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Ding Y, Schlögl R, Heumann S. The Role of Supported Atomically Distributed Metal Species in Electrochemistry and How to Create Them. ChemElectroChem 2019. [DOI: 10.1002/celc.201900598] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yuxiao Ding
- Max Planck Institute for Chemical Energy ConversionDepartment of Heterogeneous Reactions Stiftststraße 34–36 Mülheim an der Ruhr 45470
| | - Robert Schlögl
- Max Planck Institute for Chemical Energy ConversionDepartment of Heterogeneous Reactions Stiftststraße 34–36 Mülheim an der Ruhr 45470
| | - Saskia Heumann
- Max Planck Institute for Chemical Energy ConversionDepartment of Heterogeneous Reactions Stiftststraße 34–36 Mülheim an der Ruhr 45470
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A tetranuclear pyrophosphate-bridged Cu(II) complex with 4,4′-bipyridine and 1,10-phenanthroline: Synthesis, structural, and magnetic properties. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2017.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Affiliation(s)
- Robert Schlögl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
- Max Planck Institute for Chemical Energy Conversion; Stiftstr. 34-36 45470 Mülheim an der Ruhr Germany
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Abstract
A heterogeneous catalyst is a functional material that continually creates active sites with its reactants under reaction conditions. These sites change the rates of chemical reactions of the reactants localized on them without changing the thermodynamic equilibrium between the materials.
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Affiliation(s)
- Robert Schlögl
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin (Germany) http://www.fhi-berlin.mpg.de http://www.cec.mpg.de; Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim a.d. Ruhr (Germany).
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Park J, Feng D, Yuan S, Zhou H. Photochromic Metal–Organic Frameworks: Reversible Control of Singlet Oxygen Generation. Angew Chem Int Ed Engl 2014; 54:430-5. [DOI: 10.1002/anie.201408862] [Citation(s) in RCA: 269] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Jihye Park
- Department of Chemistry, Texas A&M University, College Station, TX 77843 (USA) http://www.chem.tamu.edu/rgroup/zhou/
| | - Dawei Feng
- Department of Chemistry, Texas A&M University, College Station, TX 77843 (USA) http://www.chem.tamu.edu/rgroup/zhou/
| | - Shuai Yuan
- Department of Chemistry, Texas A&M University, College Station, TX 77843 (USA) http://www.chem.tamu.edu/rgroup/zhou/
| | - Hong‐Cai Zhou
- Department of Chemistry, Texas A&M University, College Station, TX 77843 (USA) http://www.chem.tamu.edu/rgroup/zhou/
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Park J, Feng D, Yuan S, Zhou H. Photochromic Metal–Organic Frameworks: Reversible Control of Singlet Oxygen Generation. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408862] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jihye Park
- Department of Chemistry, Texas A&M University, College Station, TX 77843 (USA) http://www.chem.tamu.edu/rgroup/zhou/
| | - Dawei Feng
- Department of Chemistry, Texas A&M University, College Station, TX 77843 (USA) http://www.chem.tamu.edu/rgroup/zhou/
| | - Shuai Yuan
- Department of Chemistry, Texas A&M University, College Station, TX 77843 (USA) http://www.chem.tamu.edu/rgroup/zhou/
| | - Hong‐Cai Zhou
- Department of Chemistry, Texas A&M University, College Station, TX 77843 (USA) http://www.chem.tamu.edu/rgroup/zhou/
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Application of nickel phosphate nanoparticles and VSB-5 in the modification of carbon paste electrode for electrocatalytic oxidation of methanol. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2059-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Samadi-Maybodi A, Nejad-Darzi SKH. Phase-selective crystallization of nickel phosphate VSB-5 with (2-hydroxyethyl) trimethylammonium hydroxide as template. CRYSTAL RESEARCH AND TECHNOLOGY 2011. [DOI: 10.1002/crat.201000704] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Ikotun OF, Higbee EM, Ouellette W, Lloret F, Julve M, Doyle RP. Synthesis, Structural, Magnetic and Thermal Characterization of {[Cu(bipy)]2(μ-HP2O7)(μ-Cl)}·H2O. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800617] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Flannigan D, Lobastov V, Zewail A. Controlled Nanoscale Mechanical Phenomena Discovered with Ultrafast Electron Microscopy. