51
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Mennecke K, Kirschning A. Polyionic polymers--heterogeneous media for metal nanoparticles as catalyst in Suzuki-Miyaura and Heck-Mizoroki reactions under flow conditions. Beilstein J Org Chem 2009; 5:21. [PMID: 19590749 PMCID: PMC2707061 DOI: 10.3762/bjoc.5.21] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2009] [Accepted: 04/28/2009] [Indexed: 11/23/2022] Open
Abstract
The preparation of monolithic polyionic supports which serve as efficient heterogeneous supports for palladium(0) nanoparticles is described. These functionalized polymers were incorporated inside a flow reactor and employed in Suzuki-Miyaura and Heck cross couplings under continuous flow conditions.
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Affiliation(s)
- Klaas Mennecke
- Institut für Organische Chemie and Zentrum für Biomolekulare Wirkstoffe (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, D-30167 Hannover, Germany
| | - Andreas Kirschning
- Institut für Organische Chemie and Zentrum für Biomolekulare Wirkstoffe (BMWZ), Leibniz Universität Hannover, Schneiderberg 1B, D-30167 Hannover, Germany
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52
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Semagina N, Kiwi‐Minsker L. Recent Advances in the Liquid‐Phase Synthesis of Metal Nanostructures with Controlled Shape and Size for Catalysis. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2009. [DOI: 10.1080/01614940802480379] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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53
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Klasovsky F, Claus P, Wolf D. Influence of Preparation Parameters on the Performance of Colloid-derived Oxidic Palladium Catalysts for Selective Hydrogenation of C–C Triple Bonds. Top Catal 2009. [DOI: 10.1007/s11244-008-9173-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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54
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Gorschinski A, Khelashvili G, Schild D, Habicht W, Brand R, Ghafari M, Bönnemann H, Dinjus E, Behrens S. A simple aminoalkyl siloxane-mediated route to functional magnetic metal nanoparticles and magnetic nanocomposites. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b911738e] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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55
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Polymer-Assisted Composites of Trimetallic Nanoparticles with a Three-Layered Core-Shell Structure for Catalyses. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/978-3-540-92233-9_3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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56
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Mayer CR, Dumas E, Sécheresse F. 1,10-Phenanthroline and 1,10-phenanthroline-terminated ruthenium(II) complex as efficient capping agents to stabilize gold nanoparticles: Application for reversible aqueous–organic phase transfer processes. J Colloid Interface Sci 2008; 328:452-7. [DOI: 10.1016/j.jcis.2008.09.041] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2008] [Revised: 09/11/2008] [Accepted: 09/12/2008] [Indexed: 10/21/2022]
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57
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Tripathy SK. Soft-chemical synthesis and photoluminescence studies of poly-(vinyl) alcohol-stabilized (Ag)N±10(N=82–3049) nanoclusters. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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58
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59
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Mennecke K, Cecilia R, Glasnov TN, Gruhl S, Vogt C, Feldhoff A, Vargas ML, Kappe CO, Kunz U, Kirschning A. Palladium(0) Nanoparticles on Glass-Polymer Composite Materials as Recyclable Catalysts: A Comparison Study on their Use in Batch and Continuous Flow Processes. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200700510] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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60
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Araújo NAM, Cadilhe A, Privman V. Morphology of fine-particle monolayers deposited on nanopatterned substrates. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2008; 77:031603. [PMID: 18517391 DOI: 10.1103/physreve.77.031603] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2007] [Indexed: 05/26/2023]
Abstract
We study the effect of the presence of a regular substrate pattern on the irreversible adsorption of nanosized and colloid particles. Deposition of disks of radius r(0) is considered, with the allowed regions for their center attachment at the planar surface consisting of square cells arranged in a square lattice pattern. We study the jammed state properties of a generalized version of the random sequential adsorption model for different values of the cell size, a , and cell-cell separation, b . The model shows a surprisingly rich behavior in the space of the two dimensionless parameters alpha = a / 2r(0) and beta = b / 2r(0) . Extensive Monte Carlo simulations for system sizes of 500 x 500 square lattice unit cells were performed by utilizing an efficient algorithm, to characterize the jammed state morphology.
