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Kato T, Nagae H, Yonehara K, Kitano T, Nagashima H, Tanaka S, Oku T, Mashima K. Continuous Plug Flow Process for the Transesterification of Methyl Acrylate and 1,4-Butanediol by a Zn-Immobilized Catalyst for Producing 4-Hydroxybutyl Acrylate. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Taito Kato
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka560-8531, Japan
- Corporate Research Division, Nippon Shokubai Company Limited, Suita, Osaka564-0034, Japan
| | - Haruki Nagae
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka560-8531, Japan
| | - Koji Yonehara
- Innovation & Business Development Division, Nippon Shokubai Company Limited, Suita, Osaka564-0034, Japan
| | - Tomoyuki Kitano
- Corporate Research Division, Nippon Shokubai Company Limited, Suita, Osaka564-0034, Japan
| | - Hiroki Nagashima
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki305-8565, Japan
| | - Shinji Tanaka
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki305-8565, Japan
| | - Tomoharu Oku
- Corporate Research Division, Nippon Shokubai Company Limited, Suita, Osaka564-0034, Japan
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka560-8531, Japan
- Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka, Suita, Osaka565-0871, Japan
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2
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Müller A, Comas-Vives A, Copéret C. Ga and Zn increase the oxygen affinity of Cu-based catalysts for the CO x hydrogenation according to ab initio atomistic thermodynamics. Chem Sci 2022; 13:13442-13458. [PMID: 36507169 PMCID: PMC9685501 DOI: 10.1039/d2sc03107h] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 09/18/2022] [Indexed: 11/10/2022] Open
Abstract
The direct hydrogenation of CO or CO2 to methanol, a highly vivid research area in the context of sustainable development, is typically carried out with Cu-based catalysts. Specific elements (so-called promoters) improve the catalytic performance of these systems under a broad range of reaction conditions (from pure CO to pure CO2). Some of these promoters, such as Ga and Zn, can alloy with Cu and their role remains a matter of debate. In that context, we used periodic DFT calculations on slab models and ab initio thermodynamics to evaluate both metal alloying and surface formation by considering multiple surface facets, different promoter concentrations and spatial distributions as well as adsorption of several species (O*, H*, CO* and ) for different gas phase compositions. Both Ga and Zn form an fcc-alloy with Cu due to the stronger interaction of the promoters with Cu than with themselves. While the Cu-Ga-alloy is more stable than the Cu-Zn-alloy at low promoter concentrations (<25%), further increasing the promoter concentration reverses this trend, due to the unfavoured Ga-Ga-interactions. Under CO2 hydrogenation conditions, a substantial amount of O* can adsorb onto the alloy surfaces, resulting in partial dealloying and oxidation of the promoters. Therefore, the CO2 hydrogenation conditions are actually rather oxidising for both Ga and Zn despite the large amount of H2 present in the feedstock. Thus, the growth of a GaO x /ZnO x overlayer is thermodynamically preferred under reaction conditions, enhancing CO2 adsorption, and this effect is more pronounced for the Cu-Ga-system than for the Cu-Zn-system. In contrast, under CO hydrogenation conditions, fully reduced and alloyed surfaces partially covered with H* and CO* are expected, with mixed CO/CO2 hydrogenation conditions resulting in a mixture of reduced and oxidised states. This shows that the active atmosphere tunes the preferred state of the catalyst, influencing the catalytic activity and stability, indicating that the still widespread image of a static catalyst under reaction conditions is insufficient to understand the complex interplay of processes taking place on a catalyst surface under reaction conditions, and that dynamic effects must be considered.
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Affiliation(s)
- Andreas Müller
- Department of Chemistry and Applied Biosciences, ETH Zürich8093 ZurichSwitzerland+41 44 633 93 94
| | - Aleix Comas-Vives
- Institute of Materials Chemistry, TU Wien1060 ViennaAustria,Departament de Química, Universitat Autònoma de Barcelona08193 Cerdanyola del VallèsCataloniaSpain
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich8093 ZurichSwitzerland+41 44 633 93 94
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Syed ZH, Mian MR, Patel R, Xie H, Pengmei Z, Chen Z, Son FA, Goetjen TA, Chapovetsky A, Fahy KM, Sha F, Wang X, Alayoglu S, Kaphan DM, Chapman KW, Neurock M, Gagliardi L, Delferro M, Farha OK. Sulfated Zirconium Metal–Organic Frameworks as Well-Defined Supports for Enhancing Organometallic Catalysis. J Am Chem Soc 2022; 144:16883-16897. [DOI: 10.1021/jacs.2c05290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zoha H. Syed
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Mohammad Rasel Mian
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Roshan Patel
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Haomiao Xie
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Zihan Pengmei
- Department of Chemistry, Chicago Center for Theoretical Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Zhihengyu Chen
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Florencia A. Son
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Timothy A. Goetjen
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Alon Chapovetsky
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Kira M. Fahy
