Two‐Dimensional–Layered Zn (II) Cyclophosphazene—Organic Framework for Effective Photocatalytic Removal of Organic Dyes

ABSTRACT A novel two‐dimensional (2D) coordination polymer, formulated as {[Zn₂(trp)₂(L)]·DMF·3H₂O} ( PCP‐10 ), was synthesized via cyclophosphazene‐based tetracarboxylate ( H 4 L ) and N‐donor terpyridine ligand (trp). The synthesis was achieved through solvothermal methods, and the structure underwent thorough characterization using techniques such as FT‐IR, single crystal and powder XRD (SC and PXRD), thermal analysis, zeta potential, and UV‐DRS. X‐ray crystallographic analysis revealed that the cyclotriphosphazene ligand coordinated with Zn (II) ions, forming a 2D sheet‐like structure. Remarkably, PCP‐10 exhibited good efficacy in degrading various organic dyes such as MB, MO, and RhB under UVA light exposure, achieving degradation rates of up to 90%. High degradation performance of PCP‐10 was attributed to the unique N‐donor terpyridine ligand and its band gap properties. Additionally, the study elucidated the role of reactive oxygen species (ROS) in dye degradation, emphasizing the significance of superoxide radicals (O 2 ˙ − ). Scavenger experiments identified specific ROS involved in the degradation mechanism, aiding in customizing photocatalyst and scavenger systems. Furthermore, the durability of PCP‐10 was assessed through repeated use testing, showcasing its high initial efficiency and minimal decline over five cycles, indicative of superior durability. In conclusion, this study underscores the potential of PCP‐10 as an effective photocatalyst for environmental remediation, highlighting the importance of chemical composition and structural properties in optimizing photocatalytic performance. The solid‐state photoluminescence properties of PCP‐10 were also studied.