1
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Martínez Q H, Neira JA, Amaya ÁA, Blach V D, Campos CH, Martínez O F. Selective oxidation of glycerol mediated by surface plasmon of gold nanoparticles deposited on titanium dioxide nanowires. CHEMOSPHERE 2024; 364:142995. [PMID: 39097114 DOI: 10.1016/j.chemosphere.2024.142995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 07/23/2024] [Accepted: 07/31/2024] [Indexed: 08/05/2024]
Abstract
This paper describes an alternative method for the in situ synthesis of gold nanoparticles (AuNPs) with a particle size of less than 3 nm, using nanoreactors formed by reverse micelles of 1,4-bis-(2-ethylhexyl) sulfosuccinate sodium (AOT) and nanoparticle stabilization with l-cysteine, which favor the preparation of nanoparticles with size and shape control, which are homogeneously dispersed (1% by weight) on the support of titanium dioxide nanowires (TNWs). To study the activity and selectivity of the prepared catalyst (AuNPs@TNWs), an aqueous solution of 40 mM glycerol was irradiated with a green laser (λ = 530 nm, power = 100 mW) in the presence of the catalyst and O2 as an oxidant at 22 °C for 6 h, obtaining a glycerol conversion of 86% with a selectivity towards hydroxypyruvic acid (HA) of more than 90%. From the control and reactions, we concluded that the Ti-OH groups promote the glycerol adsorption on the nanowires surface and the surface plasmon of the gold nanoparticles favors the selectivity of the reaction towards the hydroxypyruvic acid.
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Affiliation(s)
- Henry Martínez Q
- Centro de Investigaciones en Catálisis-CICAT, Universidad Industrial de Santander, Escuela de Química, Km 2 vía El Refugio, Piedecuesta, Santander, Colombia; Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad de Concepción, Edmundo Larenas 129, Casilla 160-C, Concepción, Chile.
| | - Jane A Neira
- Centro de Investigaciones en Catálisis-CICAT, Universidad Industrial de Santander, Escuela de Química, Km 2 vía El Refugio, Piedecuesta, Santander, Colombia
| | - Álvaro A Amaya
- Universidad de Santander, Facultad de Ciencias Exactas, Naturales y Agropecuarias, Ciencias Básicas y Aplicadas Para la Sostenibilidad - CIBAS, Bucaramanga, Colombia
| | - Diana Blach V
- Centro de Investigaciones en Catálisis-CICAT, Universidad Industrial de Santander, Escuela de Química, Km 2 vía El Refugio, Piedecuesta, Santander, Colombia; Laboratorio de Investigaciones en Postcosecha-LIP, Universidad del Quindío, Facultad de Ciencias Básicas y Tecnologías, Carrera 15 #12N, Armenia, Quindío, Colombia
| | - Cristian H Campos
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad de Concepción, Edmundo Larenas 129, Casilla 160-C, Concepción, Chile
| | - Fernando Martínez O
- Centro de Investigaciones en Catálisis-CICAT, Universidad Industrial de Santander, Escuela de Química, Km 2 vía El Refugio, Piedecuesta, Santander, Colombia.
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2
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Samudrala K, Akram MO, Dutton JL, Martin CD, Conley MP. Formation of Strong Boron Lewis Acid Sites on Silica. Inorg Chem 2024; 63:4939-4946. [PMID: 38451151 PMCID: PMC10951953 DOI: 10.1021/acs.inorgchem.3c04121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/20/2024] [Accepted: 02/21/2024] [Indexed: 03/08/2024]
Abstract
Bis(1-methyl-ortho-carboranyl)borane (HBMeoCb2) is a very strong Lewis acid that reacts with the isolated silanols present on silica partially dehydroxylated at 700 °C (SiO2-700) to form the well-defined Lewis site MeoCb2B(OSi≡) (1) and H2. 11B{1H} magic-angle spinning (MAS) nuclear magnetic resonance (NMR) data of 1 are consistent with that of a three-coordinate boron site. Contacting 1 with O═PEt3 (triethylphosphine oxide TEPO) and measuring 31P{1H} MAS NMR spectra show that 1 preserves the strong Lewis acidity of HBMeoCb2. Hydride ion affinity and fluoride ion affinity calculations using small molecules analogs of 1 also support the strong Lewis acidity of the boron sites in this material. Reactions of 1 with Cp2Hf(13CH3)2 show that the Lewis sites are capable of abstracting methide groups from Hf to form [Cp2Hf-13CH3][H313C-B(MeoCb2)OSi≡], but with a low overall efficiency.
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Affiliation(s)
| | - Manjur O. Akram
- Department
of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798, United States
| | - Jason L. Dutton
- Department
of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Caleb D. Martin
- Department
of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798, United States
| | - Matthew P. Conley
- Department
of Chemistry, University of California, Riverside, California 92521, United States
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3
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Xiao S, Wang L, Qin Z, Chen X, Chen L, Li Y, Shen K. Silanol-Assisted High-Yield Nanofabrication of SnO 2 Single Crystals with Highly Tunable and Ordered Mesoporosity. ACS CENTRAL SCIENCE 2024; 10:374-384. [PMID: 38435532 PMCID: PMC10906242 DOI: 10.1021/acscentsci.3c01374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 01/01/2024] [Accepted: 01/03/2024] [Indexed: 03/05/2024]
Abstract
Highly ordered mesoporous materials with a single-crystalline structure have attracted broad interest due to their wide applications from catalysis to energy conversion/storage, but constructing them with good controllability and high yields remains a highly daunting task. Herein, we construct a new class of three-dimensionally ordered mesoporous SnO2 single crystals (3DOm-SnO2) with well-defined facets and excellent mesopore tunability. Mechanism studies demonstrate that the silanol groups on ordered silica nanospheres (3DO-SiO2) can induce the efficient heterogeneous crystallization of uniform SnO2 single crystals in its periodic voids by following the hard and soft acid and base theory, affording a much higher yield of ∼96% for 3DOm-SnO2 than that of its solid counterpart prepared in the absence of 3DO-SiO2 (∼1.5%). Benefiting from its permanent ordered mesopores and favorable electronic structure, Pd-supported 3DOm-SnO2 can efficiently catalyze the unprecedented sequential hydrogenation of 4-nitrophenylacetylene to produce 4-nitrostyrene, then 4-nitroethylbenzene, and finally 4-aminoethylbenzene. DFT calculations further reveal the favorable synergistic effect between Pd and 3DOm-SnO2 via moderate electron transfer for realizing this sequential hydrogenation reaction. Our work underlines the crucial role of silanol groups in inducing the high-yield heterogeneous crystallization of 3DOm-SnO2, shedding light on the rational design and construction of various 3DO single crystals that are of great practical significance.