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Fanrui Sha
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Xingjie Wang
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Selim Alayoglu
- Center for Catalysis and Surface Science, Northwestern University, Evanston, Illinois 60208, United States
| | - David M. Kaphan
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Karena W. Chapman
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Matthew Neurock
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Laura Gagliardi
- Department of Chemistry, Chicago Center for Theoretical Chemistry, University of Chicago, Chicago, Illinois 60637, United States
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Massimiliano Delferro
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Omar K. Farha
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
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4
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Boudjelel M, Riedel R, Schrock RR, Conley MP, Berges AJ, Carta V. Tungstacyclopentane Ring Contraction Yields Olefin Metathesis Catalysts. J Am Chem Soc 2022; 144:10929-10942. [PMID: 35675389 DOI: 10.1021/jacs.2c03732] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Exposure of a solution of the square pyramidal tungstacyclopentane complex W(NAr)(OSiPh3)2(C4H8) (Ar = 2,6-i-Pr2C6H3) to ethylene at 22 °C in ambient (fluorescent) light slowly leads to the formation of propylene and the square pyramidal tungstacyclobutane complex W(NAr)(OSiPh3)2(C3H6). No reaction takes place in the dark, but the reaction is >90% complete in ∼15 min under blue LED light (∼450 nm λmax). The intermediates are proposed to be (first) an α methyl tungstacyclobutane complex (W(NAr)(OSiPh3)2(αMeC3H5)), and then from it, a β methyl version. The TBP versions of each can lose propylene and form a methylene complex, and in the presence of ethylene, the unsubstituted tungstacyclobutane complex W(NAr)(OSiPh3)2(C3H6). The W-Cα bond in an unobservable TBP W(NAr)(OSiPh3)2(C4H8) isomer in which the C4H8 ring is equatorial is proposed to be cleaved homolytically by light. A hydrogen atom moves or is moved from C3 to the terminal C4 carbon in the butyl chain as the bond between W and C3 forms to give the TBP α methyl tungstacyclobutane complex. Essentially, the same behavior is observed for W(NCPh3)(OSiPh3)2(C4H8) as for W(NAr)(OSiPh3)2(C4H8), except that the rate of consumption of W(NCPh3)(OSiPh3)2(C4H8) is about half that of W(NAr)(OSiPh3)2(C4H8). In this case, an α methyl-substituted tungstacyclobutane intermediate is observed, and the overall rate of formation of W(NCPh3)(OSiPh3)2(C3H6) and propylene from W(NCPh3)(OSiPh3)2(C4H8) is ∼20 times slower than in the NAr system. These results constitute the first experimentally documented examples of forming a metallacyclobutane ring from a metallacyclopentane ring (ring contraction) and establish how metathesis-active methylene and metallacyclobutane complexes can be formed and reformed in the presence of ethylene. They also raise the possibility that ambient light could play a role in some metathesis reactions that involve ethylene and tungsten-based imido alkylidene olefin metathesis catalysts, if not others.
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Affiliation(s)
- Maxime Boudjelel
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
| | - René Riedel
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
| | - Richard R Schrock
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
| | - Matthew P Conley
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
| | - Adam J Berges
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
| | - Veronica Carta
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
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5
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Roca Jungfer M, Abram U. Unlocking Air- and Water-Stable Technetium Acetylides and Other Organometallic Complexes. Inorg Chem 2022; 61:7765-7779. [PMID: 35548933 DOI: 10.1021/acs.inorgchem.2c00070] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The first technetium complexes containing anionic alkynido ligands in an end-on coordination mode have been prepared by using the nonprotic, cationic precursor mer,trans-[Tc(SMe2)(CO)3(PPh3)2]+. This cation acts as a functional analogue of the highly reactive 16-electron metallo Lewis acid {Tc(CO)3(PPh3)2}+ in reactions with alkynes, acetylides, and other organometallic reagents. Such reactions give a variety of organometallic technetium complexes in excellent yields and enable the preparation of [Tc(CH3)(CO)3(PPh3)2], [Tc(Ph)(CO)3(PPh3)2], [Tc(Cp)(CO)2(PPh3)], [Tc(═CCH2CH2CH2O)(CO)3(PPh3)2]+, [Tc(═CCH2CH2CH2CH2O)(CO)3(PPh3)2]+, [Tc(C≡C-H)(CO)3(PPh3)2], [Tc(C≡C-Ph)(CO)3(PPh3)2], [Tc(C≡C-tBu)(CO)3(PPh3)2], [Tc(C≡C-nBu)(CO)3(PPh3)2], [Tc(C≡C-SiMe3)(CO)3(PPh3)2], and [Tc{C≡C-C6H3(CF3)2}(CO)3(PPh3)2]. The bonding situation in the alkynyl complexes is compared to that in corresponding alkyl- and arylnitrile and -isonitrile complexes. [Tc(N≡C-Ph)(CO)3(PPh3)2](BF4), [Tc(C≡N-Ph)(CO)3(PPh3)2](BF4), [Tc(N≡C-tBu)(CO)3(PPh3)2](BF4), and [Tc(C≡N-tBu)(CO)3(PPh3)2](BF4) were prepared in high yields by ligand exchange reactions starting from mer,trans-[Tc(OH2)(CO)3(PPh3)2](BF4). The novel complexes were characterized by single-crystal X-ray diffraction and spectroscopic methods. In particular, 99Tc nuclear magnetic resonance spectroscopy proved to be an invaluable and sensitive tool for the characterization of the complexes. Density functional theory calculations strongly suggest similar bonding situations for the related alkynyl, nitrile, and isonitrile complexes of technetium.
