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Ahmed Malik WM, Afaq S, Mahmood A, Niu L, Yousaf ur Rehman M, Ibrahim M, Mohyuddin A, Qureshi AM, Ashiq MN, Chughtai AH. A facile synthesis of CeO2 from the GO@Ce-MOF precursor and its efficient performance in the oxygen evolution reaction. Front Chem 2022; 10:996560. [PMID: 36277339 PMCID: PMC9585184 DOI: 10.3389/fchem.2022.996560] [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: 07/17/2022] [Accepted: 09/20/2022] [Indexed: 11/25/2022] Open
Abstract
Electrochemical water splitting has enticed fascinating consideration as a key conduit for the advancement of renewable energy systems. Fabricating adequate electrocatalysts for water splitting is fervently preferred to curtail their overpotentials and hasten practical utilizations. In this work, a series of Ce-MOF, GO@Ce-MOF, calcinated Ce-MOF, and calcinated GO@Ce-MOF were synthesized and used as high-proficient electrocatalysts for the oxygen evolution reaction. The physicochemical characteristics of the prepared samples were measured by diverse analytical techniques including SEM, HRTEM, FTIR, BET, XPS, XRD, and EDX. All materials underwent cyclic voltammetry tests and were evaluated by electrochemical impedance spectroscopy and oxygen evolution reaction. Ce-MOF, GO@Ce-MOF, calcinated Ce-MOF, and calcinated GO@Ce-MOF have remarkable properties such as enhanced specific surface area, improved catalytic performance, and outstanding permanency in the alkaline solution (KOH). These factors upsurge ECSA and intensify the OER performance of the prepared materials. More exposed surface active-sites present in calcinated GO@Ce-MOF could be the logic for superior electrocatalytic activity. Chronoamperometry of the catalyst for 15°h divulges long-term stability of Ce-MOF during OER. Impedance measurements indicate higher conductivity of synthesized catalysts, facilitating the charge transfer reaction during electrochemical water splitting. This study will open up a new itinerary for conspiring highly ordered MOF-based surface active resources for distinct electrochemical energy applications.
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Affiliation(s)
- Wasif Mahmood Ahmed Malik
- Institute of Chemical Sciences, Bahauddin Zakariya University, Multan, Pakistan
- Department of Chemistry, Emerson University, Multan, Pakistan
| | - Sheereen Afaq
- Institute of Chemical Sciences, Bahauddin Zakariya University, Multan, Pakistan
| | - Azhar Mahmood
- Guangzhou Key Laboratory of Sensing Materials & Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, China
| | - Li Niu
- Guangzhou Key Laboratory of Sensing Materials & Devices, Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, China
| | | | - Muhammad Ibrahim
- Department of Biochemistry, Bahauddin Zakariya University, Multan, Pakistan
| | - Abrar Mohyuddin
- Department of Chemistry, Emerson University, Multan, Pakistan
| | - Ashfaq Mahmood Qureshi
- Department of Chemistry, Government Sadiq College Women University, Bahawalpur, Pakistan
| | - Muhammad Naeem Ashiq
- Institute of Chemical Sciences, Bahauddin Zakariya University, Multan, Pakistan
- *Correspondence: Muhammad Naeem Ashiq, ; Adeel Hussain Chughtai,
| | - Adeel Hussain Chughtai
- Institute of Chemical Sciences, Bahauddin Zakariya University, Multan, Pakistan
- *Correspondence: Muhammad Naeem Ashiq, ; Adeel Hussain Chughtai,
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2
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Holubowitch NE, Nguyen G. Dimerization of [Fe III(bpy) 3] 3+ in Aqueous Solutions: Elucidating a Mechanism Based on Historical Proposals, Electrochemical Data, and Computational Free Energy Analysis. Inorg Chem 2022; 61:9541-9556. [PMID: 35699660 DOI: 10.1021/acs.inorgchem.2c00640] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Iron(II) tris-bipyridine, [FeII(bpy)3]2+, is a historically significant organometallic coordination complex with attractive redox and photophysical properties. With respect to energy storage, it is a low-cost, high-redox potential complex and thus attractive for use as a catholyte in aqueous redox flow batteries. Despite these favorable characteristics, its oxidized Fe(III) form undergoes dimerization to form μ-O-[FeIII(bpy)2(H2O)]24+, leading to a dramatic ∼0.7 V decrease during battery discharge. To date, the energetics and complete mechanism of this slow, sequential electrochemical-chemical (EC) process, which includes electron transfer, nucleophilic attack, ligand cleavage, μ-oxo bond formation, and spin state transition, have not been elucidated. Using cyclic voltammetry, redox flow battery data, and density functional theory calculations guided by previously proposed mechanisms, we modeled more than 100 complexes and performed more than 50 geometry scans to resolve the key steps dictating these complex chemical processes. Quantitative free energy surfaces are developed to model the mechanism of dimerization accounting for the spins and identities of any possible Fe(II), Fe(III), or Fe(IV) intermediates. Electrochemical reduction of the dimer regenerates [FeII(bpy)3]2+ in an overall reversible process. Computational electrochemistry interrogates the influence of spin state, coordination environment, and molecular conformation at the electrode-electrolyte interface through a proposed stepwise dimer reduction process. Experimentally, we show that the considerable overpotential associated with this event can be catalytically mitigated with disparate materials, including platinum, copper hexacyanoferrate, and activated carbon. The findings are of fundamental and applied significance and could elevate [FeII(bpy)3]2+ and its derivatives to play a vital role in the burgeoning renewable energy economy.