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Affiliation(s)
- Shoukang Xiao
- Guangdong
Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry
and Chemical Engineering, South China University
of Technology, Guangzhou, Guangdong 510640, China
| | - Li Wang
- Guangdong
Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry
and Chemical Engineering, South China University
of Technology, Guangzhou, Guangdong 510640, China
| | - Ze Qin
- Guangdong
Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry
and Chemical Engineering, South China University
of Technology, Guangzhou, Guangdong 510640, China
| | - Xiao Chen
- Beijing
Key Laboratory of Green Chemical Reaction Engineering and Technology,
Department of Chemical Engineering, Tsinghua
University, Beijing 100084, China
| | - Liyu Chen
- Guangdong
Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry
and Chemical Engineering, South China University
of Technology, Guangzhou, Guangdong 510640, China
| | - Yingwei Li
- Guangdong
Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry
and Chemical Engineering, South China University
of Technology, Guangzhou, Guangdong 510640, China
| | - Kui Shen
- Guangdong
Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry
and Chemical Engineering, South China University
of Technology, Guangzhou, Guangdong 510640, China
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4
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Chen Z, Zimmerli NK, Zubair M, Yakimov AV, Björgvinsdóttir S, Alaniva N, Willinger E, Barnes AB, Bedford NM, Copéret C, Florian P, Abdala PM, Fedorov A, Müller CR. Nature of GaO x Shells Grown on Silica by Atomic Layer Deposition. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:7475-7490. [PMID: 37780414 PMCID: PMC10536998 DOI: 10.1021/acs.chemmater.3c00923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 08/02/2023] [Indexed: 10/03/2023]
Abstract
Gallia-based shells with a thickness varying from a submonolayer to ca. 2.5 nm were prepared by atomic layer deposition (ALD) using trimethylgallium, ozone, and partially dehydroxylated silica, followed by calcination at 500 °C. Insight into the atomic-scale structure of these shells was obtained by high-field 71Ga solid-state nuclear magnetic resonance (NMR) experiments and the modeling of X-ray differential pair distribution function data, complemented by Ga K-edge X-ray absorption spectroscopy and 29Si dynamic nuclear polarization surface enhanced NMR spectroscopy (DNP SENS) studies. When applying one ALD cycle, the grown submonolayer contains mostly tetracoordinate Ga sites with Si atoms in the second coordination sphere ([4]Ga(Si)) and, according to 15N DNP SENS using pyridine as the probe molecule, both strong Lewis acid sites (LAS) and strong Brønsted acid sites (BAS), consistent with the formation of gallosilicate Ga-O-Si and Ga-μ2-OH-Si species. The shells obtained using five and ten ALD cycles display characteristics of amorphous gallia (GaOx), i.e., an increased relative fraction of pentacoordinate sites ([5]Ga(Ga)), the presence of mild LAS, and a decreased relative abundance of strong BAS. The prepared Ga1-, Ga5-, and Ga10-SiO2-500 materials catalyze the dehydrogenation of isobutane to isobutene, and their catalytic performance correlates with the relative abundance and strength of LAS and BAS, viz., Ga1-SiO2-500, a material with a higher relative fraction of strong LAS, is more active and stable compared to Ga5- and Ga10-SiO2-500. In contrast, related ALD-derived Al1-, Al5-, and Al10-SiO2-500 materials do not catalyze the dehydrogenation of isobutane and this correlates with the lack of strong LAS in these materials that instead feature abundant strong BAS formed via the atomic-scale mixing of Al sites with silica, leading to Al-μ2-OH-Si sites. Our results suggest that [4]Ga(Si) sites provide strong Lewis acidity and drive the dehydrogenation activity, while the appearance of [5]Ga(Ga) sites with mild Lewis activity is associated with catalyst deactivation through coking. Overall, the atomic-level insights into the structure of the GaOx-based materials prepared in this work provide a guide to design active Ga-based catalysts by a rational tailoring of Lewis and Brønsted acidity (nature, strength, and abundance).