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Affiliation(s)
- Maximilian Roca Jungfer
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstrasse 34/36, D-14195 Berlin, Germany
| | - Ulrich Abram
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstrasse 34/36, D-14195 Berlin, Germany
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6
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Zaera F. Designing Sites in Heterogeneous Catalysis: Are We Reaching Selectivities Competitive With Those of Homogeneous Catalysts? Chem Rev 2022; 122:8594-8757. [PMID: 35240777 DOI: 10.1021/acs.chemrev.1c00905] [Citation(s) in RCA: 69] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A critical review of different prominent nanotechnologies adapted to catalysis is provided, with focus on how they contribute to the improvement of selectivity in heterogeneous catalysis. Ways to modify catalytic sites range from the use of the reversible or irreversible adsorption of molecular modifiers to the immobilization or tethering of homogeneous catalysts and the development of well-defined catalytic sites on solid surfaces. The latter covers methods for the dispersion of single-atom sites within solid supports as well as the use of complex nanostructures, and it includes the post-modification of materials via processes such as silylation and atomic layer deposition. All these methodologies exhibit both advantages and limitations, but all offer new avenues for the design of catalysts for specific applications. Because of the high cost of most nanotechnologies and the fact that the resulting materials may exhibit limited thermal or chemical stability, they may be best aimed at improving the selective synthesis of high value-added chemicals, to be incorporated in organic synthesis schemes, but other applications are being explored as well to address problems in energy production, for instance, and to design greener chemical processes. The details of each of these approaches are discussed, and representative examples are provided. We conclude with some general remarks on the future of this field.
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Affiliation(s)
- Francisco Zaera
- Department of Chemistry and UCR Center for Catalysis, University of California, Riverside, California 92521, United States
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7
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Ghosh AC, Legrand A, Rajapaksha R, Craig GA, Sassoye C, Balázs G, Farrusseng D, Furukawa S, Canivet J, Wisser FM. Rhodium-Based Metal-Organic Polyhedra Assemblies for Selective CO 2 Photoreduction. J Am Chem Soc 2022; 144:3626-3636. [PMID: 35179874 DOI: 10.1021/jacs.1c12631] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Heterogenization of molecular catalysts via their immobilization within extended structures often results in a lowering of their catalytic properties due to a change in their coordination sphere. Metal-organic polyhedra (MOP) are an emerging class of well-defined hybrid compounds with a high number of accessible metal sites organized around an inner cavity, making them appealing candidates for catalytic applications. Here, we demonstrate a design strategy that enhances the catalytic properties of dirhodium paddlewheels heterogenized within MOP (Rh-MOP) and their three-dimensional assembled supramolecular structures, which proved to be very efficient catalysts for the selective photochemical reduction of carbon dioxide to formic acid. Surprisingly, the catalytic activity per Rh atom is higher in the supramolecular structures than in its molecular sub-unit Rh-MOP or in the Rh-metal-organic framework (Rh-MOF) and yields turnover frequencies of up to 60 h-1 and production rates of approx. 76 mmole formic acid per gram of the catalyst per hour, unprecedented in heterogeneous photocatalysis. The enhanced catalytic activity is investigated by X-ray photoelectron spectroscopy and electrochemical characterization, showing that self-assembly into supramolecular polymers increases the electron density on the active site, making the overall reaction thermodynamically more favorable. The catalyst can be recycled without loss of activity and with no change of its molecular structure as shown by pair distribution function analysis. These results demonstrate the high potential of MOP as catalysts for the photoreduction of CO2 and open a new perspective for the electronic design of discrete molecular architectures with accessible metal sites for the production of solar fuels.
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Affiliation(s)
- Ashta C Ghosh
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON-UMR 5256, 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
| | - Alexandre Legrand
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, 606-8501 Kyoto, Japan
| | - Rémy Rajapaksha
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON-UMR 5256, 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
| | - Gavin A Craig
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, 606-8501 Kyoto, Japan.,Department of Pure and Applied Chemistry, University of Strathclyde, G11XL Glasgow, Scotland
| | - Capucine Sassoye
- Sorbonne Université, Chimie de la Matière Condensée de Paris-UMR 7574, 4 Place Jussieu, 75005 Paris, France
| | - Gábor Balázs
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - David Farrusseng
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON-UMR 5256, 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
