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Dhimba G, Muller A, Lammertsma K. Chiral-at-Metal Racemization Unraveled for MX 2 (a-chel) 2 by means of a Computational Analysis of MoO 2 (acnac) 2. Chemistry 2023; 29:e202302516. [PMID: 37730887 DOI: 10.1002/chem.202302516] [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: 08/02/2023] [Revised: 09/13/2023] [Accepted: 09/14/2023] [Indexed: 09/22/2023]
Abstract
Octahedral chiral-at-metal complexes MX2 (a-chel)2 (a-chel=asymmetric chelate) can rearrange their ligands by four mechanisms known as the Bailar (B), Ray-Dutt (RD), Conte-Hippler (CH), and Dhimba-Muller-Lammertsma (DML) twists. Racemization involves their interconnections, which were computed for MoO2 (acnac)2 (acnac=β-ketoiminate) using density functional theory at ωB97x-D with the 6-31G(d,p) and 6-311G(2d,p) basis sets and LANL2DZ for molybdenum. Racemizing the cis(NN) isomer, being the global energy minimum with trans oriented imine groups, is a three step process (DML-CH-DML) that requires 17.4 kcal/mol, while all three cis isomers (cis(NN), cis(NO), and cis(OO)) interconvert at ≤17.9 kcal/mol. The B and RD twists are energetically not competitive and neither are the trans isomers. The interconnection of all enantiomeric minima and transition structures is summarized in a graph that also visualizes valley ridge inflection points for two of the three CH twists. Geometrical features of the minima and twists are given. Lastly, the influence of N-substitution on the favored racemization pathway is evaluated. The present comprehensive study serves as a template for designing chiral-at-metal MX2 (a-chel)2 catalysts that may retain their chiral integrity.
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Affiliation(s)
- George Dhimba
- Department of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg, 2006, South Africa
| | - Alfred Muller
- Department of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg, 2006, South Africa
| | - Koop Lammertsma
- Department of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg, 2006, South Africa
- Department of Chemistry and Pharmaceutical Sciences, Faculty of Sciences Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
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2
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Veleta JM, Arrieta RA, Wu Y, Baeza MA, Castañeda K, Villagrán D. Enhanced Gas Adsorption on Cu 3(BTC) 2 Metal-Organic Framework by Post-Synthetic Cation Exchange and Computational Analysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37267477 DOI: 10.1021/acs.langmuir.3c00455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Increased gas adsorption in a series of post-synthetically modified metal-organic frameworks (MOFs) of the type HKUST-1 was achieved by the partial cation exchange process. Manipulation of post-synthetic conditions demonstrates high tunability in the site substitution and gas adsorption properties during the dynamic equilibrium process. In this work, post-synthetic modification of Cu3(BTC)2 is carried on by exposure to TM2+ solutions (TM = Mn, Fe, Co, Ni) at different time intervals. The crystal structure, composition, and morphology were studied by powder X-ray diffraction, Fourier-transform infrared spectroscopy, inductively coupled plasma optical emission spectroscopy, and scanning electron microscopy. Structural analysis supports the retention of the crystal structure and partial substitution of the Cu metal nodes within the framework. A linear increase in the transmetalation process is observed with Fe and Co with a maximum percentage of 39 and 18%, respectively. Conversely, relatively low cation exchange is observed with Mn having a maximum percentage of 2.40% and Ni with only 2.02%. Gas adsorption measurements and surface area analysis were determined for each species. Interestingly, (Cu/Mn)3(BTC)2 revealed the highest CO2 adsorption capacity of 5.47 mmol/g, compared to 3.08 mmol/g for Cu3(BTC)2. The overall increased gas adsorption can be attributed to the formation of defects in the crystal structure during the cation exchange process. These results demonstrate the outstanding potential of post-synthetic ion exchange as a general approach to fine-tuning the physical properties of existing MOF architectures.
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Affiliation(s)
- José M Veleta
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Roy A Arrieta
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Yanyu Wu
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Miguel A Baeza
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Karen Castañeda
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Dino Villagrán
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
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3
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Kuehn MA, Fernandez W, Zall CM. Structure and Thermodynamic Hydricity in Cobalt(triphosphine)(monophosphine) Hydrides. Inorg Chem 2023. [PMID: 37216471 DOI: 10.1021/acs.inorgchem.2c04124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The mononuclear cobalt hydride complex [HCo(triphos)(PMe3)], in which triphos = PhP(CH2CH2PPh2)2, was synthesized and characterized by X-ray crystallography and by 1H and 31P NMR spectroscopy. The geometry of the compound is a distorted trigonal bipyramid in which the axial positions are occupied by the hydride and the central phosphorus atom of the triphos ligand, while the PMe3 and terminal triphos donor atoms occupy the equatorial positions. Protonation of [HCo(triphos)(PMe3)] generates H2 and the Co(I) cation, [Co(triphos)(PMe3)]+, and this reaction is reversible under an atmosphere of H2 when the proton source is weakly acidic. The thermodynamic hydricity of HCo(triphos)(PMe3) was determined to be 40.3 kcal/mol in MeCN from measurements of these equilibria. The reactivity of the hydride is, therefore, well suited to CO2 hydrogenation catalysis. Density functional theory (DFT) calculations were performed to evaluate the structures and hydricities of a series of analogous cobalt(triphosphine)(monophosphine) hydrides where the phosphine substituents are systematically changed from Ph to Me. The calculated hydricities range from 38.5 to 47.7 kcal/mol. Surprisingly, the hydricities of the complexes are generally insensitive to substitution at the triphosphine ligand, as a result of competing structural and electronic trends. The DFT-calculated geometries of the [Co(triphos)(PMe3)]+ cations are more square planar when the triphosphine ligand possesses bulkier phenyl groups and more tetrahedrally distorted when the triphosphine ligand has smaller methyl substituents, reversing the trend observed for [M(diphosphine)2]+ cations. More distorted structures are associated with an increase in ΔGH-°, and this structural trend counteracts the electronic effect in which methyl substitution at the triphosphine is expected to yield smaller ΔGH-° values. However, the steric influence of the monophosphine follows the normal trend that phenyl substituents give more distorted structures and increased ΔGH-° values.
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Affiliation(s)
- Makenzie A Kuehn
- Department of Chemistry, Sam Houston State University, 1003 Bowers Boulevard, Huntsville, Texas 77341, United States
| | - William Fernandez
- Department of Chemistry, Sam Houston State University, 1003 Bowers Boulevard, Huntsville, Texas 77341, United States
| | - Christopher M Zall
- Department of Chemistry, Sam Houston State University, 1003 Bowers Boulevard, Huntsville, Texas 77341, United States
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4
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Liang G, Zhang M. Insights into the Fluxional Processes of Monomethylcyclohexenyl Manganese Tricarbonyl. Molecules 2023; 28:molecules28073232. [PMID: 37049994 PMCID: PMC10096699 DOI: 10.3390/molecules28073232] [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: 03/09/2023] [Revised: 04/02/2023] [Accepted: 04/03/2023] [Indexed: 04/14/2023] Open
Abstract
Multiple fluxional processes of 6-monomethylcyclohexenylmanganese tricarbonyl [(6-MeC6H8)Mn(CO)3, complex 1] and 5-monomethylcyclohexenylmanganese tricarbonyl [(5-MeC6H8)Mn(CO)3, complex 2] have been explored using density functional theory (DFT) computations. The contributions of four agostomers-1, 2, 3, and 4-to the (MeC6H8)Mn(CO)3 exchange processes were revealed. The computational results demonstrated that the 1, 2-agostic isomerization only occurred via the η4-diene hydride transition state (TS-1-2, 14.0 kcal/mol), which is consistent with the experimentally proposed high-energy exchange process (16.0 kcal/mol). Excellent agreement is observed (R2 = 0.9862) when comparing the computed and experimentally observed variable temperature 1H NMR chemical shifts. With these results, important insights into the role of agostic interaction in the homogeneous catalysis process could be made, especially with regard to transition metal catalyzed C-H activation.
