1
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Johnson CL, Storm DJ, Sajjad MA, Gyton MR, Duckett SB, Macgregor SA, Weller AS, Navarro M, Campos J. A Gold(I)-Acetylene Complex Synthesised using Single-Crystal Reactivity. Angew Chem Int Ed Engl 2024; 63:e202404264. [PMID: 38699962 DOI: 10.1002/anie.202404264] [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: 03/01/2024] [Revised: 05/01/2024] [Accepted: 05/03/2024] [Indexed: 05/05/2024]
Abstract
Using single-crystal to single-crystal solid/gas reactivity the gold(I) acetylene complex [Au(L1)(η2-HC≡CH)][BArF 4] is cleanly synthesized by addition of acetylene gas to single crystals of [Au(L1)(CO)][BArF 4] [L1=tris-2-(4,4'-di-tert-butylbiphenyl)phosphine, ArF=3,5-(CF3)2C6H3]. This simplest gold-alkyne complex has been characterized by single crystal X-ray diffraction, solution and solid-state NMR spectroscopy and periodic DFT. Bonding of HC≡CH with [Au(L1)]+ comprises both σ-donation and π-backdonation with additional dispersion interactions within the cavity-shaped phosphine.
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Affiliation(s)
- Chloe L Johnson
- Department of Chemistry, University of York, York, YO10 5DD, UK
| | - Daniel J Storm
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK
| | - M Arif Sajjad
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK
| | - Matthew R Gyton
- Department of Chemistry, University of York, York, YO10 5DD, UK
| | - Simon B Duckett
- Department of Chemistry, University of York, York, YO10 5DD, UK
| | - Stuart A Macgregor
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK
| | - Andrew S Weller
- Department of Chemistry, University of York, York, YO10 5DD, UK
| | - Miquel Navarro
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, 41092, Sevilla, Spain
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, 41092, Sevilla, Spain
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2
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Goodall JC, Sajjad MA, Thompson EA, Page SJ, Kerrigan AM, Jenkins HT, Lynam JM, Macgregor SA, Weller AS. In crystallo lattice adaptivity triggered by solid-gas reactions of cationic group 7 pincer complexes. Chem Commun (Camb) 2023; 59:10749-10752. [PMID: 37602809 PMCID: PMC10484290 DOI: 10.1039/d3cc03201a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 08/02/2023] [Indexed: 08/22/2023]
Abstract
The group 7 complexes [M(κ3-2,6-(R2PO)2C5H3N)(CO)2L][BArF4] [M = Mn, R = iPr, L = THF; M = Re, R = tBu, L = vacant site] undergo in crystallo solid-gas reactivity with CO to form the products of THF substitution or CO addition respectively. There is a large, local, adaptive change of [BArF4] anions for M = Mn, whereas for M = Re the changes are smaller and also remote to the site of reactivity.
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Affiliation(s)
- Joe C Goodall
- Department of Chemistry, University of York, York, YO10 5DD, UK
| | - M Arif Sajjad
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | | | - Samuel J Page
- Department of Chemistry, University of Durham, Durham, DH1 3LE, UK
| | - Adam M Kerrigan
- The York-JEOL Nanocentre, University of York, Heslington, York, YO10 5BR, UK
| | - Huw T Jenkins
- Department of Chemistry, University of York, York, YO10 5DD, UK
| | - Jason M Lynam
- Department of Chemistry, University of York, York, YO10 5DD, UK
| | - Stuart A Macgregor
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Andrew S Weller
- Department of Chemistry, University of York, York, YO10 5DD, UK
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3
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Eusamio J, Medina YM, Córdoba JC, Vidal-Ferran A, Sainz D, Gutiérrez A, Font-Bardia M, Grabulosa A. Rhodium and ruthenium complexes of methylene-bridged, P-stereogenic, unsymmetrical diphosphanes. Dalton Trans 2023; 52:2424-2439. [PMID: 36723212 DOI: 10.1039/d2dt04026c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Enantiopure P-stereogenic methylphosphane-boranes (SP)-P(BH3)PhArMe (ArMe; Ar = 1-naphthyl (NpMe), and 2-biphenylyl (BiphMe)) have been used to prepare diphosphanes of the type ArPhPCH2PR2 (R = Ph, iPr or tBu; ArR). The ligands have been reacted with [Rh(COD)2]BF4 to furnish the corresponding six monochelated [Rh(COD)(ArR)]BF4 organometallic compounds (RhArR) or, depending on the reaction conditions, the bis(chelated) coordination compound [Rh(BiphiPr)2]BF4 as a mixture of cis and trans isomers. The crystal structure of cis-[Rh(BiphiPr)2]BF4 was obtained. The coordination of the BiphR with [RuCl(μ-Cl)(η6-p-cymene)2]2 under different conditions produced cationic chelated complexes of the type [RuCl(η6-p-cymene)(κ2-BiphR)]PF6 (RuBiphR) and the neutral monocoordinated complex [RuCl2(η6-p-cymene)(κ1-BiphPh)] (RuBiphPh') with the uncoordinated P-stereogenic moiety. The Rh(I) complexes were used in the catalytic hydrogenation of functionalized olefins and the Ru(II) complexes were tested in the transfer hydrogenation of acetophenone. Both precursors displayed good activities with moderate enantioselectivities.
