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Acikalin H, Ziegler F, Wang D, Buchmeiser MR. A Hard Templating Approach to Functional Mesoporous Poly(norborn‐2‐ene)‐Based Monolithic Supports. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hande Acikalin
- Institute of Polymer Chemistry University of Stuttgart Pfaffenwaldring 55 Stuttgart D‐70569 Germany
| | - Felix Ziegler
- Institute of Polymer Chemistry University of Stuttgart Pfaffenwaldring 55 Stuttgart D‐70569 Germany
| | - Dongren Wang
- Institute of Polymer Chemistry University of Stuttgart Pfaffenwaldring 55 Stuttgart D‐70569 Germany
| | - Michael R. Buchmeiser
- Institute of Polymer Chemistry University of Stuttgart Pfaffenwaldring 55 Stuttgart D‐70569 Germany
- German Institutes of Textile and Fiber Research (DITF) Denkendorf Körschtalstr. 26 Denkendorf D‐73770 Germany
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Al-Hashimi M, Tuba R, Bazzi HS, Grubbs RH. Synthesis of Polypentenamer and Poly(Vinyl Alcohol) with a Phase-Separable Polyisobutylene-Supported Second-Generation Hoveyda-Grubbs Catalyst. ChemCatChem 2015. [DOI: 10.1002/cctc.201500930] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mohammed Al-Hashimi
- Department of Chemistry; Texas A&M University at Qatar; P.O. Box 23874 Doha Qatar
| | - Robert Tuba
- Department of Chemistry; Texas A&M University at Qatar; P.O. Box 23874 Doha Qatar
| | - Hassan S. Bazzi
- Department of Chemistry; Texas A&M University at Qatar; P.O. Box 23874 Doha Qatar
| | - Robert H. Grubbs
- Department of Chemistry; Texas A&M University at Qatar; P.O. Box 23874 Doha Qatar
- The Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena California 91125 USA
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Autenrieth B, Willig F, Pursley D, Naumann S, Buchmeiser MR. Ionically Tagged Ru-Alkylidenes for Metathesis Reactions under Biphasic Liquid-Liquid Conditions. ChemCatChem 2013. [DOI: 10.1002/cctc.201300199] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Vougioukalakis GC. Removing Ruthenium Residues from Olefin Metathesis Reaction Products. Chemistry 2012; 18:8868-80. [DOI: 10.1002/chem.201200600] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Bandari R, Buchmeiser MR. Ring-opening metathesis polymerization-derived large-volume monolithic supports for reversed-phase and anion-exchange chromatography of biomolecules. Analyst 2012; 137:3271-7. [PMID: 22673214 DOI: 10.1039/c2an35193e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Preparative-scale monolithic columns up to 433.5 mL in volume were prepared via transition metal-catalyzed ring-opening metathesis polymerization (ROMP) from norborn-2-ene (NBE) and trimethylolpropane-tris(5-norbornene-2-carboxylate) (CL) using the 1(st)-generation Grubbs initiator RuCl(2)(PCy(3))(2)(CHPh) (Cy = cyclohexyl) (1) in the presence of a macro- and microporogen, i.e. of 2-propanol and toluene. To prepare large-volume monoliths, bulk polymerizations were completed within borosilicate or PEEK column formats with diameters in the range of 3 to 49 mm. The pore structure of the large-volume monoliths was investigated by electron microscopy and inverse-size exclusion chromatography (ISEC), respectively. Monolithic columns with inner diameters (I.D.s) in the range of 10-49 mm were tested for the separation of a mixture of five proteins, i.e., insulin, cytochrome C, lysozyme, conalbumin, and β-lactoglobulin. Preparative separation of these proteins was achieved within less than 12 min in a 433.5 mL monolithic column by applying gradient elution in the RP-HPLC mode. Furthermore, weak and strong anion exchangers were prepared via post-synthesis grafting of bicyclo[2.2.1]hept-5-en-2-yl-methyl-N,N-dimethylammonium hydrochloride (4) and bicyclo[2.2.1]hept-5-en-2-ylmethyl-N,N,N-trimethylammonium iodide (5), respectively. The weak and strong anion exchangers were used for the preparative-scale separation of 5'-phosphorylated oligodeoxythymidylic acid fragments of d[pT](12-18) at pH values ranging from 5 to 9.
