Novel Metathesis Chemistry: Well-Defined Initiator Systems for Specialty Chemical Synthesis, Tailored Polymers and Advanced Material Applications

0181821 - UFCH-W 20030263 RIV NL eng M - Monography Chapter
Balcar, Hynek - Čejka, Jiří - Sedláček, J. - Svoboda, J. - Bastl, Zdeněk - Pacovská, M. - Vohlídal, J.
Mesoporous Molecular Sieves Immobilized Catalysts for Polymerization of Phenylacetylene and its Derivatives.
1-4020-1571-2. In: Novel Metathesis Chemistry: Well-Defined Initiator Systems for Specialty Chemical Synthesis, Tailored Polymers and Advanced Material Applications. Dordrecht: Kluwer Academic, 2003 - (Imamoglu, Y.; Bencze, L.), s. 155-165. NATO Science Series. II. Mathematics, Physics, and Chemistry. 122
R&D Projects: GA ČR GA203/02/0976
Institutional research plan: CEZ:AV0Z4040901
Keywords : polymerization * mesoporous molecular sieves
Subject RIV: CF - Physical ; Theoretical Chemistry

In the last decade, rhodium complexes are increasingly used as catalysts for a preparation of specialty polymers of diverse functionality, since a use of them brings about important advantages. Rh-catalysts (i) show unusually high tolerance to the reaction surroundings as well as to functional groups of reactants and products, (ii) they often show a precise control of the configurational structure of formed macromolecules (particularly those of polyvinylenes), (iii) they can be transformed to the living polymerization systems, (iv) they can be anchored on various inorganic and organic supports to give effective heterogeneous catalysts, and (v) they can catalyze reactions in the ionic liquid systems. Rhodium complexes are prevailingly used for a preparation of stereoregular (head-to-tail, cis-transoid) polymers of monosubstituted acetylenes, molecules of which easily adopt the helical conformation in the solid state, some of them even in solutions (e.g., molecules of poly(propiolate)s).
Permanent Link: http://hdl.handle.net/11104/0078337