151
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Collier VE, Ellebracht NC, Lindy GI, Moschetta EG, Jones CW. Kinetic and Mechanistic Examination of Acid–Base Bifunctional Aminosilica Catalysts in Aldol and Nitroaldol Condensations. ACS Catal 2015. [DOI: 10.1021/acscatal.5b02398] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Virginia E. Collier
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
| | - Nathan C. Ellebracht
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
| | - George I. Lindy
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
| | - Eric G. Moschetta
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
| | - Christopher W. Jones
- School of Chemical & Biomolecular Engineering Georgia Institute of Technology 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
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152
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Motokura K, Saitoh K, Noda H, Uemura Y, Chun WJ, Miyaji A, Yamaguchi S, Baba T. Co-Immobilization of a Palladium-Bisphosphine Complex and Strong Organic Base on a Silica Surface for Heterogeneous Synergistic Catalysis. ChemCatChem 2015. [DOI: 10.1002/cctc.201501178] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ken Motokura
- Department of Environmental Chemistry and Engineering; Tokyo Institute of Technology; 4259 Nagatsuta-cho Midori-ku Yokohama 226-8502 Japan
| | - Koki Saitoh
- Department of Environmental Chemistry and Engineering; Tokyo Institute of Technology; 4259 Nagatsuta-cho Midori-ku Yokohama 226-8502 Japan
| | - Hiroto Noda
- Department of Environmental Chemistry and Engineering; Tokyo Institute of Technology; 4259 Nagatsuta-cho Midori-ku Yokohama 226-8502 Japan
| | - Yohei Uemura
- Division of Electronic Structure; Department of Materials Molecular Science; Institute for Molecular Science; Myodaiji Okazaki 444-8585 Japan
| | - Wang-Jae Chun
- Graduate School of Arts and Sciences; International Christian University; Mitaka Tokyo 181-8585 Japan
| | - Akimitsu Miyaji
- Department of Environmental Chemistry and Engineering; Tokyo Institute of Technology; 4259 Nagatsuta-cho Midori-ku Yokohama 226-8502 Japan
| | - Sho Yamaguchi
- Department of Environmental Chemistry and Engineering; Tokyo Institute of Technology; 4259 Nagatsuta-cho Midori-ku Yokohama 226-8502 Japan
| | - Toshihide Baba
- Department of Environmental Chemistry and Engineering; Tokyo Institute of Technology; 4259 Nagatsuta-cho Midori-ku Yokohama 226-8502 Japan
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153
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Zohreh N, Hosseini SH, Pourjavadi A, Bennett C. Immobilized copper(II) on nitrogen-rich polymer-entrapped Fe3O4nanoparticles: a highly loaded and magnetically recoverable catalyst for aqueous click chemistry. Appl Organomet Chem 2015. [DOI: 10.1002/aoc.3398] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Nasrin Zohreh
- Department of Chemistry, Faculty of Science; University of Qom; PO Box 37185-359 Qom Iran
| | - Seyed Hassan Hosseini
- Polymer Research Laboratory, Department of Chemistry; Sharif University of Technology; Tehran Iran
| | - Ali Pourjavadi
- Polymer Research Laboratory, Department of Chemistry; Sharif University of Technology; Tehran Iran
| | - Craig Bennett
- Department of Physics; Acadia University; Wolfville Nova Scotia Canada
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154
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Martí-Gastaldo C, Warren JE, Briggs ME, Armstrong JA, Thomas KM, Rosseinsky MJ. Sponge-Like Behaviour in Isoreticular Cu(Gly-His-X) Peptide-Based Porous Materials. Chemistry 2015; 21:16027-34. [PMID: 26406996 PMCID: PMC4676333 DOI: 10.1002/chem.201502098] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/18/2015] [Indexed: 11/08/2022]
Abstract
We report two isoreticular 3D peptide-based porous frameworks formed by coordination of the tripeptides Gly-L-His-Gly and Gly-L-His-L-Lys to Cu(II) which display sponge-like behaviour. These porous materials undergo structural collapse upon evacuation that can be reversed by exposure to water vapour, which permits recovery of the original open channel structure. This is further confirmed by sorption studies that reveal that both solids exhibit selective sorption of H2 O while CO2 adsorption does not result in recovery of the original structures. We also show how the pendant aliphatic amine chains, present in the framework from the introduction of the lysine amino acid in the peptidic backbone, can be post-synthetically modified to produce urea-functionalised networks by following methodologies typically used for metal-organic frameworks built from more rigid "classical" linkers.