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Affiliation(s)
- Guangchao Liang
- Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an 710071, China
| | - Min Zhang
- Department of Pharmacy, School of Medicine, Xi'an International University, Xi'an 710077, China
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5
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Substituent effects in carbon-nanotube-supported diiron monophosphine complexes for hydrogen evolution reaction. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Ito D, Nakao Y, Ishizaki M, Kurihara M, Ando H. Effect of Static Jahn-Teller Distortion on the Li + Transport in a Copper Hexacyanoferrate Framework. J Phys Chem A 2022; 126:6814-6825. [PMID: 36135963 DOI: 10.1021/acs.jpca.2c02398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Prussian blue (PB) and its analogues (PBAs) are potential cathode-active materials for rechargeable lithium-ion batteries. Although a body of research has assessed the performances of various PB/PBA cathodes with an eye to practical use, the underlying Li+-transport mechanism is still unclear. Focusing on copper hexacyanoferrate (CuHCF), a PBA that exhibits static Jahn-Teller (JT) distortion, we theoretically investigate how the framework's distortion affects the pathways and energetics of the Li+ transport. Density functional theory calculations of a local structure model of CuHCF reveal that the static JT distortion makes the favorable Li+-transport pathways quasi-two-dimensional, contrary to an intuitive picture of isotropic Li+ diffusion within the regular jungle-gym framework. The pathways are mutually interconnected, thereby creating an almost barrierless transport network. To better understand the distortion-induced transport anisotropy, we visually analyze the framework's electronic structure and noncovalent Li+-framework interactions. This study helps deepen the fundamental understanding of intrinsic Li+-transport properties of a distorted porous framework.
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Affiliation(s)
- Dan Ito
- Faculty of Science, Yamagata University, 1-4-12 Kojirakawa-machi, Yamagata 990-8560, Japan
| | - Yoshihide Nakao
- Faculty of Life Science, Kyushu Sangyo University, 2-3-1 Matsukadai, Higashi-ku, Fukuoka 813-8503, Japan
| | - Manabu Ishizaki
- Faculty of Science, Yamagata University, 1-4-12 Kojirakawa-machi, Yamagata 990-8560, Japan
| | - Masato Kurihara
- Faculty of Science, Yamagata University, 1-4-12 Kojirakawa-machi, Yamagata 990-8560, Japan
| | - Hideo Ando
- Faculty of Science, Yamagata University, 1-4-12 Kojirakawa-machi, Yamagata 990-8560, Japan
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Dhimba G, Muller A, Lammertsma K. Racemization Pathway for MoO 2(acac) 2 Favored over Ray-Dutt, Bailar, and Conte-Hippler Twists. Inorg Chem 2022; 61:14918-14923. [PMID: 35980189 PMCID: PMC9516665 DOI: 10.1021/acs.inorgchem.2c00824] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chiral cis-MoO2(acac)2 racemizes via four pathways that agree with and extend upon Muetterties' topological analysis for dynamic MX2(chel)2 complexes. Textbook Ray-Dutt and Bailar twists are the least favored with barriers of 27.5 and 28.7 kcal/mol, respectively. Rotating both acac ligands of the Bailar structure by 90° gives the lower Conte-Hippler twist (20.0 kcal/mol), which represents a valley-ridge inflection that invokes the trans isomer. The most favorable is a new twist that was found by 90° rotation of only one acac ligand of the Bailar structure. The gas-phase barrier of 17.4 kcal/mol for this Dhimba-Muller-Lammertsma twist further decreases upon inclusion of the effects of solvents to 16.3 kcal/mol (benzene), 16.2 kcal/mol (toluene), and 15.4 kcal/mol (chloroform), which are in excellent agreement with the reported experimental values.
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Affiliation(s)
- George Dhimba
- Department of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg 2006, South Africa
| | - Alfred Muller
- Department of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg 2006, South Africa
| | - Koop Lammertsma
- Department of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg 2006, South Africa.,Department of Chemistry and Pharmaceutical Sciences, Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, Amsterdam 1081 HZ, The Netherlands
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8
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Insights into the Capture of CO2 by Nickel Hydride Complexes. Catalysts 2022. [DOI: 10.3390/catal12070790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
As a desired feedstock for sustainable energy source and for chemical synthesis, the capture and utilization of CO2 have attracted chemists’ continuous efforts. The homogeneous CO2 insertion into a nickel hydride complex to generate formate provides insight into the role of hydrogen as an active hydride form in the hydrogenation of CO2, which serves as a practicable approach for CO2 utilization. To parameterize the activities and to model the structure–activity relationship in the CO2 insertion into nickel hydride, the comprehensive mechanism of CO2 insertion into a series of square planar transition metal hydride (TM–H, TM = Ni, Pd, and Co) complexes was investigated using density functional theory (DFT) computations. The stepwise pathway with the TM-(H)-formate intermediate for the CO2 insertion into all seven square planar transition metal hydride (TM–H) complexes was observed. The overall rate-determining step (RDS) was the nucleophilic attraction of the terminal O atom on the Ni center in Ni-(H)-formate to form Ni-(O)-(exo)formate. The charge of the Ni atom in the axially vacant [Ni]+ complex was demonstrated as the dominant factor in CO2 insertion, which had an excellent linear correction (R2 = 0.967) with the Gibbs barrier (ΔG‡) of the RDS. The parameterized activities and modeled structure–activity relationship provided here light the way to the design of a more efficient Ni–H complex in the capture and utilization of CO2.
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9
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Structures and Bonding in Hexacarbonyl Diiron Polyenes: Cycloheptatriene and 1,3,5-Cyclooctatriene. CHEMISTRY 2022. [DOI: 10.3390/chemistry4020033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Structural preferences of (1,3,5-cyclooctatriene) hexacarbonyl diiron [(C8H10)Fe2(CO)6] and cycloheptatriene hexacarbonyl diiron [(C7H8)Fe2(CO)6] were explored using density functional theory (DFT) computations. DFT computations together with experimental results demonstrated that structure with the [η3, (η1, η2)] mode is the preferred structure in (C8H10)Fe2(CO)6, and the [η3,η3] mode is preferred in (C7H8)Fe2(CO)6. For (C8H10)Fe2(CO)6, the conversion between the structures with [η3, (η1, η2)] mode and the [η3, η3] mode is prevented by the relatively high activation barrier. (C8H10)Fe2(CO)6 is indicated as a fluxional molecule with a Gibbs free energy of activation of 8.5 kcal/mol for its ring flicking process, and an excellent linear correlation (R2 = 0.9909) for the DFT simulated 1H-NMR spectra was obtained. Results provided here will develop the understanding on the structures of other polyene analogs.
