Concise synthesis of 3-alkylthieno[3,2-<i>b</i>]thiophenes; building blocks for organic electronic and optoelectronic materials.

The polymers P15a–P15d had relatively non-homogeneous surface morphology, and, while no apparent trend on their Rms values was observed, a decreasing trend appeared with the polymers P15f–P15j.

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