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Affiliation(s)
- Carlos Martí-Gastaldo
- Department of Chemistry, University of LiverpoolCrown Street, Liverpool, L69 7ZD (UK)E-mail:
- Instituto de Ciencia Molecular (ICMol), Universidad de ValenciaPaterna, 46980 (Spain)E-mail:
| | - John E Warren
- Department of Chemistry, University of LiverpoolCrown Street, Liverpool, L69 7ZD (UK)E-mail:
- School of Materials, The University of ManchesterSackville Street, Manchester, M1 3BB (UK)
| | - Michael E Briggs
- Department of Chemistry, University of LiverpoolCrown Street, Liverpool, L69 7ZD (UK)E-mail:
| | - Jayne A Armstrong
- Wolfson Northern Carbon Reduction LaboratoriesSchool of Chemical, Engineering and Advanced Materials, Newcastle University, Newcastle upon Tyne, NE1 7RU (UK)
| | - K Mark Thomas
- Wolfson Northern Carbon Reduction LaboratoriesSchool of Chemical, Engineering and Advanced Materials, Newcastle University, Newcastle upon Tyne, NE1 7RU (UK)
| | - Matthew J Rosseinsky
- Department of Chemistry, University of LiverpoolCrown Street, Liverpool, L69 7ZD (UK)E-mail:
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155
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Zirconium-containing metal organic frameworks as solid acid catalysts for the esterification of free fatty acids: Synthesis of biodiesel and other compounds of interest. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.08.015] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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156
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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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157
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Ternary Phase-Separation Investigation of Sol-Gel Derived Silica from Ethyl Silicate 40. Sci Rep 2015; 5:14560. [PMID: 26411484 PMCID: PMC4585945 DOI: 10.1038/srep14560] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 08/28/2015] [Indexed: 11/12/2022] Open
Abstract
A ternary phase-separation investigation of the ethyl silicate 40 (ES40) sol-gel process was conducted using ethanol and water as the solvent and hydrolysing agent, respectively. This oligomeric silica precursor underwent various degrees of phase separation behaviour in solution during the sol-gel reactions as a function of temperature and H2O/Si ratios. The solution composition within the immiscible region of the ES40 phase-separated system shows that the hydrolysis and condensation reactions decreased with decreasing reaction temperature. A mesoporous structure was obtained at low temperature due to weak drying forces from slow solvent evaporation on one hand and formation of unreacted ES40 cages in the other, which reduced network shrinkage and produced larger pores. This was attributed to the concentration of the reactive sites around the phase-separated interface, which enhanced the condensation and crosslinking. Contrary to dense silica structures obtained from sol-gel reactions in the miscible region, higher microporosity was produced via a phase-separated sol-gel system by using high H2O/Si ratios. This tailoring process facilitated further condensation reactions and crosslinking of silica chains, which coupled with stiffening of the network, made it more resistant to compression and densification.
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158
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Van de Vyver S, Román-Leshkov Y. Metalloenzyme-Like Zeolites as Lewis Acid Catalysts for CC Bond Formation. Angew Chem Int Ed Engl 2015; 54:12554-61. [DOI: 10.1002/anie.201503701] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Indexed: 11/05/2022]
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159
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Van de Vyver S, Román‐Leshkov Y. Metalloenzymartige Zeolithe als Lewis‐Säure‐Katalysatoren für die C‐C‐Bindungsbildung. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503701] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Stijn Van de Vyver
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA) http://www.romangroup.mit.edu
| | - Yuriy Román‐Leshkov
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA) http://www.romangroup.mit.edu
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160
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Polyamine Anchored Palladium Catalyst for Suzuki–Miyaura and One-Pot O-Alkylation-Suzuki Reactions. Catal Letters 2015. [DOI: 10.1007/s10562-015-1570-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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161
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Lewis JD, Van de Vyver S, Román‐Leshkov Y. Acid–Base Pairs in Lewis Acidic Zeolites Promote Direct Aldol Reactions by Soft Enolization. Angew Chem Int Ed Engl 2015; 54:9835-8. [DOI: 10.1002/anie.201502939] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Jennifer D. Lewis
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA) http://www.romangroup.mit.edu
| | - Stijn Van de Vyver
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA) http://www.romangroup.mit.edu
| | - Yuriy Román‐Leshkov
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA) http://www.romangroup.mit.edu
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162
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Lewis JD, Van de Vyver S, Román‐Leshkov Y. Acid–Base Pairs in Lewis Acidic Zeolites Promote Direct Aldol Reactions by Soft Enolization. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502939] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jennifer D. Lewis