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Affiliation(s)
- Javier Eusamio
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, E-08028, Barcelona, Spain.,Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, E-08028, Barcelona, Spain.
| | - Yaiza M Medina
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, E-08028, Barcelona, Spain.,Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, E-08028, Barcelona, Spain.
| | - Javier C Córdoba
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, E-08028, Barcelona, Spain
| | - Anton Vidal-Ferran
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, E-08028, Barcelona, Spain.,Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, E-08028, Barcelona, Spain. .,Institució Catalana de Rercerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, E-08010, Barcelona, Spain
| | - Daniel Sainz
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, E-08028, Barcelona, Spain.,Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, E-08028, Barcelona, Spain.
| | - Albert Gutiérrez
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, E-08028, Barcelona, Spain.,Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, E-08028, Barcelona, Spain.
| | - Mercè Font-Bardia
- Unitat de Difracció de Raigs X, Centres Científics i Tecnològics de la Universitat de Barcelona (CCiTUB), Solé i Sabarís 1-3, E-08028, Barcelona, Spain
| | - Arnald Grabulosa
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, E-08028, Barcelona, Spain.,Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, E-08028, Barcelona, Spain.
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4
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Uchida K, Kishimoto N, Noro SI, Iguchi H, Takaishi S. Reversible hydrogen adsorption at room temperature using a molybdenum-dihydrogen complex in the solid state. Dalton Trans 2021; 50:12630-12634. [PMID: 34545876 DOI: 10.1039/d1dt01404h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Reversible H2 storage under mild conditions is one of the most important targets in the field of materials chemistry. Dihydrogen complexes are attractive materials for this target because they possess moderate adsorption enthalpy as well as adsorption without cleavage of the H-H bond. In spite of these advantages, H2 adsorption studies of dihydrogen complexes in the solid state are scarce. We herein present H2 adsorption properties of the 16-electron precursor complex ([Mo(PCy3)2(CO)3]) in the solid state synthesized by two procedures. One is the direct synthesis under an Ar atmosphere (1), and the other is removal of the N2-adduct under vacuum (2). 2 showed ideal Langmuir type reversible ad/desorption of H2 above room temperature, whereas 1 showed irreversible adsorption. The adsorption enthalpy of 2 was larger than that in THF solution. Using DFT calculation, this difference was explained by the absence of the agostic interaction in the solid state.