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Affiliation(s)
- N A M Araújo
- GCEP-Centro de Física da Universidade do Minho, 4710-057 Braga, Portugal
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61
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Selective hydrogenation of cinnamaldehyde catalyzed by palladium nanoparticles immobilized on ionic liquids modified-silica gel. CATAL COMMUN 2008. [DOI: 10.1016/j.catcom.2007.07.012] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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62
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Prashar AK, Hodgkins RP, Kumar R, Nandini Devi R. In situ synthesis of Pt nanoparticles in SBA-15 by encapsulating in modified template micelles: size restricted growth within the mesochannels. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b717991j] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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63
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Electrochemical Observation of Ligand Effects on Oxygen Reduction at Ligand-Stabilized Pt Nanoparticle Electrocatalysts. ACTA ACUST UNITED AC 2008. [DOI: 10.1149/1.2937448] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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64
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Du Y, Toshima N. Low Driving Voltage of Twisted Nematic Liquid Crystal Displays Doped with CdS Nanoparticles. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.2446] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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65
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Shi F, Tse M, Pohl MM, Brückner A, Zhang S, Beller M. Tuning Catalytic Activity between Homogeneous and Heterogeneous Catalysis: Improved Activity and Selectivity of Free Nano-Fe2O3 in Selective Oxidations. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200703418] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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66
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Shi F, Tse M, Pohl MM, Brückner A, Zhang S, Beller M. Tuning Catalytic Activity between Homogeneous and Heterogeneous Catalysis: Improved Activity and Selectivity of Free Nano-Fe2O3 in Selective Oxidations. Angew Chem Int Ed Engl 2007; 46:8866-8. [DOI: 10.1002/anie.200703418] [Citation(s) in RCA: 285] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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67
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Bensebaa F, Farah AA, Wang D, Bock C, Du X, Kung J, Le Page Y. Microwave synthesis of polymer-embedded Pt-Ru catalyst for direct methanol fuel cell. J Phys Chem B 2007; 109:15339-44. [PMID: 16852945 DOI: 10.1021/jp0519870] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Platinum-ruthenium nanoparticles stabilized within a conductive polymer matrix are prepared using microwave heating. Polypyrrole di(2-ethylhexyl) sulfosuccinate, or PPyDEHS, has been chosen for its known electrical conductivity, thermal stability, and solubility in polar organic solvents. A scalable and quick two-step process is proposed to fabricate alloyed nanoparticles dispersed in PPyDEHS. First a mixture of PPyDEHS and metallic precursors is heated in a microwave under reflux conditions. Then the nanoparticles are extracted by centrifugation. Physical characterization by TEM shows that crystalline and monodisperse alloyed nanoparticles with an average size of 2.8 nm are obtained. Diffraction data show that crystallite size is around 2.0 nm. Methanol electro-oxidation data allow us to propose these novel materials as potential candidates for direct methanol fuel cells (DMFC) application. The observed decrease in sulfur content in the polymer upon incorporation of PtRu nanoparticles may have adversely affected the measured catalytic activity by decreasing the conductivity of PPyDEHS. Higher concentration of polymer leads to lower catalyst activity. Design and synthesis of novel conductive polymers is needed at this point to enhance the catalytic properties of these hybrid materials.
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Affiliation(s)
- Farid Bensebaa
- Institute for Chemical Process and Environmental Technology, National Research Council of Canada, 1200 Montreal Road, M-12 Ottawa, Ontario K1A 0R6, Canada.
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68
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Kajita M, Hikosaka K, Iitsuka M, Kanayama A, Toshima N, Miyamoto Y. Platinum nanoparticle is a useful scavenger of superoxide anion and hydrogen peroxide. Free Radic Res 2007; 41:615-26. [PMID: 17516233 DOI: 10.1080/10715760601169679] [Citation(s) in RCA: 200] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Bimetallic nanoparticles consisting of gold and platinum were prepared by a citrate reduction method and complementarily stabilized with pectin (CP-Au/Pt). The percent mole ratio of platinum was varied from 0 to 100%. The CP-Au/Pt were alloy-structured. They were well dispersed in water. The average diameter of platinum nanoparticles (CP-Pt) was 4.7 +/- 1.5 nm. Hydrogen peroxide (H(2)O(2)) was quenched by CP-Au/Pt consisting of more than 50% platinum whereas superoxide anion radical (O(2)(-)) was quenched by any CP-Au/Pt. The CP-Au/Pt quenched these two reactive oxygen species in dose-dependent manners. The CP-Pt is the strongest quencher. The CP-Pt decomposed H(2)O(2) and consequently generated O(2) like catalase. The CP-Pt actually quenched O(2)(-) which was verified by a superoxide dismutase (SOD) assay kit. This quenching activity against O(2)(-) persisted like SOD. Taken together, CP-Pt may be a SOD/catalase mimetic which is useful for medical treatment of oxidative stress diseases.
