. "alkyne polymerization; conjugated polymers; metathesis; Mo heterogeneous catalysts"@en . . "\u010Cejka, Ji\u0159\u00ED" . . . . . "7"^^ . "RIV/61388955:_____/08:00309686!RIV09-AV0-61388955" . . . "Topka, Pavel" . . . . . "Polymerization of aliphatic alkynes with heterogeneous Mo catalysts supported on mesoporous molecular sieves" . "3"^^ . . "[986EA2F0A38E]" . "Sedl\u00E1\u010Dek, J." . "Polymerization of aliphatic alkynes with heterogeneous Mo catalysts supported on mesoporous molecular sieves"@en . "Polymerization of aliphatic alkynes with heterogeneous Mo catalysts supported on mesoporous molecular sieves" . "7" . "Polymerization of aliphatic alkynes with heterogeneous Mo catalysts supported on mesoporous molecular sieves"@en . "Conjugated polymers attract a particular attention as functional materials for electronics, photonics, and related applications as well as for gas separation and pervaporation membranes.[1-5] These polymers are usually prepared by coordination polymerization of corresponding alkynes induced with homogeneous catalysts. The increased requirements for a high purity of these polymers, especially for a low level of catalyst residues, initiated the investigation of heterogeneous catalysts, the application of which enables easy and complete separation of produced polymers from catalysts.[6] Rh complexes immobilized on polymeric supports[7][8] and/or mesoporous molecular sieves[9][10] have been successfully used for polymerization of phenylacetylene and its derivatives into polymers of high purity. These catalysts failed, however, in polymerization of aliphatic alkynes."@en . . "Conjugated polymers attract a particular attention as functional materials for electronics, photonics, and related applications as well as for gas separation and pervaporation membranes.[1-5] These polymers are usually prepared by coordination polymerization of corresponding alkynes induced with homogeneous catalysts. The increased requirements for a high purity of these polymers, especially for a low level of catalyst residues, initiated the investigation of heterogeneous catalysts, the application of which enables easy and complete separation of produced polymers from catalysts.[6] Rh complexes immobilized on polymeric supports[7][8] and/or mesoporous molecular sieves[9][10] have been successfully used for polymerization of phenylacetylene and its derivatives into polymers of high purity. These catalysts failed, however, in polymerization of aliphatic alkynes." . "46" . "Journal of Polymer Science. Part A - Polymer Chemistry" . "387411" . "5"^^ . . "RIV/61388955:_____/08:00309686" . "P(GA203/05/2194), P(IAA4040411), P(KAN100400701), Z(AV0Z40400503), Z(MSM0021620857)" . . "Balcar, Hynek" . . . "Polymerizace alifatick\u00FDch alkin\u016F s heterogenn\u00EDmi Mo katalyz\u00E1tory nanesen\u00FDmi na mezopor\u00E9zn\u00EDch molekulov\u00FDch s\u00EDtech"@cs . . "000254587500028" . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "Polymerizace alifatick\u00FDch alkin\u016F s heterogenn\u00EDmi Mo katalyz\u00E1tory nanesen\u00FDmi na mezopor\u00E9zn\u00EDch molekulov\u00FDch s\u00EDtech"@cs . . "Zedn\u00EDk, J." . "0887-624X" . . . "3-Ethynylthiofene (3ETh) byl polymerizov\u00E1n s Rh(I)komplexy: [Rh(cod)acac], [Rh(nbd)acac], [Rh(cod)Cl]2 a [Rh(nbd)Cl]2 (cod je .eta.2:.eta.2-cycloocta-1,5-diene a nbd je .eta.2:.eta.2-norborna-2,5-diene) pou\u017Eit\u00FDmi jako homogenn\u00ED katalyz\u00E1tory a s kompexy [Rh(cod)Cl]2 a [Rh(nbd)Cl]2 imobilizovan\u00FDmi na mezopor\u00E9zn\u00EDm polybenzimidazolu pou\u017Eit\u00FDmi jako heterogenn\u00ED katalyz\u00E1tory. V\u0161echny testovan\u00E9 katalyz\u00E1tory poskytly poly(3ETh) s vysok\u00FDm obsahem cis dvojn\u00FDch vazeb. In situ NMR studium homogenn\u00EDch polymerizac\u00ED iniciovan\u00FDch [Rh(cod)acac] a [Rh(nbd)acac] komplexy uk\u00E1zalo: (i) \u017Ee transformace acac ligand\u016F na voln\u00FD acetylaceton (Hacac) nast\u00E1v\u00E1 ji\u017E v po\u010D\u00E1te\u010Dn\u00EDm stadiu polymerizace, co\u017E nazna\u010Duje, \u017Ee tato reakce je sou\u010D\u00E1st\u00ED iniciace, (ii) \u017Ee iniciace je pomal\u00E1 v obou polymeriza\u010Dn\u00EDch syst\u00E9mech a (iii) \u017Ee v pr\u016Fb\u011Bhu polymerizace doch\u00E1z\u00ED k uvoln\u011Bn\u00ED cod ligandu z [Rh(cod)acac] ale nikoli nbd ligandu z [Rh(nbd)acac]."@cs .