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Affiliation(s)
- Kaiji Uchida
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
| | - Naoki Kishimoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
| | - Shin-Ichiro Noro
- Faculty of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Hiroaki Iguchi
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
| | - Shinya Takaishi
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
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5
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Bukvic A, Burnage AL, Tizzard GJ, Martínez-Martínez AJ, McKay AI, Rees NH, Tegner BE, Krämer T, Fish H, Warren MR, Coles SJ, Macgregor SA, Weller AS. A Series of Crystallographically Characterized Linear and Branched σ-Alkane Complexes of Rhodium: From Propane to 3-Methylpentane. J Am Chem Soc 2021; 143:5106-5120. [PMID: 33769815 PMCID: PMC8154534 DOI: 10.1021/jacs.1c00738] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Indexed: 12/12/2022]
Abstract
Using solid-state molecular organometallic (SMOM) techniques, in particular solid/gas single-crystal to single-crystal reactivity, a series of σ-alkane complexes of the general formula [Rh(Cy2PCH2CH2PCy2)(ηn:ηm-alkane)][BArF4] have been prepared (alkane = propane, 2-methylbutane, hexane, 3-methylpentane; ArF = 3,5-(CF3)2C6H3). These new complexes have been characterized using single crystal X-ray diffraction, solid-state NMR spectroscopy and DFT computational techniques and present a variety of Rh(I)···H-C binding motifs at the metal coordination site: 1,2-η2:η2 (2-methylbutane), 1,3-η2:η2 (propane), 2,4-η2:η2 (hexane), and 1,4-η1:η2 (3-methylpentane). For the linear alkanes propane and hexane, some additional Rh(I)···H-C interactions with the geminal C-H bonds are also evident. The stability of these complexes with respect to alkane loss in the solid state varies with the identity of the alkane: from propane that decomposes rapidly at 295 K to 2-methylbutane that is stable and instead undergoes an acceptorless dehydrogenation to form a bound alkene complex. In each case the alkane sits in a binding pocket defined by the {Rh(Cy2PCH2CH2PCy2)}+ fragment and the surrounding array of [BArF4]- anions. For the propane complex, a small alkane binding energy, driven in part by a lack of stabilizing short contacts with the surrounding anions, correlates with the fleeting stability of this species. 2-Methylbutane forms more short contacts within the binding pocket, and as a result the complex is considerably more stable. However, the complex of the larger 3-methylpentane ligand shows lower stability. Empirically, there therefore appears to be an optimal fit between the size and shape of the alkane and overall stability. Such observations are related to guest/host interactions in solution supramolecular chemistry and the holistic role of 1°, 2°, and 3° environments in metalloenzymes.
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Affiliation(s)
- Alexander
J. Bukvic
- Department
of Chemistry, University of York, Heslington, York YO10
5DD, U.K.
- Department
of Chemistry, Chemistry Research Laboratories, University of Oxford, Oxford OX1 3TA, U.K.
| | - Arron L. Burnage
- Institute
of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS. U.K.
| | - Graham J. Tizzard
- UK
National Crystallography Service, University
of Southampton, Highfield, Southampton SO17 1BJ, U.K.
| | | | - Alasdair I. McKay
- Department
of Chemistry, Chemistry Research Laboratories, University of Oxford, Oxford OX1 3TA, U.K.
| | - Nicholas H. Rees
- Department
of Chemistry, Chemistry Research Laboratories, University of Oxford, Oxford OX1 3TA, U.K.
| | - Bengt E. Tegner
- Institute
of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS. U.K.
| | - Tobias Krämer
- Institute
of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS. U.K.
| | - Heather Fish
- Department
of Chemistry, University of York, Heslington, York YO10
5DD, U.K.
| | - Mark R. Warren
- Diamond
Light Source Ltd., Diamond House,
Harwell Science and Innovation Campus, Didcot OX11 0DE, U.K.
| | - Simon J. Coles
- UK
National Crystallography Service, University
of Southampton, Highfield, Southampton SO17 1BJ, U.K.
| | - Stuart A. Macgregor
- Institute
of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS. U.K.
| | - Andrew S. Weller
- Department
of Chemistry, University of York, Heslington, York YO10
5DD, U.K.