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Affiliation(s)
- Nicolas E Holubowitch
- Texas A&M University-Corpus Christi, 6300 Ocean Drive, Corpus Christi, Texas 78412, United States
| | - Giang Nguyen
- Texas A&M University-Corpus Christi, 6300 Ocean Drive, Corpus Christi, Texas 78412, United States
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3
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Abstract
The number of rare earth (RE) starting materials used in synthesis is staggering, ranging from simple binary metal-halide salts to borohydrides and "designer reagents" such as alkyl and organoaluminate complexes. This review collates the most important starting materials used in RE synthetic chemistry, including essential information on their preparations and uses in modern synthetic methodologies. The review is divided by starting material category and supporting ligands (i.e., metals as synthetic precursors, halides, borohydrides, nitrogen donors, oxygen donors, triflates, and organometallic reagents), and in each section relevant synthetic methodologies and applications are discussed.
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Affiliation(s)
- Fabrizio Ortu
- School of Chemistry, University of Leicester, LE1 7RH Leicester, U.K.
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4
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Electrochemical Ce(III)/Ce(IV) interconversion, electrodeposition, and catalytic CO ↔ CO2 interconversion over terpyridine-modified indium tin oxide electrodes. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.11.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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5
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Su J, Cheisson T, McSkimming A, Goodwin CAP, DiMucci IM, Albrecht-Schönzart T, Scott BL, Batista ER, Gaunt AJ, Kozimor SA, Yang P, Schelter EJ. Complexation and redox chemistry of neptunium, plutonium and americium with a hydroxylaminato ligand. Chem Sci 2021; 12:13343-13359. [PMID: 34777753 PMCID: PMC8528073 DOI: 10.1039/d1sc03905a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 09/03/2021] [Indexed: 11/25/2022] Open
Abstract
There is significant interest in ligands that can stabilize actinide ions in oxidation states that can be exploited to chemically differentiate 5f and 4f elements. Applications range from developing large-scale actinide separation strategies for nuclear industry processing to carrying out analytical studies that support environmental monitoring and remediation efforts. Here, we report syntheses and characterization of Np(iv), Pu(iv) and Am(iii) complexes with N-tert-butyl-N-(pyridin-2-yl)hydroxylaminato, [2-(tBuNO)py]−(interchangeable hereafter with [(tBuNO)py]−), a ligand which was previously found to impart remarkable stability to cerium in the +4 oxidation state. An[(tBuNO)py]4 (An = Pu, 1; Np, 2) have been synthesized, characterized by X-ray diffraction, X-ray absorption, 1H NMR and UV-vis-NIR spectroscopies, and cyclic voltammetry, along with computational modeling and analysis. In the case of Pu, oxidation of Pu(iii) to Pu(iv) was observed upon complexation with the [(tBuNO)py]− ligand. The Pu complex 1 and Np complex 2 were also isolated directly from Pu(iv) and Np(iv) precursors. Electrochemical measurements indicate that a Pu(iii) species can be accessed upon one-electron reduction of 1 with a large negative reduction potential (E1/2 = −2.26 V vs. Fc+/0). Applying oxidation potentials to 1 and 2 resulted in ligand-centered electron transfer reactions, which is different from the previously reported redox chemistry of UIV[(tBuNO)py]4 that revealed a stable U(v) product. Treatment of an anhydrous Am(iii) precursor with the [(tBuNO)py]− ligand did not result in oxidation to Am(iv). Instead, the dimeric complex [AmIII(μ2-(tBuNO)py)((tBuNO)py)2]2 (3) was isolated. Complex 3 is a rare example of a structurally characterized non-aqueous Am-containing molecular complex prepared using inert atmosphere techniques. Predicted redox potentials from density functional theory calculations show a trivalent accessibility trend of U(iii) < Np(iii) < Pu(iii) and that the higher oxidation states of actinides (i.e., +5 for Np and Pu and +4 for Am) are not stabilized by [2-(tBuNO)py]−, in good agreement with experimental observations. The coordination modes and electronic properties of a strongly coordinating hydroxylaminato ligand with Np, Pu and Am were investigated.Complexes were characterized by a range of experimental and computational techniques.![]()
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Affiliation(s)
- Jing Su
- Theoretical Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S 34th St. Philadelphia Pennsylvania 19104 USA
| | - Alex McSkimming
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S 34th St. Philadelphia Pennsylvania 19104 USA
| | - Conrad A P Goodwin
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Ida M DiMucci
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Thomas Albrecht-Schönzart
- Department of Chemistry and Biochemistry, Florida State University 95 Chieftan Way Tallahassee Florida 32306 USA
| | - Brian L Scott
- Materials and Physics Applications Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Enrique R Batista
- Theoretical Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Andrew J Gaunt