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10
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Oxorhenium(V) complexes with a benzyldithiocarbazate ligand: synthesis, crystal structure, spectroscopic and DFT analyses. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Das S, Nugegoda D, Yao W, Qu F, Figgins MT, Lamb RW, Webster CE, Delcamp JH, Papish ET. Sensitized and Self‐Sensitized Photocatalytic Carbon Dioxide Reduction Under Visible Light with Ruthenium Catalysts Shows Enhancements with More Conjugated Pincer Ligands. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202101016] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sanjit Das
- The University of Alabama Chemistry UNITED STATES
| | | | - Wenzhi Yao
- The University of Alabama Chemistry UNITED STATES
| | - Fengrui Qu
- The University of Alabama Chemistry UNITED STATES
| | | | | | | | | | - Elizabeth T Papish
- University of Alabama Chemistry 250 Hackberry Lane 35401 Tuscaloosa UNITED STATES
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12
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Zhang X, Shi H, Ji C, Wang J, Jiang L. Computational exploration for possible reaction pathways, regioselectivity, and influence of substrate in gold-catalyzed cycloaddition of cyanamides with enynamides. RSC Adv 2022; 12:22939-22945. [PMID: 36105958 PMCID: PMC9377310 DOI: 10.1039/d2ra02682a] [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: 04/27/2022] [Accepted: 07/18/2022] [Indexed: 11/30/2022] Open
Abstract
The current work focuses on the DFT calculation of the rational mechanism and catalytic activity of the gold(i)-catalyzed isotetradehydro-Diels–Alder cycloaddition of cyanamides and enamides to substituted 2,6-diaminopyridines. IPrAuCl is used as a model catalyst to catalyze cyanamide and enynamide reactants with different substituents in DCM as a research system. DFT data indicates that the catalytic cycle starts from the triple bond coordination between the catalyst's gold cation and the enamide to obtain the gold π-complex, and the cyanamide attacks the alkynyl carbon atom from different directions to generate two reaction channels of five-membered and six-membered heterocycles, respectively. The calculation results show that the 2,6-diaminopyridine compounds produced by this catalytic reaction have lower activation energy and higher reactivity, that is, the pyridine skeleton structure can be easily obtained under mild reaction conditions. At the same time, electron-withdrawing substituents in the reactants are more helpful for the reaction. In addition to being in good agreement with the experimental data, the calculated results also provide an important contribution to the further understanding of the mechanism of such reactions. The current work focuses on the DFT calculation of the rational mechanism and catalytic activity of the gold(i)-catalyzed isotetradehydro-Diels–Alder cycloaddition of cyanamides and enamides to substituted 2,6-diaminopyridines.![]()
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Affiliation(s)
- Xinghui Zhang
- School of Chemical Engineering, Lanzhou University of Arts and Science, Lanzhou 730010, China
| | - Haixiong Shi
- School of Chemical Engineering, Lanzhou University of Arts and Science, Lanzhou 730010, China
| | - Caihong Ji
- School of Chemical Engineering, Lanzhou University of Arts and Science, Lanzhou 730010, China
| | - Jianyi Wang
- School of Chemical Engineering, Lanzhou University of Arts and Science, Lanzhou 730010, China
| | - Liping Jiang
- School of Chemical Engineering, Lanzhou University of Arts and Science, Lanzhou 730010, China
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13
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Oladipupo O, Brown SR, Lamb RW, Gray JL, Cameron CG, DeRegnaucourt AR, Ward NA, Hall JF, Xu Y, Petersen CM, Qu F, Shrestha AB, Thompson MK, Bonizzoni M, Webster CE, McFarland SA, Kim Y, Papish ET. Light-responsive and Protic Ruthenium Compounds Bearing Bathophenanthroline and Dihydroxybipyridine Ligands Achieve Nanomolar Toxicity towards Breast Cancer Cells. Photochem Photobiol 2022; 98:102-116. [PMID: 34411308 PMCID: PMC8810589 DOI: 10.1111/php.13508] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 08/16/2021] [Indexed: 01/03/2023]
Abstract
We report new ruthenium complexes bearing the lipophilic bathophenanthroline (BPhen) ligand and dihydroxybipyridine (dhbp) ligands which differ in the placement of the OH groups ([(BPhen)2 Ru(n,n'-dhbp)]Cl2 with n = 6 and 4 in 1A and 2A , respectively). Full characterization data are reported for 1A and 2A and single crystal X-ray diffraction for 1A . Both 1A and 2A are diprotic acids. We have studied 1A , 1B , 2A , and 2B (B = deprotonated forms) by UV-vis spectroscopy and 1 photodissociates, but 2 is light stable. Luminescence studies reveal that the basic forms have lower energy 3 MLCT states relative to the acidic forms. Complexes 1A and 2A produce singlet oxygen with quantum yields of 0.05 and 0.68, respectively, in acetonitrile. Complexes 1 and 2 are both photocytotoxic toward breast cancer cells, with complex 2 showing EC50 light values as low as 0.50 μM with PI values as high as >200 vs. MCF7. Computational studies were used to predict the energies of the 3 MLCT and 3 MC states. An inaccessible 3 MC state for 2B suggests a rationale for why photodissociation does not occur with the 4,4'-dhbp ligand. Low dark toxicity combined with an accessible 3 MLCT state for 1 O2 generation explains the excellent photocytotoxicity of 2.
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Affiliation(s)
- Olaitan Oladipupo
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Spenser R. Brown
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Robert W. Lamb
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA.,Oak Ridge Institute for Science and Education, Oak Ridge, TN 37830, USA
| | - Jessica L. Gray
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Colin G. Cameron
- Department of Chemistry and Biochemistry, University of Texas Arlington, Arlington, TX 76019, USA
| | - Alexa R. DeRegnaucourt
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Nicholas A. Ward
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - James Fletcher Hall
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Yifei Xu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Courtney M. Petersen
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Fengrui Qu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Ambar B. Shrestha
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Matthew K. Thompson
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Marco Bonizzoni
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Charles Edwin Webster
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA.,Corresponding Authors’: (Charles Edwin Webster), (Sherri A. McFarland), (Yonghyun Kim), (Elizabeth T. Papish)
| | - Sherri A. McFarland
- Department of Chemistry and Biochemistry, University of Texas Arlington, Arlington, TX 76019, USA.,Corresponding Authors’: (Charles Edwin Webster), (Sherri A. McFarland), (Yonghyun Kim), (Elizabeth T. Papish)
| | - Yonghyun Kim
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.,Corresponding Authors’: (Charles Edwin Webster), (Sherri A. McFarland), (Yonghyun Kim), (Elizabeth T. Papish)
| | - Elizabeth T. Papish
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, AL 35487, USA.,Corresponding Authors’: (Charles Edwin Webster), (Sherri A. McFarland), (Yonghyun Kim), (Elizabeth T. Papish)
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14
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Lei Y, Jiang J, Li X, Li Q, Li C. A nine‐coordinated bismuth(III) Schiff‐base complex: Design, synthesis, computational studies, and antimicrobial activity. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6523] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yan‐Hua Lei
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou Hunan Province China
| | - Jian‐Hong Jiang
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou Hunan Province China
| | - Xu Li
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou Hunan Province China
| | - Qiang‐Guo Li
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou Hunan Province China
| | - Chuan‐Hua Li
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou Hunan Province China
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15
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Gao P, Cai XP, Xie Q, Yang Q, Ou H, Wu WQ, Xu X, Xu Z, Lin X. Theoretical Studies on the Structures of Metal String Complexes Cr n(L) 4Cl 2 ( n = 3, 5, 7; L = Oligo-α-Pyridylamide) under the Effect of an Electric Field. Inorg Chem 2021; 60:9378-9386. [PMID: 34137268 DOI: 10.1021/acs.inorgchem.1c00206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To study the electronic structures and properties of [Crn(L)4Cl2] (n = 3, L = dpa: di(2-pyridyl)amido; n = 5, L = tpda: tripyridyldiamido; n = 7, L = teptra: tetrapyridyltriamine) metal string complexes, the BP86 method was used by considering the influence of the electric field (EF) applied parallel to the metal axis. As the EF increases, the migration of more positively charged Crodd is more significant than that of Creven, which results in alternating long-short Cr-Cr bonds. This happens because of the natural charges on the Crodd of 1-3, which are more electropositive than those on Creven. The electrons are pulled to the Cr and Cl(r) atoms at the high-potential side from Cl(l) at the low-potential side by the EF, which leads to asymmetrical FMOs. After the critical electric field (Ec), the configuration turns into a remarkably asymmetric one with alternating Cr-Cr quadruple bonds and weak interactions. The electrons are transferred from equatorial ligands (L) to metal chains. In the meantime, the asymmetry of the FMOs increases and the delocalization is further reduced, which affects the conductivity. Especially for [Cr7(teptra)4Cl2], the delocalized electrons of HOMO are completely transformed into a localized model after the critical electric field. It is observed that this supports the electric switching phenomenon ascribed to the conformations of delocalized and localized electrons. In addition, the longer the length of the metal chain, the smaller the Ec and the easier is for the complexes to be polarized by the EF.