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA) http://www.romangroup.mit.edu
| | - Stijn Van de Vyver
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA) http://www.romangroup.mit.edu
| | - Yuriy Román‐Leshkov
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (USA) http://www.romangroup.mit.edu
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163
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Najafi M, Abbasi A, Masteri-Farahani M, Rodrigues VHN. Synthesis, characterization and crystal structure of a copper molybdate coordination polymer as an epoxidation catalyst. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.04.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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164
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Shu XZ, Nguyen SC, He Y, Oba F, Zhang Q, Canlas C, Somorjai GA, Alivisatos AP, Toste FD. Silica-Supported Cationic Gold(I) Complexes as Heterogeneous Catalysts for Regio- and Enantioselective Lactonization Reactions. J Am Chem Soc 2015; 137:7083-6. [DOI: 10.1021/jacs.5b04294] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xing-Zhong Shu
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- State
Key Laboratory of Applied Organic Chemistry, and College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Son C. Nguyen
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Ying He
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Fadekemi Oba
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Qiao Zhang
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Christian Canlas
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Gabor A. Somorjai
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - A. Paul Alivisatos
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - F. Dean Toste
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
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165
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Zaera F. New advances in the use of infrared absorption spectroscopy for the characterization of heterogeneous catalytic reactions. Chem Soc Rev 2015; 43:7624-63. [PMID: 24424375 DOI: 10.1039/c3cs60374a] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Infrared absorption spectroscopy has proven to be one of the most powerful spectroscopic techniques available for the characterization of catalytic systems. Although the history of IR absorption spectroscopy in catalysis is long, the technique continues to provide key fundamental information about a variety of catalysts and catalytic reactions, and to also offer novel options for the acquisition of new information on both reaction mechanisms and the nature of the solids used as catalysts. In this review, an overview is provided of the main contributions that have been derived from IR absorption spectroscopy studies of catalytic systems, and a discussion is included on new trends and new potential directions of research involving IR in catalysis. We start by briefly describing the power of Fourier-transform IR (FTIR) instruments and the main experimental IR setups available, namely, transmission (TIR), diffuse reflectance (DRIFTS), attenuated total reflection (ATR-IR), and reflection-absorption (RAIRS), for advancing research in catalysis. We then discuss the different environments under which IR characterization of catalysts is carried out, including in situ and operando studies of typical catalytic processes in gas-phase, research with model catalysts in ultrahigh vacuum (UHV) and so-called high-pressure cell instruments, and work involving liquid/solid interfaces. A presentation of the type of information extracted from IR data follows in terms of the identification of adsorbed intermediates, the characterization of the surfaces of the catalysts themselves, the quantitation of IR intensities to extract surface coverages, and the use of probe molecules to identify and titrate specific catalytic sites. Finally, the different options for carrying out kinetic studies with temporal resolution such as rapid-scan FTIR, step-scan FTIR, and the use of tunable lasers or synchrotron sources, and to obtain spatially resolved spectra, by sample rastering or by 2D imaging, are introduced.
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Affiliation(s)
- Francisco Zaera
- Department of Chemistry, University of California, Riverside, CA 92521, USA.
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166
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Xiong L, Zhang H, Zhong A, He Z, Huang K. Acid- and base-functionalized core-confined bottlebrush copolymer catalysts for one-pot cascade reactions. Chem Commun (Camb) 2015; 50:14778-81. [PMID: 25317577 DOI: 10.1039/c4cc06573e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We demonstrate a novel method that enables the formation of core-confined bottlebrush copolymers (CCBCs) as catalyst supports. Significantly, owing to the site-isolated effect, these CCBC catalysts with the incompatible acidic para-toluenesulfonic acid (PTSA) and basic 4-(dimethylamino)pyridine (DMAP) groups can conduct a simple two-step sequential reaction in one vessel.
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Affiliation(s)
- Linfeng Xiong
- Department of Chemistry, East China Normal University, Shanghai, 200241, P. R. China.
