The hydrothermal method 1 has proven to be a very effective way to grow crystals and hence, has been widely used in the synthesis of various solid-state inorganic materials. The purpose of this study is to design and synthesize coordination polymers containing metal centers and rigid ligands via this technique 2 . Two ligands that have been selected are 4,4'-bipyridine and oxalate. Oxalate is selected because of its strength, rigidity, and specificity.
All chemicals used are as purchased without purification.
The product was washed with water and acetone and dried in air. Compound I was isolated in quantitative yield. The reactions were carried out in a 23 mL acid digestion bomb at 170 o C for seven days. II in quantitative yield was collected. I and II .