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Affiliation(s)
- Rajendar Bandari
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Institut für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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Mayr M, Mayr B, Buchmeiser MR. Novel well-defined heterogeneous metathesis catalysts. Des Monomers Polym 2012. [DOI: 10.1163/156855502760158015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Anderson EB, Buchmeiser MR. Catalysts Immobilized on Organic Polymeric Monolithic Supports: From Molecular Heterogeneous Catalysis to Biocatalysis. ChemCatChem 2011. [DOI: 10.1002/cctc.201100086] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ring-opening metathesis polymerization-derived monolithic anion exchangers for the fast separation of double-stranded DNA fragments. J Chromatogr A 2011; 1218:2362-7. [DOI: 10.1016/j.chroma.2010.08.053] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 08/20/2010] [Accepted: 08/24/2010] [Indexed: 11/22/2022]
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Lubbad SH, Bandari R, Buchmeiser MR. Ring-opening metathesis polymerization-derived monolithic strong anion exchangers for the separation of 5'-phosphorylated oligodeoxythymidylic acids fragments. J Chromatogr A 2011; 1218:8897-902. [PMID: 21450301 DOI: 10.1016/j.chroma.2011.03.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Revised: 03/01/2011] [Accepted: 03/02/2011] [Indexed: 11/18/2022]
Abstract
Ring-opening metathesis polymerization (ROMP) derived monoliths were prepared from 5-norborn-2-enemethyl bromide (NBE-CH(2)Br) and tris(5-norborn-2-enemethoxy)methylsilane ((NBE-CH(2)O)(3)SiCH(3)) within the confines of surface-silanized borosilicate columns (100 mm × 3 mm I.D.), applying Grubbs' first generation benzylidene-type catalyst [RuCl(2)(PCy(3))(2)(CHPh)]. Two monoliths of the same recipe were converted into strong anion-exchangers applying two different approaches. Monolith I was prepared by a two-step reaction of the poly(NBE-CH(2)-Br) moieties with diethyl amine forming a weak-anion exchanger followed by reaction (quaternization) with ethyl iodide. Monolith II was prepared via a single-step reaction of the poly(NBE-CH(2)-Br) moieties with triethyl amine. The resulting monolithic anion-exchangers prepared demonstrated a good aptitude for the anion-exchange separation of single-stranded nucleic acids (ss-DNA). However, monolith II showed superior separation efficiency compared to monolith I indicated by sharper analyte peaks and better resolution values for the 5'-phosphorylated oligodeoxythymidylic acids fragments. On monolith II, the seven fragments of [d(pT)(12-18)] were baseline separated in less than 9 min. The influence of the buffer pH on the separation efficiency was studied applying a phosphate (0.05 mol/L, pH 7 and 8) and Tris-HCl buffer (0.05 mol/L, pH 9), respectively.
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Affiliation(s)
- Said H Lubbad
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Institut für Polymerchemie, Universität Stuttgart, D-70569 Stuttgart, Germany.