| | - Shuhei Furukawa
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Yoshida, Sakyo-ku, 606-8501 Kyoto, Japan
| | - Jérôme Canivet
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON-UMR 5256, 2 Avenue Albert Einstein, 69626 Villeurbanne Cedex, France
| | - Florian M Wisser
- Institute of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
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Zubkevich SV, Tuskaev VA, Gagieva SC, Bulychev BM. Catalytic oligomerization and polymerization of ethylene with complexes of iron triad metals: influence of metal nature and new perspectives. RUSSIAN CHEMICAL REVIEWS 2022. [DOI: 10.1070/rcr5021] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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9
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Zhizhko PA, Bushkov NS, Pichugov AV, Zarubin DN. Oxo/imido heterometathesis: From molecular stoichiometric studies to well-defined heterogeneous catalysts. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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10
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Liu S, Boudjelel M, Schrock RR, Conley MP, Tsay C. Interconversion of Molybdenum or Tungsten d 2 Styrene Complexes with d 0 1-Phenethylidene Analogues. J Am Chem Soc 2021; 143:17209-17218. [PMID: 34633807 DOI: 10.1021/jacs.1c08086] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Upon addition of 5-15% PhNMe2H+X- (X = B(3,5-(CF3)2C6H3)4 or B(C6F5)4) to Mo(NAr)(styrene)(OSiPh3)2 (Ar = N-2,6-i-Pr2C6H3) in C6D6 an equilibrium mixture of Mo(NAr)(styrene)(OSiPh3)2 and Mo(NAr)(CMePh)(OSiPh3)2 is formed over 36 h at 45 °C (Keq = 0.36). A plausible intermediate in the interconversion of the styrene and 1-phenethylidene complexes is the 1-phenethyl cation, [Mo(NAr)(CHMePh)(OSiPh3)2]+, which can be generated using [(Et2O)2H][B(C6F5)4] as the acid. The interconversion can be modeled as two equilibria involving protonation of Mo(NAr)(styrene)(OSiPh3)2 or Mo(NAr)(CMePh)(OSiPh3)2 and deprotonation of the α or β phenethyl carbon atom in [Mo(NAr)(CHMePh)(OSiPh3)2]+. The ratio of the rate of deprotonation of [Mo(NAr)(CHMePh)(OSiPh3)2]+ by PhNMe2 in the α position versus the β position is ∼10, or ∼30 per Hβ. The slow step is protonation of Mo(NAr)(styrene)(OSiPh3)2 (k1 = 0.158(4) L/(mol·min)). Proton sources such as (CF3)3COH or Ph3SiOH do not catalyze the interconversion of Mo(NAr)(styrene)(OSiPh3)2 and Mo(NAr)(CMePh)(OSiPh3)2, while the reaction of Mo(NAr)(styrene)(OSiPh3)2 with pyridinium salts generates only a trace (∼2%) of Mo(NAr)(CMePh)(OSiPh3)2 and forms a monopyridine adduct, [Mo(NAr)(CHMePh)(OSiPh3)2(py)]+ (two diastereomers). The structure of [Mo(NAr)(CHMePh)(OSiPh3)2]+ has been confirmed in an X-ray study; there is no structural indication that a β proton is activated through a CHβ interaction with the metal. W(NAr)(CMePh)(OSiPh3)2 is also converted into a mixture of W(NAr)(CMePh)(OSiPh3)2 and W(NAr)(styrene)(OSiPh3)2 (Keq = 0.47 at 45 °C in favor of the styrene complex) with 10% [PhNMe2H][B(C6F5)4] as the catalyst; the time required to reach equilibrium is approximately the same as in the Mo system.
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Affiliation(s)
- Sumeng Liu
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
| | - Maxime Boudjelel
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
| | - Richard R Schrock
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
| | - Matthew P Conley
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
| | - Charlene Tsay
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
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11
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Praveen CS, Borosy AP, Copéret C, Comas-Vives A. Strain in Silica-Supported Ga(III) Sites: Neither Too Much nor Too Little for Propane Dehydrogenation Catalytic Activity. Inorg Chem 2021; 60:6865-6874. [PMID: 33545002 PMCID: PMC8483445 DOI: 10.1021/acs.inorgchem.0c03135] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Well-defined Ga(III) sites on SiO2 are highly active, selective, and stable catalysts in the propane dehydrogenation (PDH) reaction. In this contribution, we evaluate the catalytic activity toward PDH of tricoordinated and tetracoordinated Ga(III) sites on SiO2 by means of first-principles calculations using realistic amorphous periodic SiO2 models. We evaluated the three reaction steps in PDH, namely, the C-H activation of propane to form propyl, the β-hydride (β-H) transfer to form propene and a gallium hydride, and the H-H coupling to release H2, regenerating the initial Ga-O bond and closing the catalytic cycle. Our work shows how Brønsted-Evans-Polanyi relationships are followed to a certain extent for these three reaction steps on Ga(III) sites on SiO2 and highlights the role of the strain of the reactive Ga-O pairs on such sites of realistic amorphous SiO2 models. It also shows how transition-state scaling holds very well for the β-H transfer step. While highly strained sites are very reactive sites for the initial C-H activation, they are more difficult to regenerate. The corresponding less strained sites are not reactive enough, pointing to the need for the right balance in strain to be an effective site for PDH. Overall, our work provides an understanding of the intrinsic activity of acidic Ga single sites toward the PDH reaction and paves the way toward the design and prediction of better single-site catalysts on SiO2 for the PDH reaction.