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167
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Sun Q, Zhang XQ, Wang Y, Lu AH. Recent progress on core-shell nanocatalysts. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(14)60298-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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168
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Gawande MB, Monga Y, Zboril R, Sharma R. Silica-decorated magnetic nanocomposites for catalytic applications. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.01.001] [Citation(s) in RCA: 192] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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169
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Karimi B, Khorasani M, Bakhshandeh Rostami F, Elhamifar D, Vali H. Tungstate Supported on Periodic Mesoporous Organosilica with Imidazolium Framework as an Efficient and Recyclable Catalyst for the Selective Oxidation of Sulfides. Chempluschem 2015; 80:990-999. [DOI: 10.1002/cplu.201500010] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Indexed: 12/20/2022]
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170
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Moschetta EG, Sakwa-Novak MA, Greenfield JL, Jones CW. Post-grafting amination of alkyl halide-functionalized silica for applications in catalysis, adsorption, and 15N NMR spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:2218-27. [PMID: 25647627 DOI: 10.1021/la5046817] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
An anhydrous synthesis of aminosilica materials from alkyl halide-functionalized mesoporous SBA-15 silica by post-grafting amination is introduced for applications in CO2 adsorption, cooperative catalysis, and (15)N solid-state NMR spectroscopy. The synthesis is demonstrated to convert terminal alkyl halide-functionalized silica materials containing Cl, Br, and I to primary alkylamines using anhydrous ammonia in a high-pressure reactor. The benefits of the post-grafting amination procedure include (i) use of anhydrous isotopically labeled ammonia, (15)NH3, to create aminosilica materials that can be investigated using (15)N solid-state NMR to elucidate potential intermediates and surface species in CO2 adsorption processes and catalysis, (ii) similar CO2 uptake in experiments extracting CO2 from dry simulated air experiments, and (iii) improved activity in acid-base bifunctional catalysis compared to traditional amine-grafted materials. The effects of the type of halide, the initial halide loading, and the total reaction time on the conversion of the halides to primary amines are explored. Physical and chemical characterizations of the materials show that the textural properties of the silica are unaffected by the reaction conditions and that quantitative conversion to primary amines is achieved even at short reaction times and high initial alkyl halide loadings. Additionally, preliminary (15)N solid-state NMR experiments indicate formation of nitrogen-containing species and demonstrate that the synthesis can be used to create materials useful for investigating surface species by NMR spectroscopy. The differences between the materials prepared via post-grafting amination vs traditional aminosilane grafting are attributed to the slightly increased spacing of the amines synthesized by amination because the alkylhalosilanes are initially better spaced on the silica surface after grafting, whereas the aminosilanes likely cluster to a greater extent when grafted on the silica surface. A slight increase in amine spacing allows for more effective amine-silanol interactions in cooperative catalysis without reducing the amine efficiency in CO2 uptake under the conditions used here.
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Affiliation(s)
- Eric G Moschetta
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology , 311 Ferst Drive NW, Atlanta, Georgia 30332, United States
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171
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Sankaranarayanapillai S, Sreekumar S, Gomes J, Grippo A, Arab GE, Head-Gordon M, Toste FD, Bell AT. Catalytic Upgrading of Biomass-Derived Methyl Ketones to Liquid Transportation Fuel Precursors by an Organocatalytic Approach. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412470] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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172
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Sankaranarayanapillai S, Sreekumar S, Gomes J, Grippo A, Arab GE, Head-Gordon M, Toste FD, Bell AT. Catalytic Upgrading of Biomass-Derived Methyl Ketones to Liquid Transportation Fuel Precursors by an Organocatalytic Approach. Angew Chem Int Ed Engl 2015; 54:4673-7. [DOI: 10.1002/anie.201412470] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Indexed: 11/05/2022]
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173
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Shylesh S, Hanna D, Gomes J, Canlas CG, Head-Gordon M, Bell AT. The role of hydroxyl group acidity on the activity of silica-supported secondary amines for the self-condensation of n-butanal. CHEMSUSCHEM 2015; 8:466-472. [PMID: 25314616 DOI: 10.1002/cssc.201402443] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 07/30/2014] [Indexed: 06/04/2023]
Abstract
The catalytic activity of secondary amines supported on mesoporous silica for the self-condensation of n-butanal to 2-ethylhexenal can be altered significantly by controlling the Brønsted acidity of M--OH species present on the surface of the support. In this study, M--OH (M=Sn, Zr, Ti, and Al) groups were doped onto the surface of SBA-15, a mesoporous silica, prior to grafting secondary propyl amine groups on to the support surface. The catalytic activity was found to depend critically on the synthesis procedure, the nature and amount of metal species introduced and the spatial separation between the acidic sites and amine groups. DFT analysis of the reaction pathway indicates that, for weak Brønsted acid groups, such as Si--OH, the rate-limiting step is C--C bond formation, whereas for stronger Brønsted acid groups, such as Ti and Al, hydrolysis of iminium species produced upon C--C bond formation is the rate-limiting step. Theoretical analysis shows further that the apparent activation energy decreases with increasing Brønsted acidity of the M--OH groups, consistent with experimental observation.
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174
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Zhang F, Jiang H, Wu X, Mao Z, Li H. Organoamine-functionalized graphene oxide as a bifunctional carbocatalyst with remarkable acceleration in a one-pot multistep reaction. ACS APPLIED MATERIALS & INTERFACES 2015; 7:1669-1677. [PMID: 25556875 DOI: 10.1021/am507221a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this work, we reported the synthesis of bifunctional carbocatalyst with acid-base dual-activation mechanism by introducing organoamines on the basal planes of graphene oxide (GO). Interestingly, GO-supported primary amine (AP-GO) exclusively promoted one-pot Henry-Michael reactions with excellent activity to give synthetically valuable multifunctionalized nitroalkanes. Notably, it also exhibited significantly higher activity than those using propylamine, activated carbon-supported primary amine, and mesoporous silica-supported primary amine as the catalysts. This superior catalytic performance originated from the unique properties of AP-GO, which provided the acid-base cooperative effect by the appropriate positioning of primary amines on their basal planes and carboxyl acids along their edges and the decreased diffusion resistance of the reactants and the intermediates during the multistep catalytic cycles because of its open two-dimensional sheet-like structure. Moreover, it could be readily recycled by simple filtration and subsequently reused without significant loss of its catalytic activity in a six times run test.