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Buchmeiser MR. Ring-Opening Metathesis Polymerization-Derived Materials for Separation Science, Heterogeneous Catalysis and Tissue Engineering. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.201000014] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Beckert S, Stallmach F, Bandari R, Buchmeiser MR. Self-Diffusion of Polystyrene Solutions in Porous Acrylate-Based Monoliths Studied by 1H PFG NMR. Macromolecules 2010. [DOI: 10.1021/ma101992c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Steffen Beckert
- Institut für Experimentelle Physik I, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
| | - Frank Stallmach
- Institut für Experimentelle Physik I, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
| | - Rajendar Bandari
- Institut für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Michael R. Buchmeiser
- Institut für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
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Weichelt F, Frerich B, Lenz S, Tiede S, Buchmeiser MR. Ring-Opening Metathesis Polymerization-Based Synthesis of CaCO(3) Nanoparticle-Reinforced Polymeric Monoliths for Tissue Engineering. Macromol Rapid Commun 2010; 31:1540-5. [PMID: 21567564 DOI: 10.1002/marc.201000317] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2010] [Indexed: 11/10/2022]
Abstract
Porous monolithic materials have been prepared via ring-opening metathesis polymerization from norborn-2-ene and a 7-oxanorborn-2-ene-based cross-linker in the presence of porogenic solvents (i.e., 2-propanol and toluene) and norborn-2-enephosphonate surface-modified CaCO(3) nanoparticles, using the 3(rd) -generation Grubbs-initiator RuCl(2) (Py)(2) (IMesH(2) )(CHPh). The experimental setup and the conditions chosen allowed for the manufacturing of polymeric monoliths characterized by a homogeneous distribution of the inorganic nanoparticles throughout the polymeric monolith. Depending on the nanoparticle content, the macropore diameters could be varied in the 30-120 µm regime. Noteworthy, the addition of nanoparticles did not affect the phase separation-triggered formation of the monolithic matrix nor the meso- and microporosity as evidenced by N(2) -adsorption experiments.
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Affiliation(s)
- Franziska Weichelt
- Leibniz-Institut für Oberflächenmodifizierung e. V. IOM, Permoserstrasse 15, D-04318 Leipzig, Germany
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Löber A, Scheibitz B, Frerich B, Buchmeiser MR. Ring-Opening Metathesis Polymerization-Derived Monolithic Materials: Novel Syntheses and Applications. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/masy.200900037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bandari R, Höche T, Prager A, Dirnberger K, Buchmeiser M. Ring-Opening Metathesis Polymerization Based Pore-Size-Selective Functionalization of Glycidyl Methacrylate Based Monolithic Media: Access to Size-Stable Nanoparticles for Ligand-Free Metal Catalysis. Chemistry 2010; 16:4650-8. [DOI: 10.1002/chem.200902654] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2009] [Revised: 01/13/2010] [Indexed: 11/11/2022]
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Buchmeiser MR, Bandari R, Prager-Duschke A, Löber A, Knolle W. Polymeric Monolithic Media: Synthesis, Pore Size Selective Functionalization and Applications. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/masy.201050115] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Buchmeiser MR. Monolithic biocompatible and biodegradable scaffolds for tissue engineering. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23328] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Scheibitz B, Prager A, Buchmeiser MR. Schrock Catalyst Triggered, Ring-Opening Metathesis Polymerization Based Synthesis of Functional Monolithic Materials. Macromolecules 2009. [DOI: 10.1021/ma9001963] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bettina Scheibitz
- Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstrasse 15, D-04318 Leipzig, Germany, and Institut für Technische Chemie, Universität Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
| | - Andrea Prager
- Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstrasse 15, D-04318 Leipzig, Germany, and Institut für Technische Chemie, Universität Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
| | - Michael R. Buchmeiser
- Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstrasse 15, D-04318 Leipzig, Germany, and Institut für Technische Chemie, Universität Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
