Abstract
In this work, a Zn(II) framework, {[Zn2(L)4(H2O)4]·(7DMF)(7H2O)}n (1Zn), has been synthesized using a bent tetracarboxylic acid ligand (H4L). The structure of 1Zn contains [Zn2(COO)4] paddle-wheel secondary building units with axial sites occupied by water molecules. Interestingly, the isostructural Cu(II) framework {[Cu2(L)4(H2O)4]·(7DMF)(7H2O)}n (1Cu) has been obtained via single-crystal to single-crystal metathesis reaction. The activated 1Cu (denoted as a1Cu; a stands for activated) has open coordination sites. This species showed enhanced CO2 adsorption and heterogeneous catalytic properties for the Hantzsch coupling reaction involving condensation of an aldehyde with ethyl acetoacetate and ammonium acetate to produce 1,4-dihydropyridines, and three-component coupling of amines, aldehydes and alkynes to generate propargylic amines with high efficiency.
Published Version
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