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Affiliation(s)
- Masashi Kajita
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Chiba, Japan
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69
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Matsushita T, Shiraishi Y, Horiuchi S, Toshima N. Synthesis and Catalysis of Polymer-Protected Pd/Ag/Rh Trimetallic Nanoparticles with a Core–Shell Structure. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.1217] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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70
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Transition-metal nanocluster stabilization for catalysis: A critical review of ranking methods and putative stabilizers. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.08.016] [Citation(s) in RCA: 372] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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71
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Uozumi Y, Nakao R, Rhee H. Development of an amphiphilic resin-dispersion of nanopalladium catalyst: Design, preparation, and its use in aquacatalytic hydrodechlorination and aerobic oxidation. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2006.02.042] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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72
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Nakamura T, Tsukahara Y, Sakata T, Mori H, Kanbe Y, Bessho H, Wada Y. Preparation of Monodispersed Cu Nanoparticles by Microwave-Assisted Alcohol Reduction. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.224] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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73
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Lee H, Habas SE, Kweskin S, Butcher D, Somorjai GA, Yang P. Morphological Control of Catalytically Active Platinum Nanocrystals. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200603068] [Citation(s) in RCA: 179] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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74
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Lee H, Habas SE, Kweskin S, Butcher D, Somorjai GA, Yang P. Morphological Control of Catalytically Active Platinum Nanocrystals. Angew Chem Int Ed Engl 2006; 45:7824-8. [PMID: 17089428 DOI: 10.1002/anie.200603068] [Citation(s) in RCA: 389] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hyunjoo Lee
- Department of Chemistry, University of California, Berkeley, Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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75
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Ikeda S, Ishino S, Harada T, Okamoto N, Sakata T, Mori H, Kuwabata S, Torimoto T, Matsumura M. Ligand-Free Platinum Nanoparticles Encapsulated in a Hollow Porous Carbon Shell as a Highly Active Heterogeneous Hydrogenation Catalyst. Angew Chem Int Ed Engl 2006; 45:7063-6. [PMID: 17009288 DOI: 10.1002/anie.200602700] [Citation(s) in RCA: 312] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shigeru Ikeda
- Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka 560-8531, Japan.
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76
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Ikeda S, Ishino S, Harada T, Okamoto N, Sakata T, Mori H, Kuwabata S, Torimoto T, Matsumura M. Ligand-Free Platinum Nanoparticles Encapsulated in a Hollow Porous Carbon Shell as a Highly Active Heterogeneous Hydrogenation Catalyst. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602700] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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77
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Ott LS, Finke RG. Nanocluster Formation and Stabilization Fundamental Studies: Investigating “Solvent-Only” Stabilization En Route to Discovering Stabilization by the Traditionally Weakly Coordinating Anion BF4- Plus High Dielectric Constant Solvents. Inorg Chem 2006; 45:8382-93. [PMID: 16999438 DOI: 10.1021/ic060876s] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The nanocluster literature contains a wide variety of nanocluster stabilizing agents. In addition to the plethora of putative stabilizing additives, 12 claims appear of "solvent-only" stabilization of transition-metal nanoclusters-a hypothesis that is tested for the first time as part of the present studies. When the two main modes of nanocluster stabilization, electrostatic and steric are considered, "solvent-only" stabilization can only be steric (i.e., is not electrostatic). Solvent-only stabilization would, therefore, require that a strongly coordinated, perhaps even kinetically nonlabile, solvent be present on the nanocluster surface. Hence, an investigation has been conducted into potential sources for the stabilization of prototype Ir(0)n transition-metal nanoclusters prepared from [(1,5-COD)Ir(CH3CN)2][BF4] in five different solvents, with a special focus on the formulation and testing of alternative hypotheses regarding the true source of the nanocluster stabilization in putative solvent-only stabilization conditions. Seven total hypotheses are tested with five being initially ruled out; they are, namely, stabilization by (i) trace chloride (ii), surface hydrides, (iii) scavenged charge, (iv) solvent oxidative addition reactions with the nanocluster surface, or (v) polymerized solvent. This led in turn to two additional main alternative hypotheses: (vi) nanocluster surface ligation by high-donor number solvents (i.e., in the absence of anions) and (vii) nanocluster stabilization by surface-coordination of the traditionally weakly coordinating anion BF(4-). Our results reveal a significant contribution to nanocluster stability from the traditionally weakly coordinating BF(4-) in high dielectric constant solvents, such as propylene carbonate. Literature claims of solvent-only nanocluster stabilization are not supported by our findings. Overall, DLVO (Derjaugin-Landau-Verwey-Overbeek) theory of colloidal stability is supported and found to apply to even traditionally weakly coordinating anions.