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200704147] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Flannigan D, Lobastov V, Zewail A. Controlled Nanoscale Mechanical Phenomena Discovered with Ultrafast Electron Microscopy. Angew Chem Int Ed Engl 2007; 46:9206-10. [DOI: 10.1002/anie.200704147] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ikotun OF, Armatus NG, Julve M, Kruger PE, Lloret F, Nieuwenhuyzen M, Doyle RP. Synthesis and Structural and Magnetic Characterization of {[(phen)2Ni]2(μ-P2O7)}·27H2O and {[(phen)2Mn]2(μ-P2O7)}·13H2O: Rare Examples of Coordination Complexes with the Pyrophosphate Ligand. Inorg Chem 2007; 46:6668-74. [PMID: 17636894 DOI: 10.1021/ic700439a] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction in water of M(II) [M = Ni or Mn] with 1,10-phenanthroline (phen) and sodium pyrophosphate (Na4P2O7) in a 2:4:1 stoichiometry resulted in the crystallization of dinuclear complexes featuring the heretofore rare bridging pyrophosphate. Single-crystal X-ray diffraction studies revealed the complexes to be {[(phen)2Ni]2(micro-P2O7)} . 27H2O (1) and {[(phen)2Mn]2(micro-P2O7)} . 13H2O (2) where the asymmetric M(phen)2 units are bridged by bis-bidentate pyrophosphate, each metal ion exhibiting a distorted octahedral geometry. The bridging pyrophosphate places adjacent metal centers at 5.031 A in 1 and 4.700 A in 2, and its conformation also gives rise to an intramolecular pi-pi interaction between two adjacent phen ligands. Intermolecular pi-pi interactions between phen ligands from adjacent dinuclear complexes create an ornate 3D network in 1, whereas a 2D sheet results in 2. The hydrophilic nature of the pyrophosphate ligand leads to heavy hydration with the potential solvent-accessible area for 1 and 2 accounting for 45.7% and 26.4% of their unit cell volumes, respectively. Variable-temperature magnetic susceptibility measurements on polycrystalline samples of 1 and 2 revealed net weak intramolecular antiferromagnetic coupling between metal centers in both compounds with J = -3.77 cm(-1) in 1 and J = -0.88 cm(-1) in 2, the Hamiltonian being defined as H = -JSA.SB. The ability of the bis-bidentate pyrophosphate to mediate magnetic interactions between divalent first row transition metal ions is discussed bearing in mind the number and nature of the interacting magnetic orbitals.
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Affiliation(s)
- Oluwatayo F Ikotun
- Department of Chemistry, Syracuse University, Syracuse, NY 13244-4100, USA
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Grotjahn DB. Bifunctional Organometallic Catalysts Involving Proton Transfer or Hydrogen Bonding. Chemistry 2005; 11:7146-53. [PMID: 16086334 DOI: 10.1002/chem.200500253] [Citation(s) in RCA: 125] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Inspired by the cooperativity displayed by metalloenzymes, bifunctional organometallic complexes featuring pendant basic functional groups are designed and evaluated as catalysts in reactions for which enzymes are not suited. Anti-Markovnikov hydration of terminal alkynes is the focus, as are hydrogen bonding and proton transfer facilitated by the pendant groups.
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Affiliation(s)
- Douglas B Grotjahn
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-1030, USA.
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Abstract
Intellectually, the advantages that flow from the availability of single-site heterogeneous catalysts (SSHC) are many. They facilitate the determination of the kinetics and mechanism of catalytic turnover-both experimentally and computationally-and make accessible the energetics of various intermediates (including short-lived transition states). These facts in turn offer a rational strategic principle for the design of new catalysts and the improvement of existing ones. It is generally possible to prepare soluble molecular fragments that circumscribe the single-site, thus enabling a direct comparison to be made, experimentally, between the catalytic performance of the same active site when functioning as a heterogeneous (continuous solid) as well as a homogeneous (dispersed molecular) catalyst. This approach also makes it possible to modify the immediate atomic environment as well as the central atomic structure of the active site. From the practical standpoint, SSHC exhibit very high selectivities leading to the production of sharply defined molecular products, just as do their homogeneous analogues. Given that mesoporous silicas with very large internal surface areas are ideal supports for SSHC, and that more than a quarter of the elements of the Periodic Table may be grafted as active sites onto such silicas, there is abundant scope for creating new catalytic opportunities.
