Synthesis, characterization, and catalytic behavior of two open-framework zinc phosphites with 2D and 3D structures

Two new zincophosphites are obtained via a hydrothermal process. Single crystal data indicate that 1 has a two dimensional motif with the organic amine template embedded between the layers, while 2 has a three-dimensional structure with the organic amine template enclosed into the cavities. Knoevenagel condensation of benzaldehyde and ethyl cyanoacetate is carried out with these two complexes as support in ethanol at 333 K respectively. Experimental results indicate that only 1 is efficient for the catalysis. The catalytic ability depends on their structural characters.

Graphical AbstractTwo new zincophosphites are synthesized and characterized. Studies on Knoevenagel condensation of benzaldehyde and ethyl cyanoacetate over them indicate that the catalytic performance of compound 1 is better than that of compound 2.Figure optionsDownload as PowerPoint slideResearch Highlights
► Two zinc phosphites are used for the catalysis of Knoevenagel condensation reaction.
► Their structures are characterized by single crystal data.
► The catalytic ability depends on their structural characters.
► The catalytic performance of compound 1 is better than that of compound 2.