1
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Yue YN, Wang ZL, Yang LR, Zhao YJ, Wang H, Lu JX. L-cysteine-functionalized CuPt: A chiral electrode for the asymmetric electroreduction of aromatic ketones. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.137926] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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2
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Regular arrangement of Pt nanoparticles on S-layer proteins isolated from Lactobacillus kefiri: synthesis and catalytic application. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2018.12.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3
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Stoian I–A, Iacob BC, Prates Ramalho JP, Marian IO, Chiș V, Bodoki E, Oprean R. A chiral electrochemical system based on l-cysteine modified gold nanoparticles for propranolol enantiodiscrimination: Electroanalysis and computational modelling. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134961] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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4
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Meemken F, Rodríguez-García L. Revealing Catalytically Relevant Surface Species by Kinetic Isotope Effect Spectroscopy: H-Bonding to Ester Carbonyl of trans-Ethyl Pyruvate Controls Enantioselectivity on a Cinchona-Modified Pt Catalyst. J Phys Chem Lett 2018; 9:996-1001. [PMID: 29420894 DOI: 10.1021/acs.jpclett.7b03360] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Monitoring active surface species on an operating technical catalyst is a challenging task due to the presence of multiple different adsorption sites and the abundance of bulk species. In this work, kinetic isotope effect (KIE) spectroscopy is introduced to capture the signals of catalytically relevant hydrogenation species from the IR spectroscopic detection in attenuated total reflection mode. The catalytic interface formed between a cinchona-modified Pt/Al2O3 catalyst and the solvent toluene is sensitively probed directly at the rate limiting step(s) during the asymmetric hydrogenation of ethyl pyruvate by measuring the effects of substituting H2 by D2 kinetically and spectroscopically in the same operando experiment. The application of KIE spectroscopy provides unprecedented molecular level insight into the structure of the diastereomeric intermediate surface complex and the phenomenon rate enhancement, which revolutionizes our understanding of chirally modified metal catalysts.
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Affiliation(s)
- Fabian Meemken
- Department of Chemistry and Applied Biosciences, Institute of Chemical and Biomolecular Engineering , ETH Zürich, Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland
| | - Laura Rodríguez-García
- Department of Chemistry and Applied Biosciences, Institute of Chemical and Biomolecular Engineering , ETH Zürich, Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland
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5
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Engineering Surface Ligands of Noble Metal Nanocatalysts in Tuning the Product Selectivity. Catalysts 2017. [DOI: 10.3390/catal7020044] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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6
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Shaping the selectivity in heterogeneous hydrogenation by using molecular modification strategies: Experiment and theory. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.05.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Tamura M, Kishi R, Nakagawa Y, Tomishige K. Self-assembled hybrid metal oxide base catalysts prepared by simply mixing with organic modifiers. Nat Commun 2015; 6:8580. [PMID: 26436638 PMCID: PMC4600743 DOI: 10.1038/ncomms9580] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Accepted: 09/08/2015] [Indexed: 11/09/2022] Open
Abstract
Multidentate materials formed by simply mixing heterogeneous and homogeneous
components are promising for construction of versatile active sites on the surface
of heterogeneous compounds, however, to the best of our knowledge, there are no
reports on such materials. Self-assembly of hetero-hybrid catalytic materials occurs
when heterogeneous catalysts having adjacent Lewis acid-Lewis base sites are mixed
with an organic modifier that contains at least two Lewis base functional groups.
Here we demonstrate the strategy by combining cerium oxide and 2-cyanopyridine that
self-assembles to form a charge-transfer complex in methanol that exhibits a
2,000-fold increase in reaction rate for hydromethoxylation of acrylonitrile with
high selectivity compared with cerium oxide or 2-cyanopyridine alone. The catalytic
system is applied to the transesterification and Knoevenagel condensation affording
14-fold and 11-fold higher activity, respectively, than cerium oxide alone. These
results demonstrate the potential versatility of the catalytic system and the
generality of the catalyst preparation strategy. Self-assembled heterogeneous/homogeneous hybrid materials may offer
ease of preparation and tunable catalytic performance. Here, the authors report the
accelerated selective hydromethoxylation of acrylonitrile in the presence of
CeO2 and 2-cyanopyridine, resulting from the proposed supramolecular
complex.
