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Issue 32, 2013
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Four (5,5)-connected three-dimensional metal organic materials based on pentacarboxylate ligand: Synthesis, structures and characterization

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Abstract

A new pentacarboxylate ligand, 5,5′-(6-(4-carboxyphenylamino)-1,3,5-triazine-2,4-diyldiimino) diisophthalic acid (H5L), was designed and used for the assembly of metal organic materials using Mn2+, Co2+, Cd2+ and Cu2+ as nodes. Four compounds, (Me2NH2)[Mn2L(H2O)]·3DMF·3H2O (1), (Me2NH2)[Co2L(H2O)]·3DMF·3H2O (2), (Me2NH2)[Cd2L(H2O)]·3DMF·3H2O (3) and [Cu4L(μ3-OH)2(NO3)(μ2-NMP)]·4.5NMP·2H2O (4) (DMF = dimethylformamide, NMP = N-methyl-2-pyrrolidone) have been synthesized and structurally characterized. Single crystal X-ray diffraction analyses show that 1 and 3 are isostructural, both based on {M2(CO2)5} molecular building blocks (MBBs) and L ligands. The topology of the 5-connected anionic framework may be described as (44)(66) (Schläfli symbol). Preliminary structural analysis indicates 2 may have the same structure as that of 1 and 3. 4 features a 5-connected 3D neutral framework based on “butterfly” {Cu43-OH)2(COO)5} MBBs and L ligands. The corresponding Schläfli symbol is (46)(64). N2 sorption isotherms of 2 shows typical type I behavior with BET surface area of 1251 m2 g−1 and a micropore volume of 0.491 cm3 g−1. Luminescent analysis indicates 3 exhibits linker-localized emission. Magnetic investigation of 4 reveals overall antiferromagnetic interactions. The compounds were further characterized by infrared (IR) and thermogravimetric analyses (TGA).

Graphical abstract: Four (5,5)-connected three-dimensional metal organic materials based on pentacarboxylate ligand: Synthesis, structures and characterization

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Publication details

The article was received on 07 Apr 2013, accepted on 07 Jun 2013 and first published on 07 Jun 2013


Article type: Paper
DOI: 10.1039/C3CE40599K
Citation: CrystEngComm, 2013,15, 6395-6402

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    Four (5,5)-connected three-dimensional metal organic materials based on pentacarboxylate ligand: Synthesis, structures and characterization

    Y. Wang, Z. Li, J. Zhu, X. Wang, L. Xu, A. Lachgar and J. Zhang, CrystEngComm, 2013, 15, 6395
    DOI: 10.1039/C3CE40599K

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