The ionic liquid [HMTH]2H2[SiW12O40] was prepared from the inexpensive, nontoxic vitamin B1-like compound, i.e., 5-(2-hydroxyethyl)-4-methylthiazole (HMT), and the noncorrosive heteropolyacid (H4SiW12O40). This acidic ionic liquid was found to be an efficient heterogeneous catalyst for the direct dehydrative coupling of alcohols with alcohols (or alkenes) to synthesize various polysubstituted olefins in good to excellent yields with dimethyl carbonate (DMC) as a green solvent. Furthermore, this protocol was applicable in a gram-scale reaction, and the catalyst could be used at least for 8 runs without significant loss of activity.

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The acceptors play vital roles in absorbing sunlight and consequently producing charge in organic solar cells (OSCs). Boron-based non-fullerene acceptors have received particular attention due to their tunable electronic structure...

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