Topological Co(II)-malonate polymorph: Degradation properties of Naproxen and colorimetric recognition of acetone, Cr2O72−, and Fe3+

Two Co(II)coordination polymers namely, [Co(mal)(4,4`-bpy)<sub>0.5</sub> (H<sub>2</sub>O)]<sub>n</sub>(1) and [Co(mal)(4,4`-bpy)_0.5 (H₂O)]_n(2)are synthesized at ambient temperature, both complexes are based on {Co(RCOO)₂}unitserving as 3D network along with sqc and fes topology and corroborated by many analytical techniques. CPs(1) crystallized in a 2D manner and then constructed a 3D hydrogen bonding network which was demonstrated monoclinic crystal system while(2)is a 3D supramolecular network that possesses a tetrahedral crystal system, according to topological analysis CPs(1) shows 5-C net and CPs(2) elaborates a 3-C net which proves both are completely different. A luminescence investigation was performed using both coordination polymers (CPs), which demonstrated effective colorimetric detection of acetone, Cr₂O₇²⁻, and Fe³⁺, with corresponding detection limits of 1.91, 2.57, and 0.29 ppm, respectively, in an ethanolic medium. Additionally, the catalytic degradation of Naproxen was evaluated for both catalysts, revealing significant degradation efficiencies of 90 % for catalyst (1) and 38 % for catalyst (2).