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6
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Furfari SK, Tegner BE, Burnage AL, Doyle LR, Bukvic AJ, Macgregor SA, Weller AS. Selectivity of Rh⋅⋅⋅H-C Binding in a σ-Alkane Complex Controlled by the Secondary Microenvironment in the Solid State. Chemistry 2021; 27:3177-3183. [PMID: 33112000 PMCID: PMC7898853 DOI: 10.1002/chem.202004585] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 10/27/2020] [Indexed: 12/13/2022]
Abstract
Single-crystal to single-crystal solid-state molecular organometallic (SMOM) techniques are used for the synthesis and structural characterization of the σ-alkane complex [Rh(tBu2 PCH2 CH2 CH2 PtBu2 )(η2 ,η2 -C7 H12 )][BArF 4 ] (ArF =3,5-(CF3 )2 C6 H3 ), in which the alkane (norbornane) binds through two exo-C-H⋅⋅⋅Rh interactions. In contrast, the bis-cyclohexyl phosphine analogue shows endo-alkane binding. A comparison of the two systems, supported by periodic DFT calculations, NCI plots and Hirshfeld surface analyses, traces this different regioselectivity to subtle changes in the local microenvironment surrounding the alkane ligand. A tertiary periodic structure supporting a secondary microenvironment that controls binding at the metal site has parallels with enzymes. The new σ-alkane complex is also a catalyst for solid/gas 1-butene isomerization, and catalyst resting states are identified for this.
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Affiliation(s)
| | - Bengt E. Tegner
- Institute of Chemical SciencesHeriot-Watt UniversityEdinburghEH14 4ASUK
| | - Arron L. Burnage
- Institute of Chemical SciencesHeriot-Watt UniversityEdinburghEH14 4ASUK
| | | | - Alexander J. Bukvic
- Department of ChemistryUniversity of YorkYorkYO10 5DDUK
- Department of ChemistryUniversity of OxfordMansfield RoadOxfordOX1 3TAUK
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7
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Bowden ME, Ginovska B, Jones MO, Karkamkar AJ, Ramirez-Cuesta AJ, Daemen LL, Schenter GK, Miller SA, Repo T, Chernichenko K, Leick N, Martinez MB, Autrey T. Heterolytic Scission of Hydrogen Within a Crystalline Frustrated Lewis Pair. Inorg Chem 2020; 59:15295-15301. [PMID: 33000622 DOI: 10.1021/acs.inorgchem.0c02290] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the heterolysis of molecular hydrogen under ambient conditions by the crystalline frustrated Lewis pair (FLP) 1-{2-[bis(pentafluorophenyl)boryl]phenyl}-2,2,6,6-tetramethylpiperidine (KCAT). The gas-solid reaction provides an approach to prepare the solvent-free, polycrystalline ion pair KCATH2 through a single crystal to single crystal transformation. The crystal lattice of KCATH2 increases in size relative to the parent KCAT by approximately 2%. Microscopy was used to follow the transformation of the highly colored red/orange KCAT to the colorless KCATH2 over a period of 2 h at 300 K under a flow of H2 gas. There is no evidence of crystal decrepitation during hydrogen uptake. Inelastic neutron scattering employed over a temperature range from 4-200 K did not provide evidence for the formation of polarized H2 in a precursor complex within the crystal at low temperatures and high pressures. However, at 300 K, the INS spectrum of KCAT transformed to the INS spectrum of KCATH2. Calculations suggest that the driving force is more favorable in the solid state compared to the solution or gas phase, but the addition of H2 into the KCAT crystal is unfavorable. Ab Initio methods were used to calculate the INS spectra of KCAT, KCATH2, and a possible precursor complex of H2 in the pocket between the B and N of crystalline KCAT. Ex-situ NMR showed that the transformation from KCAT to KCATH2 is quantitative and our results suggest that the hydrogen heterolysis process occurs via H2 diffusion into the FLP crystal with a rate-limiting movement of H2 from inactive positions to reactive sites.