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Affiliation(s)
- Pan Gao
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Xue-Ping Cai
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Qiongyi Xie
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Qingyun Yang
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Hong Ou
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Wei-Qing Wu
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Xuan Xu
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Zhiguang Xu
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
| | - Xiaoming Lin
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
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16
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Jiang J, Lei Y, Ou Y, Li X, Pi Y, Ye L, Li Q, Li C. Synthesis, crystal structure, density functional theory calculations, and antimicrobial activity of silver(I) complex derived from 2‐aminobenzothiazole ligand. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6226] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jian‐Hong Jiang
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou China
| | - Yan‐Hua Lei
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou China
| | - Yang‐Hao Ou
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou China
| | - Xu Li
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou China
| | - Yi‐Yuan Pi
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou China
| | - Li‐Juan Ye
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou China
| | - Qiang‐Guo Li
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou China
| | - Chuan‐Hua Li
- Hunan Provincial Key Laboratory of Xiangnan Rare‐Precious Metals Compounds and Applications, College of Chemical Biology and Environmental Engineering Xiangnan University Chenzhou China
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17
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Su YQ, Xia GJ, Qin Y, Ding S, Wang YG. Lattice oxygen self-spillover on reducible oxide supported metal cluster: the water-gas shift reaction on Cu/CeO 2 catalyst. Chem Sci 2021; 12:8260-8267. [PMID: 34194718 PMCID: PMC8208302 DOI: 10.1039/d1sc01201k] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 05/11/2021] [Indexed: 11/21/2022] Open
Abstract
In this work we have tackled one of the most challenging problems in nanocatalysis namely understanding the role of reducible oxide supports in metal catalyzed reactions. As a prototypical example, the very well-studied water gas shift reaction catalyzed by CeO2 supported Cu nanoclusters is chosen to probe how the reducible oxide support modifies the catalyst structures, catalytically active sites and even the reaction mechanisms. By employing density functional theory calculations in conjunction with a genetic algorithm and ab initio molecular dynamics simulations, we have identified an unprecedented spillover of the surface lattice oxygen from the ceria support to the Cu cluster, which is rarely considered previously but may widely exist in oxide supported metal catalysts under realistic conditions. The oxygen spillover causes a highly energetic preference of the monolayered configuration of the supported Cu nanocluster, compared to multilayered configurations. Due to the strong metal-oxide interaction, after the O spillover the monolayered cluster is highly oxidized by transferring electrons to the Ce 4f orbitals. The water-gas-shift reaction is further found to more favorably take place on the supported copper monolayer than the copper-ceria periphery, where the on-site oxygen and the adjacent oxidized Cu sites account for the catalytically active sites, synergistically facilitating the water dissociation and the carboxyl formation. The present work provides mechanistic insights into the strong metal-support interaction and its role in catalytic reactions, which may pave a way towards the rational design of metal-oxide catalysts with promising stability, dispersion and catalytic activity.
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Affiliation(s)
- Ya-Qiong Su
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen Guangdong 518055 China
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University Xi'an 710049 China
- Laboratory of Inorganic Materials and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology P. O. Box 513 5600 MB Eindhoven The Netherlands
| | - Guang-Jie Xia
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen Guangdong 518055 China
| | - Yanyang Qin
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University Xi'an 710049 China
| | - Shujiang Ding
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University Xi'an 710049 China
| | - Yang-Gang Wang
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen Guangdong 518055 China
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18
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Jiang JH, Lei YH, Li X, Pi Y, Zhu H, Li QG, Li CH. New cobalt(II) Schiff base complex: Synthesis, characterization, DFT calculation and antimicrobial activity. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2020.108350] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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19
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Frey NC, Dornshuld EV, Webster CE. Benchmarking the Fluxional Processes of Organometallic Piano-Stool Complexes. Molecules 2021; 26:2310. [PMID: 33923446 PMCID: PMC8073612 DOI: 10.3390/molecules26082310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/09/2021] [Accepted: 04/13/2021] [Indexed: 11/16/2022] Open
Abstract
The correlation consistent Composite Approach for transition metals (ccCA-TM) and density functional theory (DFT) computations have been applied to investigate the fluxional mechanisms of cyclooctatetraene tricarbonyl chromium ((COT)Cr(CO)3) and 1,3,5,7-tetramethylcyclooctatetraene tricarbonyl chromium, molybdenum, and tungsten ((TMCOT)M(CO)3 (M = Cr, Mo, and W)) complexes. The geometries of (COT)Cr(CO)3 were fully characterized with the PBEPBE, PBE0, B3LYP, and B97-1 functionals with various basis set/ECP combinations, while all investigated (TMCOT)M(CO)3 complexes were fully characterized with the PBEPBE, PBE0, and B3LYP methods. The energetics of the fluxional dynamics of (COT)Cr(CO)3 were examined using the correlation consistent Composite Approach for transition metals (ccCA-TM) to provide reliable energy benchmarks for corresponding DFT results. The PBE0/BS1 results are in semiquantitative agreement with the ccCA-TM results. Various transition states were identified for the fluxional processes of (COT)Cr(CO)3. The PBEPBE/BS1 energetics indicate that the 1,2-shift is the lowest energy fluxional process, while the B3LYP/BS1 energetics (where BS1 = H, C, O: 6-31G(d'); M: mod-LANL2DZ(f)-ECP) indicate the 1,3-shift having a lower electronic energy of activation than the 1,2-shift by 2.9 kcal mol-1. Notably, PBE0/BS1 describes the (CO)3 rotation to be the lowest energy process, followed by the 1,3-shift. Six transition states have been identified in the fluxional processes of each of the (TMCOT)M(CO)3 complexes (except for (TMCOT)W(CO)3), two of which are 1,2-shift transition states. The lowest-energy fluxional process of each (TMCOT)M(CO)3 complex (computed with the PBE0 functional) has a ΔG‡ of 12.6, 12.8, and 13.2 kcal mol-1 for Cr, Mo, and W complexes, respectively. Good agreement was observed between the experimental and computed 1H-NMR and 13C-NMR chemical shifts for (TMCOT)Cr(CO)3 and (TMCOT)Mo(CO)3 at three different temperature regimes, with coalescence of chemically equivalent groups at higher temperatures.
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Affiliation(s)
| | | | - Charles Edwin Webster
- Department of Chemistry, Mississippi State University, 310 President’s Circle, Starkville, MS 39762-9573, USA; (N.C.F.); (E.V.D.)
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20
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Charles RM, Taylor NS, Mercado AA, Frost CE, Yokley TW, Eckenhoff WT, Schley ND, DeYonker NJ, Brewster TP. Systematic evaluation of the electronic effect of aluminum-containing ligands in iridium-aluminum and rhodium-aluminum bimetallic complexes. Dalton Trans 2020; 49:13029-13043. [PMID: 32915181 PMCID: PMC7530109 DOI: 10.1039/d0dt02472d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2024]
Abstract
Pyridinemethanolate and oxyquinoline derivatives of previously reported late transition metal-aluminum heterobimetallic complexes containing iridium and rhodium have been synthesized and characterized. A combination of experimental and computational data permits a direct comparison of the electronic effects of each novel aluminum-containing ligand in our library on the late transition metal centers. Alongside electronic data of previously reported oxypyridine bridged systems, we conclude that the addition of a dialkylaluminum(X) (X = anion) fragment does not significantly perturb the electron donor ability of the bridging ligand. Anions bound to the aluminum are also shown to behave similarly. The overall library, thus, suggests that the best predictor of the electron donor ability of an alkylaluminum-containing ligand to a transition metal is the donor power of the bridging ligand.
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Affiliation(s)
- R Malcolm Charles
- Department of Chemistry, The University of Memphis, 3744 Walker Avenue, Smith Chemistry Building, Memphis, Tennessee 38152, USA.
