Two interpenetrating CuII/NiII-coordinated polymers based on an unsymmetrical bifunctional N/O-tectonic: Syntheses, structures and magnetic properties

•A new unsymmetrical bifunctional N/O-tectonic as 4-connected spacer.•A 2-fold parallel interpenetrated sql layer with the same handedness.•A rare 8-fold interpenetrating dia network (class IIIa).

Two new interpenetrating CuII/NiII coordination polymers, based on a unsymmetrical bifunctional N/O-tectonic 3-(pyrid-4′-yl)-5-(4″-carbonylphenyl)-1,2,4-triazolyl (H2pycz), {[Cu-(Hpycz)2]·2H2O}n (1) and {[Ni(Hpycz)2]·H2O}n (2), have been solvothermally synthesized and structure characterization. Single crystal X-ray analysis indicates that compound 1 shows 2-fold parallel interpenetrated 44-sql layers with the same handedness. The overall structure of 1 is achiral—in each layer of doubly interpenetrating nets, the two individual nets have the opposite handedness to the corresponding nets in the adjoining layers—while 2 features a rare 8-fold interpenetrating 66-dia network that belongs to class IIIa interpenetration. In addition, compounds 1 and 2 both show similar paramagnetic characteristic properties.

Graphical abstractTwo new Cu(II)/Ni(II) coordination polymers present 2D parallel 2-fold interpenetrated 44-sql layers and a rare 3D 8-fold interpenetrating 66-dia network. In addition, magnetic susceptibility measurements show similar paramagnetic characteristic for two complexes.Figure optionsDownload full-size imageDownload as PowerPoint slide