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Affiliation(s)
- Masazumi Tamura
- Graduate School of Engineering, Tohoku University, Aoba 6-6-07, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - Ryota Kishi
- Graduate School of Engineering, Tohoku University, Aoba 6-6-07, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - Yoshinao Nakagawa
- Graduate School of Engineering, Tohoku University, Aoba 6-6-07, Aramaki, Aoba-ku, Sendai 980-8579, Japan
| | - Keiichi Tomishige
- Graduate School of Engineering, Tohoku University, Aoba 6-6-07, Aramaki, Aoba-ku, Sendai 980-8579, Japan
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8
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Zhang Y, Zhang C, Zhang D, Ma M, Wang W, Chen Q. Nano-assemblies consisting of Pd/Pt nanodendrites and poly (diallyldimethylammonium chloride)-coated reduced graphene oxide on glassy carbon electrode for hydrogen peroxide sensors. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 58:1246-54. [PMID: 26478428 DOI: 10.1016/j.msec.2015.09.015] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 08/12/2015] [Accepted: 09/02/2015] [Indexed: 01/04/2023]
Abstract
Non-enzymatic hydrogen peroxide (H2O2) sensors were fabricated on the basis of glassy carbon (GC) electrode modified with palladium (Pd) core-platinum (Pt) nanodendrites (Pt-NDs) and poly (diallyldimethylammonium chloride) (PDDA)-coated reduced graphene oxide (rGO). A facile wet-chemical method was developed for preparing Pd core-Pt nanodendrites. In this approach, the growth of Pt NDs was directed by Pd nanocrystal which could be regarded as seed. The PDDA-coated rGO could form uniform film on the surface of GC electrode, which provided a support for Pd core- Pt NDs adsorption by self-assembly. The morphologies of the nanocomposites were characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction (spectrum). Electrocatalytic ability of the nanocomposites was evaluated by cyclic voltammetry and chronoamperometric methods. The sensor fabricated by Pd core-Pt NDs/PDDA-rGO/GCE exhibited high sensitivity (672.753 μA mM(-1) cm(-2)), low detection limit (0.027 μM), wider linear range (0.005-0.5mM) and rapid response time (within 5s). Besides, it also exhibited superior reproducibility, excellent anti-interference performance and long-term stability. The present work could afford a viable method and efficient platform for fabricating all kinds of amperometric sensors and biosensors.
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Affiliation(s)
- Yanyan Zhang
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Weijin Road No. 94, Tianjin 300071, China
| | - Cong Zhang
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Weijin Road No. 94, Tianjin 300071, China
| | - Di Zhang
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Weijin Road No. 94, Tianjin 300071, China
| | - Min Ma
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Weijin Road No. 94, Tianjin 300071, China
| | - Weizhen Wang
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Weijin Road No. 94, Tianjin 300071, China
| | - Qiang Chen
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Weijin Road No. 94, Tianjin 300071, China.
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9
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Zhang K, Zuo W, Wang Z, Liu J, Li T, Wang B, Yang Z. A simple route to CoFe2O4 nanoparticles with shape and size control and their tunable peroxidase-like activity. RSC Adv 2015. [DOI: 10.1039/c4ra15675g] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new precursor-mediated growth of monodisperse magnetic CoFe2O4 NPs with controlled size and shape which exhibit size and shape dependent peroxidase like activity towards TMB in the presence of H2O2.
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Affiliation(s)
- Ke Zhang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- Lanzhou University Gansu
- Lanzhou
- P. R. China
| | - Wei Zuo
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- Lanzhou University Gansu
- Lanzhou
- P. R. China
| | - Zhiyi Wang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- Lanzhou University Gansu
- Lanzhou
- P. R. China
| | - Jian Liu
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- Lanzhou University Gansu
- Lanzhou
- P. R. China
| | - Tianrong Li
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- Lanzhou University Gansu
- Lanzhou
- P. R. China
| | - Baodui Wang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- Lanzhou University Gansu
- Lanzhou
- P. R. China
| | - Zhengyin Yang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry
- Lanzhou University Gansu
- Lanzhou
- P. R. China
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10
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Meemken F, Steiger T, Holland MC, Gilmour R, Hungerbühler K, Baiker A. Adsorption and stability of chiral modifiers based on 1-(1-naphthyl)-ethylamine for Pt catalysed heterogeneous asymmetric hydrogenations. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01136h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalytic and in situ ATR-IR spectroscopic investigations provide mechanistic insight relevant to heterogeneous asymmetric hydrogenation on Pt catalyst using naphthylethylamine-based modifiers.
