Acyclic diene metathesis synthesis of silylene- and siloxane-containing conjugated polymers and macrocycles

作者：Mukherjee Narayan; Peetz Ralf M^*

来源：Macromolecules, 2008, 41(18): 6677-6685.

DOI：10.1021/ma800671g

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 M(n) similar to 2000-6000 g/mol as determined by GPC and molecular weight distributions M(w)/M(n) similar to 1.4-1.7. The microstructure was proven by means of (13)C NMR, (1)H NMR (29)Si 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 similar to 24-28% and blue light emission.

• 出版日期2008-9-23