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首页> 外文期刊>Crystal growth & design >A Family of Metal-Organic Frameworks with a New Chair-Conformation Resorcin4arene-Based Ligand: Selective Luminescent Sensing of Amine and Aldehyde Vapors, and Solvent-Mediated Structural Transformations
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A Family of Metal-Organic Frameworks with a New Chair-Conformation Resorcin4arene-Based Ligand: Selective Luminescent Sensing of Amine and Aldehyde Vapors, and Solvent-Mediated Structural Transformations

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摘要

By utilizing a new chair-conformation resorcin4arene-based octacarboxylate ligand, four functional metal organic frameworks (MOFs), namely, (CH3)(2)NH2(4)Cd-2(L)center dot 4H(2)O (1), (CH3)(2)NH2(4)Zn-2(L)center dot 2DMF center dot 6H(2)O (2), (CH3)(2)NH2(4)Co-2(L)center dot 2DMF center dot 4H(2)O (3), and (CH3)(2)NH2(2) CO3(L) (H2O)(12) (4) (H8L = 2,8,14,20-tetramethylphenyl-4,6, 10,12,16,18,22,24-octa-carboxymethoxyresorcin4arene and DMF = N,N-dimethylformamide), were solvothermally synthesized and structurally characterized. In 1, each L8- anion bridges eight Cd(II) atoms to give a threedimensional (3D) (4,8)-connected (4(6))(4(12).6(10).8-(6)) framework. In isostructural 2 and 3, each L8- anion links eight adjacent Zn(II) or Co (II) atoms to yield a 3D (4,8)-connected (4(6))(4(11).6(12).8(5)) net. In 4, each L8- anion only bridges four Co(II) atoms by using its four carboxylates each in a monodentate coordination mode to generate an infinite one-dimensional (1D) chain. Remarkably, the highly selective luminescent sensing of amine and aldehyde vapors was studied for 1 and 2 as fluorescent sensors. Importantly, a solvent-induced structural transformation from the 1D chain to the 3D porous framework between 3 and 4 was also investigated in detail.

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