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A new 3D luminescence metal–organic framework with open channels was constructed by the assembling of the zwitterionic H 3 L Cl ligand and Zn(II) ions under solvothermal conditions. The compound exhibits relatively high luminescence selective sensing for Fe 3 + ions with surprisingly excellent recyclability, making it a promising candidate for sensing metal ions in practical. [ABSTRACT FROM AUTHOR]

Abstract: Under hydrothermal conditions, using 5-methyl-pyrazine-2-carboxylic acid (HL) and lead(II) chloride, a new 2D lead(II) framework [Pb(L)(μ2-Cl)(H2O)] n can be isolated, in which infinite Pb–O–Pb helical chains can be observed. Interestingly 1 stacks in ABAB… ways, in one layer right-handed Pb–O–Pb and left-handed Pb–Cl–Pb helical chains are inter-connected while the opposite chiral Pb–O–Pb and Pb–Cl–Pb helical chains are included in the neighboring layer. Solid state luminescent spectrum of 1 also has been investigated indicating strong emission bands centered at 452nm. [Copyright &y& Elsevier]

Abstract: Under hydrothermal conditions using a triazole derivative ligand 3-carboxylic acid-4H-1,2,4-triazole (HL) and corresponding lead(II) salts, a novel two-dimensional(2D) lead(II) complex {[Pb(L)(μ2-Cl)(H2O)} n (1) has been isolated. In 1 Pb2Cl2(H2O)2 building blocks can be observed, which are extended by tetra-dentate coordinated L ligands to form a 2D corrugated layered structure. 1 also represents a novel example of luminescent lead(II) frameworks with triazole derivatives. Solid-state fluorescence spectrum of 1 exhibits the excited peak at 376nm while the emission peak at 604nm. [Copyright &y& Elsevier]