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Affiliation(s)
- C S Praveen
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - A P Borosy
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - C Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - A Comas-Vives
- Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain
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12
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Boudjelel M, Zhai F, Schrock RR, Hoveyda AH, Tsay C. Oxo 2-Adamantylidene Complexes of Mo(VI) and W(VI). Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00086] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maxime Boudjelel
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
| | - Feng Zhai
- Department of Chemistry 6-331, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Richard R. Schrock
- Department of Chemistry 6-331, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
| | - Amir H. Hoveyda
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Charlene Tsay
- Department of Chemistry, University of California at Riverside, Riverside, California 92521, United States
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13
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Duanghathaipornsuk S, Kim DS, Phares TL, Li CH, Jinschek JR, Alba-Rubio AC. Supersensitive CeO x-based nanocomposite sensor for the electrochemical detection of hydroxyl free radicals. NANOSCALE 2021; 13:5136-5144. [PMID: 33651058 DOI: 10.1039/d1nr00015b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
It is well known that an excess of hydroxyl radicals (˙OH) in the human body is responsible for oxidative stress-related diseases. An understanding of the relationship between the concentration of ˙OH and those diseases could contribute to better diagnosis and prevention. Here we present a supersensitive nanosensor integrated with an electrochemical method to measure the concentration of ˙OH in vitro. The electrochemical sensor consists of a composite comprised of ultrasmall cerium oxide nanoclusters (<2 nm) grafted to a highly conductive carbon deposited on a screen-printed carbon electrode (SPCE). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to analyze the interaction between cerium oxide nanoclusters and ˙OH. The CV results demonstrated that this electrochemical sensor had the capacity of detecting ˙OH with a high degree of accuracy and selectivity, achieving a consistent performance. Additionally, EIS results confirmed that our electrochemical sensor was able to differentiate ˙OH from hydrogen peroxide (H2O2), which is another common reactive oxygen species (ROS) found in the human body. The limit of detection (LOD) observed with this electrochemical sensor was of 0.6 μM. Furthermore, this nanosized cerium oxide-based electrochemical sensor successfully detected in vitro the presence of ˙OH in preosteoblast cells from newborn mouse bone tissue. The supersensitive electrochemical sensor is expected to be beneficially used in multiple applications, including medical diagnosis, fuel-cell technology, and food and cosmetic industries.
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Affiliation(s)
| | - Dong-Shik Kim
- Department of Chemical Engineering, The University of Toledo, Toledo, OH 43606, USA.
| | - Tamara L Phares
- Department of Bioengineering, The University of Toledo, Toledo, OH 43606, USA
| | - Cheng-Han Li
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Joerg R Jinschek
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Ana C Alba-Rubio
- Department of Chemical Engineering, The University of Toledo, Toledo, OH 43606, USA.
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Lamb JV, Abell JC, McLaren JE, Buffet JC, Turner ZR, O'Hare D. Slurry-phase ethylene polymerisation using group 4 ansa-bridged permethylindenyl complexes supported on polymethylaluminoxane. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2019.110735] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Zhizhko PA, Pichugov AV, Bushkov NS, Rumyantsev AV, Utegenov KI, Talanova VN, Strelkova TV, Lebedev D, Mance D, Zarubin DN. Catalytic Imido-Transfer Reactions of Well-Defined Silica-Supported Titanium Imido Complexes Prepared via Surface Organometallic Chemistry. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00779] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pavel A. Zhizhko
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
| | - Andrey V. Pichugov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
- Higher Chemical College, D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, 125047 Moscow, Russia
| | - Nikolai S. Bushkov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
- Department of Chemistry, Moscow State University, Vorob’evy Gory, 1, 119991 Moscow, Russia
| | - Andrey V. Rumyantsev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
- Department of Chemistry, Moscow State University, Vorob’evy Gory, 1, 119991 Moscow, Russia
| | - Kamil I. Utegenov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
| | - Valeria N. Talanova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
| | - Tatyana V. Strelkova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
| | - Dmitry Lebedev
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog Weg, 1−5, CH-8093 Zürich, Switzerland
| | - Deni Mance
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog Weg, 1−5, CH-8093 Zürich, Switzerland
| | - Dmitry N. Zarubin
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov str., 28, 119991 Moscow, Russia
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16
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Puyo M, Fau P, Kahn ML, Mesguich D, Launay J, Fajerwerg K. Removable Composite Electrode Made of Silver Nanoparticles on Pyrolyzed Photoresist Film for the Electroreduction of 4-Nitrophenol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14194-14202. [PMID: 31550887 DOI: 10.1021/acs.langmuir.9b02405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Access to removable nanocomposite electrodes for electrosensing of pollutants is of great importance. However, the preparation of reproducible and reliable carbon electrodes decorated with metallic nanoparticles, a prerequisite for trustworthy devices, remains a challenge. Here we describe an innovative and easy method to prepare such electrodes. These latter are silicon-coated with a thin carbon film on which controlled silver nanostructures are grafted. Different silver nanostructures and surface coverage of the carbon electrode (16, 36, 51, and 67%) can be obtained through a careful control of the time of the hydrogenolysis of the N-N' isopropyl butylamidinate silver organometallic precursor (t = 1, 5, 15, and 60 min, respectively). Importantly, all nanocomposite surfaces are efficient for the electrodetection of 4-nitrophenol with a remarkable decrease of the overpotential of the reduction of such molecule up to 330 mV. The surfaces are characterized by atomic force microscopy, grazing incidence X-ray diffraction, scanning electronic microscopy, and Raman spectroscopy. Furthermore, surface-enhanced Raman scattering effect is also observed. The exaltation of the Raman intensity is proportional to the surface coverage of the electrode; the number of hot spots increases with the surface coverage.