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Affiliation(s)
- Fabian Meemken
- ETH Zürich
- Department of Chemistry and Applied Biosciences
- Institute for Chemical and Bioengineering
- Hönggerberg
- HCI
| | - Titian Steiger
- ETH Zürich
- Department of Chemistry and Applied Biosciences
- Institute for Chemical and Bioengineering
- Hönggerberg
- HCI
| | - Mareike C. Holland
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität Münster
- 48149 Münster
- Germany
| | - Ryan Gilmour
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität Münster
- 48149 Münster
- Germany
| | - Konrad Hungerbühler
- ETH Zürich
- Department of Chemistry and Applied Biosciences
- Institute for Chemical and Bioengineering
- Hönggerberg
- HCI
| | - Alfons Baiker
- ETH Zürich
- Department of Chemistry and Applied Biosciences
- Institute for Chemical and Bioengineering
- Hönggerberg
- HCI
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11
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Goubert G, Demers-Carpentier V, Loach RP, Lafleur-Lambert R, Lemay JC, Boukouvalas J, McBreen PH. Aminolactone Chiral Modifiers for Heterogeneous Asymmetric Hydrogenation: Corrected Structure of Pantoyl-Naphthylethylamine, In-Situ Hydrogenolysis, and Scanning Tunneling Microscopy Observation of Supramolecular Aminolactone/Substrate Assemblies on Pt(111). ACS Catal 2013. [DOI: 10.1021/cs4007588] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Guillaume Goubert
- Department of Chemistry and C3V, Université Laval, Québec, Canada G1V 0A6
| | | | - Richard P. Loach
- Department of Chemistry and C3V, Université Laval, Québec, Canada G1V 0A6
| | | | | | - John Boukouvalas
- Department of Chemistry and C3V, Université Laval, Québec, Canada G1V 0A6
| | - Peter H. McBreen
- Department of Chemistry and C3V, Université Laval, Québec, Canada G1V 0A6
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12
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Humblot V, Pradier CM. Chiral Recognition of l-Gramicidine on Chiraly Methionine-Modified Au(111). J Phys Chem Lett 2013; 4:1816-1820. [PMID: 26283114 DOI: 10.1021/jz400608n] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A chiral pentadecapeptide, l-gramicidine, has been shown to undergo specific adsorption onto gold surfaces modified by chiral amino acids, d- and l-methionine, upon adsorption in the liquid phase. There is a chiral recognition only between the slightly anionic l-peptide and the l-modified surface exhibiting cationic molecules. However, whatever the probe and target molecule charges, very weak recognition was observed between molecules of opposite chirality.
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Affiliation(s)
- Vincent Humblot
- Laboratoire de Réactivité de Surface, UMR CNRS 7197, Université Pierre et Marie Curie - UPMC case 178, 4 place Jussieu, 75005 Paris, France
| | - Claire-Marie Pradier
- Laboratoire de Réactivité de Surface, UMR CNRS 7197, Université Pierre et Marie Curie - UPMC case 178, 4 place Jussieu, 75005 Paris, France
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13
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Covalently grafted platinum nanoparticles to multi walled carbon nanotubes for enhanced electrocatalytic oxygen reduction. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.10.160] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Pereñiguez R, Santarossa G, Mallat T, Baiker A. Hydrogenation of 2,2,2-trifluoroacetophenone: Molecular insight into the role of solvent in enantioselection. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2012.08.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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15
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Zhang L, Li N, Gao F, Hou L, Xu Z. Insulin Amyloid Fibrils: An Excellent Platform for Controlled Synthesis of Ultrathin Superlong Platinum Nanowires with High Electrocatalytic Activity. J Am Chem Soc 2012; 134:11326-9. [DOI: 10.1021/ja302959e] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Longgai Zhang
- Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, P. R. China
| | - Na Li
- Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, P. R. China
| | - Faming Gao
- Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, P. R. China
| | - Li Hou
- Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, P. R. China
| | - Ziming Xu
- Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, P. R. China
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16
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Dehouche F, Archirel P, Remita H, Brodie-Linder N, Traverse A. Alcohol to water catalyzed by Pt nanoparticles: an experimental and computational approach. RSC Adv 2012. [DOI: 10.1039/c2ra20533e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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17
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Regioselective synthesis of 5-trifluoromethyl-1,2,3-triazoles via CF3-directed cyclization of 1-trifluoromethyl-1,3-dicarbonyl compounds with azides. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.110] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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18