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Gatschelhofer C, Mautner A, Reiter F, Pieber TR, Buchmeiser MR, Sinner FM. Ring-opening metathesis polymerization for the preparation of norbornene-based weak cation-exchange monolithic capillary columns. J Chromatogr A 2009; 1216:2651-7. [DOI: 10.1016/j.chroma.2008.11.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2008] [Revised: 10/31/2008] [Accepted: 11/04/2008] [Indexed: 11/30/2022]
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Pawar GM, Bantu B, Weckesser J, Blechert S, Wurst K, Buchmeiser MR. Ring-opening metathesis polymerization-derived, polymer-bound Cu-catalysts for click-chemistry and hydrosilylation reactions under micellar conditions. Dalton Trans 2009:9043-51. [DOI: 10.1039/b909180g] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Löber A, Verch A, Schlemmer B, Höfer S, Frerich B, Buchmeiser M. Monolithic Polymers for Cell Cultivation, Differentiation, and Tissue Engineering. Angew Chem Int Ed Engl 2008; 47:9138-41. [DOI: 10.1002/anie.200801872] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Löber A, Verch A, Schlemmer B, Höfer S, Frerich B, Buchmeiser M. Monolithische Polymere als Trägermaterial für Zellkultivierung, Zelldifferenzierung und Tissue-Engineering. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200801872] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Affiliation(s)
- Michael R. Buchmeiser
- Leibniz-Institut für Oberflächenmodifizierung e. V. (IOM), Permoserstrasse 15, D-04318 Leipzig, Germany and Institut für Technische Chemie, Universität Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
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Beier MJ, Knolle W, Prager-Duschke A, Buchmeiser MR. Post-Synthesis Functionalization of (Meth)acrylate Based Monoliths via Electron Beam Triggered Graft Polymerization. Macromol Rapid Commun 2008. [DOI: 10.1002/marc.200800153] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Buchmeiser MR. Stationary phases for chromatography prepared by ring opening metathesis polymerization. J Sep Sci 2008; 31:1907-22. [DOI: 10.1002/jssc.200800104] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sinner FM, Gatschelhofer C, Mautner A, Magnes C, Buchmeiser MR, Pieber TR. Ring-opening metathesis polymerization-derived monolithic capillary columns for high-performance liquid chromatography. J Chromatogr A 2008; 1191:274-81. [DOI: 10.1016/j.chroma.2008.01.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2007] [Revised: 12/28/2007] [Accepted: 01/04/2008] [Indexed: 11/26/2022]
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Comparative study on the separation behavior of monolithic columns prepared via ring-opening metathesis polymerization and via electron beam irradiation triggered free radical polymerization for proteins. J Chromatogr A 2008; 1191:268-73. [DOI: 10.1016/j.chroma.2007.11.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2007] [Revised: 11/02/2007] [Accepted: 11/07/2007] [Indexed: 11/21/2022]
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Bandari R, Knolle W, Prager-Duschke A, Buchmeiser MR. Ring-Opening Metathesis Polymerization Based Post-Synthesis Functionalization of Electron Beam Curing Derived Monolithic Media. Macromol Rapid Commun 2007. [DOI: 10.1002/marc.200700441] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Bandari R, Elsner C, Knolle W, Kühnel C, Decker U, Buchmeiser MR. Separation behavior of electron-beam curing derived, acrylate-based monoliths. J Sep Sci 2007; 30:2821-7. [DOI: 10.1002/jssc.200700364] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sedláková P, Miksik I, Gatschelhofer C, Sinner FM, Buchmeiser MR. Voltage-assisted capillary LC of peptides using monolithic capillary columns prepared by ring-opening metathesis polymerization. Electrophoresis 2007; 28:2219-22. [PMID: 17607810 DOI: 10.1002/elps.200700125] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We examined the use of monolithic capillary columns prepared via ring-opening metathesis polymerization (ROMP) for peptide separation in voltage-assisted capillary LC (voltage-assisted CLC). In order to demonstrate their potential for peptide separation, ROMP-derived monoliths with RP properties were prepared. The preparation procedure of monoliths was transferred from ROMP monoliths optimized for CLC. ROMP monoliths were synthesized within the confines of 200 microm id fused-silica capillaries with a length of 37 cm. After optimization of the chromatographic conditions, the separation performance was tested using a well-defined set of artificial peptides as well as two peptidic mixtures resulting from a tryptic digest of BSA as well as a collagenase digest of collagen. ROMP monoliths showed comparable performance to other monolithic separation media in voltage-assisted CLC published so far. Therefore, we conclude that by optimizing the composition of the ROMP monoliths as well as by using the controlled manner of their functionalization, ROMP monoliths bear a great potential in CLC and CEC.