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Affiliation(s)
- John Meurig Thomas
- Royal Institution of Great Britain, Davy Faraday Research Laboratory, 21 Albemarle Street, London W1S 4BS, UK.
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Synthesis, Crystal Structure, and Magnetic Properties of a Three-Dimensional Hydroxide Sulfate: Mn5(OH)8SO4. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200500112] [Citation(s) in RCA: 8] [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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Koszinowski K, Schröder D, Schwarz H. Reactivity of Small Cationic Platinum Clusters. J Phys Chem A 2003. [DOI: 10.1021/jp027713j] [Citation(s) in RCA: 110] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Konrad Koszinowski
- Institut für Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - Detlef Schröder
- Institut für Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - Helmut Schwarz
- Institut für Chemie der Technischen Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
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Wang K, Yu J, Song Y, Xu R. Assembly of one-dimensional AlP2O83−chains into three-dimensional MAlP2O8·C2N2H9frameworks through transition metal cations (M = Ni2+, Co2+and Fe2+). Dalton Trans 2003. [DOI: 10.1039/b207142h] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Guillou N, Gao Q, Forster PM, Chang JS, Noguès M, Park SE, Férey G, Cheetham AK. Nickel(II) Phosphate VSB-5: A Magnetic Nanoporous Hydrogenation Catalyst with 24-Ring Tunnels. Angew Chem Int Ed Engl 2001; 40:2831-2834. [DOI: 10.1002/1521-3773(20010803)40:15<2831::aid-anie2831>3.0.co;2-z] [Citation(s) in RCA: 289] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2001] [Indexed: 11/07/2022]
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Guillou N, Gao Q, Forster PM, Chang JS, Noguès M, Park SE, Férey G, Cheetham AK. Nickel(II) Phosphate VSB-5: A Magnetic Nanoporous Hydrogenation Catalyst with 24-Ring Tunnels. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010803)113:15<2913::aid-ange2913>3.0.co;2-p] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Chakraborty D, Horchler S, Krätzner R, Varkey SP, Pinkas J, Roesky HW, Usón I, Noltemeyer M, Schmidt HG. Synthesis and Structural Characterization of Functionalized Dimeric Aluminophosphonates and a Monomeric Gallophosphonate Anion. Inorg Chem 2001; 40:2620-4. [PMID: 11350243 DOI: 10.1021/ic000797v] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reaction of t-BuP(O)(OSiMe(3))(OH) with Me(3)Al leads to the formation of [Me(2)Al(mu-O)(2)P(OSiMe(3))(t-Bu)](2) (1) whereas Me(2)AlCl reacts with Ph(2)P(O)(OH) to yield [(Cl)(Me)Al(mu-O)(2)PPh(2)](2) (2). These compounds represent the first examples of functionalized dimeric four-ring type aluminophosphonate systems. The double four-ring type gallophosphonate, namely, [t-BuPO(3)GaMe](4), reacts with n-Bu(4)NHF(2) under ambient conditions, resulting in the formation of a monomeric gallophosphonate [n-Bu(4)N][MeGa[t-BuPO(2)(OH)](3)] (3). These derivatives have been adequately characterized using various spectroscopic techniques and X-ray diffraction studies.
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Affiliation(s)
- D Chakraborty
- Institut für Anorganische Chemie der Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
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Harris KDM, Tremayne M, Kariuki BM. Contemporary Advances in the Use of Powder X-Ray Diffraction for Structure Determination. Angew Chem Int Ed Engl 2001; 40:1626-1651. [PMID: 11353468 DOI: 10.1002/1521-3773(20010504)40:9<1626::aid-anie16260>3.0.co;2-7] [Citation(s) in RCA: 170] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Many crystalline solids cannot be prepared in the form of single crystals of sufficient size and/or quality for investigation using single-crystal X-ray diffraction techniques, and the opportunity to carry out structure determination using powder diffraction data is therefore essential to understand the structural properties of such materials. Although the refinement stage of the structure determination process can be carried out fairly routinely from powder diffraction data using the Rietveld profile refinement technique, solving crystal structures directly from powder data is associated with several intrinsic difficulties. Nevertheless, substantial progress has been made in recent years in the scope and potential of techniques in this field. This article aims to highlight the types of structural problems for which structure determination may now be tackled directly from powder diffraction data, and contemporary applications across several chemical disciplines are presented. A brief survey of the underlying methodologies is given, with some emphasis on recently developed techniques for carrying out the structure-solution stage of the structure-determination process.