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Affiliation(s)
- Zixuan Chen
- Laboratory
of Energy Science and Engineering, ETH Zürich, 8092 Zürich, Switzerland
| | - Nora K. Zimmerli
- Laboratory
of Energy Science and Engineering, ETH Zürich, 8092 Zürich, Switzerland
| | - Muhammad Zubair
- School
of Chemical Engineering, The University
of New South Wales, Sydney, NSW 2052, Australia
| | - Alexander V. Yakimov
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, 8093 Zürich, Switzerland
| | | | - Nicholas Alaniva
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, 8093 Zürich, Switzerland
| | - Elena Willinger
- Laboratory
of Energy Science and Engineering, ETH Zürich, 8092 Zürich, Switzerland
| | - Alexander B. Barnes
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, 8093 Zürich, Switzerland
| | - Nicholas M. Bedford
- School
of Chemical Engineering, The University
of New South Wales, Sydney, NSW 2052, Australia
| | - Christophe Copéret
- Department
of Chemistry and Applied Biosciences, ETH
Zürich, 8093 Zürich, Switzerland
| | - Pierre Florian
- CNRS,
CEMHTI UPR3079, Université d’Orléans, F-45071 Orléans, France
| | - Paula M. Abdala
- Laboratory
of Energy Science and Engineering, ETH Zürich, 8092 Zürich, Switzerland
| | - Alexey Fedorov
- Laboratory
of Energy Science and Engineering, ETH Zürich, 8092 Zürich, Switzerland
| | - Christoph R. Müller
- Laboratory
of Energy Science and Engineering, ETH Zürich, 8092 Zürich, Switzerland
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5
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Samudrala KK, Conley MP. Effects of surface acidity on the structure of organometallics supported on oxide surfaces. Chem Commun (Camb) 2023; 59:4115-4127. [PMID: 36912586 DOI: 10.1039/d3cc00047h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
Well-defined organometallics supported on high surface area oxides are promising heterogeneous catalysts. An important design factor in these materials is how the metal interacts with the functionalities on an oxide support, commonly anionic X-type ligands derived from the reaction of an organometallic M-R with an -OH site on the oxide. The metal can either form a covalent M-O bond or form an electrostatic M+⋯-O ion-pair, which impacts how well-defined organometallics will interact with substrates in catalytic reactions. A less common reaction pathway involves the reaction of a Lewis site on the oxide with the organometallic, resulting in abstraction to form an ion-pair, which is relevant to industrial olefin polymerization catalysts. This Feature Article views the spectrum of reactivity between an organometallic and an oxide through the prism of Brønsted and/or Lewis acidity of surface sites and draws analogies to the molecular frame where Lewis and Brønsted acids are known to form reactive ion-pairs. Applications of the well-defined sites developed in this article are also discussed.
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Affiliation(s)
| | - Matthew P Conley
- Department of Chemistry, University of California, Riverside, California 92521, USA.
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6
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Samudrala KK, Huynh W, Dorn RW, Rossini AJ, Conley MP. Formation of a Strong Heterogeneous Aluminum Lewis Acid on Silica. Angew Chem Int Ed Engl 2022; 61:e202205745. [DOI: 10.1002/anie.202205745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Indexed: 11/10/2022]
Affiliation(s)
| | - Winn Huynh
- Department of Chemistry University of California, Riverside Riverside CA 92521 USA
| | - Rick W. Dorn
- Department of Chemistry Iowa State University Ames IA 50011 USA
- U.S. Department of Energy Ames Laboratory Ames IA 50011 USA
| | - Aaron J. Rossini
- Department of Chemistry Iowa State University Ames IA 50011 USA
- U.S. Department of Energy Ames Laboratory Ames IA 50011 USA
| | - Matthew P. Conley
- Department of Chemistry University of California, Riverside Riverside CA 92521 USA
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7
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Conley M, Samudrala KK, Huynh W, Dorn RW, Rossini AJ. Formation of a Strong Heterogeneous Aluminum Lewis Acid on Silica. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Matthew Conley
- University of California, Riverside Chemistry 501 Big Springs Rd 92521 Riverside UNITED STATES
| | | | - Winn Huynh
- University of California Riverside Chemistry UNITED STATES
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8
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Bekyarova E, Conley MP. The coordination chemistry of oxide and nanocarbon materials. Dalton Trans 2022; 51:8557-8570. [PMID: 35586978 DOI: 10.1039/d2dt00459c] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Understanding how a ligand affects the steric and electronic properties of a metal is the cornerstone of the inorganic chemistry enterprise. What happens when the ligand is an extended surface? This question is central to the design and implementation of state-of-the-art functional materials containing transition metals. This perspective will describe how these two very different sets of extended surfaces can form well-defined coordination complexes with metals. In the Green formalism, functionalities on oxide surfaces react with inorganics to form species that contain X-type or LX-type interactions between the metal and the oxide. Carbon surfaces are neutral L-type ligands; this perspective focuses on carbons that donate six electrons to a metal. The nature of this interaction depends on the curvature, and thereby orbital overlap, between the metal and the extended π-system from the nanocarbon.
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Affiliation(s)
- Elena Bekyarova
- Department of Chemistry, University of California, Riverside, California 92521, USA.
| | - Matthew P Conley
- Department of Chemistry, University of California, Riverside, California 92521, USA.
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9
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Bistafa C, Surblys D, Kusudo H, Yamaguchi Y. Water on hydroxylated silica surfaces: Work of adhesion, interfacial entropy, and droplet wetting. J Chem Phys 2021; 155:064703. [PMID: 34391348 DOI: 10.1063/5.0056718] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In the last few years, much attention has been devoted to the control of the wettability properties of surfaces modified with functional groups. Molecular dynamics (MD) simulation is one of the powerful tools for microscopic analysis providing visual images and mean geometrical shapes of the contact line, e.g., of nanoscale droplets on solid surfaces, while profound understanding of wetting demands quantitative evaluation of the solid-liquid (SL) interfacial tension. In the present work, we examined the wetting of water on neutral and regular hydroxylated silica surfaces with five different area densities of OH groups ρA OH, ranging from a non-hydroxylated surface to a fully hydroxylated one through two theoretical methods: thermodynamic integration (TI) and MD simulations of quasi-two-dimensional equilibrium droplets. For the former, the work of adhesion needed to quasi-statically strip the water film off the solid surface was computed by the phantom wall TI scheme to evaluate the SL interfacial free energy, whereas for the latter, the apparent contact angle θapp was calculated from the droplet density distribution. The theoretical contact angle θYD and the apparent one θapp, both indicating the enhancement of wettability by an increase in ρA OH, presented good quantitative agreement, especially for non-hydroxylated and highly hydroxylated surfaces. On partially hydroxylated surfaces, in which θYD and θapp slightly deviated, the Brownian motion of the droplet was suppressed, possibly due to the pinning of the contact line around the hydroxyl groups. Relations between work of adhesion, interfacial energy, and entropy loss were also analyzed, and their influence on the wettability was discussed.