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Affiliation(s)
- Fang Zhang
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University , Shanghai 200234, P. R. China
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175
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Rodríguez-Escrich C, Pericàs MA. Organocatalysis on Tap: Enantioselective Continuous Flow Processes Mediated by Solid-Supported Chiral Organocatalysts. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403042] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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176
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Newland SH, Xuereb DJ, Gianotti E, Marchese L, Rios R, Raja R. Highly effective design strategy for the heterogenisation of chemo- and enantioselective organocatalysts. Catal Sci Technol 2015. [DOI: 10.1039/c4cy00895b] [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
The covalent heterogenisation of cinchonine and 1,4-diazabicyclo[2.2.2]octane within a range of mesoporous silicas affords highly selective and active organocatalysts.
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Affiliation(s)
| | | | - Enrica Gianotti
- Dipartimento di Scienze e Innovazione Tecnologica
- Centro Interdisciplinare Nano-SiSTeMI
- Università del Piemonte Orientale “A. Avogadro”
- Alessandria
- Italy
| | - Leonardo Marchese
- Dipartimento di Scienze e Innovazione Tecnologica
- Centro Interdisciplinare Nano-SiSTeMI
- Università del Piemonte Orientale “A. Avogadro”
- Alessandria
- Italy
| | - Ramon Rios
- School of Chemistry
- University of Southampton
- Southampton
- UK
| | - Robert Raja
- School of Chemistry
- University of Southampton
- Southampton
- UK
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177
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Noda H, Motokura K, Chun WJ, Miyaji A, Yamaguchi S, Baba T. Heterogeneous double-activation catalysis: Rh complex and tertiary amine on the same solid surface for the 1,4-addition reaction of aryl- and alkylboronic acids. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00133a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Double-activation catalysis by a rhodium complex/tertiary amine catalyst for the 1,4-addition of organoboronic acids was investigated.
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Affiliation(s)
- Hiroto Noda
- Department of Environmental Chemistry and Engineering
- Tokyo Institute of Technology
- Yokohama
- Japan
| | - Ken Motokura
- Department of Environmental Chemistry and Engineering
- Tokyo Institute of Technology
- Yokohama
- Japan
| | - Wang-Jae Chun
- Graduate School of Arts and Sciences
- International Christian University
- Mitaka
- Japan
| | - Akimitsu Miyaji
- Department of Environmental Chemistry and Engineering
- Tokyo Institute of Technology
- Yokohama
- Japan
| | - Sho Yamaguchi
- Department of Environmental Chemistry and Engineering
- Tokyo Institute of Technology
- Yokohama
- Japan
| | - Toshihide Baba
- Department of Environmental Chemistry and Engineering
- Tokyo Institute of Technology
- Yokohama
- Japan
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178
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Hong J, Lee I, Zaera F. Correlated bifunctionality in heterogeneous catalysts: selective tethering of cinchonidine next to supported Pt nanoparticles. Catal Sci Technol 2015. [DOI: 10.1039/c4cy00844h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A strategy has been devised to add molecular functionality to heterogeneous catalysts in a spatially correlated fashion.
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Affiliation(s)
- Junghyun Hong
- Department of Chemistry
- University of California
- Riverside
- USA
| | - Ilkeun Lee
- Department of Chemistry
- University of California
- Riverside
- USA
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179
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Ferenc M, Katir N, Miłowska K, Bousmina M, Majoral JP, Bryszewska M, El Kadib A. Haemolytic activity and cellular toxicity of SBA-15-type silicas: elucidating the role of the mesostructure, surface functionality and linker length. J Mater Chem B 2015; 3:2714-2724. [DOI: 10.1039/c4tb01901f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Haemolytic activity and cellular toxicity of native, amino-, mercapto-, and carboxy-terminated SBA-15-type silicates were investigated.
