An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Abstract Five isoreticular lanthanide (Ln) metal‐organic frameworks (MOFs) – Er(bdc)(HCOO) ( 1a ), Dy(bdc)(HCOO) ( 1b ), Tb(bpdc)(HCOO) ( 2a ), Gd(bpdc)(HCOO) ( 2b ) and Tb(bpydc)(HCOO) ( 3 ) (bdc = 1,4‐benzenedicarboxylate, bpdc = 4,4′‐biphenyldicarboxylate and bpydc = 2,2′‐bipyridine‐5,5′‐dicarboxylate) – were synthesized under solvothermal conditions. The complexes were characterized by powder X‐ray diffraction, elemental analyses, infrared spectroscopy and single‐crystal X‐ray crystallography. Each Ln III ion is eight‐coordinated and forms a binuclear pseudo‐paddlewheel secondary building unit (SBU), [Ln 2 (CO 2 ) 2 (CO 2 ) 2 ]. The SBUs are interconnected into 2D Ln–carboxylate nets, which act as tertiary building units (TBUs) that are linked by the rigid organic linkers to form 3D pillared frameworks. Preliminary luminescence studies reveal that energy transfer from Tb 3+ to Eu 3+ trace impurities is active in crystals of 2a and 3 and contributes to interesting temperature‐dependent photoluminescence. At 298 K, under UV excitation, 2a is lilac and 3 glows bright red, whereas at 77 K both 2a and 3 emit green light. Together with the previously published Tb(bdc)(HCOO), Eu(bdc)(HCOO), Gd(bdc)(HCOO) and Ln(bpedc)(HCOO) (bpedc = biphenylethene‐4,4′‐dicarboxylate), these complexes form the first examples of isoreticular LnMOFs.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
The reaction of uranyl nitrate hexahydrate with 4-halopyridinium ions (X = Cl, Br, I) in high chloride media has resulted in three novel compounds, each of which is based around the [UO2Cl3(NO3)]2− tecton; (C5H5NCl)2[UO2Cl3(NO3)], (C5H5NBr)2[UO2Cl3(NO3)] and (C5H5NI)3[UO2Cl3(NO3)](NO3). In each material the halogen is involved in various forms of intermolecular interaction, including hydrogen bonding, halogen–halogen interactions and halogen–nitrate interactions. Presented is a discussion of the role of the halogen, in terms of Lewis acidity, in directing the overall structure.
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