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Affiliation(s)
- Carlos Bistafa
- Department of Mechanical Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
| | - Donatas Surblys
- Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Hiroki Kusudo
- Department of Mechanical Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
| | - Yasutaka Yamaguchi
- Department of Mechanical Engineering, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan
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10
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Olefin oligomerization by main group Ga 3+ and Zn 2+ single site catalysts on SiO 2. Nat Commun 2021; 12:2322. [PMID: 33875664 PMCID: PMC8055657 DOI: 10.1038/s41467-021-22512-6] [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] [Received: 10/19/2020] [Accepted: 03/08/2021] [Indexed: 11/08/2022] Open
Abstract
In heterogeneous catalysis, olefin oligomerization is typically performed on immobilized transition metal ions, such as Ni2+ and Cr3+. Here we report that silica-supported, single site catalysts containing immobilized, main group Zn2+ and Ga3+ ion sites catalyze ethylene and propylene oligomerization to an equilibrium distribution of linear olefins with rates similar to that of Ni2+. The molecular weight distribution of products formed on Zn2+ is similar to Ni2+, while Ga3+ forms higher molecular weight olefins. In situ spectroscopic and computational studies suggest that oligomerization unexpectedly occurs by the Cossee-Arlman mechanism via metal hydride and metal alkyl intermediates formed during olefin insertion and β-hydride elimination elementary steps. Initiation of the catalytic cycle is proposed to occur by heterolytic C-H dissociation of ethylene, which occurs at about 250 °C where oligomerization is catalytically relevant. This work illuminates new chemistry for main group metal catalysts with potential for development of new oligomerization processes.
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11
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Khan SA, Vandervelden CA, Scott SL, Peters B. Grafting metal complexes onto amorphous supports: from elementary steps to catalyst site populationsviakernel regression. REACT CHEM ENG 2020. [DOI: 10.1039/c9re00357f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We use transition state theory, kernel regression, and population balance modeling techniques to model the grafting of metal complexes onto amorphous catalyst supports.
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Affiliation(s)
- Salman A. Khan
- Department of Chemical Engineering
- University of California
- Santa Barbara
- USA
| | | | - Susannah L. Scott
- Department of Chemical Engineering
- University of California
- Santa Barbara
- USA
- Department of Chemistry & Biochemistry
| | - Baron Peters
- Department of Chemical & Biomolecular Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
- Department of Chemistry
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12
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Nauert SL, Rosen AS, Kim H, Snurr RQ, Stair PC, Notestein JM. Evidence for Copper Dimers in Low-Loaded CuOx/SiO2 Catalysts for Cyclohexane Oxidative Dehydrogenation. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02532] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Scott L. Nauert
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Andrew S. Rosen
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Hacksung Kim
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
- Department of Chemistry, Center for Catalysis and Surface Science, and Institute for Catalysis in Energy Processes, Northwestern University, Evanston, Illinois 60208, United States
| | - Randall Q. Snurr
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Peter C. Stair
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
- Department of Chemistry, Center for Catalysis and Surface Science, and Institute for Catalysis in Energy Processes, Northwestern University, Evanston, Illinois 60208, United States
| | - Justin M. Notestein
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
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13
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Szeto KC, Jones ZR, Merle N, Rios C, Gallo A, Le Quemener F, Delevoye L, Gauvin RM, Scott SL, Taoufik M. A Strong Support Effect in Selective Propane Dehydrogenation Catalyzed by Ga(i-Bu)3 Grafted onto γ-Alumina and Silica. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00936] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kai C. Szeto
- C2P2 (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex, France
| | - Zachary R. Jones
- Department of Chemistry and Biochemistry, University of California, Santa Barbara 93106-9510 United States
| | - Nicolas Merle
- Université
Lille, CNRS, Centrale Lille, ENSCL, Université Artois, UMR
8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - César Rios
- C2P2 (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex, France
| | - Alessandro Gallo
- Department of Chemical Engineering, University of California, Santa Barbara 93106-5080 United States
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Frederic Le Quemener
- C2P2 (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex, France
| | - Laurent Delevoye
- Université
Lille, CNRS, Centrale Lille, ENSCL, Université Artois, UMR
8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Régis M. Gauvin
- Université
Lille, CNRS, Centrale Lille, ENSCL, Université Artois, UMR
8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Susannah L. Scott
- Department of Chemistry and Biochemistry, University of California, Santa Barbara 93106-9510 United States
- Department of Chemical Engineering, University of California, Santa Barbara 93106-5080 United States
| | - Mostafa Taoufik
- C2P2 (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex, France
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14
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Phadke NM, Van der Mynsbrugge J, Mansoor E, Getsoian AB, Head-Gordon M, Bell AT. Characterization of Isolated Ga3+ Cations in Ga/H-MFI Prepared by Vapor-Phase Exchange of H-MFI Zeolite with GaCl3. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01254] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Neelay M. Phadke
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Jeroen Van der Mynsbrugge
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Erum Mansoor
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Andrew Bean Getsoian
- Chemical Engineering Department, Ford Motor Company, Dearborn, Michigan 48121, United States
| | - Martin Head-Gordon
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Alexis T. Bell
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
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15
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Camacho-Bunquin J, Ferrandon M, Sohn H, Yang D, Liu C, Ignacio-de Leon PA, Perras FA, Pruski M, Stair PC, Delferro M. Chemoselective Hydrogenation with Supported Organoplatinum(IV) Catalyst on Zn(II)-Modified Silica. J Am Chem Soc 2018; 140:3940-3951. [PMID: 29485277 DOI: 10.1021/jacs.7b11981] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Well-defined organoplatinum(IV) sites were grafted on a Zn(II)-modified SiO2 support via surface organometallic chemistry in toluene at room temperature. Solid-state spectroscopies including XAS, DRIFTS, DRUV-vis, and solid-state (SS) NMR enhanced by dynamic nuclear polarization (DNP), as well as TPR-H2 and TEM techniques revealed highly dispersed (methylcyclopentadienyl)methylplatinum(IV) sites on the surface ((MeCp)PtMe/Zn/SiO2, 1). In addition, computational modeling suggests that the surface reaction of (MeCp)PtMe3 with Zn(II)-modified SiO2 support is thermodynamically favorable (Δ G = -12.4 kcal/mol), likely due to the increased acidity of the hydroxyl group, as indicated by NH3-TPD and DNP-enhanced 17O{1H} SSNMR. In situ DRIFTS and XAS hydrogenation experiments reveal the probable formation of a surface Pt(IV)-H upon hydrogenolysis of Pt-Me groups. The heterogenized organoplatinum(IV)-hydride sites catalyze the selective partial hydrogenation of 1,3-butadiene to butenes (up to 95%) and the reduction of nitrobenzene derivatives to anilines (up to 99%) with excellent tolerance of reduction-sensitive functional groups (olefin, carbonyl, nitrile, halogens) under mild reaction conditions.