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Chakraborty D, Horchler S, Roesky HW, Noltemeyer M, Schmidt HG. Application of n-Bu4NHF2 as a fluorinating agent for the preparation of fluoroanions: synthesis and crystal structure of the anions [t-BuPO3AlF2]2(2-), [PhPO3AlF2]2(2-), and [(O-i-Pr)3Ti(mu-F)2(mu-O-i-Pr)Ti(O-i-Pr)3]-. Inorg Chem 2000; 39:3995-8. [PMID: 11198852 DOI: 10.1021/ic991453b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first phosphonate anions of aluminum-containing fluorine and an anionic bridged fluoroalkoxy derivative of titanium have been realized using n-Bu4NHF2 as a fluorinating agent in organometallic synthesis. Reactions of [RPO3AlMe]4 [R = Ph (1), t-Bu] with n-Bu4NHF2 yield organic-soluble compounds of the type [n-Bu4N]2[RPO3AlF2]2 [R = Ph (2), t-Bu (3)], whereas the reaction of Ti(O-i-Pr)4 with n-Bu4NHF2 results in the formation of [n-Bu4N][O-i-Pr)3Ti(mu-F)2(mu-O-i-Pr)Ti(O-i-Pr)3] (4). These compounds have been obtained in high yields and have been adequately characterized through spectroscopic techniques and X-ray diffraction studies.
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Affiliation(s)
- D Chakraborty
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, D 37077 Göttingen, Germany
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Adair BA, Díaz de Delgado G, Delgado JM, Cheetham AK. Synthesis and Characterization of an Open-Framework Antimony(III) Phosphate: [H3N(CH2)2NH3]1.5[(SbO)2(SbF)2(PO4)3]. Angew Chem Int Ed Engl 2000. [DOI: 10.1002/(sici)1521-3757(20000218)112:4<761::aid-ange761>3.0.co;2-b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Otero Areán C, Tsyganenko A, Escalona Platero E, Garrone E, Zecchina A. Zwei Koordinationsweisen von CO in Zeolithen: ein temperaturabhängiges Gleichgewicht. Angew Chem Int Ed Engl 1998. [DOI: 10.1002/(sici)1521-3757(19981116)110:22<3350::aid-ange3350>3.0.co;2-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Schubert US, Kersten JL, Pemp AE, Eisenbach CD, Newkome GR. A New Generation of 6,6′-Disubstituted 2,2′-Bipyridines: Towards NovelOligo(bipyridine) Building Blocks for Potential Applications in Materials Science and Supramolecular Chemistry. European J Org Chem 1998. [DOI: 10.1002/(sici)1099-0690(199811)1998:11<2573::aid-ejoc2573>3.0.co;2-i] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Yang Y, Pinkas J, Schäfer M, Roesky HW. Ein molekulares Modell für Alumophosphate mit Fluorid als strukturdirigierendem und mineralisierendem Agens. Angew Chem Int Ed Engl 1998. [DOI: 10.1002/(sici)1521-3757(19981002)110:19<2795::aid-ange2795>3.0.co;2-l] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Durch Redox-Molekularsiebe vermittelte oxidative Umwandlungen organischer Verbindungen. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971091104] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ernst S. Selektive Katalyse durch die äußere Oberfläche von Zeolithkristallen—ein neues Konzept. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961080107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Eine neue Strategie in der heterogenen Katalyse: das Design von Cortex-Katalysatoren. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951072348] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Vanoppen DL, De Vos DE, Genet MJ, Rouxhet PG, Jacobs PA. Cobalthaltige Molekularsiebe als Katalysatoren für die Autoxidation von Cyclohexan bei geringem Umsatz. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951070522] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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