38966-89-1Relevant academic research and scientific papers
Structure and host-guest properties of the nanoporous diaquatetrakis(p-nitrobenzoato)dicopper(II) framework
Kristiansson,Tergenius
, p. 1415 - 1420 (2007/10/03)
[Cu2(p-O2NC6H4CO2) 4(H2O)2]·Me2CO has been prepared and characterized by single crystal X-ray diffraction. The Cu-Cu distance is 2.608(1) A with the four p-nitrobenzoate ligands coordinated in bidentately bridging fashion, such that the copper atoms have a square pyramidal coordination. It possesses a framework structure with continuous channels parallel to the c axis with an opening size of ≈5.6 × 7.9 A, giving a solvent accessible volume of 22% of the crystal volume. The framework remains intact and crystalline after removal of the included acetone molecule, as determined by X-ray powder diffraction. It is shown, by thermogravimetric measurements, that also benzene and water guest molecules can reversibly be incorporated and released. For comparison, [Cu2(p-O2NC6H4CO2) 4(EtOH)2] was prepared and characterized by single crystal X-ray diffraction. Here, the channels are occupied by the axial ethanol ligands.