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Stosh A Kozimor
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Eric J Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S 34th St. Philadelphia Pennsylvania 19104 USA
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6
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Park SJ, Joo MH, Yang JH, Hong SM, Rhee CK, Kang JG, Sohn Y. Electrochemical Ce(III)/Ce(IV) Redox Behavior and Ce Oxide Nanostructure Recovery over Thio-Terpyridine-Functionalized Au/Carbon Paper Electrodes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:27594-27611. [PMID: 34080410 DOI: 10.1021/acsami.1c05105] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Understanding the electrochemical behaviors of Ce(III)/Ce(IV) ions is essential for better treatment, separation, and recycling of lanthanide (Ln) and actinide (An) elements. Herein, electrochemical redox behavior and interconversion of Ce(III)/Ce(IV) ions and their recoveries were demonstrated over newly developed thio-terpyridine-functionalized Au-modified carbon paper electrodes in acidic and neutral electrolytes. Cyclic voltammetry and amperometry were performed for the electrodes with and without thio-terpyridine functionalization. Ce oxide nanostructure recovery was successfully conducted by amperometry, and the electrodeposited nanostructured Ce materials were fully characterized by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction crystallography, and X-ray photoelectron spectroscopy. Geometry optimization and the electronic energy state calculations were conducted by density functional theory at the B3LYP/GENECP level for the complexes of Ce(III) and Ce(IV) ions with the thio-terpyridine in an aqueous state. The present unique results provide valuable information on understanding redox behaviors of Ln and An ions for their recycling and treatment processes.
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Affiliation(s)
- So Jeong Park
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Min Hee Joo
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Ju Hyun Yang
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Sung-Min Hong
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Choong Kyun Rhee
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Jun-Gill Kang
- IDK, #306 IT Venture Town, Techno 9-Ro, Yuseong, Daejeon 34839, Republic of Korea
| | - Youngku Sohn
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
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7
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Hirneise L, Langmann J, Zitzer G, Ude L, Maichle-Mössmer C, Scherer W, Speiser B, Anwander R. Tuning Organocerium Electrochemical Potentials by Extending Tris(cyclopentadienyl) Scaffolds with Terminal Halogenido, Siloxy, and Alkoxy Ligands. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00276] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Lars Hirneise
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Jan Langmann
- Institut für Physik, Universität Augsburg, Universitätsstraße 1, 86159 Augsburg, Germany
| | - Georg Zitzer
- Institut für Organische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Lukas Ude
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Cäcilia Maichle-Mössmer
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Wolfgang Scherer
- Institut für Physik, Universität Augsburg, Universitätsstraße 1, 86159 Augsburg, Germany
| | - Bernd Speiser
- Institut für Organische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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8
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Beerhues J, Neubrand M, Sobottka S, Neuman NI, Aberhan H, Chandra S, Sarkar B. Directed Design of a Au I Complex with a Reduced Mesoionic Carbene Radical Ligand: Insights from 1,2,3-Triazolylidene Selenium Adducts and Extensive Electrochemical Investigations. Chemistry 2021; 27:6557-6568. [PMID: 33502818 PMCID: PMC8252451 DOI: 10.1002/chem.202100105] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Indexed: 11/07/2022]
Abstract
Carbene-based radicals are important for both fundamental and applied chemical research. Herein, extensive electrochemical investigations of nine different 1,2,3-triazolylidene selenium adducts are reported. It is found that the half-wave potentials of the first reduction of the selones correlate with their calculated LUMO levels and the LUMO levels of the corresponding triazolylidene-based mesoionic carbenes (MICs). Furthermore, unexpected quasi-reversibility of the reduction of two triazoline selones, exhibiting comparable reduction potentials, was discovered. Through UV/Vis/NIR and EPR spectroelectrochemical investigations supported by DFT calculations, the radical anion was unambiguously assigned to be triazoline centered. This electrochemical behavior was transferred to a triazolylidene-type MIC-gold phenyl complex resulting in a MIC-radical coordinated AuI species. Apart from UV-Vis-NIR and EPR spectroelectrochemical investigations of the reduction, the reduced gold-coordinated MIC radical complex was also formed in situ in the bulk through chemical reduction. This is the first report of a monodentate triazolylidene-based MIC ligand that can be reduced to its anion radical in a metal complex. The results presented here provide design principles for stabilizing radicals based on MICs.