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Affiliation(s)
- Jeffrey Camacho-Bunquin
- Chemical Sciences and Engineering Division , Argonne National Laboratory , 9700 S Cass Avenue , Lemont , Illinois 60439 , United States
| | - Magali Ferrandon
- Chemical Sciences and Engineering Division , Argonne National Laboratory , 9700 S Cass Avenue , Lemont , Illinois 60439 , United States
| | - Hyuntae Sohn
- Chemical Sciences and Engineering Division , Argonne National Laboratory , 9700 S Cass Avenue , Lemont , Illinois 60439 , United States
| | - Dali Yang
- Chemical Sciences and Engineering Division , Argonne National Laboratory , 9700 S Cass Avenue , Lemont , Illinois 60439 , United States
| | - Cong Liu
- Chemical Sciences and Engineering Division , Argonne National Laboratory , 9700 S Cass Avenue , Lemont , Illinois 60439 , United States
| | - Patricia Anne Ignacio-de Leon
- Energy Sciences Division , Argonne National Laboratory , 9700 S Cass Avenue , Lemont , Illinois 60439 , United States
| | - Frédéric A Perras
- Ames Laboratory, U.S. Department of Energy , Ames , Iowa 50010 , United States
| | - Marek Pruski
- Ames Laboratory, U.S. Department of Energy , Ames , Iowa 50010 , United States.,Department of Chemistry , Iowa State University , 2416 Pammel Drive , Ames , Iowa 50011 , United States
| | - Peter C Stair
- Chemical Sciences and Engineering Division , Argonne National Laboratory , 9700 S Cass Avenue , Lemont , Illinois 60439 , United States.,Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Massimiliano Delferro
- Chemical Sciences and Engineering Division , Argonne National Laboratory , 9700 S Cass Avenue , Lemont , Illinois 60439 , United States
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16
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Abstract
An in-depth knowledge of the interaction of water with amorphous silica is critical to fundamental studies of interfacial hydration water, as well as to industrial processes such as catalysis, nanofabrication, and chromatography. Silica has a tunable surface comprising hydrophilic silanol groups and moderately hydrophobic siloxane groups that can be interchanged through thermal and chemical treatments. Despite extensive studies of silica surfaces, the influence of surface hydrophilicity and chemical topology on the molecular properties of interfacial water is not well understood. In this work, we controllably altered the surface silanol density, and measured surface water diffusivity using Overhauser dynamic nuclear polarization (ODNP) and complementary silica-silica interaction forces across water using a surface forces apparatus (SFA). The results show that increased silanol density generally leads to slower water diffusivity and stronger silica-silica repulsion at short aqueous separations (less than ∼4 nm). Both techniques show sharp changes in hydration properties at intermediate silanol densities (2.0-2.9 nm-2). Molecular dynamics simulations of model silica-water interfaces corroborate the increase in water diffusivity with silanol density, and furthermore show that even on a smooth and crystalline surface at a fixed silanol density, adjusting the spatial distribution of silanols results in a range of surface water diffusivities spanning ∼10%. We speculate that a critical silanol cluster size or connectivity parameter could explain the sharp transition in our results, and can modulate wettability, colloidal interactions, and surface reactions, and thus is a phenomenon worth further investigation on silica and chemically heterogeneous surfaces.
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17
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Goldsmith BR, Peters B, Johnson JK, Gates BC, Scott SL. Beyond Ordered Materials: Understanding Catalytic Sites on Amorphous Solids. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01767] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bryan R. Goldsmith
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
- Department
of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48105, United States
| | - Baron Peters
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - J. Karl Johnson
- Department
of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Bruce C. Gates
- Department
of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Susannah L. Scott
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
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18
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Searles K, Siddiqi G, Safonova OV, Copéret C. Silica-supported isolated gallium sites as highly active, selective and stable propane dehydrogenation catalysts. Chem Sci 2017; 8:2661-2666. [PMID: 28553501 PMCID: PMC5433511 DOI: 10.1039/c6sc05178b] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 12/28/2016] [Indexed: 01/06/2023] Open
Abstract
Single-site gallium centers on the surface of silica are prepared via grafting of [Ga(OSi(OtBu)3)3(THF)] on SiO2-700 followed by a thermolysis step. The resulting surface species corresponds to well-defined tetra-coordinate gallium single-sites, [([triple bond, length as m-dash]SiO)3Ga(XOSi[triple bond, length as m-dash])] (X = -H or [triple bond, length as m-dash]Si) according to IR, X-ray absorption near-edge structure and extended X-ray absorption fine structure analysis. These gallium sites show high activity, selectivity and stability for propane dehydrogenation with an initial turnover frequency of 20 per h per gallium center, propylene selectivity of ≥93% and remarkable stability over 20 h. The stability of the catalyst probably results from site-isolation of the active site on a non-reducible support such as silica, diminishing facile reduction typical of Ga2O3-based catalysts.