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21
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Shirley H, Figgins MT, Boudreaux CM, Liyanage NP, Lamb RW, Webster CE, Papish ET, Delcamp JH. Impact of the Dissolved Anion on the Electrocatalytic Reduction of CO
2
to CO with Ruthenium CNC Pincer Complexes. ChemCatChem 2020. [DOI: 10.1002/cctc.202000742] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hunter Shirley
- Department of Chemistry and Biochemistry Coulter Hall The University of Mississippi MS 38677 USA
| | - Matthew T. Figgins
- Department of Chemistry Hand Lab Mississippi State University Mississippi MS 39762 USA
| | - Chance M. Boudreaux
- Department of Chemistry and Biochemistry Shelby Hall The University of Alabama Tuscaloosa AL 35487 USA
| | - Nalaka P. Liyanage
- Department of Chemistry and Biochemistry Coulter Hall The University of Mississippi MS 38677 USA
| | - Robert W. Lamb
- Department of Chemistry Hand Lab Mississippi State University Mississippi MS 39762 USA
| | - Charles Edwin Webster
- Department of Chemistry Hand Lab Mississippi State University Mississippi MS 39762 USA
| | - Elizabeth T. Papish
- Department of Chemistry and Biochemistry Shelby Hall The University of Alabama Tuscaloosa AL 35487 USA
| | - Jared H. Delcamp
- Department of Chemistry and Biochemistry Coulter Hall The University of Mississippi MS 38677 USA
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22
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Dulong C, Madebene B, Monti S, Richardi J. Optimization of a New Reactive Force Field for Silver-Based Materials. J Chem Theory Comput 2020; 16:7089-7099. [DOI: 10.1021/acs.jctc.0c00480] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Clement Dulong
- CNRS, De la Molécule aux Nano-Objets: Réactivité, Interactions Spectroscopies, MONARIS, Sorbonne Université, 75005, Paris, France
| | - Bruno Madebene
- CNRS, De la Molécule aux Nano-Objets: Réactivité, Interactions Spectroscopies, MONARIS, Sorbonne Université, 75005, Paris, France
| | - Susanna Monti
- Institute of Chemistry of Organometallic Compounds, CNR-ICCOM, via G. Moruzzi 1, I-56124 Pisa, Italy
| | - Johannes Richardi
- CNRS, Laboratoire de Chimie Théorique, LCT, Sorbonne Université, 75005 Paris, France
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23
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Das S, Nugegoda D, Qu F, Boudreaux CM, Burrow PE, Figgins MT, Lamb RW, Webster CE, Delcamp JH, Papish ET. Structure Function Relationships in Ruthenium Carbon Dioxide Reduction Catalysts with CNC Pincers Containing Donor Groups. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000444] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sanjit Das
- Department of Chemistry and Biochemistry, Shelby Hall The University of Alabama 35487 Tuscaloosa AL USA
| | - Dinesh Nugegoda
- Department of Chemistry and Biochemistry, Coulter Hall The University of Mississippi 38677 University MS USA
| | - Fengrui Qu
- Department of Chemistry and Biochemistry, Shelby Hall The University of Alabama 35487 Tuscaloosa AL USA
| | - Chance M. Boudreaux
- Department of Chemistry and Biochemistry, Shelby Hall The University of Alabama 35487 Tuscaloosa AL USA
| | - Phillip E. Burrow
- Department of Chemistry and Biochemistry, Coulter Hall The University of Mississippi 38677 University MS USA
| | - Matthew T. Figgins
- Department of Chemistry, Hand Lab Mississippi State University 39762 Mississippi State MS USA
| | - Robert W. Lamb
- Department of Chemistry, Hand Lab Mississippi State University 39762 Mississippi State MS USA
| | - Charles Edwin Webster
- Department of Chemistry, Hand Lab Mississippi State University 39762 Mississippi State MS USA
| | - Jared H. Delcamp
- Department of Chemistry and Biochemistry, Coulter Hall The University of Mississippi 38677 University MS USA
| | - Elizabeth T. Papish
- Department of Chemistry and Biochemistry, Shelby Hall The University of Alabama 35487 Tuscaloosa AL USA
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24
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Charles RM, Tupkar H, Helland SD, Mercado AA, Eckenhoff WT, Schley ND, DeYonker NJ, Brewster TP. Synthesis and Electronic Characterization of Iridium‐Aluminum and Rhodium‐Aluminum Heterobimetallic Complexes Bridged by 3‐Oxypyridine and 4‐Oxypyridine. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.201901317] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- R. Malcolm Charles
- Department of Chemistry The University of Memphis 3744 Walker Avenue, Smith Chemistry Building 38152 Memphis Tennessee USA
| | - Hrishikesh Tupkar
- Department of Chemistry The University of Memphis 3744 Walker Avenue, Smith Chemistry Building 38152 Memphis Tennessee USA
| | - Sarah D. Helland
- Department of Chemistry Rhodes College 2000 N. Parkway 38112 Memphis Tennessee USA
| | - Angel A. Mercado
- Department of Chemistry The University of Memphis 3744 Walker Avenue, Smith Chemistry Building 38152 Memphis Tennessee USA
| | - William T. Eckenhoff
- Department of Chemistry Rhodes College 2000 N. Parkway 38112 Memphis Tennessee USA
| | - Nathan D. Schley
- Department of Chemistry Vanderbilt University 37235 Nashville Tennessee USA
| | - Nathan J. DeYonker
- Department of Chemistry The University of Memphis 3744 Walker Avenue, Smith Chemistry Building 38152 Memphis Tennessee USA
| | - Timothy P. Brewster
- Department of Chemistry The University of Memphis 3744 Walker Avenue, Smith Chemistry Building 38152 Memphis Tennessee USA
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25
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The mechanism study on Pd(0)-catalyzed cyclization of alkynols. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2019.112665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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26
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Todisco S, Latronico M, Gallo V, Re N, Marrone A, Tolbatov I, Mastrorilli P. Double addition of phenylacetylene onto the mixed bridge phosphinito-phosphanido Pt(i) complex [(PHCy 2)Pt(μ-PCy 2){κ 2P,O-μ-P(O)Cy 2}Pt(PHCy 2)](Pt-Pt). Dalton Trans 2020; 49:6776-6789. [PMID: 32374320 DOI: 10.1039/d0dt00923g] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of the dinuclear phosphinito bridged complex [(PHCy2)Pt(μ-PCy2){κ2P,O-μ-P(O)Cy2}Pt(PHCy2)](Pt-Pt) (1) with phenylacetylene affords the η1-alkenyl-μ,η1:η2-alkynyl complex [(η1-trans-(Ph)HC[double bond, length as m-dash]CH)(PHCy2)Pt(μ-PCy2)(μ,η1:η2-PhC[triple bond, length as m-dash]C)Pt{κP-P(O)Cy2}(PHCy2)] (4) displaying a σ-bonded 2-phenylethenyl ligand and an alkynyl (μ-κCα:η2) bridge between the platinum atoms. Complex 4 was shown to form in two steps: initially, the attack of the first molecule of phenylacetylene gives the σ-acetylide complex [(PHCy2)(η1-PhC[triple bond, length as m-dash]C)Pt1(μ-PCy2)Pt2(PHCy2){κP-P(OH)Cy2}](Pt-Pt) (5) featuring an intramolecular π-type hydrogen bond between the POH and the C[triple bond, length as m-dash]C triple bond; fast reaction of 5 with a second molecule of phenylacetylene results in the oxidative addition of the terminal C-H bond of the second alkyne to Pt1 that, after rearrangements, leads to 4. When left in solution for two weeks, complex 4 spontaneously isomerizes completely to [(PHCy2)(η1-trans-(Ph)HC[double bond, length as m-dash]CH)Pt(μ-PCy2){κ2P,O-μ-P(O)Cy2}Pt(η1-PhC[triple bond, length as m-dash]C)(PHCy2)] (7) displaying a 2-phenylethenyl ligand and a phenylethynyl group both σ-bonded to the metal. Density functional calculations at the B3LYP/LACV3P++**//DFT/LACVP* level were carried out to study the thermodynamics of the formation of all considered complexes and to trace the mechanism of formation of the observed products.
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Affiliation(s)
- Stefano Todisco
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari, via Orabona 4, I-70125 Bari, Italy.
| | - Mario Latronico
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari, via Orabona 4, I-70125 Bari, Italy.
| | - Vito Gallo
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari, via Orabona 4, I-70125 Bari, Italy.
| | - Nazzareno Re
- Dipartimento di Farmacia, Università di Chieti, Italy.
| | | | | | - Piero Mastrorilli
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari, via Orabona 4, I-70125 Bari, Italy.
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27
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Omary MA, Determan JJ, Palehepitiya Gamage CS, Sinha P, Li S, Patterson MR, Nestero VN, Wilson AK, Rasika Dias HV. Is a High Photoluminescence Quantum Yield Good Enough for OLEDs? Can Luminescence Rigidochromism Be Manifest in the Solid State? an Optoelectronic Device Screening Case Study for Diphosphine/Pyrazolate Copper(I) Complexes. COMMENT INORG CHEM 2019. [DOI: 10.1080/02603594.2019.1701448] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Mohammad A. Omary
- Department of Chemistry, University of North Texas, Denton, Texas, USA
| | - John J. Determan
- Department of Chemistry, Western Illinois University, Macomb, Illinois, USA
| | | | - Pankaj Sinha
- Department of Chemistry, University of North Texas, Denton, Texas, USA
| | - Shan Li
- Department of Chemistry, University of North Texas, Denton, Texas, USA
| | - Monika R. Patterson
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas, USA
| | | | - Angela K. Wilson
- Department of Chemistry, University of North Texas, Denton, Texas, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan, USA
| | - H. V. Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas, USA
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28
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Supramolecular structures in oxovanadium(IV) compounds with pyrid-2-one and pyrid-4-one ligands. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.05.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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29
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Xia GJ, Liu J, Liu ZF. Structural inhomogeneity as a factor promoting the homogenous catalysis of CO 2 hydrogenation by (PMe 3) 4RuH 2. Phys Chem Chem Phys 2019; 21:19252-19268. [PMID: 31441925 DOI: 10.1039/c9cp03288f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
During homogenous catalysis by organometallic complexes, the dissociation of a ligand to produce an unsaturated site on the metal center is often invoked as the first step of activation, especially when photo-excitation is involved. In this theoretical study, we demonstrated that under mild conditions, a thermodynamically unstable yet dynamically favorable active intermediate could be produced by the inhomogeneity of the solvent distribution around the catalyst rather than by ligand dissociation. This occurred at the end of the first catalytic cycle when the product was eliminated. The empty site was immediately filled by one of the additive molecules aggregated around the reaction center even when the intermediate complex was unstable, producing a transient and more active catalyst. This process accounted for the accelerated reaction rate observed in the landmark CO2 hydrogenation catalyzed by (PMe3)4RuH2 in supercritical CO2 when H2O, MeOH, or HNMe2 was added. This also suggests a new way to exploit the structural inhomogeneity around an organometallic complex for the design of superior catalysts.