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Affiliation(s)
- Julia Beerhues
- Lehrstuhl für Anorganische KoordinationschemieInstitut für Anorganische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
- Institut für Chemie und BiochemieFreie Universität BerlinFabeckstraße 34–3614195BerlinGermany
| | - Maren Neubrand
- Lehrstuhl für Anorganische KoordinationschemieInstitut für Anorganische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Sebastian Sobottka
- Institut für Chemie und BiochemieFreie Universität BerlinFabeckstraße 34–3614195BerlinGermany
| | - Nicolás I. Neuman
- Lehrstuhl für Anorganische KoordinationschemieInstitut für Anorganische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Hannes Aberhan
- Institut für Chemie und BiochemieFreie Universität BerlinFabeckstraße 34–3614195BerlinGermany
| | - Shubhadeep Chandra
- Lehrstuhl für Anorganische KoordinationschemieInstitut für Anorganische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Biprajit Sarkar
- Lehrstuhl für Anorganische KoordinationschemieInstitut für Anorganische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
- Institut für Chemie und BiochemieFreie Universität BerlinFabeckstraße 34–3614195BerlinGermany
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9
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Panetti GB, Sergentu DC, Gau MR, Carroll PJ, Autschbach J, Walsh PJ, Schelter EJ. Isolation and characterization of a covalent Ce IV-Aryl complex with an anomalous 13C chemical shift. Nat Commun 2021; 12:1713. [PMID: 33731719 PMCID: PMC7969749 DOI: 10.1038/s41467-021-21766-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 02/02/2021] [Indexed: 12/13/2022] Open
Abstract
The synthesis of bona fide organometallic CeIV complexes is a formidable challenge given the typically oxidizing properties of the CeIV cation and reducing tendencies of carbanions. Herein, we report a pair of compounds comprising a CeIV - Caryl bond [Li(THF)4][CeIV(κ2-ortho-oxa)(MBP)2] (3-THF) and [Li(DME)3][CeIV(κ2-ortho-oxa)(MBP)2] (3-DME), ortho-oxa = dihydro-dimethyl-2-[4-(trifluoromethyl)phenyl]-oxazolide, MBP2- = 2,2'-methylenebis(6-tert-butyl-4-methylphenolate), which exhibit CeIV - Caryl bond lengths of 2.571(7) - 2.5806(19) Å and strongly-deshielded, CeIV - Cipso 13C{1H} NMR resonances at 255.6 ppm. Computational analyses reveal the Ce contribution to the CeIV - Caryl bond of 3-THF is ~12%, indicating appreciable metal-ligand covalency. Computations also reproduce the characteristic 13C{1H} resonance, and show a strong influence from spin-orbit coupling (SOC) effects on the chemical shift. The results demonstrate that SOC-driven deshielding is present for CeIV - Cipso 13C{1H} resonances and not just for diamagnetic actinide compounds.
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Affiliation(s)
- Grace B Panetti
- Roy and Diana Vagelos Laboratories Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA
| | | | - Michael R Gau
- Roy and Diana Vagelos Laboratories Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA
| | - Patrick J Carroll
- Roy and Diana Vagelos Laboratories Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA.
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA.
| | - Eric J Schelter
- Roy and Diana Vagelos Laboratories Department of Chemistry, University of Pennsylvania, Philadelphia, PA, USA.