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Affiliation(s)
- Maxime Puyo
- LCC-CNRS , University of Toulouse , 205 route de Narbonne , F-31077 Toulouse , France
| | - Pierre Fau
- LCC-CNRS , University of Toulouse , 205 route de Narbonne , F-31077 Toulouse , France
| | - Myrtil L Kahn
- LCC-CNRS , University of Toulouse , 205 route de Narbonne , F-31077 Toulouse , France
| | - David Mesguich
- CIRIMAT , University of Toulouse, CNRS, Université Toulouse 3 Paul-Sabatier , 118 route de Narbonne , F-31062 Toulouse cedex 9 , France
| | - Jérôme Launay
- LAAS-CNRS , University of Toulouse , 7 avenue du colonel Roche , F-31077 Toulouse , France
| | - Katia Fajerwerg
- LCC-CNRS , University of Toulouse , 205 route de Narbonne , F-31077 Toulouse , France
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17
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Abstract
Olefin metathesis is the catalytic transformation of olefinic substrates, finding a wide range of applications in organic synthesis. The mesoporous molecular sieve Santa Barbara Amorphous (SBA-15) has proven to be an excellent support for metathesis catalysts thanks to its regular mesoporous structure, high BET area, and large pore volume. A survey of catalysts consisting of (i) molybdenum and tungsten oxides on SBA-15, and (ii) molybdenum and ruthenium organometallic complexes (Schrock and Grubbs-type carbenes) on SBA-15 is provided together with their characterization and catalytic performance in various metathesis reactions. The comparison with catalysts based on other supports demonstrates the high quality of the mesoporous molecular sieve SBA-15 as an advanced catalyst support.
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18
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Copéret C. Single-Sites and Nanoparticles at Tailored Interfaces Prepared via Surface Organometallic Chemistry from Thermolytic Molecular Precursors. Acc Chem Res 2019; 52:1697-1708. [PMID: 31150207 DOI: 10.1021/acs.accounts.9b00138] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Heterogeneous catalysts are complex by nature, making particularly difficult to assess the structure of their active sites. Such complexity is inherited in part from their mode of preparation, which typically involves coprecipitation or impregnation of metal salts in aqueous solution, and the associated complex surface chemistries. In this context, surface organometallic chemistry (SOMC) has emerged as a powerful approach to generate well-defined surface species, where the metal sites are introduced by grafting tailored molecular precursors. When combined with thermolytic molecular precursors (TMPs) that can lose their organic moieties quite readily upon thermal treatment, SOMC provides access to supported isolated metal sites with defined oxidation state and nuclearity inherited from the precursor. The resulting surface species bear unusual coordination imposed by the surface that provides them high reactivity in comparison with their molecular precursor. In addition, these molecularly defined species bare strong resemblance with the active sites of supported metal oxides. However, they typically contain a higher proportion of active sites making structure-activity relationship possible. They thus constitute ideal models for this important class of industrial catalysts that are used in numerous applications such as olefin epoxidation (Shell process), olefin metathesis (triolefin process), ethylene polymerization (Phillips catalysts), or propane dehydrogenation (Catofin and related processes). This SOMC/TMP approach can thus provide detailed information about the structure of active sites in industrial catalysts, their mode of initiation and deactivation, as well as the role of the support and specific thermal treatment on the final activity of the catalysts. Nonetheless, these structurally characterized surface sites still exhibit heterogeneous environments borrowed from the support itself, that explain the intrinsic complexity of heterogeneous catalysis. Furthermore, SOMC/TMP can also be used to generate and investigate supported metal nanoparticles. Starting from the well-defined isolated sites, that also contain adjacent surface OH groups, one can graft a second metal and then generate after treatment under hydrogen small and narrowly dispersed alloys or nanoparticles with tailored interfaces that can show improved catalytic performances and are amiable to detailed structure-activity relationships. This approach is illustrated by two case studies: (1) formation of supported copper nanoparticles at tailored interfaces that contain isolated metal sites for the selective hydrogenation of carbon dioxide to methanol, allowing for a detailed understanding of the role of dopants and supports in heterogeneous catalysis, and (2) preparation of highly selective and productive propane dehydrogenation catalysts based on silica-supported Pt xGa y alloy. Overall, this Account shows how the combination of SOMC and TMP helps to generate catalysts, particularly suited for elucidating structural characterization of active sites at a molecular-level which in turn enables structure-activity relationship to be drawn. Such detailed information obtained on well-defined catalysts can then be used to understand complex effects observed in industrial catalysts (effects of supports, additives, dopants, etc.), and to extract information that can then be used to improve them in a more rational way.
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Affiliation(s)
- Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg. 1-5, CH-8093 Zürich, Switzerland
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19
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Anand M, Siahrostami S, Nørskov JK. Exploring the Effect of Gold Support on the Oxygen Reduction Reaction Activity of Metal Porphycenes. ChemCatChem 2018. [DOI: 10.1002/cctc.201801408] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Megha Anand
- Department of Chemical Engineering SUNCAT Center for Surface Science and CatalysisStanford University Stanford CA-94035 USA
- Department of PhysicsTechnical University of Denmark Kongens Lyngby 2800 Denmark
| | - Samira Siahrostami
- Department of Chemical Engineering SUNCAT Center for Surface Science and CatalysisStanford University Stanford CA-94035 USA
| | - Jens K. Nørskov
- Department of Chemical Engineering SUNCAT Center for Surface Science and CatalysisStanford University Stanford CA-94035 USA
- Department of PhysicsTechnical University of Denmark Kongens Lyngby 2800 Denmark
- SUNCAT Center for Surface Science and CatalysisSLAC National Laboratory Menlo Park CA-94025 USA
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20
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Langeslay RR, Sohn H, Hu B, Mohar JS, Ferrandon M, Liu C, Kim H, Jeremy Kropf A, Yang C, Niklas J, Poluektov OG, Ercan Alp E, Ignacio-de Leon P, Sattelberger AP, Hock AS, Delferro M. Nuclearity effects in supported, single-site Fe(ii) hydrogenation pre-catalysts. Dalton Trans 2018; 47:10842-10846. [PMID: 30015817 DOI: 10.1039/c8dt02720j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Dimeric and monomeric supported single-site Fe(ii) pre-catalysts on SiO2 have been prepared via organometallic grafting and characterized with advanced spectroscopic techniques. Manipulation of the surface hydroxyl concentration on the support influences monomer/dimer formation. While both pre-catalysts are highly active in liquid-phase hydrogenation, the dimeric pre-catalyst is ∼3× faster than the monomer. Preliminary XAS experiments on the H2-activated samples suggest the active species are isolated Fe(ii) sites.
