Two different Zn(II) interpenetrating networks derived from different dicarboxylate ligands mixed with a flexible imidazole-based ligand

• Two Zn(II) complexes have been synthesized by varying dicarboxylate ligands.
• The two complexes show different interpenetrating characters.
• The different structures is caused by the spacers of dicarboxylate coligands.

Two interpenetrating networks based on 1,4-bis(2-methylimidazol-1-ylmethyl)-2,3,5,6-tetramethylbenzene (bmimx), namely, {[Zn2(bmimx)2(cba)2]·2.5H2O}n (1) and {[Zn(bmimx)(suc)]·2H2O}n (2) (H2cba = 4,4′-carbonyldibenzoic acid, H2suc = succinic acid) have been prepared at hydrothermal condition by varying the dicarboxylate ligands. Single-crystal X-ray diffraction indicates that complex 1 shows a 4-connected dmp net with 3-fold interpenetration which contains 1D (Zn − cba)n right- and left-handed helical chains; complex 2 shows a dia topology with 4-fold interpenetration. The results indicate that the spacers of dicarboxylate coligands have an important effect on the interpenetrating characters and ultimate frameworks. Moreover, the photoluminescence properties of the two complexes were studied in the solid state at room temperature.

Two different Zn(II) interpenetrating networks have been synthesized by varying the dicarboxylate ligands. Complex 1 shows a dmp net with 3-fold interpenetration; complex 2 exhibits a dia topology with 4-fold interpenetration. The structural differences indicate that the spacers of dicarboxylate coligands have an important effect on the interpenetrating characters and ultimate frameworks.Figure optionsDownload as PowerPoint slide