Acyclic Diene Metathesis Synthesis of Silylene- and Siloxane-Containing Conjugated Polymers and Macrocycles†

Autor:	Narayan Mukherjee, Ralf M. Peetz
Rok vydání:	2008
Předmět:	Polymers and Plastics Organic Chemistry Silylene Conjugated system Carbon-13 NMR Inorganic Chemistry chemistry.chemical_compound chemistry Siloxane Polymer chemistry Materials Chemistry Proton NMR Copolymer Molecule Acyclic diene metathesis
Zdroj:	Macromolecules. 41:6677-6685
ISSN:	1520-5835 0024-9297
Popis:	Silylene- and siloxane-functional conjugated polymers and macrocycles could be synthesized via acyclic diene metathesis (ADMET) condensation of silylene- and siloxane-containing bis-styryl monomers. The organic conjugated segment formed was stilbene with all-trans-configured vinylene bonds. The flexible siloxane linkage resulted exclusively in dimeric macrocycles under the reaction conditions investigated, while the silylene linkage led to linear polycondensates with molecular weights Mn ∼2000−6000 g/mol as determined by GPC and molecular weight distributions Mw/Mn ∼ 1.4−1.7. The microstructure was proven by means of 13C NMR, 1H NMR, 29Si NMR, and FTIR. Photophysical characterization of the products showed the participation of Si in the conjugation, in both the siloxanes and silylenes, with photoluminescence quantum efficiencies ∼24−28% and blue light emission.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a8a8007cc4955a4cf3d82edcfacc131f https://doi.org/10.1021/ma800671g Zobrazit plný text záznamu