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Single-Site, Organometallic Aluminum Catalysts for the Precise Group Transfer Polymerization of Michael-Type Monomers.
Weger, Michael; Giuman, Marco M; Knaus, Maximilian G; Ackermann, Maximilian; Drees, Markus; Hornung, Julius; Altmann, Philipp J; Fischer, Roland A; Rieger, Bernhard.
Afiliação
  • Weger M; Catalysis Research Center & WACKER-Chair of Macromolecular Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching bei München, Germany.
  • Giuman MM; Catalysis Research Center & WACKER-Chair of Macromolecular Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching bei München, Germany.
  • Knaus MG; Catalysis Research Center & WACKER-Chair of Macromolecular Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching bei München, Germany.
  • Ackermann M; Catalysis Research Center & WACKER-Chair of Macromolecular Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching bei München, Germany.
  • Drees M; Catalysis Research Center &, Chair of Inorganic and Metal-Organic Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching bei München, Germany.
  • Hornung J; Catalysis Research Center &, Chair of Inorganic and Metal-Organic Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching bei München, Germany.
  • Altmann PJ; Catalysis Research Center &, Chair of Inorganic and Metal-Organic Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching bei München, Germany.
  • Fischer RA; Catalysis Research Center &, Chair of Inorganic and Metal-Organic Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching bei München, Germany.
  • Rieger B; Catalysis Research Center & WACKER-Chair of Macromolecular Chemistry, Technical University of Munich, Lichtenbergstrasse 4, 85748, Garching bei München, Germany.
Chemistry ; 24(56): 14950-14957, 2018 Oct 09.
Article em En | MEDLINE | ID: mdl-30048018
Unlike different types of Lewis pairs as polymerization catalysts for acrylic monomers, organometallic aluminum(III) compounds are reported that show a surprisingly high polymerization activity even without an additional Lewis base. DFT calculations, end group analysis and kinetic investigations clearly suggest a main group element (MGE) group transfer polymerization (GTP) mechanism analogous to the known metal-mediated GTP mechanism. The novel catalysts perform a precision polymerization of a broad variety of monomers, ranging from 2-isopropenyl-2-oxazoline to tert-butylmethacrylate and N,N-dimethylacrylamide. Additionally, extended Michael-type structures like 4-vinyl pyridine are accessible. Especially the Al(III) half-metallocenes show an almost quantitative initiator efficiency, and, combined with the living character of the polymerization reactions, they enable the synthesis of block copolymers, even with unconventional monomers like vinyl phosphonates.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Chemistry Assunto da revista: QUIMICA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Alemanha País de publicação: Alemanha

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Chemistry Assunto da revista: QUIMICA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Alemanha País de publicação: Alemanha