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Affiliation(s)
- Pavla Sedláková
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
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Eder K, Huber CG, Buchmeiser MR. Surface-Functionalized, Ring-Opening Metathesis Polymerization-Derived Monoliths for Anion-Exchange Chromatography. Macromol Rapid Commun 2007. [DOI: 10.1002/marc.200700467] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Bandari R, Knolle W, Buchmeiser MR. Preparation, Characterization and Applications of Electron-Beam Curing-Derived Monolithic Materials. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/masy.200750813] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Bandari R, Knolle W, Prager-Duschke A, Gläsel HJ, Buchmeiser MR. Monolithic Media Prepared Via Electron Beam Curing for Proteins Separation and Flow-Through Catalysis. MACROMOL CHEM PHYS 2007. [DOI: 10.1002/macp.200600646] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Schlemmer B, Gatschelhofer C, Pieber TR, Sinner FM, Buchmeiser MR. Poly(cyclooctene)-based monolithic columns for capillary high performance liquid chromatography prepared via ring-opening metathesis polymerization. J Chromatogr A 2006; 1132:124-31. [PMID: 16934281 DOI: 10.1016/j.chroma.2006.07.058] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2006] [Revised: 07/21/2006] [Accepted: 07/25/2006] [Indexed: 11/25/2022]
Abstract
Monolithic columns for capillary HPLC were prepared via ring-opening metathesis polymerization (ROMP) from cis-cyclooctene (COE), tris(cyclooct-4-enyl-1-oxy)methylsilane (CL) as monomers, 2-propanol and toluene as porogens and RuCl(2)(Py)(2)(IMesH(2))(CHC(6)H(5)) (Py=pyridine, IMesH(2)=1,3-dimesityl-4,5-dihydroimidazolin-2-ylidene) as initiator within the confines of 200 microm i.d. fused silica columns. For evaluation of the novel monolithic capillary HPLC columns, a protein standard consisting of six proteins in the molecular weight range of 5800-66000 g/mol, i.e. ribonuclease A, insulin, albumin, lysozyme, myoglobin and beta-lactoglobulin, was used. Reproducibility of synthesis was checked by determining the relative standard deviation (RSD) in retention times (t(R)), which was found to be in the range of 2.9-3.9% for all analytes. Variations in polymer kinetics were realized by adding different amounts of free pyridine and had a significant influence on the monolith's morphology, the backpressure and retention times. On the contrary, variations in monomer content and COE to CL ratio showed only minor changes on these parameters. Long-term stability of 1000 runs at 50 degrees C showed excellent stability of the columns and no significant alteration in separation performance was observed in combination with slightly decreased retention times (approx. 1.6-7.2% for all analytes).
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Affiliation(s)
- Bettina Schlemmer
- Leibniz Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstrasse 15, D-04318 Leipzig, Germany
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Kirschning A, Solodenko W, Mennecke K. Combining Enabling Techniques in Organic Synthesis: Continuous Flow Processes with Heterogenized Catalysts. Chemistry 2006; 12:5972-90. [PMID: 16832800 DOI: 10.1002/chem.200600236] [Citation(s) in RCA: 289] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The concepts article describes enabling techniques (solid-phase assisted synthesis, new reactor design, microwave irradiation and new solvents) in organic chemistry and emphasizes the combination of several of them for creating new synthetic technology platforms. Particular focus is put on the combination of immobilized catalysts as well as biocatalysts with continuous flow processes. In this context, the PASSflow continuous flow technique fulfils both chemical as well as chemical engineering requirements. It combines reactor design with optimized, monolithic solid phases as well as reversible immobilization techniques for performing small as well as large scale synthesis with heterogenized catalysts under continuous flow conditions.
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Affiliation(s)
- Andreas Kirschning
- Institut für Organische Chemie, Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany.
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Denmark SE, Fan Y. Catalytic, enantioselective alpha-additions of isocyanides: Lewis base catalyzed Passerini-type reactions. J Org Chem 2006; 70:9667-76. [PMID: 16292793 DOI: 10.1021/jo050549m] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] The generality of catalytic, enantioselective alpha-additions of isocyanides to aldehydes has been demonstrated (Passerini-type reactions). The catalytic system of silicon tetrachloride and a chiral bisphosphoramide (R,R)-1b provided high yields and good to excellent enantioselectivities for the addition of tert-butyl isocyanide to a wide range of aldehydes (aromatic, heteroaromatic, olefinic, acetylenic, aliphatic). Aqueous workup afforded the alpha-hydroxy tert-butyl amides whereas a low-temperature methanol quench followed by basic workup afforded the alpha-hydroxy methyl esters. The reaction is also successful for other isocyanides, albeit with reduced enantioselectivity. Reaction conditions, particularly the rate of addition of the isocyanide was found to be crucial for good yields and high selectivities.