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Mazurenko I, Etienne M, Ostermann R, Smarsly BM, Tananaiko O, Zaitsev V, Walcarius A. Controlled electrochemically-assisted deposition of sol-gel biocomposite on electrospun platinum nanofibers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:7140-7147. [PMID: 21542639 DOI: 10.1021/la200069z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The modification of platinum nanofibers by silica using the electrochemically-assisted deposition is reported here. Pt nanofibers are obtained by electrospinning and deposited on a glass substrate. The electrochemically-assisted deposition of the sol-gel material then gives the unique possibility to finely tune the silica film thickness around these nanofibers. It also allows the successful encapsulation of a biomolecule (glucose oxidase was chosen here as a model) while retaining its biological activity, as pointed out via the electrochemical monitoring of H(2)O(2) produced upon addition of glucose in the medium. This silica-glucose oxidase composite offers the possibility of comparing systematically the influence of the deposition time on the bioelectrode response and to compare it with the particular features of the deposits. It was found that the film first grew uniformly around the nanofibers and then started to deposit between them, covering the whole sample (fibers and glass substrate), and tended to fully embed the nanofibers for prolonged deposition. The thickness of the silica film is critical for the electroactivity of the biocomposite, the best response being obtained for a silica layer thickness in the range of the fiber diameter (∼50 nm).
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Affiliation(s)
- Ievgen Mazurenko
- Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, UMR 7564, CNRS-Institut Jean Barriol-Nancy-Université, 405 rue de Vandœuvre, 54600 Villers-lès-Nancy, France
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19
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Liu W, Repo E, Heikkilä M, Leskelä M, Sillanpää M. Hierarchical paramecium-like hollow and solid Au/Pt bimetallic nanostructures constructed using goethite as template. NANOTECHNOLOGY 2010; 21:395604. [PMID: 20820097 DOI: 10.1088/0957-4484/21/39/395604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Novel hollow and solid paramecium-like hierarchical Au/Pt bimetallic nanostructures were constructed using goethite as template via a seed-mediated growth method. Transmission electron microscopy (TEM), xi-potential measurement, UV-vis spectroscopy, energy dispersive x-ray spectroscopy (EDS), ICP-AES measurement, x-ray powder diffraction (XRD) and x-ray photoelectron spectroscopy (XPS) were utilized to systematically characterize the bimetallic nanostructures. It is found that the core structure of the paramecium-like bimetallic nanomaterial is closely related to reducing agent. When ascorbic acid is used as reducing agent, goethite serves as in situ sacrificed template and hollow paramecium-like bimetallic structure is obtained. When NH(2)OH.HCl is used, solid nanostructure with preserved goethite core is produced. Heating the reaction solution is necessary to obtain the paramecium-like morphology with rough interconnected Pt cilia shell. The thickness of Pt cilia layer can be controlled by adjusting the molar ratio of H(2)PtCl(6) to Au nanoseeds. The overgrowth of the rough Pt cilia is proposed to be via an autocatalytic and three-dimensional heterogeneous nucleation process first through flower-like morphology. Both the hollow and solid hierarchical paramecium-like Au/Pt bimetallic nanostructures show good catalytic activities.
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Affiliation(s)
- Wei Liu
- Laboratory of Applied Environmental Chemistry, University of Eastern Finland, Mikkeli, Finland.
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20
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Milagre CDF, Milagre HMS, Moran PJS, Rodrigues JAR. Chemoenzymatic synthesis of alpha-hydroxy-beta-methyl-gamma-hydroxy esters: role of the keto-enol equilibrium to control the stereoselective hydrogenation in a key step. J Org Chem 2010; 75:1410-8. [PMID: 20143825 DOI: 10.1021/jo902227f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Alpha-hydroxy-beta-methyl-gamma-hydroxy esters not only are found in many natural products and potent drugs but also are useful intermediates in organic synthesis due to their highly functionalized skeleton that can be further manipulated and applied in the synthesis of many compounds with remarkable biological activities. This work was based on a chemoenzymatic approach to obtain these molecules with three contiguous stereogenic centers in a highly enantio- and diastereoselective way. Two distinct linear routes were proposed in which the key steps in both routes consisted of initial stereocontrolled ketoester bioreduction followed by unsaturated carbonyl bioreduction or reduction with Pd-C. Other key reactions in the synthesis include a Wasserman protocol for chain homologation and a Mannich-type olefination with maintenance of enantiomeric excess for all intermediates during the sequence. Whereas route A gave exclusively the skeleton with 3R,4R,5S configuration (99% ee and 11.5% global yield after 7 steps), route B gave the skeleton with 3R,4R,5S and 3R,4S,5R configurations (dr 1:12, 98% ee and 20% global yield after 5 steps).