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Affiliation(s)
- Mark E Bowden
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999 Richland, Washington 99352, United States
| | - Bojana Ginovska
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, P.O. Box 999 Richland, Washington 99352, United States
| | - Martin Owen Jones
- ISIS Neutron and Muon Spallation Facility, STFC, RAL, Didcot OX11 0QX, U.K.,St Andrews University, St Andrews, Fife KY16 9AJ, Scotland U.K
| | - Abhijeet J Karkamkar
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, P.O. Box 999 Richland, Washington 99352, United States
| | - Anibal J Ramirez-Cuesta
- Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Luke L Daemen
- Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Gregory K Schenter
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, P.O. Box 999 Richland, Washington 99352, United States
| | - Seth A Miller
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, P.O. Box 999 Richland, Washington 99352, United States
| | - Timo Repo
- Department of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland
| | | | - Noemi Leick
- National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80403, United States
| | - Madison B Martinez
- National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80403, United States
| | - Tom Autrey
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, P.O. Box 999 Richland, Washington 99352, United States
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8
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Choi JI, Moon D, Chun H. Static and Dynamic Adsorptions of Water Vapor by Cyclic [Zr
36
] Clusters: Implications for Atmospheric Water Capture Using Molecular Solids. B KOREAN CHEM SOC 2020. [DOI: 10.1002/bkcs.12100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jong In Choi
- Department of Chemical and Molecular Engineering Hanyang University Ansan 15588 Republic of Korea
| | - Dohyun Moon
- Beamline Division, Pohang Accelerator Laboratory Pohang 37673 Republic of Korea
| | - Hyungphil Chun
- Department of Chemical and Molecular Engineering Hanyang University Ansan 15588 Republic of Korea
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9
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Bukvic AJ, Crivoi DG, Garwood HG, McKay AI, Chen TTD, Martínez-Martínez AJ, Weller AS. Tolerant to air σ-alkane complexes by surface modification of single crystalline solid-state molecular organometallics using vapour-phase cationic polymerisation: SMOM@polymer. Chem Commun (Camb) 2020; 56:4328-4331. [PMID: 32191244 DOI: 10.1039/d0cc01140a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Vapour-phase surface-initiated cationic polymerisation of ethylvinylether occurs at single-crystals of the σ-alkane complex [Rh(Cy2PCH2CH2PCy2)(NBA)][BArF4]. This new surface interface makes these normally very air sensitive materials tolerant to air, while also allowing for onward single-crystal to single-crystal reactivity at metal sites within the lattice.
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Affiliation(s)
- Alexander J Bukvic
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
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10
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Martínez-Martínez AJ, Royle CG, Furfari SK, Suriye K, Weller AS. Solid-State Molecular Organometallic Catalysis in Gas/Solid Flow (Flow-SMOM) as Demonstrated by Efficient Room Temperature and Pressure 1-Butene Isomerization. ACS Catal 2020; 10:1984-1992. [PMID: 32296595 PMCID: PMC7147255 DOI: 10.1021/acscatal.9b03727] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 01/05/2020] [Indexed: 02/06/2023]
Abstract
![]()
The
use of solid–state molecular organometallic chemistry
(SMOM–chem) to promote the efficient double bond isomerization
of 1-butene to 2-butenes under flow–reactor conditions is reported.
Single crystalline catalysts based upon the σ-alkane complexes
[Rh(R2PCH2CH2PR2)(η2η2-NBA)][BArF4] (R
= Cy, tBu; NBA = norbornane; ArF = 3,5-(CF3)2C6H3) are prepared by hydrogenation
of a norbornadiene precursor. For the tBu-substituted system
this results in the loss of long-range order, which can be re-established
by addition of 1-butene to the material to form a mixture of [Rh(tBu2PCH2CH2PtBu2)(cis-2-butene)][BArF4] and [Rh(tBu2PCH2CH2PtBu2)(1-butene)][BArF4], in an order/disorder/order phase change. Deployment under flow-reactor
conditions results in very different on-stream stabilities. With R
= Cy rapid deactivation (3 h) to the butadiene complex occurs, [Rh(Cy2PCH2CH2PCy2)(butadiene)][BArF4], which can be reactivated by simple addition
of H2. While the equivalent butadiene complex does not
form with R = tBu at 298 K and on-stream conversion
is retained up to 90 h, deactivation is suggested to occur via loss
of crystallinity of the SMOM catalyst. Both systems operate under
the industrially relevant conditions of an isobutene co-feed. cis:trans
selectivites for 2-butene are biased in favor of cis for the tBu system and are more leveled for Cy.