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Affiliation(s)
- Scott E Denmark
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, USA.
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Bandari R, Prager-Duschke A, Kühnel C, Decker U, Schlemmer B, Buchmeiser MR. Tailored Ring-Opening Metathesis Polymerization Derived Monolithic Media Prepared from Cyclooctene-Based Monomers and Cross-Linkers. Macromolecules 2006. [DOI: 10.1021/ma0609883] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rajendar Bandari
- Leibniz Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstrasse 15, D-04318 Leipzig, Germany, and Institut für Technische Chemie, Universität Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
| | - Andrea Prager-Duschke
- Leibniz Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstrasse 15, D-04318 Leipzig, Germany, and Institut für Technische Chemie, Universität Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
| | - Christa Kühnel
- Leibniz Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstrasse 15, D-04318 Leipzig, Germany, and Institut für Technische Chemie, Universität Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
| | - Ulrich Decker
- Leibniz Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstrasse 15, D-04318 Leipzig, Germany, and Institut für Technische Chemie, Universität Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
| | - Bettina Schlemmer
- Leibniz Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstrasse 15, D-04318 Leipzig, Germany, and Institut für Technische Chemie, Universität Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
| | - Michael R. Buchmeiser
- Leibniz Institut für Oberflächenmodifizierung e.V. (IOM), Permoserstrasse 15, D-04318 Leipzig, Germany, and Institut für Technische Chemie, Universität Leipzig, Linnéstrasse 3, D-04103 Leipzig, Germany
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Buchmeiser MR. Recent Developments in the Surface Modification of Polymers. MONATSHEFTE FUR CHEMIE 2006. [DOI: 10.1007/s00706-006-0496-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Lubbad S, Steiner SA, Fritz JS, Buchmeiser MR. Metathesis polymerization-derived monolithic membranes for solid-phase extraction coupled with diffuse reflectance spectroscopy. J Chromatogr A 2006; 1109:86-91. [PMID: 16360162 DOI: 10.1016/j.chroma.2005.11.082] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2005] [Revised: 11/22/2005] [Accepted: 11/23/2005] [Indexed: 10/25/2022]
Abstract
Novel monolithic disks were prepared via ring opening metathesis polymerization (ROMP) from norborn-2-ene (NBE), a crosslinker, i.e., 1,4,5,8,8a-hexahydro-1,4,4,5,8, exo, endo-dimethanonaphthalene (DMN-H6) and tris(norborn-5-ene-2-ylmethylenoxy)methylsilane, respectively, 2-propanol and toluene (25:25:41:9, all %, w/w) using RuCl2(PCy3)2(CHPh) (Cy=cyclohexyl) as initiator and triphenylphosphine (PPh3) as modulator. Disks 1-2 mm thick were prepared by polymerization in a mold, disks thinner than 1mm were prepared by impregnation of nylon or other porous filters prior to the polymerization step. These disks were evaluated for the preconcentration of iodine and selected organic solutes from dilute aqueous samples by solid-phase extraction (SPE). Quantitative measurement of the extracted solutes was achieved by diffuse-reflectance spectroscopy (DRS) directly on the surface of the disk.