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10
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Schmickler W, Nazmutdinov RR, Wang Q, Daoud WA. Electrochemistry of Ce(IV)/Ce(III) redox couples in mixed solutions for aqueous flow battery: Experimental and molecular modelling study. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137601] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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Yang Q, Qiao Y, McSkimming A, Moreau LM, Cheisson T, Booth CH, Lapsheva E, Carroll PJ, Schelter EJ. A hydrolytically stable Ce( iv) complex of glutarimide-dioxime. Inorg Chem Front 2021. [DOI: 10.1039/d0qi00969e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Glutarimide-dioxime, a proligand known for its strongly electron-donating properties that has been studied for applications in uranium-sequestration from seawater, is considered here for stabilization of the cerium(iv) cation.
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Affiliation(s)
- Qiaomu Yang
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Yusen Qiao
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Alex McSkimming
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Liane M. Moreau
- Chemical Sciences Division
- Lawerence Berkeley National Laboratory
- Berkeley
- USA
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Corwin H. Booth
- Chemical Sciences Division
- Lawerence Berkeley National Laboratory
- Berkeley
- USA
| | - Ekaterina Lapsheva
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
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12
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Qiao Y, Yin H, Moreau LM, Feng R, Higgins RF, Manor BC, Carroll PJ, Booth CH, Autschbach J, Schelter EJ. Cerium(iv) complexes with guanidinate ligands: intense colors and anomalous electronic structures. Chem Sci 2020; 12:3558-3567. [PMID: 34163629 PMCID: PMC8179493 DOI: 10.1039/d0sc05193d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
A series of cerium(iv) mixed-ligand guanidinate–amide complexes, {[(Me3Si)2NC(NiPr)2]xCeIV[N(SiMe3)2]3−x}+ (x = 0–3), was prepared by chemical oxidation of the corresponding cerium(iii) complexes, where x = 1 and 2 represent novel complexes. The Ce(iv) complexes exhibited a range of intense colors, including red, black, cyan, and green. Notably, increasing the number of the guanidinate ligands from zero to three resulted in significant redshift of the absorption bands from 503 nm (2.48 eV) to 785 nm (1.58 eV) in THF. X-ray absorption near edge structure (XANES) spectra indicated increasing f occupancy (nf) with more guanidinate ligands, and revealed the multiconfigurational ground states for all Ce(iv) complexes. Cyclic voltammetry experiments demonstrated less stabilization of the Ce(iv) oxidation state with more guanidinate ligands. Moreover, the Ce(iv) tris(guanidinate) complex exhibited temperature independent paramagnetism (TIP) arising from the small energy gap between the ground- and excited states with considerable magnetic moments. Computational analysis suggested that the origin of the low energy absorption bands was a charge transfer between guanidinate π orbitals that were close in energy to the unoccupied Ce 4f orbitals. However, the incorporation of sterically hindered guanidinate ligands inhibited optimal overlaps between Ce 5d and ligand N 2p orbitals. As a result, there was an overall decrease of ligand-to-metal donation and a less stabilized Ce(iv) oxidation state, while at the same time, more of the donated electron density ended up in the 4f shell. The results indicate that incorporating guanidinate ligands into Ce(iv) complexes gives rise to intense charge transfer bands and noteworthy electronic structures, providing insights into the stabilization of tetravalent lanthanide oxidation states. A series of cerium(iv) mixed-ligand guanidinate-amide complexes, {[(Me3Si)2NC(NiPr)2]xCeIV[N(SiMe3)2]3−x}+ (x = 0−3), was prepared by chemical oxidation and studied spectroscopically and computationally, revealing trends in 4f/5d orbital occupancies.![]()
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Affiliation(s)
- Yusen Qiao
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34 Street Philadelphia Pennsylvania 19104 USA .,Chemical Sciences Division, Lawrence Berkeley National Laboratory Berkeley California 94720 USA
| | - Haolin Yin
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34 Street Philadelphia Pennsylvania 19104 USA
| | - Liane M Moreau
- Chemical Sciences Division, Lawrence Berkeley National Laboratory Berkeley California 94720 USA
| | - Rulin Feng
- Department of Chemistry, University at Buffalo, State University of New York Buffalo New York 14260 USA
| | - Robert F Higgins
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34 Street Philadelphia Pennsylvania 19104 USA
| | - Brian C Manor
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34 Street Philadelphia Pennsylvania 19104 USA
| | - Patrick J Carroll
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34 Street Philadelphia Pennsylvania 19104 USA
| | - Corwin H Booth
- Chemical Sciences Division, Lawrence Berkeley National Laboratory Berkeley California 94720 USA
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York Buffalo New York 14260 USA
| | - Eric J Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 South 34 Street Philadelphia Pennsylvania 19104 USA
