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Structural analyses indicate that CP 1 manifests a three-dimensional (3D) 6 6 -dia framework. CP 2 displays a 3D 4 12 •6 3 network based on dinuclear units Cd 2 (COO) 2 . CP 3 shows a one-dimensional (1D) zigzag chain structure. CP 4 presents a 6 5 •8 framework with paddle-wheel-like Cd 2 (COO) 4 secondary building units. CPs 5 and 6 show a 1D double-chain structure and a 1D linear chain structure, respectively. The structural discrepancy of CPs 1−6 demonstrates that dicarboxylate ligands have a major impact on the structures of CPs. Furthermore, CP 4 shows remarkable sensing performance for Fe 3+ ions and pesticides with luminescent quenching, which can function as a luminescent sensor for Fe 3+ ions and pesticides.