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Affiliation(s)
- Keith Searles
- Department of Chemistry and Applied Biosciences , ETH Zürich , CH-8093 Zürich , Switzerland .
| | - Georges Siddiqi
- Department of Chemistry and Applied Biosciences , ETH Zürich , CH-8093 Zürich , Switzerland .
| | | | - Christophe Copéret
- Department of Chemistry and Applied Biosciences , ETH Zürich , CH-8093 Zürich , Switzerland .
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19
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Gould NS, Xu B. Effect of liquid water on acid sites of NaY: An in situ liquid phase spectroscopic study. J Catal 2016. [DOI: 10.1016/j.jcat.2016.08.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Copéret C, Comas-Vives A, Conley MP, Estes DP, Fedorov A, Mougel V, Nagae H, Núñez-Zarur F, Zhizhko PA. Surface Organometallic and Coordination Chemistry toward Single-Site Heterogeneous Catalysts: Strategies, Methods, Structures, and Activities. Chem Rev 2016; 116:323-421. [PMID: 26741024 DOI: 10.1021/acs.chemrev.5b00373] [Citation(s) in RCA: 490] [Impact Index Per Article: 61.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Matthew P Conley
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Deven P Estes
- 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
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Haruki Nagae
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland.,Department of Chemistry, Graduate School of Engineering Science, Osaka University, CREST , Toyonaka, Osaka 560-8531, Japan
| | - Francisco Núñez-Zarur
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Pavel A Zhizhko
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland.,A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , Vavilov str. 28, 119991 Moscow, Russia
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21
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Werghi B, Bendjeriou-Sedjerari A, Sofack-Kreutzer J, Jedidi A, Abou-Hamad E, Cavallo L, Basset JM. Well-defined silica supported aluminum hydride: another step towards the utopian single site dream? Chem Sci 2015; 6:5456-5465. [PMID: 28757945 PMCID: PMC5505125 DOI: 10.1039/c5sc02276b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 07/17/2015] [Indexed: 11/27/2022] Open
Abstract
Reaction of triisobutylaluminum with SBA15700 at room temperature occurs by two parallel pathways involving either silanol or siloxane bridges.
Reaction of triisobutylaluminum with SBA15700 at room temperature occurs by two parallel pathways involving either silanol or siloxane bridges. It leads to the formation of a well-defined bipodal [(
Created by potrace 1.16, written by Peter Selinger 2001-2019
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SiO)2Al–CH2CH(CH3)2] 1a, silicon isobutyl [Si–CH2CH(CH3)2] 1b and a silicon hydride [Si–H] 1c. Their structural identity was characterized by FT-IR and advanced solid-state NMR spectroscopies (1H, 13C, 29Si, 27Al and 2D multiple quantum), elemental and gas phase analysis, and DFT calculations. The reaction involves the formation of a highly reactive monopodal intermediate: [SiO–Al–[CH2CH(CH3)2]2], with evolution of isobutane. This intermediate undergoes two parallel routes: transfer of either one isobutyl fragment or of one hydride to an adjacent silicon atom. Both processes occur by opening of a strained siloxane bridge, Si–O–Si but with two different mechanisms, showing that the reality of “single site” catalyst may be an utopia: DFT calculations indicate that isobutyl transfer occurs via a simple metathesis between the Al-isobutyl and O–Si bonds, while hydride transfer occurs via a two steps mechanism, the first one is a β-H elimination to Al with elimination of isobutene, whereas the second is a metathesis step between the formed Al–H bond and a O–Si bond. Thermal treatment of 1a (at 250 °C) under high vacuum (10–5 mbar) generates Al–H through a β-H elimination of isobutyl fragment. These supported well-defined Al–H which are highly stable with time, are tetra, penta and octa coordinated as demonstrated by IR and 27Al–1H J-HMQC NMR spectroscopy. All these observations indicate that surfaces atoms around the site of grafting play a considerable role in the reactivity of a single site system.
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Affiliation(s)
- Baraa Werghi
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Anissa Bendjeriou-Sedjerari
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Julien Sofack-Kreutzer
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Abdesslem Jedidi
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Edy Abou-Hamad
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Luigi Cavallo
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Jean-Marie Basset
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
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22
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Xu W, Yu B, Sun H, Yang J, Zhang Y, Wang Z, Chen X, Zhang G, Gao Z. The first montmorillonite-supported surface single-structure titanium complex: synthesis, characterization and catalytic activity in alkene epoxidation. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wei Xu
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE/School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 China
| | - Bo Yu
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE/School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 China
| | - Huaming Sun
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE/School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 China
| | - Jindou Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE/School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 China
| | - Ying Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE/School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 China
| | - Zhenhua Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE/School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 China
| | - Xi Chen
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE/School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 China
| | - Guofang Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE/School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, MOE/School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 China
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23
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Samantaray MK, Callens E, Abou-Hamad E, Rossini AJ, Widdifield CM, Dey R, Emsley L, Basset JM. WMe6 Tamed by Silica: ≡Si–O–WMe5 as an Efficient, Well-Defined Species for Alkane Metathesis, Leading to the Observation of a Supported W–Methyl/Methylidyne Species. J Am Chem Soc 2014; 136:1054-61. [DOI: 10.1021/ja410747g] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Manoja K. Samantaray
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Emmanuel Callens
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Edy Abou-Hamad
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Aaron J. Rossini
- Institut de Sciences Analytiques (CNRS, ENS-Lyon,
UCB Lyon 1), Université de Lyon, Centre de RMN à Très Hauts Champs, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Cory M. Widdifield
- Institut de Sciences Analytiques (CNRS, ENS-Lyon,
UCB Lyon 1), Université de Lyon, Centre de RMN à Très Hauts Champs, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Raju Dey
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Lyndon Emsley
- Institut de Sciences Analytiques (CNRS, ENS-Lyon,
UCB Lyon 1), Université de Lyon, Centre de RMN à Très Hauts Champs, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Jean-Marie Basset
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
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24
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Chen Y, Zheng B, Abou-Hamad E, Hamieh A, Hamzaoui B, Huang KW, Basset JM. The use of a well-defined surface organometallic complex as a probe molecule: [(SiO)TaVCl2Me2] shows different isolated silanol sites on the silica surface. Chem Commun (Camb) 2014; 50:11721-3. [DOI: 10.1039/c4cc04277h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
TaVCl2Me3 reacts with silica(700) and produces two different surface organometallic species, the heterogeneity of the silica surface was disclosed and studied with experimental and theoretical approach.