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Affiliation(s)
- Lisa Starkey Ott
- Colorado State University, Department of Chemistry, Fort Collins, Colorado 80523, USA
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78
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Yang Y, Wang W, Li J, Mu J, Rong H. Manipulating the Solubility of Gold Nanoparticles Reversibly and Preparation of Water-Soluble Sphere Nanostructure through Micellar-like Solubilization. J Phys Chem B 2006; 110:16867-73. [PMID: 16927974 DOI: 10.1021/jp060892a] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
On the basis of micellar solubilization, a strategy tuning the solubility of gold nanoparticles reversibly was developed. Hydrophobic gold nanoparticles stabilized by octadecylamine (ODA-gold) solubilized in the micellar-like core of poly(vinylpyrrolidone) (PVP) in water to form gold nanoparticles with protective multilayer induced by reduction of interfacial energy. Interestingly, upon redispersing in chloroform, the PVP micellar-like structure can break down and the ODA-gold can be released again. By changing the ratio of PVP/ODA, size-controllable hydrophilic spherical assembly can be prepared. On the basis of the observation of transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR), a reasonable mechanism is interpreted thermodynamically.
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Affiliation(s)
- Yun Yang
- Department of Chemistry, East China University of Science and Technology, Shanghai 200237, P.R. China
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79
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On the kinetics of iridium nanoparticles formation in ionic liquids and olefin hydrogenation. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.molcata.2005.12.002] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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80
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Wilson OM, Knecht MR, Garcia-Martinez JC, Crooks RM. Effect of Pd Nanoparticle Size on the Catalytic Hydrogenation of Allyl Alcohol. J Am Chem Soc 2006; 128:4510-1. [PMID: 16594653 DOI: 10.1021/ja058217m] [Citation(s) in RCA: 233] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a particle size dependence for the rate of hydrogenation of allyl alcohol using 1.3-1.9 nm Pd dendrimer-encapsulated nanoparticle (DEN) catalysts. For particles with diameters of <1.5 nm and containing <147 Pd atoms, the modulation in catalytic activity is due to the electronic properties of the particle. For the larger particles, 1.5-1.9 nm in diameter and containing an average of 147-250 Pd atoms, the size effect is a result of geometrical constraints. Specifically, the hydrogenation reaction is shown to occur preferentially on the face atoms of the larger nanoparticles.
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Affiliation(s)
- Orla M Wilson
- Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station, A5300, Austin Texas 78712-0165, USA
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81
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Qiu J, Zhang H, Liang C, Li J, Zhao Z. Co/CNF Catalysts Tailored by Controlling the Deposition of Metal Colloids onto CNFs: Preparation and Catalytic Properties. Chemistry 2006; 12:2147-51. [PMID: 16389617 DOI: 10.1002/chem.200500960] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Carbon nanofiber-supported Co nanocomposites were prepared by means of a modified ethylene glycol (EG) process, in which the Co salts are reduced in EG and are subsequently deposited onto carbon nanofibers (CNFs). It has been found that the deposition of cobalt colloids onto CNFs can be tailored by simply adjusting the pH of the EG and by heating the mixture of CNFs and colloidal solution at 100 degrees C for some time. The pH value (<7) and the temperature (at least 100 degrees C) for heating the mixture of CNFs and colloidal solution are found to be the key factors for depositing Co particles onto CNFs. The obtained Co/CNFs have a high and homogeneous dispersion of spherical Co metal particles with a narrow size distribution of 10-15 nm with a peak around 13.5 nm; this result is consistent, to a certain degree, with the value of 12.8 nm obtained from the XRD study. The different states of the stabilizer including carboxylates (pH>7) and carboxylic acids (pH<7) as well as the decomposition of carboxylic acids during heat treatment were monitored by using FTIR and UV-visible spectroscopy. On the basis of experimental results, the mechanism of depositing cobalt colloids onto CNFs is also addressed. The as-synthesized Co/CNF catalysts show excellent activity and regioselectivity for the 1-octene hydroformylation.