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Affiliation(s)
- Ryan R Langeslay
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL 60439, USA.
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21
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Copéret C, Allouche F, Chan KW, Conley MP, Delley MF, Fedorov A, Moroz IB, Mougel V, Pucino M, Searles K, Yamamoto K, Zhizhko PA. Bridging the Gap between Industrial and Well‐Defined Supported Catalysts. Angew Chem Int Ed Engl 2018; 57:6398-6440. [DOI: 10.1002/anie.201702387] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Florian Allouche
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Ka Wing Chan
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Matthew P. Conley
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
- Current address: Department of ChemistryUniversity of California, Riverside 501 Big Springs Road Riverside CA 92521 USA
| | - Murielle F. Delley
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Alexey Fedorov
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Ilia B. Moroz
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
- Current address: Laboratoire de Chimie des Processus Biologiques, UMR CNRS 8229, Collège de FranceUniversité Pierre et Marie Curie 11 Place Marcelin Berthelot 75005 Paris France
| | - Margherita Pucino
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Keith Searles
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Keishi Yamamoto
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
| | - Pavel A. Zhizhko
- Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Switzerland
- A. N. Nesmeyanov Institute of Organoelement CompoundsRussian Academy of Sciences Vavilov street 28 119991 Moscow Russia
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22
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Cook AK, Copéret C. Alkyne Hydroamination Catalyzed by Silica-Supported Isolated Zn(II) Sites. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00202] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amanda K. Cook
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
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23
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Wei Y, Mao Z, Li Z, Zhang F, Li H. Aerosol-Assisted Rapid Fabrication of a Heterogeneous Organopalladium Catalyst with Hierarchical Bimodal Pores. ACS APPLIED MATERIALS & INTERFACES 2018; 10:13914-13923. [PMID: 29617104 DOI: 10.1021/acsami.8b04543] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Heterogeneous organometallic catalysts with well-defined active sites and hierarchical pores hold tremendous promise for efficient and eco-friendly chemical processes. However, the simple and scalable preparation of these materials remains difficult to date, which has hampered a more broad application scope. Herein, we reported a low-cost, rapid, and scalable aerosol-assisted assembly approach for the synthesis of a well-defined PdDPP (PdCl2(PPh2(CH2)2))_ complex-containing benzene-bridged organosilica-based catalyst with a hierarchical bimodal micro-macroporous structure. This novel material was realized by using Pd(II) organometallic silane (Pd[PPh2(CH2)2Si(OEt)3]2Cl2) as the active species, organosilane 1,4-bis(triethoxysilyl)benzene (Ph[Si(OEt)3]2) as the silicate scaffold and the surfactant cetyltrimethylammonium bromide and the inorganic salt NaCl as the dual templates on a home-built aerosol spraying-instrument. Multiple techniques including X-ray photoelectron spectroscopy and solid-state NMR spectra revealed that the organopalladium complex with a well-defined molecular configuration of major trans model and minor cis model existed in the phenyl-functionalized silica material. As expected, it efficiently promoted a variety of important carbon-carbon cross-coupling transformations including Tsuji-Trost, Sonogashira, and Suzuki reactions in pure water without the assistance of any additives. In comparison with the homogeneous catalyst PdCl2(PPh2CH3)2, it even exhibited enhanced activity and selectivity in some cases owing to the unique confinement effect and the shape selectivity generated from the hierarchical porous structure. Meanwhile, it was easily recycled and reused eight times without the loss of its activity.