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Affiliation(s)
- Małgorzata Ferenc
- Department of General Biophysics
- Faculty of Biology and Environmental Protection
- University of Lodz
- Lodz
- Poland
| | - Nadia Katir
- Euromed Research Institute
- Engineering Division
- Euro-Mediterranean University of Fes (UEMF)
- 30070 Fès
- Morocco
| | - Katarzyna Miłowska
- Department of General Biophysics
- Faculty of Biology and Environmental Protection
- University of Lodz
- Lodz
- Poland
| | - Mosto Bousmina
- Euromed Research Institute
- Engineering Division
- Euro-Mediterranean University of Fes (UEMF)
- 30070 Fès
- Morocco
| | - Jean-Pierre Majoral
- Laboratoire de Chimie de Coordination (LCC) CNRS
- 205 route de Narbonne
- 31077 Toulouse Cedex 4
- France
| | - Maria Bryszewska
- Department of General Biophysics
- Faculty of Biology and Environmental Protection
- University of Lodz
- Lodz
- Poland
| | - Abdelkrim El Kadib
- Euromed Research Institute
- Engineering Division
- Euro-Mediterranean University of Fes (UEMF)
- 30070 Fès
- Morocco
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180
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Sun LB, Liu XQ, Zhou HC. Design and fabrication of mesoporous heterogeneous basic catalysts. Chem Soc Rev 2015; 44:5092-147. [DOI: 10.1039/c5cs00090d] [Citation(s) in RCA: 287] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Recent advances in mesoporous solid bases were reviewed, and fundamental principles of how to fabricate efficient basic catalysts were highlighted.
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Affiliation(s)
- Lin-Bing Sun
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Xiao-Qin Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemistry and Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- China
| | - Hong-Cai Zhou
- Department of Chemistry
- Texas A&M University
- College Station
- USA
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181
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Razavi N, Akhlaghinia B. Cu(ii) immobilized on aminated epichlorohydrin activated silica (CAES): as a new, green and efficient nanocatalyst for preparation of 5-substituted-1H-tetrazoles. RSC Adv 2015. [DOI: 10.1039/c4ra15148h] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Reusable nanocatalyst was prepared and characterized an efficient and environmentally benign method of 5-substituted-1H-tetrazole synthesis was introduced.
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Affiliation(s)
- Nasrin Razavi
- Department of Chemistry
- Faculty of Sciences
- Ferdowsi University of Mashhad
- Mashhad 9177948974
- Iran
| | - Batool Akhlaghinia
- Department of Chemistry
- Faculty of Sciences
- Ferdowsi University of Mashhad
- Mashhad 9177948974
- Iran
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182
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Sobhani S, Zarifi F. Pyridine-grafted graphene oxide: a reusable acid–base bifunctional catalyst for the one-pot synthesis of β-phosphonomalonates via a cascade Knoevenagel–phospha Michael addition reaction in water. RSC Adv 2015. [DOI: 10.1039/c5ra13083b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Py–GO as a new acid–base bifunctional catalyst was synthesized and employed for the one-pot synthesis of β-phosphonomalonates in water.
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Affiliation(s)
- Sara Sobhani
- Department of Chemistry
- College of Sciences
- University of Birjand
- Birjand
- Iran
| | - Farzaneh Zarifi
- Department of Chemistry
- College of Sciences
- University of Birjand
- Birjand
- Iran
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183
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Vernekar D, Jagadeesan D. Tunable acid–base bifunctional catalytic activity of FeOOH in an orthogonal tandem reaction. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00361j] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this report, we have explored the acid–base bifunctional catalytic activity of iron oxohydroxides (FeOOH) by catalyzing deacetalization and Henry condensation reactions successively in a single pot.
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Affiliation(s)
- D. Vernekar
- Physical and Materials Chemistry Division
- CSIR National Chemical Laboratory
- Pune – 411 008
- India
| | - D. Jagadeesan
- Physical and Materials Chemistry Division
- CSIR National Chemical Laboratory
- Pune – 411 008
- India
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184
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Wang S, Wang DK, Jack KS, Smart S, Diniz da Costa JC. Improved hydrothermal stability of silica materials prepared from ethyl silicate 40. RSC Adv 2015. [DOI: 10.1039/c4ra12483a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hydrothermally stable ES40-derived silica matrices with less than 30% pore volume loss are closely associated with a more open silica microstructure formed from thermal consolidation of larger silica particles.
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Affiliation(s)
- Shengnan Wang
- The University of Queensland
- FIMLab – Films and Inorganic Membrane Laboratory
- School of Chemical Engineering
- Brisbane
- Australia
| | - David K. Wang
- The University of Queensland
- FIMLab – Films and Inorganic Membrane Laboratory
- School of Chemical Engineering
- Brisbane
- Australia
| | - Kevin S. Jack
- The University of Queensland
- Centre for Microscopy and Microanalysis
- Brisbane
- Australia
| | - Simon Smart
- The University of Queensland
- FIMLab – Films and Inorganic Membrane Laboratory
- School of Chemical Engineering
- Brisbane
- Australia
| | - João C. Diniz da Costa
- The University of Queensland
- FIMLab – Films and Inorganic Membrane Laboratory
- School of Chemical Engineering
- Brisbane
- Australia
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185
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Ray S, Das P, Banerjee B, Bhaumik A, Mukhopadhyay C. Piperazinylpyrimidine modified MCM-41 for the ecofriendly synthesis of benzothiazoles by the simple cleavage of disulfide in the presence of molecular O2. RSC Adv 2015. [DOI: 10.1039/c5ra14894d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Synthesis of benzothiazoles by metal free cleavage of disulfide bond.
