Hexanuclear 3d–4f complexes as efficient catalysts for converting CO2 into cyclic carbonates†
Li
Wang, 
*ab
Weisheng
Liu
*a
*ab
Weisheng
Liu
*a
Abstract
A series of novel hexanuclear 3d–4f complexes formulated as {[Ln2Zn4(μ3-OH)2L4(AcO)2(NO3)2(DMF)2]·2(CH3OH), LnIII = Dy3+ (1), Nd3+ (2), Tb3+ (3)} have been synthesized and characterized. These complexes 1–3 show excellent catalytic performance for the cycloaddition of CO2 and epoxides to obtain cyclic carbonates. The catalytic system has a wide substrate scope with high turnover numbers (9700) and high turnover frequencies (808 h−1) under mild conditions. Additionally, the catalysts could be conveniently prepared on a large scale and recycled.
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