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Affiliation(s)
- Yongyi Wei
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
| | - Zhan Mao
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
| | - Zhenzhong Li
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
| | - Fang Zhang
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
| | - Hexing Li
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , China
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Zhang J, Motta A, Gao Y, Stalzer MM, Delferro M, Liu B, Lohr TL, Marks TJ. Cationic Pyridylamido Adsorbate on Brønsted Acidic Sulfated Zirconia: A Molecular Supported Organohafnium Catalyst for Olefin Homo- and Co-Polymerization. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00611] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Jialong Zhang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Alessandro Motta
- Dipartimento di Scienze Chimiche, Università di Roma “La Sapienza” and INSTM, UdR Roma, I-00185 Roma, Italy
| | - Yanshan Gao
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Madelyn Marie Stalzer
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Massimiliano Delferro
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Boping Liu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Tracy L. Lohr
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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25
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Copéret C, Allouche F, Chan KW, Conley MP, Delley MF, Fedorov A, Moroz IB, Mougel V, Pucino M, Searles K, Yamamoto K, Zhizhko PA. Eine Brücke zwischen industriellen und wohldefinierten Trägerkatalysatoren. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201702387] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Christophe Copéret
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Florian Allouche
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Ka Wing Chan
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Matthew P. Conley
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
- Department of ChemistryUniversity of California, Riverside 501 Big Springs Road Riverside CA 92521 USA
| | - Murielle F. Delley
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Alexey Fedorov
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Ilia B. Moroz
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Victor Mougel
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
- Laboratoire de Chimie des Processus Biologiques, UMR CNRS 8229, Collège de FranceUniversité Pierre et Marie Curie 11 Place Marcelin Berthelot 75005 Paris Frankreich
| | - Margherita Pucino
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Keith Searles
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Keishi Yamamoto
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
| | - Pavel A. Zhizhko
- Departement Chemie und Angewandte Biowissenschaften, ETH Zürich Vladimir-Prelog-Weg 1–5 8093 Zürich Schweiz
- A. N. Nesmeyanow-Institut für Elementorganische VerbindungenRussische Akademie der Wissenschaften Vavilov str. 28 119991 Moskau Russland
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26
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Yamamoto K, Chan KW, Mougel V, Nagae H, Tsurugi H, Safonova OV, Mashima K, Copéret C. Silica-supported isolated molybdenum di-oxo species: formation and activation with organosilicon agent for olefin metathesis. Chem Commun (Camb) 2018; 54:3989-3992. [DOI: 10.1039/c8cc01876f] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A well-defined silica-supported molybdenum dioxo species, (SiO)2Mo(O)2, prepared via Surface Organometallic Chemistry, is highly active in metathesis upon reaction with organosilicon reducing agent.
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Affiliation(s)
- Keishi Yamamoto
- Department of Chemistry and Applied Biosciences
- ETH Zürich
- Zürich
- Switzerland
| | - Ka Wing Chan
- Department of Chemistry and Applied Biosciences
- ETH Zürich
- Zürich
- Switzerland
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences
- ETH Zürich
- Zürich
- Switzerland
| | - Haruki Nagae
- Department of Chemistry and Applied Biosciences
- ETH Zürich
- Zürich
- Switzerland
- Department of Chemistry
| | - Hayato Tsurugi
- Department of Chemistry
- Graduate School of Engineering Science
- Osaka University
- Osaka 560-8531
- Japan
| | | | - Kazushi Mashima
- Department of Chemistry
- Graduate School of Engineering Science
- Osaka University
- Osaka 560-8531
- Japan
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences
- ETH Zürich
- Zürich
- Switzerland
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27
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Wang X, Thiel I, Fedorov A, Copéret C, Mougel V, Fontecave M. Site-isolated manganese carbonyl on bipyridine-functionalities of periodic mesoporous organosilicas: efficient CO 2 photoreduction and detection of key reaction intermediates. Chem Sci 2017; 8:8204-8213. [PMID: 29568468 PMCID: PMC5857931 DOI: 10.1039/c7sc03512h] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 10/08/2017] [Indexed: 01/30/2023] Open
Abstract
Well-defined and fully characterized supported CO2 reduction catalysts are developed through the immobilization of an earth abundant Mn complex on bpy-PMO (bpy = bipyridine; PMO = Periodic Mesoporous Organosilica) platform materials. The resulting isolated Mn-carbonyl centers coordinated to bipyridine functionalities of bpy-PMO catalyze the photoreduction of CO2 into CO and HCOOH with up to ca. 720 TON in the presence of BIH (1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzoimidazole), used as the electron donor. A broad range of photochemical conditions (varying solvents, sacrificial electron donors, photosensitizer type and concentration, catalyst loading as well as the Mn loading within the PMO) are investigated, demonstrating high activity even for simple organic dyes and Zn-porphyrin as photosensitizers. Spectroscopic and catalytic data also indicate that site isolation of the Mn complex in the PMO framework probably inhibits bimolecular processes such as dimerisation and disproportionation and thus allows the spectroscopic observation of key reaction intermediates, namely the two meridional isomers of the carbonyl complexes and the bipyridine radical anion species.
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Affiliation(s)
- Xia Wang
- Laboratoire de Chimie des Processus Biologiques , UMR 8229 , CNRS , Collège de France , Université P. et M. Curie , PSL Research University , 11 Place Marcelin Berthelot , 75231 Paris Cedex 05 , France . ;
| | - Indre Thiel
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog-Weg 1-5 , CH-8093 Zürich , Switzerland
| | - Alexey Fedorov
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog-Weg 1-5 , CH-8093 Zürich , Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog-Weg 1-5 , CH-8093 Zürich , Switzerland
| | - Victor Mougel
- Laboratoire de Chimie des Processus Biologiques , UMR 8229 , CNRS , Collège de France , Université P. et M. Curie , PSL Research University , 11 Place Marcelin Berthelot , 75231 Paris Cedex 05 , France . ;
| | - Marc Fontecave
- Laboratoire de Chimie des Processus Biologiques , UMR 8229 , CNRS , Collège de France , Université P. et M. Curie , PSL Research University , 11 Place Marcelin Berthelot , 75231 Paris Cedex 05 , France . ;
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Copéret C, Liao WC, Gordon CP, Ong TC. Active Sites in Supported Single-Site Catalysts: An NMR Perspective. J Am Chem Soc 2017; 139:10588-10596. [DOI: 10.1021/jacs.6b12981] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Christophe Copéret
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Wei-Chih Liao
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Christopher P. Gordon
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Ta-Chung Ong
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
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