Abstract
Two metal-organic coordination polymers, [Zn(1,2,4-BTC)(bipy)] n (1) (1,2,4-BTC = 1,2,4-benzenetricarboxylic acid, bipy = 4,4′-bipyridine) and [Zn(1,3,5-BTC)(bipy)(H2O) · 3H2O] n (2) (1,3,5-BTC = 1,3,5-benzenetricarboxylic acid, bipy = 4,4′-bipyridine), have been synthesized using the principle of crystal engineering. Despite similar reactants and reaction conditions, complex 1 is an infinite 2-D square-grid network while complex 2 is a 1-D zigzag chain. 4,4′-bipyridine is a terminal monodentate ligand towards the Zn centers, which is rare in Zn polymers because 4,4′-bipyridine is a linear molecule and bridges central ions using two nitrogen atoms. Both coordination polymers show blue luminescence in the solid state at room temperature.
Acknowledgement
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (20301013).