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Affiliation(s)
| | - Cameron G. Royle
- Department of Chemistry, Chemistry Research Laboratories, University of Oxford, Oxford OX1 3TA, United Kingdom
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, United Kingsdom
| | - Samantha K. Furfari
- Department of Chemistry, Chemistry Research Laboratories, University of Oxford, Oxford OX1 3TA, United Kingdom
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, United Kingsdom
| | - Kongkiat Suriye
- SCG Chemicals, 1 Siam Cement Road, Bangsue, Bangkok 10800, Thailand
| | - Andrew S. Weller
- Department of Chemistry, Chemistry Research Laboratories, University of Oxford, Oxford OX1 3TA, United Kingdom
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, United Kingsdom
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11
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De Bellis J, Bellucci L, Bottaro G, Labella L, Marchetti F, Samaritani S, Belli Dell'Amico D, Armelao L. Single-crystal-to-single-crystal post-synthetic modifications of three-dimensional LOFs (Ln = Gd, Eu): a way to modulate their luminescence and thermometric properties. Dalton Trans 2020; 49:6030-6042. [PMID: 32319491 DOI: 10.1039/d0dt00449a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Single-crystal-to-single-crystal post-synthetic modifications of {[Ln2(H2L)3(DMF)4]·2DMF}n LOFs (Ln = Gd, Eu) to modulate their luminescence and thermometric properties.
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Affiliation(s)
- Jacopo De Bellis
- Dipartimento di Chimica e Chimica Industriale and CIRCC
- Università di Pisa
- Italy
| | - Luca Bellucci
- Dipartimento di Scienze Chimiche
- Università di Padova
- Italy
| | - Gregorio Bottaro
- Dipartimento di Scienze Chimiche
- Università di Padova
- Italy
- CNR ICMATE and INSTM
- Dipartimento di Scienze Chimiche
| | - Luca Labella
- Dipartimento di Chimica e Chimica Industriale and CIRCC
- Università di Pisa
- Italy
- CNR ICMATE and INSTM
- Dipartimento di Scienze Chimiche
| | - Fabio Marchetti
- Dipartimento di Chimica e Chimica Industriale and CIRCC
- Università di Pisa
- Italy
| | - Simona Samaritani
- Dipartimento di Chimica e Chimica Industriale and CIRCC
- Università di Pisa
- Italy
| | | | - Lidia Armelao
- Dipartimento di Scienze Chimiche
- Università di Padova
- Italy
- CNR ICMATE and INSTM
- Dipartimento di Scienze Chimiche
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Martínez‐Martínez AJ, Rees NH, Weller AS. Reversible Encapsulation of Xenon and CH 2 Cl 2 in a Solid-State Molecular Organometallic Framework (Guest@SMOM). Angew Chem Int Ed Engl 2019; 58:16873-16877. [PMID: 31539184 PMCID: PMC6899477 DOI: 10.1002/anie.201910539] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Indexed: 12/22/2022]
Abstract
Reversible encapsulation of CH2 Cl2 or Xe in a non-porous solid-state molecular organometallic framework of [Rh(Cy2 PCH2 PCy2 )(NBD)][BArF4 ] occurs in single-crystal to single-crystal transformations. These processes are probed by solid-state NMR spectroscopy, including 129 Xe SSNMR. Non-covalent interactions with the -CF3 groups, and hydrophobic channels formed, of [BArF4 ]- anions are shown to be important, and thus have similarity to the transport of substrates and products to and from the active site in metalloenzymes.
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Affiliation(s)
- Antonio J. Martínez‐Martínez
- Chemistry Research LaboratoriesDepartment of ChemistryUniversity of OxfordOxfordOX1 3TAUK
- Current Address: CIQSO-Centre for Research in Sustainable Chemistry and Department of ChemistryUniversity of HuelvaCampus El Carmen21007HuelvaSpain
| | - Nicholas H. Rees
- Chemistry Research LaboratoriesDepartment of ChemistryUniversity of OxfordOxfordOX1 3TAUK
| | - Andrew S. Weller
- Chemistry Research LaboratoriesDepartment of ChemistryUniversity of OxfordOxfordOX1 3TAUK
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