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Affiliation(s)
- Jieshan Qiu
- Carbon Research Laboratory, Center for Nano Materials & Science, School of Chemical Engineering, State Key Lab of Fine Chemicals, Dalian University of Technology, 158 Zhongshan Road, P.O. Box 49, Dalian 116012, China.
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82
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Astruc D, Lu F, Aranzaes JR. Nanopartikel als regenerierbare Katalysatoren: an der Nahtstelle zwischen homogener und heterogener Katalyse. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200500766] [Citation(s) in RCA: 403] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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83
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Astruc D, Lu F, Aranzaes JR. Nanoparticles as Recyclable Catalysts: The Frontier between Homogeneous and Heterogeneous Catalysis. Angew Chem Int Ed Engl 2005; 44:7852-72. [PMID: 16304662 DOI: 10.1002/anie.200500766] [Citation(s) in RCA: 2074] [Impact Index Per Article: 109.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Interest in catalysis by metal nanoparticles (NPs) is increasing dramatically, as reflected by the large number of publications in the last five years. This field, "semi-heterogeneous catalysis", is at the frontier between homogeneous and heterogeneous catalysis, and progress has been made in the efficiency and selectivity of reactions and recovery and recyclability of the catalytic materials. Usually NP catalysts are prepared from a metal salt, a reducing agent, and a stabilizer and are supported on an oxide, charcoal, or a zeolite. Besides the polymers and oxides that used to be employed as standard, innovative stabilizers, media, and supports have appeared, such as dendrimers, specific ligands, ionic liquids, surfactants, membranes, carbon nanotubes, and a variety of oxides. Ligand-free procedures have provided remarkable results with extremely low metal loading. The Review presents the recent developments and the use of NP catalysis in organic synthesis, for example, in hydrogenation and C--C coupling reactions, and the heterogeneous oxidation of CO on gold NPs.
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Affiliation(s)
- Didier Astruc
- Molecular Nanosciences and Catalysis Group, LCOO, UMR CNRS No5802, Université Bordeaux I, 33405 Talence Cedex, France.
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84
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D'Souza L, Saleh-Subaie J, Richards R. A colloid “digesting” route to novel, thermally stable high surface area ZrO2 and Pd/ZrO2 catalytic materials. J Colloid Interface Sci 2005; 292:476-85. [PMID: 15990106 DOI: 10.1016/j.jcis.2005.06.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2005] [Revised: 06/02/2005] [Accepted: 06/03/2005] [Indexed: 11/23/2022]
Abstract
Zirconia having high thermal stability and high surface area (up to 160 m(2)/g at 700 degrees C) has been prepared by a colloidal "digesting" process. This material having demonstrated high surface areas at elevated temperatures was then applied as a catalyst support. A Pd colloid with diameter of approximately 12 nm has been successfully deposited on the high surface area zirconia material. All systems have been well characterized by TEM, X-ray diffraction, N2 adsorption isotherms, FTIR, elemental analysis and dynamic light scattering techniques. The colloidal Pd particles have been found homogeneously well dispersed in the hydrous zirconia matrix without aggregation. The Pd/ZrO2 catalysts have been screened for cyclohexene and 1-hexene hydrogenation activity and it was found that the catalyst is extremely active.