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Werner D, Bayer U, Schädle D, Anwander R. Emergence of a New [NNN] Pincer Ligand via Si-H Bond Activation and β-Hydride Abstraction at Tetravalent Cerium. Chemistry 2020; 26:12194-12205. [PMID: 32239686 PMCID: PMC7540680 DOI: 10.1002/chem.202000625] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/19/2020] [Indexed: 01/08/2023]
Abstract
The cerium(IV) pyrazolate complexes [Ce(Me2 pz)4 ]2 and [Ce(Me2 pz)4 (thf)] initiate β-hydride abstraction of the bis(dimethylsilyl)amido moiety, to afford a heteroleptic cerium(IV) species containing a dimethylpyrazolyl-substituted silylamido ligand, namely [Ce(Me2 pz)3 (bpsa)] (bpsa=bis((3,5-dimethylpyrazol-1-yl)dimethylsilyl)amido; Me2 pz =3,5-dimethylpyrazolato), along with some cerium(III) species. Remarkably, the nucleophilic attack of the pyrazolyl at the silicon atom and concomitant Si-H-bond cleavage is restricted to the tetravalent cerium oxidation state and appears to proceed via the formation of a transient cerium(IV) hydride, which engages in immediate redox chemistry. When [Ce(Me2 pz)4 ]2 is treated with [Li{N(SiMe3 )2 }], that is, in the absence of the SiH functionality, any redox chemistry did not occur. Instead, the ceric ate complex [LiCe2 (Me2 pz)9 ] and the stable mixed-ligand ceric species [Ce(Me2 pz)2 {N(SiMe3 )2 }2 ] were obtained.
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Affiliation(s)
- Daniel Werner
- Institut für Anorganische ChemieUniversity of Tübingen (EKUT)Auf der Morgenstelle 1872076TübingenGermany
| | - Uwe Bayer
- Institut für Anorganische ChemieUniversity of Tübingen (EKUT)Auf der Morgenstelle 1872076TübingenGermany
| | - Dorothea Schädle
- Institut für Anorganische ChemieUniversity of Tübingen (EKUT)Auf der Morgenstelle 1872076TübingenGermany
| | - Reiner Anwander
- Institut für Anorganische ChemieUniversity of Tübingen (EKUT)Auf der Morgenstelle 1872076TübingenGermany
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14
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Bayer U, Bock L, Maichle‐Mössmer C, Anwander R. A Facile Route toward Ceric Silylamide [Ce{N(SiHMe
2
)
2
}
4
]. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201901023] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Uwe Bayer
- Institut für Anorganische Chemie University of Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Lorenz Bock
- Institut für Anorganische Chemie University of Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Cäcilia Maichle‐Mössmer
- Institut für Anorganische Chemie University of Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie University of Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
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15
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Assefa MK, Sergentu DC, Seaman LA, Wu G, Autschbach J, Hayton TW. Synthesis, Characterization, and Electrochemistry of the Homoleptic f Element Ketimide Complexes [Li]2[M(N═CtBuPh)6] (M = Ce, Th). Inorg Chem 2019; 58:12654-12661. [DOI: 10.1021/acs.inorgchem.9b01428] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Mikiyas K. Assefa
- Department of Chemistry and Biochemistry, University of California Santa Barbara, 93106 Santa Barbara, California, United States
- Department of Chemistry, University at Buffalo, State University of New York, 14260 Buffalo, New York, United States
| | - Dumitru-Claudiu Sergentu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, 93106 Santa Barbara, California, United States
- Department of Chemistry, University at Buffalo, State University of New York, 14260 Buffalo, New York, United States
| | - Lani A. Seaman
- Department of Chemistry and Biochemistry, University of California Santa Barbara, 93106 Santa Barbara, California, United States
- Department of Chemistry, University at Buffalo, State University of New York, 14260 Buffalo, New York, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, 93106 Santa Barbara, California, United States
- Department of Chemistry, University at Buffalo, State University of New York, 14260 Buffalo, New York, United States
| | - Jochen Autschbach
- Department of Chemistry and Biochemistry, University of California Santa Barbara, 93106 Santa Barbara, California, United States
- Department of Chemistry, University at Buffalo, State University of New York, 14260 Buffalo, New York, United States
| | - Trevor W. Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, 93106 Santa Barbara, California, United States
- Department of Chemistry, University at Buffalo, State University of New York, 14260 Buffalo, New York, United States
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16
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Kiernicki JJ, Shanahan JP, Zeller M, Szymczak NK. Tuning ligand field strength with pendent Lewis acids: access to high spin iron hydrides. Chem Sci 2019; 10:5539-5545. [PMID: 31293738 PMCID: PMC6553361 DOI: 10.1039/c9sc00561g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 04/25/2019] [Indexed: 11/21/2022] Open
Abstract
Geometrically flexible 9-borabicyclo[3.3.1]nonyl units within the secondary coordination sphere enable isolation of high-spin Fe(ii)-dihydrides stabilized by boron-hydride interactions and a rare example of an isolable S = 3/2 reduction product. The borane-capped Fe(ii)-dihydride: (1) rapidly deprotonates E-H (E = N, O, P, S) bonds to afford borane-stabilized Fe adducts and (2) releases H2 upon exposure to π-acids. The Lewis acids provide an avenue for redox-leveling in analogy to the near constant operating potential for N2 reduction in nitrogenase.