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Affiliation(s)
- Yin Chen
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center
- Thuwal 23955-6900, Saudi Arabia
| | - Bin Zheng
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center
- Thuwal 23955-6900, Saudi Arabia
| | - Edy Abou-Hamad
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center
- Thuwal 23955-6900, Saudi Arabia
| | - Ali Hamieh
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center
- Thuwal 23955-6900, Saudi Arabia
| | - Bilel Hamzaoui
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center
- Thuwal 23955-6900, Saudi Arabia
| | - Kuo-wei Huang
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center
- Thuwal 23955-6900, Saudi Arabia
| | - Jean-marie Basset
- King Abdullah University of Science and Technology (KAUST)
- KAUST Catalysis Center
- Thuwal 23955-6900, Saudi Arabia
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25
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Kung MC, Riofski MV, Missaghi MN, Kung HH. Organosilicon platforms: bridging homogeneous, heterogeneous, and bioinspired catalysis. Chem Commun (Camb) 2014; 50:3262-76. [DOI: 10.1039/c3cc48766k] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organosilicon compounds form versatile structures such as cubic metallasiloxanes, cage-like silsesquioxanes, macromolecular nanocages, and flexible dendrimers and linear metallasiloxanes, and are useful as catalysts, ligands for metal complexes, and catalyst supports.
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Affiliation(s)
- Mayfair C. Kung
- Department of Chemical and Biological Engineering
- Northwestern University
- Evanston, USA
| | - Mark V. Riofski
- Department of Chemical and Biological Engineering
- Northwestern University
- Evanston, USA
| | - Michael N. Missaghi
- Department of Chemical and Biological Engineering
- Northwestern University
- Evanston, USA
| | - Harold H. Kung
- Department of Chemical and Biological Engineering
- Northwestern University
- Evanston, USA
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26
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Rimola A, Costa D, Sodupe M, Lambert JF, Ugliengo P. Silica surface features and their role in the adsorption of biomolecules: computational modeling and experiments. Chem Rev 2013; 113:4216-313. [PMID: 23289428 DOI: 10.1021/cr3003054] [Citation(s) in RCA: 328] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Albert Rimola
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra (Cerdanyola del Vallès), Spain
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27
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28
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Mania P, Verel R, Jenny F, Hammond C, Hermans I. Thermal Restructuring of Silica-Grafted TiClxSpecies and Consequences for Epoxidation Catalysis. Chemistry 2013; 19:9849-58. [DOI: 10.1002/chem.201300842] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Indexed: 11/05/2022]
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29
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Catalytic consequences of open and closed grafted Al(III)-calix[4]arene complexes for hydride and oxo transfer reactions. Proc Natl Acad Sci U S A 2013; 110:2484-9. [PMID: 23359705 DOI: 10.1073/pnas.1211158110] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
An approach for the control and understanding of supported molecular catalysts is demonstrated with the design and synthesis of open and closed variants of a grafted Lewis acid active site, consisting of Al(III)-calix[4]arene complexes on the surface of silica. The calixarene acts as a molecular template that enforces open and closed resting-state coordination geometries surrounding the metal active sites, due to its lower-rim substituents as well as site isolation by virtue of its steric bulk. These sites are characterized and used to elucidate mechanistic details and connectivity requirements for reactions involving hydride and oxo transfer. The consequence of controlling open versus closed configurations of the grafted Lewis acid site is demonstrated by the complete lack of observed activity of the closed site for Meerwein-Ponndorf-Verley (MPV) reduction; whereas, the open variant of this catalyst has an MPV reduction activity that is virtually identical to previously reported soluble molecular Al(III)-calix[4]arene catalysts. In contrast, for olefin epoxidation using tert-butyl-hydroperoxide as oxidant, the open and closed catalysts exhibit similar activity. This observation suggests that for olefin epoxidation catalysis using Lewis acids as catalyst and organic hydroperoxide as oxidant, covalent binding of the hydroperoxide is not required, and instead dative coordination to the Lewis acid center is sufficient for catalytic oxo transfer. This latter result is supported by density functional theory calculations of the transition state for olefin epoxidation catalysis, using molecular analogs of the open and closed catalysts.
