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[摘要]：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 C-13 NMR, H-1 NMR Si-29 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. |
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