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Affiliation(s)
- John J Kiernicki
- University of Michigan , 930 N. University , Ann Arbor , MI 48109 , USA .
| | - James P Shanahan
- University of Michigan , 930 N. University , Ann Arbor , MI 48109 , USA .
| | - Matthias Zeller
- H. C. Brown Laboratory , Purdue University , 560 Oval Dr , West Lafayette , IN 47907 , USA
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17
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Rice NT, Su J, Gompa TP, Russo DR, Telser J, Palatinus L, Bacsa J, Yang P, Batista ER, La Pierre HS. Homoleptic Imidophosphorane Stabilization of Tetravalent Cerium. Inorg Chem 2019; 58:5289-5304. [DOI: 10.1021/acs.inorgchem.9b00368] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
| | - Jing Su
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | | | | | - Joshua Telser
- Department of Biological, Physical and Health Sciences, Roosevelt University, Chicago, Illinois 60605, United States
| | - Lukas Palatinus
- Institute of Physics, Czech Academy of Sciences, Na Slovance 2, 182 21 Prague 6, Czechia
| | | | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Enrique R. Batista
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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18
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Qiao Y, Cheisson T, Manor BC, Carroll PJ, Schelter EJ. A strategy to improve the performance of cerium(iii) photocatalysts. Chem Commun (Camb) 2019; 55:4067-4070. [DOI: 10.1039/c9cc00282k] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A structural modification strategy to improve the photocatalytic performance of molecular cerium(iii) luminophores was demonstrated.
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Affiliation(s)
- Yusen Qiao
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Brian C. Manor
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
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19
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Friedrich J, Maichle‐Mössmer C, Schrenk C, Schnepf A, Anwander R. Ceric Ammonium Nitrate and Ceric Ammonium Chloride as Precursors for Ceric Siloxides: Ammonia and Ammonium Inclusion. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801150] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Jochen Friedrich
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Germany
| | - Cäcilia Maichle‐Mössmer
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Germany
| | - Claudio Schrenk
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Germany
| | - Andreas Schnepf
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Germany
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20
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Computational electrochemistry of a novel ferrocene derivative. J Mol Graph Model 2018; 85:84-90. [PMID: 30125780 DOI: 10.1016/j.jmgm.2018.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 08/02/2018] [Accepted: 08/03/2018] [Indexed: 11/23/2022]
Abstract
In this study, the structural and redox properties of a novel ferrocene derivative in dichlomethane solvent were investigated. For this aim, various exchange-correlation functionals and basis sets in gas phase with different continuum solvation models and cavities in liquid phase were applied. The results indicated that UM06/6-31++G(d,p)/SDD level of theory successfully calculated bond lengths and angles with MADs = 0.02 Å and 0.78 deg., respectively. Also, its combination with CPCM-Pauling-UHF/6-31+G(d)/SDD level of theory in liquid phase effectively computed the redox potential with 0.06 V deviation from the experimental value. Moreover, transferability of the proposed method was studied through ferrocene molecule and its new synthesized derivative.