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30
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Popoff N, Espinas J, Pelletier J, Macqueron B, Szeto KC, Boyron O, Boisson C, Del Rosal I, Maron L, De Mallmann A, Gauvin RM, Taoufik M. Small Changes Have Consequences: Lessons from Tetrabenzyltitanium and -zirconium Surface Organometallic Chemistry. Chemistry 2012. [DOI: 10.1002/chem.201202737] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Liang Y, Erichsen ES, Song C, Anwander R. Organozinc- and Imidazole-Modified Periodic Mesoporous Organosilicas by Means of Molecular Grafting. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200820] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Zhong L, Lee MY, Liu Z, Wanglee YJ, Liu B, Scott SL. Spectroscopic and structural characterization of Cr(II)/SiO2 active site precursors in model Phillips polymerization catalysts. J Catal 2012. [DOI: 10.1016/j.jcat.2012.05.014] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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33
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Merle N, Trébosc J, Baudouin A, Rosal ID, Maron L, Szeto K, Genelot M, Mortreux A, Taoufik M, Delevoye L, Gauvin RM. 17O NMR Gives Unprecedented Insights into the Structure of Supported Catalysts and Their Interaction with the Silica Carrier. J Am Chem Soc 2012; 134:9263-75. [DOI: 10.1021/ja301085m] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Nicolas Merle
- Laboratoire de Chimie Organométallique
de Surface (C2P2-UMR 5265
CNRS/UCBL/ICL) ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616
Villeurbanne Cedex, France
| | - Julien Trébosc
- Université Lille Nord de France, CNRS UMR8181, Unité de
Catalyse et de Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq,
France
| | - Anne Baudouin
- Laboratoire de Chimie Organométallique
de Surface (C2P2-UMR 5265
CNRS/UCBL/ICL) ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616
Villeurbanne Cedex, France
| | - Iker Del Rosal
- Université de Toulouse, INSA, UPS, CNRS-UMR5215, LPCNO, 135 avenue
de Rangueil, 31077 Toulouse, France
| | - Laurent Maron
- Université de Toulouse, INSA, UPS, CNRS-UMR5215, LPCNO, 135 avenue
de Rangueil, 31077 Toulouse, France
| | - Kai Szeto
- Laboratoire de Chimie Organométallique
de Surface (C2P2-UMR 5265
CNRS/UCBL/ICL) ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616
Villeurbanne Cedex, France
| | - Marie Genelot
- Université Lille Nord de France, CNRS UMR8181, Unité de
Catalyse et de Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq,
France
| | - André Mortreux
- Université Lille Nord de France, CNRS UMR8181, Unité de
Catalyse et de Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq,
France
| | - Mostafa Taoufik
- Laboratoire de Chimie Organométallique
de Surface (C2P2-UMR 5265
CNRS/UCBL/ICL) ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, F-69616
Villeurbanne Cedex, France
| | - Laurent Delevoye
- Université Lille Nord de France, CNRS UMR8181, Unité de
Catalyse et de Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq,
France
| | - Régis M. Gauvin
- Université Lille Nord de France, CNRS UMR8181, Unité de
Catalyse et de Chimie du Solide, UCCS USTL, F-59655 Villeneuve d’Ascq,
France
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Kerber RN, Kermagoret A, Callens E, Florian P, Massiot D, Lesage A, Copéret C, Delbecq F, Rozanska X, Sautet P. Nature and structure of aluminum surface sites grafted on silica from a combination of high-field aluminum-27 solid-state NMR spectroscopy and first-principles calculations. J Am Chem Soc 2012; 134:6767-75. [PMID: 22440230 DOI: 10.1021/ja3008566] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The determination of the nature and structure of surface sites after chemical modification of large surface area oxides such as silica is a key point for many applications and challenging from a spectroscopic point of view. This has been, for instance, a long-standing problem for silica reacted with alkylaluminum compounds, a system typically studied as a model for a supported methylaluminoxane and aluminum cocatalyst. While (27)Al solid-state NMR spectroscopy would be a method of choice, it has been difficult to apply this technique because of large quadrupolar broadenings. Here, from a combined use of the highest stable field NMR instruments (17.6, 20.0, and 23.5 T) and ultrafast magic angle spinning (>60 kHz), high-quality spectra were obtained, allowing isotropic chemical shifts, quadrupolar couplings, and asymmetric parameters to be extracted. Combined with first-principles calculations, these NMR signatures were then assigned to actual structures of surface aluminum sites. For silica (here SBA-15) reacted with triethylaluminum, the surface sites are in fact mainly dinuclear Al species, grafted on the silica surface via either two terminal or two bridging siloxy ligands. Tetrahedral sites, resulting from the incorporation of Al inside the silica matrix, are also seen as minor species. No evidence for putative tri-coordinated Al atoms has been found.
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Affiliation(s)
- Rachel Nathaniel Kerber
- Université de Lyon, CNRS, Institut de Chimie de Lyon, Ecole Normale Supérieure de Lyon, 46 allée d'Italie, F-69364 Lyon Cedex 07, France
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Luts T, Katz A. Chemisorption and Dehydration of Ethanol on Silica: Effect of Temperature on Selectivity. Top Catal 2012. [DOI: 10.1007/s11244-012-9771-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Wanglee YJ, Hu J, White RE, Lee MY, Stewart SM, Perrotin P, Scott SL. Borane-Induced Dehydration of Silica and the Ensuing Water-Catalyzed Grafting of B(C6F5)3 To Give a Supported, Single-Site Lewis Acid, ≡SiOB(C6F5)2. J Am Chem Soc 2011; 134:355-66. [DOI: 10.1021/ja207838j] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ying-Jen Wanglee
- Department of Chemistry & Biochemistry, ‡Materials Research Laboratory, and §Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Jerry Hu
- Department of Chemistry & Biochemistry, ‡Materials Research Laboratory, and §Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Rosemary E. White
- Department of Chemistry & Biochemistry, ‡Materials Research Laboratory, and §Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Ming-Yung Lee
- Department of Chemistry & Biochemistry, ‡Materials Research Laboratory, and §Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - S. Michael Stewart
- Department of Chemistry & Biochemistry, ‡Materials Research Laboratory, and §Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Philippe Perrotin
- Department of Chemistry & Biochemistry, ‡Materials Research Laboratory, and §Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Susannah L. Scott
- Department of Chemistry & Biochemistry, ‡Materials Research Laboratory, and §Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
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Gajan D, Copéret C. Silica-supported single-site catalysts: to be or not to be? A conjecture on silica surfaces. NEW J CHEM 2011. [DOI: 10.1039/c1nj20506d] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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