Two open-framework zinc phosphites constructed from different secondary building units

•New metal phosphites are constructed from different secondary building units.•Open-framework structures display bnn and dia topologies.•A hypothetic 4-connected net is proposed.

Presented here are two new zinc phosphites, formulate as Zn3(dabco)2(HPO3)3 (1, dabco = 1,4-diazabicyclo[2·2·2]octane), and H2pmdeta ⋅ Zn3(HPO3)4 (2, pmdeta = N,N,N′,N″,N″-pentamethyldiethylenetriamine). Compound 1 has 12-membered-ring (12 MR) channels with a 5-connected bnn topology containing 4 = 1 secondary building units. Compound 2 has multidirectional 10 MR channels with a pcu topology constructed from 6*1 secondary building units. The gas adsorption and fluorescent properties of compound 1 were also investigated.

Graphical abstractTwo open-framework zinc phosphites are constructed from 4 = 1 and 6*1 secondary building units, respectively. For the first time, the 6*1 units are organized into a three-dimensional structure in metal phosphite systems. A hypothetic 4-connected framework is proposed by converting 6*1 units into D4R units.Figure optionsDownload full-size imageDownload as PowerPoint slide