Cadmium(II) and lanthanum(III) coordination architectures with anthracene-9,10-dicarboxylate: Crystal structures and photoluminescent properties

Two new coordination polymers, namely, [Cd(HL)2]∞ (1) and [La2(L)3(DMAC)6]∞ (2) (L = anthracene-9,10-dicarboxylate and DMAC = N,N-dimethylacetamide), were synthesized. Their structures were characterized by elemental analyses, infrared spectra, and single crystal X-ray diffraction analysis. Complex 1 is found to assume a three-dimensional (3D) twofold interpenetrating diamond network, showing one-dimensional channels running along the [1 1 1] direction. On the other hand, 2 has a two-dimensional 63 honeycomb network, which is further linked into 3D supramolecular networks by C–H···π interactions. The results indicate that the different synthesis methods play important roles in controlling the formation of the final frameworks of 1 and 2. The luminescent properties of the corresponding complexes were also briefly investigated.

Graphical abstractTwo new metal–organic complexes, showing a three-dimensional (3D) twofold interpenetrating diamond network and a two-dimensional (2D) 63 honeycomb network, have been successfully constructed by using anthracene-9,10-dicarboxylate ligands. The effects of different synthesis methods have been discussed and the spectroscopic properties of these complexes were studied.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Two anthracene-9,10-dicarboxylate complexes were synthesized and characterized. ► Complex 1 assumes a 3D twofold interpenetrating diamond network, showing 1D channels. ► Complex 2 has a 2D 63 honeycomb network, further linked into 3D supramolecular networks. ► Synthesis methods play important roles in controlling the formation of the final frameworks. ► The luminescent properties of the complexes were briefly investigated.