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Affiliation(s)
- Guang-Jie Xia
- Department of Chemistry and Centre for Scientific Modeling and Computation Chinese University of Hong Kong, Shatin, Hong Kong, China.
| | - Jianwen Liu
- College of Materials Science and Engineering, Shenzhen University, Shenzhen, China
| | - Zhi-Feng Liu
- Department of Chemistry and Centre for Scientific Modeling and Computation Chinese University of Hong Kong, Shatin, Hong Kong, China.
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30
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Charles III RM, Yokley TW, Schley ND, DeYonker NJ, Brewster TP. Hydrogen Activation and Hydrogenolysis Facilitated By Late-Transition-Metal–Aluminum Heterobimetallic Complexes. Inorg Chem 2019; 58:12635-12645. [DOI: 10.1021/acs.inorgchem.9b01359] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- R. Malcolm Charles III
- Department of Chemistry, The University of Memphis, 3744 Walker Avenue, Smith Chemistry
Building, Memphis, Tennessee 38152, United States
| | - Timothy W. Yokley
- Department of Chemistry, The University of Memphis, 3744 Walker Avenue, Smith Chemistry
Building, Memphis, Tennessee 38152, United States
| | - Nathan D. Schley
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Nathan J. DeYonker
- Department of Chemistry, The University of Memphis, 3744 Walker Avenue, Smith Chemistry
Building, Memphis, Tennessee 38152, United States
| | - Timothy P. Brewster
- Department of Chemistry, The University of Memphis, 3744 Walker Avenue, Smith Chemistry
Building, Memphis, Tennessee 38152, United States
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31
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Jiang J, Liu H, Cao L, Zhao C, Liu Y, Ackermann L, Ke Z. Metallalkenyl, Metallacyclopropene, or Metallallylcarbenoid? Ru-Catalyzed Annulation between Benzoic Acid and Alkyne. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02952] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Jingxing Jiang
- School of Materials Science & Engineering, PCFM Lab, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Honghu Liu
- School of Materials Science & Engineering, PCFM Lab, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Lili Cao
- School of Materials Science & Engineering, PCFM Lab, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Cunyuan Zhao
- School of Materials Science & Engineering, PCFM Lab, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Yan Liu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammannstrasse 2, 37077 Göttingen, Germany
| | - Zhuofeng Ke
- School of Materials Science & Engineering, PCFM Lab, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, P. R. China
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32
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Thornley W, Wirick SA, Riedel-Topper M, DeYonker NJ, Bitterwolf TE, Stromberg CJ, Heilweil EJ. Photodynamics of [FeFe]-Hydrogenase Model Compounds with Bidentate Heterocyclic Ligands. J Phys Chem B 2019; 123:7137-7148. [PMID: 31334657 PMCID: PMC6857538 DOI: 10.1021/acs.jpcb.9b04675] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two asymmetrically structured model compounds for the hydrogen-generating [Fe-Fe]-hydrogenase active site were investigated to determine the ultrafast photodynamics, structural intermediates, and photoproducts compared to more common symmetric di-iron species. The bidentate-ligand-containing compounds studied were Fe2(μ-S2C3H6)(CO)4(bipy), 1, and Fe2(μ-S2C3H6)(CO)4(phen), 2, in dilute room temperature acetonitrile solution and low-temperature 2Me-THF matrix isolation using static FTIR difference and time-resolved infrared spectroscopic methods (TRIR). Ultraviolet-visible spectra were also compared to time-dependent density functional theory (TD-DFT) to ascertain the orbital origins of long wavelength electronic absorption features. The spectroscopic evidence supports the conclusions that only a propyl-bridge flip occurs in low-temperature matrix, while early time CO ejection leads to the formation of solvated isomeric species on the 25 ps time scale in room temperature solution.
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Affiliation(s)
- Wyatt Thornley
- Department of Chemistry, University of Idaho, 875 Perimeter Dr., MS 2343, Moscow, ID 83844-2343, United States
| | - Sarah A. Wirick
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD 21701-8524, United States
| | - Maximilian Riedel-Topper
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD 21701-8524, United States
| | - Nathan J. DeYonker
- Department of Chemistry, The University of Memphis, 411 Smith Hall, 3744 Walker Avenue, Memphis, TN 38152
| | - Thomas E. Bitterwolf
- Department of Chemistry, University of Idaho, 875 Perimeter Dr., MS 2343, Moscow, ID 83844-2343, United States
| | - Christopher J. Stromberg
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD 21701-8524, United States
| | - Edwin J. Heilweil
- Nanoscale Device Characterization Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899-8443 United States
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33
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Zhang H, Zhu X, Wang M, Liu BM, Huang Y, Wang J. A theoretical study of Fe(PMe3)4-catalyzed anti-Markovnikov addition of aromatics to alkenes to provide linear alkylation products. TRANSIT METAL CHEM 2019. [DOI: 10.1007/s11243-019-00338-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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Abstract
Abstract
We present adsorption processes of dinitrogen on size-selected silver cluster cations, Ag
n
+ (n = 1–10), studied by kinetics measurement using an ion trap. The cluster ions showed sequential adsorption of N2 molecules when the ion trap was cooled down to 105 K, excluding n = 8 and 9 that were exceptionally inactive at this temperature. Termolecular rate coefficients of each adsorption step are determined by analyzing time-dependent changes in the reactant and product ion signals. The first-step rate coefficients were found to increase exponentially from n = 1 to 7 due to increased internal degrees of freedom at larger sizes, which are favorable for accommodating the adsorption energy in a free cluster. In contrast, the adsorption rate turned to decrease for n > 7 due to weaker binding of dinitrogen as revealed by density-functional-theory (DFT) calculation. Adsorption sites on Ag
n
+ are further discussed on the basis of the maximum number of adsorbing N2 molecules observed in the experiment.
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35
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Wang P, Liang G, Boyd CL, Webster CE, Zhao X. Catalytic H
2
Evolution by a Mononuclear Cobalt Complex with a Macrocyclic Pentadentate Ligand. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801418] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Ping Wang
- Department of Chemistry The University of Memphis Memphis Tennessee 38152 USA
| | - Guangchao Liang
- Department of Chemistry Mississippi State University Mississippi 39762 USA
| | | | | | - Xuan Zhao
- Department of Chemistry The University of Memphis Memphis Tennessee 38152 USA
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36
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Ye Z, Huang X, Shao Y, Jiang J, Qu LB, Zhao C, Ke Z. One catalyst, multiple processes: ligand effects on chemoselective control in Ru-catalyzed anti-Markovnikov reductive hydration of terminal alkynes. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02437e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The ligand effect through kinetic and thermodynamic control on the chemoselectivity of one-catalyst multi-step catalysis.
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Affiliation(s)
- Zongren Ye
- School of Materials Science & Engineering
- PCFM Lab
- School of Chemistry
- Sun Yat-sen University
- Guangzhou 510275
| | - Xiao Huang
- School of Materials Science & Engineering
- PCFM Lab
- School of Chemistry
- Sun Yat-sen University
- Guangzhou 510275
| | - Youxiang Shao
- School of Materials Science & Engineering
- PCFM Lab
- School of Chemistry
- Sun Yat-sen University
- Guangzhou 510275
| | - Jingxing Jiang
- School of Materials Science & Engineering
- PCFM Lab
- School of Chemistry
- Sun Yat-sen University
- Guangzhou 510275
| | - Ling-Bo Qu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- People's Republic of China
| | - Cunyuan Zhao
- School of Materials Science & Engineering
- PCFM Lab
- School of Chemistry
- Sun Yat-sen University
- Guangzhou 510275
| | - Zhuofeng Ke
- School of Materials Science & Engineering
- PCFM Lab
- School of Chemistry
- Sun Yat-sen University
- Guangzhou 510275
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37
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Shu S, Huang M, Jiang J, Qu LB, Liu Y, Ke Z. Catalyzed or non-catalyzed: chemoselectivity of Ru-catalyzed acceptorless dehydrogenative coupling of alcohols and amines via metal–ligand bond cooperation and (de)aromatization. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00243j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanistic origin of the chemoselectivity for Ru-catalyzed acceptorless coupling of amines and alcohols.