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Affiliation(s)
- Lawrence D'Souza
- School of Engineering and Science, International University Bremen, Campus Ring 8, Bremen 28759, Germany
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85
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Lana-Villarreal T, Gómez R. Interfacial electron transfer at TiO2 nanostructured electrodes modified with capped gold nanoparticles: The photoelectrochemistry of water oxidation. Electrochem commun 2005. [DOI: 10.1016/j.elecom.2005.08.031] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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86
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Ciardelli F, Pertici P, Vitulli G, Giaiacopi S, Ruggeri G, Pucci A. Catalytic and Optical Behavior of Polymer Embedded Metal Nanoparticles. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/masy.200590017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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87
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A Novel Method to Immobilize Ru Nanoparticles on SBA-15 Firmly by Ionic Liquid and Hydrogenation of Arene. Catal Letters 2005. [DOI: 10.1007/s10562-005-6503-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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88
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Behrens S, Spittel G. A new palladium nanoparticle catalyst on mesoporous silica prepared from a molecular cluster precursor. Dalton Trans 2005:868-73. [PMID: 15726138 DOI: 10.1039/b415665j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A promising approach to the controlled synthesis of supported nanoparticles involves the use of molecular carbonyl clusters as precursors. Molecular metal clusters consist of a defined number of structurally ordered atoms, and active monodisperse metal particles are formed after dispersing the molecules and removing the ligands. An octanuclear palladium cluster precursor with easily displaceable ligands was used to generate palladium nanoparticles on mesoporous MCM-41. The molecular cluster precursor, [Pd8(CO)8(PMe3)7], was directly adsorbed from solution onto MCM-41, followed by gentle thermolysis which yielded small metal nanoparticles. Compared to MCM-41-based catalysts prepared from palladium salts by conventional methods, this cluster-derived palladium catalyst has shown an efficient activity for liquid-phase hydrogenation of alkenes.
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Affiliation(s)
- Silke Behrens
- Institute for Technical Chemistry, Forschungszentrum Karlsruhe, Postfach 3640, 76021 Karlsruhe, Germany.
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89
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90
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91
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Kim J, Kim SS, Kim KH, Jin YH, Hong SM, Hwang SS, Cho BG, Shin DY, Im SS. Applications of telechelic polymers as compatibilizers and stabilizers in polymer blends and inorganic/organic nanohybrids. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.03.038] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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92
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Murayama H, Narushima T, Negishi Y, Tsukuda T. Structures and Stabilities of Alkanethiolate Monolayers on Palladium Clusters As Studied by Gel Permeation Chromatography. J Phys Chem B 2004. [DOI: 10.1021/jp0342125] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Haruno Murayama
- Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, and Department of Photoscience, School of Advanced Sciences, The Graduate University for Advanced Studies, Hayama, Kanagawa 240-0193, Japan
| | - Takashi Narushima
- Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, and Department of Photoscience, School of Advanced Sciences, The Graduate University for Advanced Studies, Hayama, Kanagawa 240-0193, Japan
| | - Yuichi Negishi
- Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, and Department of Photoscience, School of Advanced Sciences, The Graduate University for Advanced Studies, Hayama, Kanagawa 240-0193, Japan
| | - Tatsuya Tsukuda
- Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan, and Department of Photoscience, School of Advanced Sciences, The Graduate University for Advanced Studies, Hayama, Kanagawa 240-0193, Japan
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93
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Marconi G, Pertici P, Evangelisti C, Maria Caporusso A, Vitulli G, Capannelli G, Hoang M, Turney TW. Nanostructured ruthenium on γ-Al2O3 catalysts for the efficient hydrogenation of aromatic compounds. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2003.11.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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94
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Bouchama F, Thathagar MB, Rothenberg G, Turkenburg DH, Eiser E. Self-assembly of a hexagonal phase of wormlike micelles containing metal nanoclusters. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:477-483. [PMID: 15743093 DOI: 10.1021/la035148l] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Stable nanoclusters (approximately 2 nm in diameter) of copper, silver, gold, palladium, and ruthenium coated with hydrophobic coronas are easily trapped in self-assembled "soft crystal" hexagonal phase gels made of water and surfactants. The system's crystal structure and phase behavior are studied in detail. A partial phase diagram showing the hexagonal phase region for the water/SDS/toluene region is presented. High-energy X-ray scattering and cross-polarized optical microscopy experiments show that the clusters are tightly confined within the tubes. The thermal gel-fluid transitions of the hexagonal phase are investigated, and it is shown that the hexagonal phase can melt and recrystallize repeatedly. The melt/gel cycles enable easy trapping of various metal clusters in pre-prepared hexagonal phases. In contrast to spherical micelles, the hexagonal phase doped with metal clusters can grow without limit, basically up to the container walls (Ru-doped soft crystals grew to 0.5 mm over 2 months, forming wormlike tubes that are more than 50 microm long but only 7-10 nm in diameter).