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Affiliation(s)
- Suman Ray
- Department of Chemistry
- University of Calcutta
- Kolkata -700009
- India
| | - Paramita Das
- Department of Chemistry
- University of Calcutta
- Kolkata -700009
- India
| | - Biplab Banerjee
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Asim Bhaumik
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
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186
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El Kadib A. Chitosan as a sustainable organocatalyst: a concise overview. CHEMSUSCHEM 2015; 8:217-244. [PMID: 25470553 DOI: 10.1002/cssc.201402718] [Citation(s) in RCA: 127] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 09/20/2014] [Indexed: 06/04/2023]
Abstract
Increased demand for more sustainable materials and chemical processes has tremendously advanced the use of polysaccharides, which are natural biopolymers, in domains such as adsorption, catalysis, and as an alternative chemical feedstock. Among these biopolymers, the use of chitosan, which is obtained by deacetylation of natural chitin, is on the increase due to the presence of amino groups on the polymer backbone that makes it a natural cationic polymer. The ability of chitosan-based materials to form open-network, macroporous, high-surface-area hydrogels with accessible basic surface sites has enabled their use not only as macrochelating ligands for active metal catalysts and as a support to disperse nanosized particles, but also as a direct organocatalyst. This review provides a concise overview of the use of native and modified chitosan, possessing different textural properties and chemical properties, as organocatalysts. Organocatalysis with chitosan is primarily focused on carbon-carbon bond-forming reactions, multicomponent heterocycle formation reactions, biodiesel production, and carbon dioxide fixation through [3+2] cycloaddition. Furthermore, the chiral, helical organization of the chitosan skeleton lends itself to use in enantioselective catalysis. Chitosan derivatives generally display reactivity similar to homogeneous bases, ionic liquids, and organic and inorganic salts. However, the introduction of cooperative acid-base interactions at active sites substantially enhances reactivity. These functional biopolymers can also be easily recovered and reused several times under solvent-free conditions. These accomplishments highlight the important role that natural biopolymers play in furthering more sustainable chemistry.
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Affiliation(s)
- Abdelkrim El Kadib
- Euro-Med Research Institute, Engineering Division, Euro-Mediterranean University of Fes (UEMF), Fès Shore, Route de Sidi Hrazem, 30070 Fès (Morocco).
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187
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Ge T, Hua Z, Zhu Y, Song Y, Tao G, Zhou X, Chen L, Ren W, Yao H, Shi J. Amine-modified hierarchically structured zeolites as acid–base bi-functional catalysts for one-pot deacetalization-Knoevenagel cascade reaction. RSC Adv 2014. [DOI: 10.1039/c4ra11865k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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188
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189
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Zhang F, Wei Y, Wu X, Jiang H, Wang W, Li H. Hollow Zeolitic Imidazolate Framework Nanospheres as Highly Efficient Cooperative Catalysts for [3+3] Cycloaddition Reactions. J Am Chem Soc 2014; 136:13963-6. [DOI: 10.1021/ja506372z] [Citation(s) in RCA: 151] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Fang Zhang
- The
Education Ministry Key Laboratory of Resource Chemistry and Shanghai
Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
- Department of Chemistry & Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
| | - Yongyi Wei
- The
Education Ministry Key Laboratory of Resource Chemistry and Shanghai
Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
- Department of Chemistry & Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
| | - Xiaotao Wu
- The
Education Ministry Key Laboratory of Resource Chemistry and Shanghai
Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
| | - Huangyong Jiang
- The
Education Ministry Key Laboratory of Resource Chemistry and Shanghai
Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
| | - Wei Wang
- Department of Chemistry & Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
| | - Hexing Li
- The
Education Ministry Key Laboratory of Resource Chemistry and Shanghai
Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
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190
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Goyal R, Sarkar B, Lucus N, Bordoloi A. Acid-Base Cooperative Catalysis over Mesoporous Nitrogen-Rich Carbon. ChemCatChem 2014. [DOI: 10.1002/cctc.201402537] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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191
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Li H, Bhadury PS, Riisager A, Yang S. One-pot transformation of polysaccharides via multi-catalytic processes. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00711e] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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192
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Dhakshinamoorthy A, Garcia H. Cascade reactions catalyzed by metal organic frameworks. CHEMSUSCHEM 2014; 7:2392-2410. [PMID: 25082205 DOI: 10.1002/cssc.201402148] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 04/18/2014] [Indexed: 06/03/2023]
Abstract
Cascade or tandem reactions where two or more individual reactions are carried out in one pot constitute a clear example of process intensification, targeting the maximization of spatial and temporal productivity with mobilization of minimum resources. In the case of catalytic reactions, cascade processes require bi-/multifunctional catalysts that contain different classes of active sites. Herein, we show that the features and properties of metal-organic frameworks (MOFs) make these solids very appropriate materials for the development of catalysts for cascade reactions. Due to composition and structure, MOFs can incorporate different types of sites at the metal nodes, organic linkers, or at the empty internal pores, allowing the flexible design and synthesis of multifunctional catalysts. After some introductory sections on the relevance of cascade reactions from the point of view of competitiveness, sustainability, and environmental friendliness, the main part of the text provides a comprehensive review of the literature reporting the use of MOFs as heterogeneous catalysts for cascade reactions including those that combine in different ways acid/base, oxidation/reduction, and metal-organic centers. The final section summarizes the current state of the art, indicating that the development of a first commercial synthesis of a high-added-value fine chemical will be a crucial milestone in this area.
