3.1.2. Preparation of PS-Co(BBZN)Cl<sup>2</sup> Complex

The functionalized beads (1.0 g) were allowed to swell in 50 mL acetonitrile and toluene mixture in the ratio 1:1 for 1 h. Then the solvent was decanted. To this, 1.426 g of CoCl2.6 H<sup>2</sup> O dissolved in methanol (100 mL) was added at intervals (4 times) and heated at 60 ◦C for 48 h. It was filtered, washed with alcohol and Soxhlet extracted to remove any unreacted CoCl2.6 H<sup>2</sup> O. It was filtered and dried in an oven at 60 ◦C for 10 h and vacuum dried.