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Affiliation(s)
- Siwei Shu
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Meijie Huang
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Jingxing Jiang
- School of Materials Science and Engineering
- PCFM Lab
- Sun Yat-sen University
- Guangzhou 510275
- P. R. China
| | - Ling-Bo Qu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Yan Liu
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Zhuofeng Ke
- School of Materials Science and Engineering
- PCFM Lab
- Sun Yat-sen University
- Guangzhou 510275
- P. R. China
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38
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Sun L, Shu S, Zhou Y, Hou S, Liu Y, Ke Z. Regulating the Optoelectronic Properties of Nickel Dithiolene by the Substituents: A Theoretical Study. MATERIALS 2018; 11:ma11112192. [PMID: 30404162 PMCID: PMC6265744 DOI: 10.3390/ma11112192] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 10/29/2018] [Accepted: 11/01/2018] [Indexed: 11/16/2022]
Abstract
Dithiolene-based complexes show great potential to be applied as materials for organic optoelectronic devices. In this study, we theoretically designed a series of complexes based on nickel dithiolene and its substituted derivatives, the optoelectronic properties of which were comparatively studied by density functional theory (DFT)/time-dependent density functional theory (TD-DFT). The results show that the charge injection property of nickel dithiolene complexes can be significantly improved with introduction of electron-withdrawing groups. The charge transportation property of nickel dithiolene depends on the conjugation degree of the system. The energy gaps between highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) are determined by the substituents, which makes the maximum absorption wavelength red-shift from the visible to the near-infrared (NIR) region. The electron density difference graph shows that the electron transition from the ground state to the first excited state is assigned to π-π* transition mainly from HOMO to LUMO. The regularity of substituent effect revealed by us in this study will shed light on the application of nickel dithiolenes as potential optoelectronic materials.
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Affiliation(s)
- Lili Sun
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China.
| | - Siwei Shu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
| | - Yi Zhou
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China.
| | - Sen Hou
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China.
| | - Yan Liu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
| | - Zhuofeng Ke
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China.
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39
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Denny JA, Lamb RW, Reilly SW, Donnadieu B, Webster CE, Hollis TK. Investigation of metallation/transmetallation reactions to synthesize a series of CCC–NHC Co pincer complexes and their X-ray structures. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.05.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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Liang G, Webster CE. The missing agostomer in the fluxionality of cyclohexenylmanganese tricarbonyl. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.02.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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41
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Liang G, Hollis TK, Webster CE. Computational Analysis of the Intramolecular Oxidative Amination of an Alkene Catalyzed by the Extreme π-Loading N-Heterocyclic Carbene Pincer Tantalum(V) Bis(imido) Complex. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00097] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guangchao Liang
- Department of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762-9573, United States
| | - T. Keith Hollis
- Department of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762-9573, United States
| | - Charles Edwin Webster
- Department of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762-9573, United States
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42
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Singh RK, Iwasa T, Taketsugu T. Insights into geometries, stabilities, electronic structures, reactivity descriptors, and magnetic properties of bimetallic Ni m Cu n-m (m = 1, 2; n = 3-13) clusters: Comparison with pure copper clusters. J Comput Chem 2018; 39:1878-1889. [PMID: 29799132 DOI: 10.1002/jcc.25361] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 04/25/2018] [Accepted: 04/28/2018] [Indexed: 11/08/2022]
Abstract
A long-range corrected density functional theory (LC-DFT) was applied to study the geometric structures, relative stabilities, electronic structures, reactivity descriptors and magnetic properties of the bimetallic NiCun-1 and Ni2 Cun-2 (n = 3-13) clusters, obtained by doping one or two Ni atoms to the lowest energy structures of Cun , followed by geometry optimizations. The optimized geometries revealed that the lowest energy structures of the NiCun-1 and Ni2 Cun-2 clusters favor the Ni atom(s) situated at the most highly coordinated position of the host copper clusters. The averaged binding energy, the fragmentation energies and the second-order energy differences signified that the Ni doped clusters can continue to gain an energy during the growth process. The electronic structures revealed that the highest occupied molecular orbital and the lowest unoccupied molecular orbital energies of the LC-DFT are reliable and can be used to predict the vertical ionization potential and the vertical electron affinity of the systems. The reactivity descriptors such as the chemical potential, chemical hardness and electrophilic power, and the reactivity principle such as the minimum polarizability principle are operative for characterizing and rationalizing the electronic structures of these clusters. Moreover, doping of Ni atoms into the copper clusters carry most of the total spin magnetic moment. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Raman K Singh
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto, 615-8245, Japan.,Department of Chemistry, Jagdam College, Chapra Jai Prakash University, Chapra, Bihar, 841301, India
| | - Takeshi Iwasa
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto, 615-8245, Japan.,Faculty of Science, Department of Chemistry, Hokkaido University, Sapporo, Hokkaido, 060-0810, Japan
| | - Tetsuya Taketsugu
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto, 615-8245, Japan.,Faculty of Science, Department of Chemistry, Hokkaido University, Sapporo, Hokkaido, 060-0810, Japan
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43
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Huckaba AJ, Shirley H, Lamb RW, Guertin S, Autry S, Cheema H, Talukdar K, Jones T, Jurss JW, Dass A, Hammer NI, Schmehl RH, Webster CE, Delcamp JH. A Mononuclear Tungsten Photocatalyst for H2 Production. ACS Catal 2018. [DOI: 10.1021/acscatal.7b04242] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Aron J. Huckaba
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Hunter Shirley
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Robert W. Lamb
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Steve Guertin
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Shane Autry
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Hammad Cheema
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Kallol Talukdar
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Tanya Jones
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Jonah W. Jurss
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Amala Dass
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Nathan I. Hammer
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Russell H. Schmehl
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Charles Edwin Webster
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Jared H. Delcamp
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
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44
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Chevrier DM, Thanthirige VD, Luo Z, Driscoll S, Cho P, MacDonald MA, Yao Q, Guda R, Xie J, Johnson ER, Chatt A, Zheng N, Zhang P. Structure and formation of highly luminescent protein-stabilized gold clusters. Chem Sci 2018; 9:2782-2790. [PMID: 29732064 PMCID: PMC5914291 DOI: 10.1039/c7sc05086k] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 02/05/2018] [Indexed: 01/31/2023] Open
Abstract
Highly luminescent gold clusters simultaneously synthesized and stabilized by protein molecules represent a remarkable category of nanoscale materials with promising applications in bionanotechnology as sensors. Nevertheless, the atomic structure and luminescence mechanism of these gold clusters are still unknown after several years of developments. Herein, we report findings on the structure, luminescence and biomolecular self-assembly of gold clusters stabilized by the large globular protein, bovine serum albumin. We highlight the surprising identification of interlocked gold-thiolate rings as the main gold structural unit. Importantly, such gold clusters are in a rigidified state within the protein scaffold, offering an explanation for their highly luminescent character. Combined free-standing cluster synthesis (without protecting protein scaffold) with rigidifying and un-rigidifying experiments, were designed to further verify the luminescence mechanism and gold atomic structure within the protein. Finally, the biomolecular self-assembly process of the protein-stabilized gold clusters was elucidated by time-dependent X-ray absorption spectroscopy measurements and density functional theory calculations.