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Affiliation(s)
- Amarajothi Dhakshinamoorthy
- Centre for Green Chemistry Processes, School of Chemistry, Madurai Kamaraj University, Tamil Nadu, 625 021 (India).
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193
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194
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Song Y, Cheng C, Jing H. Aza-Crown Ether Complex Cation Ionic Liquids: Preparation and Applications in Organic Reactions. Chemistry 2014; 20:12894-900. [DOI: 10.1002/chem.201403118] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Indexed: 11/10/2022]
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195
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Aqil A, El Kadib A, Aqil M, Bousmina M, Elidrissi A, Detrembleur C, Jérôme C. Nitroaldol condensation catalyzed by topologically modulable cooperative acid–base chitosan–TiO2hybrid materials. RSC Adv 2014. [DOI: 10.1039/c4ra04590d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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196
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An Z, Guo Y, Zhao L, Li Z, He J. l-Proline-Grafted Mesoporous Silica with Alternating Hydrophobic and Hydrophilic Blocks to Promote Direct Asymmetric Aldol and Knoevenagel–Michael Cascade Reactions. ACS Catal 2014. [DOI: 10.1021/cs500385s] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhe An
- State Key Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Ying Guo
- State Key Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Liwei Zhao
- State Key Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Zhi Li
- State Key Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Jing He
- State Key Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
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197
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Dalmoro V, dos Santos J, Armelin E, Alemán C, Azambuja D. Sol–gel hybrid films based on organosilane and montmorillonite for corrosion inhibition of AA2024. J Colloid Interface Sci 2014; 426:308-13. [DOI: 10.1016/j.jcis.2014.04.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 04/07/2014] [Accepted: 04/10/2014] [Indexed: 11/28/2022]
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198
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Abstract
Catalysis plays a key role in chemical production, energy processing, air purification, water treatment, food processing, and the life sciences. Nanostructured materials with high surface areas and some unique properties have received widespread interest in electrocatalysis and photocatalysis. Recently, the author’s research team has designed and studied a variety of novel functional nanomaterials. This review article is derived from the author’s 2013 Canadian Catalysis Lectureship Award Lecture and focuses primarily on the electrocatalytic activities of platinum- and palladium-based nanomaterials and the development of TiO2-based nanostructured photocatalysts. Palladium possesses several exceptional properties that may enable promising applications in hydrogen detection, purification, and storage. The significant roles of palladium-based nanomaterials in facilitating the growth of a hydrogen economy are addressed. As platinum-based catalysts are vital to the development of fuel cells and sensors, the design of high-performance platinum-based electrocatalysts is highlighted. Additionally, TiO2 is considered to be one of the most promising photocatalysts due to its nontoxicity, high stability, and cost effectiveness. The modification of TiO2 nanomaterials to achieve visible light response is discussed as well. It is anticipated that the development of advanced functional nanostructured catalysts will further improve the efficiency and reduce the cost of electrochemical and photochemical processes, making them more attractive in addressing the pressing global energy and environmental issues.
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Affiliation(s)
- Aicheng Chen
- Department of Chemistry, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada
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199
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Enantioselective Heterogeneous Synergistic Catalysis for Asymmetric Cascade Transformations. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400291] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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200
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Zhang Y, Li B, Ma S. Dual functionalization of porous aromatic frameworks as a new platform for heterogeneous cascade catalysis. Chem Commun (Camb) 2014; 50:8507-10. [DOI: 10.1039/c4cc04012k] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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