigated complexes, while the electronic g-tensors of these complexes are only marginally affected by spin polarization and other factors, such as choice of exchange-correlation functional or molecular structures, will have more pronounced impact on the accuracy of the results.
Collapse
Affiliation(s)
- Zilvinas Rinkevicius
- Department of Theoretical Chemistry, School of Biotechnology, The Royal Institute of Technology, SE-10691 Stockholm, Sweden.
| | | | | |
Collapse
|