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• W2020477372 endingPage "3431" @default.
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• W2020477372 abstract "Six new metal−organic frameworks (MOFs), namely, {[Fe(HPIDC)(H2O)]·2H2O}n (1), [Cd(HPIDC)(H2O)]n (2), [Zn(HPIDC)(H2O)]n (3), {[Eu3(HPIDC)4(H2O)8]·NO3·4H2O}n (4), {[Tb3(HPIDC)4(H2O)8]·Cl·4H2O}n (5), and {[Y3(HPIDC)4(H2O)8]·Cl·4H2O}n (6), were hydrothermally synthesized and characterized (H3PIDC = 2-(pyridin-4-yl)-1H-imidazole-4,5-dicarboxylic acid). Single crystal X-ray diffractions show ligands H3PIDC are doubly deprotonated in all compounds, and the doubly deprotonated HPIDC2− coordinates in the μ3 or μ4 mode to generate 2D or 3D MOFs, displaying four coordination modes. Both 1 and 2 are 3D MOFs, but different in structure topologies. In 1 the ligand HPIDC2− and metal center Fe(II) act as 3-connected nodes to fabricate a (10,3) porous metal−organic net with 1D open channels where 1D zigzag water chains are reside through hydrogen-bonding interactions. This dehydrated porous material can absorb for N2, with a determined BET surface area of 9.07 m2 g−1. In 2, however, ligand HPIDC2− and metal center Cd(II) serve as 4-connected nodes to form a 3D honeycomb framework. Complexes 3−6 all are 2D MOFs built up from T-shaped 3-connected HPIDC2− and 3- or 4-connected metal nodes. With the 3-connected metal nodes Zn(II), a stairway-like MOF with (4.82) topology in 3 is created. As for 4-connected metal nodes Eu(III), Tb(III) or Y(III), isostructural MOFs with novel (42.6)2(4.62)2(42.63.8)2(42.62.82) nets in 4−6 form. Notably, ligands HPIDC2− in 1, 3 and 4−6 are all T-shaped 3-connectors, but belong to different coordination modes, and the coordination lability also results in structural diversity, even with similar 3-connected nodes such as Fe(II) in 1 and Zn(II) in 3. The luminescent nature for 4 and 5 is the typical narrow emission bands of Eu(III) and Tb(III) ions, respectively. For 2, 3 and 6, the slightly blue-shifted emission bands are mainly due to intraligand emissions." @default.
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• W2020477372 date "2009-06-17" @default.
• W2020477372 modified "2023-09-22" @default.
• W2020477372 title "Syntheses of Metal−2-(Pyridin-4-yl)-1<i>H</i>-imidazole-4,5-dicarboxylate Networks with Topological Diversity: Gas Adsorption, Thermal Stability and Fluorescent Emission Properties" @default.
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• W2020477372 doi "https://doi.org/10.1021/cg801321e" @default.
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