Journal
CRYSTAL GROWTH & DESIGN
Volume 13, Issue 9, Pages 4092-4099Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cg400913f
Keywords
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Funding
- China Natural Science Foundation [21101023]
- Fundamental Research Funds for the Central Universities [10QNJJ010]
- Jilin Provincial Science and Technology Development Foundation [201101007]
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Six new coordination polymers, (Me2NH2)[In(L)]center dot DMF (1), (Me2NH2)(2)[In-2(L)(2)]center dot(DMF)(3)center dot(H2O)(2) (2), (Me2NH2)(4)[Cd-2(L)(2)]center dot(DMF)(2) (3), (Et2NH2)(2)[Cd(L)]center dot H2O (4), (Et2NH2)(3)[Cd-2(L)(2)]center dot(DEF)(2)center dot(H2O)(4) (5), (Et2NH2)(3)[Cd-2(L)(2)]center dot(EtNH2)(2)center dot(H2O)(2) (6) have been prepared based on a newly designed flexible tetracarboxylate ligand of H4L {H4L = 5-[bis(3-carboxybenzyl)amino]isophthalic acid; DMF = N,N-dimethylformamide; DEF = N,N-diethylformamide}. Compounds 1-6 possess very similar two-dimensional framework structures with (4,4)-net topology. These compounds comprise two groups of conformational supramolecular isomers, owing to identical compositions of the frameworks but different conformations of ligands. It is worth noting that as much as seven pairs of stereoisomers of ligands have been found in these compounds, which demonstrated that the introduction of multiple single bonds has greatly expanded the flexibility of the ligand. The photoluminescent properties of compounds 1-6 have also been investigated where the emission of these supramolecular isomers are from blue to green.
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