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Affiliation(s)
- Cíntia D F Milagre
- Institute of Chemistry, University of Campinas-UNICAMP, PO Box 6154, 13084-970 Campinas, SP, Brazil
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21
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Bartók M. Unexpected inversions in asymmetric reactions: reactions with chiral metal complexes, chiral organocatalysts, and heterogeneous chiral catalysts. Chem Rev 2010; 110:1663-705. [PMID: 19873975 DOI: 10.1021/cr9002352] [Citation(s) in RCA: 310] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mihály Bartók
- Department of Organic Chemistry, University of Szeged, Stereochemistry Research Group of the Hungarian Academy of Sciences, Dóm tér 8, H-6720 Szeged, Hungary
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22
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Funabiki K, Furuno Y, Sato F, Gonda H, Kubota Y, Matsui M. A Versatile Approach to 2-Substituted 3-Trifluoromethyl-1,3-diols Based on the Reaction of Trifluoroacetaldehyde Ethyl Hemiacetal with Enamines Derived from Aldehydes. CHEM LETT 2010. [DOI: 10.1246/cl.2010.410] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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23
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Guo S, Dong S, Wang E. Three-dimensional Pt-on-Pd bimetallic nanodendrites supported on graphene nanosheet: facile synthesis and used as an advanced nanoelectrocatalyst for methanol oxidation. ACS NANO 2010; 4:547-55. [PMID: 20000845 DOI: 10.1021/nn9014483] [Citation(s) in RCA: 620] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Graphene nanosheet, the hottest material in physics and materials science, has been studied extensively because of its unique electronic, thermal, mechanical, and chemical properties arising from its strictly 2D structure and because of its potential technical applications. Particularly, these remarkable characteristics enable it to be a promising candidate as a new 2D support to load metal nanoparticles (NPs) for application in fuel cells. However, constructing high-quality graphene/bimetallic NP hybrids with high electrochemical surface area (ECSA) remains a great challenge to date. In this paper, we demonstrate for the first time a wet-chemical approach for the synthesis of high-quality three-dimensional (3D) Pt-on-Pd bimetallic nanodendrites supported on graphene nanosheets (TP-BNGN), which represents a new type of graphene/metal heterostructure. The resulting hybrids were characterized by atomic force microscopy (AFM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), energy-dispersive X-ray (EDX) spectroscopy, X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), Raman spectroscopy, and electrochemical technique. It is found that small single-crystal Pt nanobranches supported on Pd NCs with porous structure and good dispersion were directly grown onto the surface of graphene nanosheets, which exhibits high electrochemical active area. Furthermore, the number of nanobranches for Pt-on-Pd bimetallic nanodendrites on the surface of graphene nanosheets could be easily controlled via simply changing the synthetic parameters, thus resulting in the tunable catalytic properties. Most importantly, the electrochemical data indicate that the as-prepared graphene/bimetallic nanodendrite hybrids exhibited much higher electrocatalytic activity toward methanol oxidation reaction than the platinum black (PB) and commercial E-TEK Pt/C catalysts.
