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In this work, an Eu 3+ -based dual-function metal−organic framework(1) has been successfully constructed. This compound can effectively detect Cu 2+ , Fe 3+ , and 4-nitrophenol with low detection limits of 18.3, 12.2, and 3.63 ppm, respectively. It also displays a high second-harmonic generation response ca. 2.0 times that of KH 2 PO 4 .

Six metal–organic frameworks with variation of topologies and entanglements have been successfully synthesized with mixed tris[4-(1H-imidazol-1-yl)phenyl]phosphine oxide and dicarboxylate ligands.

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Six entangled coordination polymers from a bisimidazole ligand and versatile carboxylate acids have been synthesized and structurally characterized. Their adsorption behaviors to organic dyes have also been evaluated.