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21
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Hendrickx K, Joos JJ, De Vos A, Poelman D, Smet PF, Van Speybroeck V, Van Der Voort P, Lejaeghere K. Exploring Lanthanide Doping in UiO-66: A Combined Experimental and Computational Study of the Electronic Structure. Inorg Chem 2018; 57:5463-5474. [DOI: 10.1021/acs.inorgchem.8b00425] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kevin Hendrickx
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 (S3), 9000 Gent, Belgium
- Center for Molecular Modeling (CMM), Ghent University, Technologiepark 903, 9052 Zwijnaarde, Belgium
| | - Jonas J. Joos
- LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281 (S1), 9000 Gent, Belgium
- Center for Nano- and Biophotonics (NB Photonics), Ghent University, 9000 Gent, Belgium
| | - Arthur De Vos
- Center for Molecular Modeling (CMM), Ghent University, Technologiepark 903, 9052 Zwijnaarde, Belgium
| | - Dirk Poelman
- LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281 (S1), 9000 Gent, Belgium
- Center for Nano- and Biophotonics (NB Photonics), Ghent University, 9000 Gent, Belgium
| | - Philippe F. Smet
- LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281 (S1), 9000 Gent, Belgium
- Center for Nano- and Biophotonics (NB Photonics), Ghent University, 9000 Gent, Belgium
| | - Veronique Van Speybroeck
- Center for Molecular Modeling (CMM), Ghent University, Technologiepark 903, 9052 Zwijnaarde, Belgium
| | - Pascal Van Der Voort
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 (S3), 9000 Gent, Belgium
| | - Kurt Lejaeghere
- Center for Molecular Modeling (CMM), Ghent University, Technologiepark 903, 9052 Zwijnaarde, Belgium
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22
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McSkimming A, Su J, Cheisson T, Gau MR, Carroll PJ, Batista ER, Yang P, Schelter EJ. Coordination Chemistry of a Strongly-Donating Hydroxylamine with Early Actinides: An Investigation of Redox Properties and Electronic Structure. Inorg Chem 2018; 57:4387-4394. [DOI: 10.1021/acs.inorgchem.7b03238] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Alex McSkimming
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Jing Su
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Michael R. Gau
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Enrique R. Batista
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S 34th Street, Philadelphia, Pennsylvania 19104, United States
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23
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Rojas-Poblete M, Carreño A, Gacitúa M, Páez-Hernández D, Rabanal-León WA, Arratia-Pérez R. Electrochemical behaviors and relativistic DFT calculations to understand the terminal ligand influence on the [Re6(μ3-Q)8X6]4− clusters. NEW J CHEM 2018. [DOI: 10.1039/c7nj05114j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Born–Haber thermodynamic cycle was used to determine the redox potential in a series of rhenium(iii) clusters theoretical analysis at DFT level was considered to estimate the free energy of the reversible process ReIII6/ReIII5ReIV.
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Affiliation(s)
- Macarena Rojas-Poblete
- Center of Applied Nanosciences (CANS)
- Universidad Andrés Bello
- Santiago
- Chile
- Universidad Tecnológica de Chile INACAP
| | - Alexander Carreño
- Center of Applied Nanosciences (CANS)
- Universidad Andrés Bello
- Santiago
- Chile
- Núcleo Milenio de Ingeniería Molecular para Catálisis y Biosensores (MECB)
| | | | - Dayán Páez-Hernández
- Center of Applied Nanosciences (CANS)
- Universidad Andrés Bello
- Santiago
- Chile
- Núcleo Milenio de Ingeniería Molecular para Catálisis y Biosensores (MECB)
| | - Walter A. Rabanal-León
- Departamento de Ciencias Químicas
- Facultad Ciencias Exactas
- Universidad Andrés Bello
- Santiago
- Chile
| | - Ramiro Arratia-Pérez
- Center of Applied Nanosciences (CANS)
- Universidad Andrés Bello
- Santiago
- Chile
- Núcleo Milenio de Ingeniería Molecular para Catálisis y Biosensores (MECB)
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24
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Friedrich J, Qiao Y, Maichle-Mössmer C, Schelter EJ, Anwander R. Redox-enhanced hemilability of a tris(tert-butoxy)siloxy ligand at cerium. Dalton Trans 2018; 47:10113-10123. [DOI: 10.1039/c8dt01878b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Combined structural/electrochemical/computational studies of ceric Ce[OSi(OtBu)3]4 and cerous [Ce{OSi(OtBu)3}4][K(2.2.2-crypt)] suggest a redox-modulated coordination switch of a tris(tert-butoxy)siloxy ligand.
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Affiliation(s)
- Jochen Friedrich
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| | - Yusen Qiao
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | | | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Reiner Anwander
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
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25
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Lionetti D, Day VW, Blakemore JD. Noncovalent immobilization and surface characterization of lanthanide complexes on carbon electrodes. Dalton Trans 2017; 46:11779-11789. [DOI: 10.1039/c7dt02577g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Surface immobilization and spectroscopic characterization of redox-active molecular lanthanide complexes is demonstrated on carbon electrodes.
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Affiliation(s)
| | - Victor W. Day
- Department of Chemistry
- University of Kansas
- Lawrence
- USA
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