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Affiliation(s)
- Fatima Bouchama
- Chemical Engineering Department, University of Amsterdam, 1018 WV Amsterdam, The Netherlands
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95
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Bensebaa F, Patrito N, Le Page Y, L'Ecuyer P, Wang D. Tunable platinum–ruthenium nanoparticle properties using microwave synthesis. ACTA ACUST UNITED AC 2004. [DOI: 10.1039/b404280h] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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96
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Botha SS, Brijoux W, Brinkmann R, Feyer M, Hofstadt HW, Kelashvili G, Kinge S, Matoussevitch N, Nagabhushana KS, Wen F. A review?How nanoparticles emerged from organometallic chemistry. Appl Organomet Chem 2004. [DOI: 10.1002/aoc.808] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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97
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98
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He J, Ichinose I, Kunitake T, Nakao A, Shiraishi Y, Toshima N. Facile fabrication of Ag-Pd bimetallic nanoparticles in ultrathin TiO(2)-gel films: nanoparticle morphology and catalytic activity. J Am Chem Soc 2003; 125:11034-40. [PMID: 12952485 DOI: 10.1021/ja035970b] [Citation(s) in RCA: 198] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ag-Pd bimetallic nanoparticles were prepared directly in ultrathin TiO(2)-gel films by a stepwise ion-exchange/reduction approach. Ion-exchange sites were created in ultrathin films using Mg(2+) ions as template. Ag(+) ion was then incorporated by ion exchange, and converted into metallic nanoparticles by low-temperature H(2) plasma, regenerating ion-exchange sites. The same procedure was then carried out for Pd(2+) ion, producing Pd-on-Ag bimetallic nanoparticles, as TEM observation and plasmon resonance absorption indicate. By contrast, reversed metal incorporation procedure appeared to give a mixture of individual Ag and Pd nanoparticles, as confirmed by TEM, absorption spectroscopy and X-ray photoelectron spectroscopy. For hydrogenation of methyl acrylate, the catalytic activity of the Pd-on-Ag nanoparticle is 367 times as large as that of commercial Pd black and 1.6 times as large as that of Pd monometallic nanoparticle. The outstanding catalytic activity was explicable by the large fraction of the surface-exposed Pd atoms. The formation process of the bimetallic nanoparticle and their general morphological feature are discussed.
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Affiliation(s)
- Junhui He
- Frontier Research System and Surface Science Division, The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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99
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Vitulli G, Evangelisti C, Pertici P, Caporusso AM, Panziera N, Salvadori P, Faga MG, Manfredotti C, Martra G, Coluccia S, Balerna A, Colonna S, Mobilio S. Supported rhodium nanoparticles in catalysis: the role of stabilizers on catalytic activity and structural features. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(03)00529-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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100
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Affiliation(s)
- Nelli S. Sobal
- Bereich Solarenergieforschung, Hahn-Meitner-Institut Berlin, Glienicker Strasse 100, 14109 Berlin, Germany, Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Am Mühlenberg 1, 14476 Golm, Germany, and UMR SPINTEC, CEA-Grenoble, France
| | - Ursula Ebels
- Bereich Solarenergieforschung, Hahn-Meitner-Institut Berlin, Glienicker Strasse 100, 14109 Berlin, Germany, Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Am Mühlenberg 1, 14476 Golm, Germany, and UMR SPINTEC, CEA-Grenoble, France
| | - Helmuth Möhwald
- Bereich Solarenergieforschung, Hahn-Meitner-Institut Berlin, Glienicker Strasse 100, 14109 Berlin, Germany, Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Am Mühlenberg 1, 14476 Golm, Germany, and UMR SPINTEC, CEA-Grenoble, France
| | - Michael Giersig
- Bereich Solarenergieforschung, Hahn-Meitner-Institut Berlin, Glienicker Strasse 100, 14109 Berlin, Germany, Max-Planck-Institut für Kolloid- und Grenzflächenforschung, Am Mühlenberg 1, 14476 Golm, Germany, and UMR SPINTEC, CEA-Grenoble, France
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