Abstract
We report a new multicomponent polymerization (MCP) reaction for the synthesis of conjugated polytetraarylethene (PTAE) with aggregation-enhanced emission (AEE) properties. The polymerization of internal diyne (1), aryl diboronic acid (2), and aryl iodide (3) proceeded smoothly in the presence of Pd(OAc)2, DPEphos and Na2CO3 at 120 °C in dimethylacetamide, generating PTAE with a weight-average molecular weight of 11,300 in a yield of 71.1%. The resultant polymer has good solubility in common organic solvents and high thermal stability. Furthermore, PTAE is weakly emissive in dilute solution but gives enhanced emission in aggregated state, exhibiting an AEE characteristic. Its aggregates can work as fluorescent chemosensors for picric acid and Ru3+ with amplified sensitivity.
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