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Affiliation(s)
- Said Lubbad
- Institut für Analytische Chemie und Radiochemie, Universität Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
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41
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Gatschelhofer C, Magnes C, Pieber TR, Buchmeiser MR, Sinner FM. Evaluation of ring-opening metathesis polymerization (ROMP)-derived monolithic capillary high performance liquid chromatography columns. J Chromatogr A 2005; 1090:81-9. [PMID: 16196136 DOI: 10.1016/j.chroma.2005.06.098] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel monolithic capillary HPLC columns were prepared via ring opening metathesis polymerization (ROMP) within the confines of fused silica columns with 200 microm i.d. using norborn-2-ene (NBE), 1,4,4a,5,8,8a-hexahydro-1,4,5,8, exo, endo-dimethanonaphthalene (DMN-H6) as monomers, 2-propanol and toluene as porogens and RuCl2(PCy3)2(CHPh) as initiator. Using the monolithic capillary HPLC columns, different sets of analytes (i.e. standard systems) were used for the evaluation of the monolithic columns: (i) a protein standard consisting of six proteins in the range of 5000-66 000 g/mol, (ii) an insulin-albumin standard, and (iii) a peptide standard obtained from a tryptic digest of cytochrome C. With these three different standard systems the reproducibility of synthesis in terms of separation performance proved to be 1-2% relative standard deviation in tR. Variation of polymerization parameters had a significant influence on the monolithic morphology and therefore separation efficiency and back pressure. The maximum analytical loading capacity of ROMP-derived monolithic capillary columns for albumin was found to be 30-125 ng, depending on the monomer content. Long-term stability studies showed no alteration in separation performance.
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Affiliation(s)
- Christina Gatschelhofer
- Institute of Medical Technologies and Health Management, Joanneum Research, Auenbruggerplatz 20/3, A-8036 Graz, Austria
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Voccia S, Claes M, Jérôme R, Jérôme C. Sequential Electrografting and Ring-Opening Metathesis Polymerization: a Strategy for the Tailoring of Conductive Surfaces. Macromol Rapid Commun 2005. [DOI: 10.1002/marc.200500035] [Citation(s) in RCA: 10] [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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Mayr M, Wang D, Kröll R, Schuler N, Prühs S, Fürstner A, Buchmeiser M. Monolithic Disk-Supported Metathesis Catalysts for Use in Combinatorial Chemistry. Adv Synth Catal 2005. [DOI: 10.1002/adsc.200404197] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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45
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Abstract
The synthesis and properties of metathesis polymerization-derived supports for solid-phase extraction (SPE), for the on-line extraction of metal ions, ion-chromatography, reversed-phase (RP-) chromatography, and chiral chromatography is described. In addition, the metathesis polymerization-based manufacture and derivatization of monolithic supports and their use in the separation of biomolecules such as oligonucleotides, thiooligonucleotides, double-stranded DNA (dsDNA) and proteins will be summarized. Special consideration will be given to important aspects of polymer chemistry and their relevance to the properties of these new supports.
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Affiliation(s)
- Michael R Buchmeiser
- Institut für Analytische Chemie und Radiochemie, Universität Innsbruck, Innrain 52 a, A-6020 Innsbruck, Austria.
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Buchmeiser MR, Lubbad S, Mayr M, Wurst K. Access to silica- and monolithic polymer supported CC-coupling catalysts via ROMP: applications in high-throughput screening, reactor technology and biphasic catalysis. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01291-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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47
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BUCHMEISER MR. Rigid Polymers Prepared by Ring-Opening Metathesis Polymerization. JOURNAL OF CHROMATOGRAPHY LIBRARY 2003. [DOI: 10.1016/s0301-4770(03)80021-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Frenzel U, Nuyken O. Ruthenium-based metathesis initiators: Development and use in ring-opening metathesis polymerization. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/pola.10324] [Citation(s) in RCA: 120] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
This contribution summarizes the latest developments in the area of catalytic supports prepared via ring-opening metathesis polymerization (ROMP). In particular, the synthesis of heterogeneous catalytic systems active in Pd-mediated C-C coupling reactions such as Heck, Sonogashira-Hagihara and Suzuki couplings, as well as in ruthenium-mediated olefin metathesis reactions will be summarized. The general concept for the synthesis of these supports will be outlined in detailed.
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Affiliation(s)
- Michael R Buchmeiser
- Institute of Analytical Chemistry and Radiochemistry, University of Innsbruck, Innrain 52 a, Austria.
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