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Affiliation(s)
- D M Chevrier
- Department of Chemistry , Dalhousie University , 6274 Coburg Road , Halifax , NS B3H4J3 , Canada .
| | - V D Thanthirige
- Department of Chemistry , Western Michigan University , Kalamazoo , MI49008 , USA
| | - Z Luo
- Department of Chemical and Biomolecular Engineering , National University of Singapore , 119260 , Singapore
| | - S Driscoll
- Department of Chemistry , Dalhousie University , 6274 Coburg Road , Halifax , NS B3H4J3 , Canada .
| | - P Cho
- Department of Chemistry , Dalhousie University , 6274 Coburg Road , Halifax , NS B3H4J3 , Canada .
| | - M A MacDonald
- Department of Chemistry , Dalhousie University , 6274 Coburg Road , Halifax , NS B3H4J3 , Canada .
| | - Q Yao
- Department of Chemical and Biomolecular Engineering , National University of Singapore , 119260 , Singapore
| | - R Guda
- Department of Chemistry , Western Michigan University , Kalamazoo , MI49008 , USA
| | - J Xie
- Department of Chemical and Biomolecular Engineering , National University of Singapore , 119260 , Singapore
| | - E R Johnson
- Department of Chemistry , Dalhousie University , 6274 Coburg Road , Halifax , NS B3H4J3 , Canada .
| | - A Chatt
- Department of Chemistry , Dalhousie University , 6274 Coburg Road , Halifax , NS B3H4J3 , Canada .
| | - N Zheng
- State Key Laboratory for Physical Chemistry of Solid Surfaces , Collaborative Innovation Center of Chemistry for Energy Materials , Engineering Research Center for Nano-Preparation Technology of Fujian Province , National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , China
| | - P Zhang
- Department of Chemistry , Dalhousie University , 6274 Coburg Road , Halifax , NS B3H4J3 , Canada .
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45
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Perotto CU, Sodipo CL, Jones GJ, Tidey JP, Blake AJ, Lewis W, Davies ES, McMaster J, Schröder M. Heterobimetallic [NiFe] Complexes Containing Mixed CO/CN - Ligands: Analogs of the Active Site of the [NiFe] Hydrogenases. Inorg Chem 2018; 57:2558-2569. [PMID: 29465237 DOI: 10.1021/acs.inorgchem.7b02905] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of synthetic analogs of the active sites of [NiFe] hydrogenases remains challenging, and, in spite of the number of complexes featuring a [NiFe] center, those featuring CO and CN- ligands at the Fe center are under-represented. We report herein the synthesis of three bimetallic [NiFe] complexes [Ni( N2 S2)Fe(CO)2(CN)2], [Ni( S4)Fe(CO)2(CN)2], and [Ni( N2 S3)Fe(CO)2(CN)2] that each contain a Ni center that bridges through two thiolato S donors to a {Fe(CO)2(CN)2} unit. X-ray crystallographic studies on [Ni( N2 S3)Fe(CO)2(CN)2], supported by DFT calculations, are consistent with a solid-state structure containing distinct molecules in the singlet ( S = 0) and triplet ( S = 1) states. Each cluster exhibits irreversible reduction processes between -1.45 and -1.67 V vs Fc+/Fc and [Ni( N2 S3)Fe(CO)2(CN)2] possesses a reversible oxidation process at 0.17 V vs Fc+/Fc. Spectroelectrochemical infrared (IR) and electron paramagnetic resonance (EPR) studies, supported by density functional theory (DFT) calculations, are consistent with a NiIIIFeII formulation for [Ni( N2 S3)Fe(CO)2(CN)2]+. The singly occupied molecular orbital (SOMO) in [Ni( N2 S3)Fe(CO)2(CN)2]+ is based on Ni 3dz2 and 3p S with the S contributions deriving principally from the apical S-donor. The nature of the SOMO corresponds to that proposed for the Ni-C state of the [NiFe] hydrogenases for which a NiIIIFeII formulation has also been proposed. A comparison of the experimental structures, and the electrochemical and spectroscopic properties of [Ni( N2 S3)Fe(CO)2(CN)2] and its [Ni( N2 S3)] precursor, together with calculations on the oxidized [Ni( N2 S3)Fe(CO)2(CN)2]+ and [Ni( N2 S3)]+ forms suggests that the binding of the {Fe(CO)(CN)2} unit to the {Ni(CysS)4} center at the active site of the [NiFe] hydrogenases suppresses thiolate-based oxidative chemistry involving the bridging thiolate S donors. This is in addition to the role of the Fe center in modulating the redox potential and geometry and supporting a bridging hydride species between the Ni and Fe centers in the Ni-C state.
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Affiliation(s)
- Carlo U Perotto
- School of Chemistry , University of Nottingham , Nottingham , NG7 2RD , United Kingdom
| | - Charlene L Sodipo
- School of Chemistry , University of Nottingham , Nottingham , NG7 2RD , United Kingdom
| | - Graham J Jones
- School of Chemistry , University of Nottingham , Nottingham , NG7 2RD , United Kingdom
| | - Jeremiah P Tidey
- School of Chemistry , University of Nottingham , Nottingham , NG7 2RD , United Kingdom
| | - Alexander J Blake
- School of Chemistry , University of Nottingham , Nottingham , NG7 2RD , United Kingdom
| | - William Lewis
- School of Chemistry , University of Nottingham , Nottingham , NG7 2RD , United Kingdom
| | - E Stephen Davies
- School of Chemistry , University of Nottingham , Nottingham , NG7 2RD , United Kingdom
| | - Jonathan McMaster
- School of Chemistry , University of Nottingham , Nottingham , NG7 2RD , United Kingdom
| | - Martin Schröder
- The University of Manchester , Oxford Road , Manchester , M13 9PL , United Kingdom
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46
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Brewster TP, Nguyen TH, Li Z, Eckenhoff WT, Schley ND, DeYonker NJ. Synthesis and Characterization of Heterobimetallic Iridium-Aluminum and Rhodium-Aluminum Complexes. Inorg Chem 2018; 57:1148-1157. [PMID: 29356511 DOI: 10.1021/acs.inorgchem.7b02601] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We demonstrate the synthesis and characterization of a new class of late-transition-metal-aluminum heterobimetallic complexes via a novel synthetic pathway. Complexes of this type are exceedingly rare. Joint experimental and theoretical data sheds light on the electronic effect of ligands containing aluminum moieties on late-transition-metal complexes.
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Affiliation(s)
- Timothy P Brewster
- Department of Chemistry, The University of Memphis , 3744 Walker Avenue, Smith Chemistry Building, Memphis, Tennessee 38152, United States
| | - Tan H Nguyen
- Department of Chemistry, The University of Memphis , 3744 Walker Avenue, Smith Chemistry Building, Memphis, Tennessee 38152, United States
| | - Zhongjing Li
- Department of Chemistry, The University of Memphis , 3744 Walker Avenue, Smith Chemistry Building, Memphis, Tennessee 38152, United States
| | - William T Eckenhoff
- Department of Chemistry, Rhodes College , 2000 N. Parkway, Memphis, Tennessee 38112, United States
| | - Nathan D Schley
- Department of Chemistry, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Nathan J DeYonker
- Department of Chemistry, The University of Memphis , 3744 Walker Avenue, Smith Chemistry Building, Memphis, Tennessee 38152, United States
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47
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Free methylidyne? CCC-NHC tantalum bis(imido) reactivity: protonation, rearrangement to a mixed unsymmetrical CCC-N-heterocyclic carbene/N-heterocyclic dicarbene (CCC-NHC/NHDC) pincer tantalum bis(imido) complex. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.08.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Schweigert IV, Gunlycke D. Hydrolysis of Dimethyl Methylphosphonate by the Cyclic Tetramer of Zirconium Hydroxide. J Phys Chem A 2017; 121:7690-7696. [DOI: 10.1021/acs.jpca.7b06403] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Igor V. Schweigert
- U.S. Naval Research Laboratory, Code 6189, Washington, District
of Columbia 20375, United States
| | - Daniel Gunlycke
- U.S. Naval Research Laboratory, Code 6189, Washington, District
of Columbia 20375, United States
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49
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Cope JD, Denny JA, Lamb RW, McNamara LE, Hammer NI, Webster CE, Hollis TK. Synthesis, characterization, photophysics, and a ligand rearrangement of CCC-NHC pincer nickel complexes: Colors, polymorphs, emission, and Raman spectra. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.05.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Liang G, DeYonker NJ, Zhao X, Webster CE. Prediction of the reduction potential in transition‐metal containing complexes: How expensive? For what accuracy? J Comput Chem 2017; 38:2430-2438. [DOI: 10.1002/jcc.24894] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/26/2017] [Accepted: 07/06/2017] [Indexed: 12/20/2022]
Affiliation(s)
- Guangchao Liang
- Department of ChemistryMississippi State University, Mississippi StateMississippi39762‐9573
| | | | - Xuan Zhao
- Department of ChemistryThe University of MemphisMemphis Tennessee38152
| | - Charles Edwin Webster
- Department of ChemistryMississippi State University, Mississippi StateMississippi39762‐9573
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