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Affiliation(s)
- Shaojun Guo
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China
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24
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Gao F, Chen QH, Wang FP. Platinum–triethylamine-catalyzed hydrogenation of aldehydes and cyclohexanones. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.07.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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25
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Liu XY, Che CM. Highly Efficient and Regioselective Platinum(II)-Catalyzed Tandem Synthesis of Multiply Substituted Indolines and Tetrahydroquinolines. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200805383] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Busygin I, Taskinen A, Nieminen V, Toukoniitty E, Stillger T, Leino R, Murzin DY. Experimental and Theoretical Analysis of Asymmetric Induction in Heterogeneous Catalysis: Diastereoselective Hydrogenation of Chiral α-Hydroxyketones over Pt Catalyst. J Am Chem Soc 2009; 131:4449-62. [DOI: 10.1021/ja809070g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Igor Busygin
- Laboratory of Organic Chemistry and Laboratory of Industrial Chemistry and Reaction Engineering, Åbo Akademi University, FI-20500 Turku/Åbo, Finland, and Faculty of Chemistry, Pharmacy, and Earth Sciences, University of Freiburg, Hebelstraβe 27, D-79085 Freiburg, Germany
| | - Antti Taskinen
- Laboratory of Organic Chemistry and Laboratory of Industrial Chemistry and Reaction Engineering, Åbo Akademi University, FI-20500 Turku/Åbo, Finland, and Faculty of Chemistry, Pharmacy, and Earth Sciences, University of Freiburg, Hebelstraβe 27, D-79085 Freiburg, Germany
| | - Ville Nieminen
- Laboratory of Organic Chemistry and Laboratory of Industrial Chemistry and Reaction Engineering, Åbo Akademi University, FI-20500 Turku/Åbo, Finland, and Faculty of Chemistry, Pharmacy, and Earth Sciences, University of Freiburg, Hebelstraβe 27, D-79085 Freiburg, Germany
| | - Esa Toukoniitty
- Laboratory of Organic Chemistry and Laboratory of Industrial Chemistry and Reaction Engineering, Åbo Akademi University, FI-20500 Turku/Åbo, Finland, and Faculty of Chemistry, Pharmacy, and Earth Sciences, University of Freiburg, Hebelstraβe 27, D-79085 Freiburg, Germany
| | - Thomas Stillger
- Laboratory of Organic Chemistry and Laboratory of Industrial Chemistry and Reaction Engineering, Åbo Akademi University, FI-20500 Turku/Åbo, Finland, and Faculty of Chemistry, Pharmacy, and Earth Sciences, University of Freiburg, Hebelstraβe 27, D-79085 Freiburg, Germany
| | - Reko Leino
- Laboratory of Organic Chemistry and Laboratory of Industrial Chemistry and Reaction Engineering, Åbo Akademi University, FI-20500 Turku/Åbo, Finland, and Faculty of Chemistry, Pharmacy, and Earth Sciences, University of Freiburg, Hebelstraβe 27, D-79085 Freiburg, Germany
| | - Dmitry Yu. Murzin
- Laboratory of Organic Chemistry and Laboratory of Industrial Chemistry and Reaction Engineering, Åbo Akademi University, FI-20500 Turku/Åbo, Finland, and Faculty of Chemistry, Pharmacy, and Earth Sciences, University of Freiburg, Hebelstraβe 27, D-79085 Freiburg, Germany
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Liu XY, Che CM. Highly Efficient and Regioselective Platinum(II)-Catalyzed Tandem Synthesis of Multiply Substituted Indolines and Tetrahydroquinolines. Angew Chem Int Ed Engl 2009; 48:2367-71. [DOI: 10.1002/anie.200805383] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wang Y, Song S, Shen PK, Guo C, Li CM. Nanochain-structured mesoporous tungsten carbide and its superior electrocatalysis. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b902744k] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fluorine‐Containing Ionic Liquids fromN‐Alkylpyrrolidine andN‐Methylpiperidine and Fluorinated Acetylacetones: Low Melting Points and Low Viscosities. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800448] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Methylethers of cinchona alkaloids in Pt-catalyzed hydrogenation of methyl benzoylformate and pyruvaldehyde dimethyl acetal. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcata.2008.01.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Vargas A, Reimann S, Diezi S, Mallat T, Baiker A. Adsorption modes of aromatic ketones on platinum and their reactivity towards hydrogenation. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcata.2007.11.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Mallat T, Orglmeister E, Baiker A. Asymmetric Catalysis at Chiral Metal Surfaces. Chem Rev 2007; 107:4863-90. [DOI: 10.1021/cr0683663] [Citation(s) in RCA: 501] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- T. Mallat
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, CH-8093 Zurich, Switzerland
| | - E. Orglmeister
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, CH-8093 Zurich, Switzerland
| | - A. Baiker
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, CH-8093 Zurich, Switzerland
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Wang C, Daimon H, Lee Y, Kim J, Sun S. Synthesis of monodisperse Pt nanocubes and their enhanced catalysis for oxygen reduction. J Am Chem Soc 2007; 129:6974-5. [PMID: 17500520 DOI: 10.1021/ja070440r] [Citation(s) in RCA: 500] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chao Wang
- Department of Chemistry and Division of Engineering, Brown University, Providence, Rhode Island 02912, USA
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