The hydrothermal reaction of benzene-1,3,5-tricarboxylic acid (H3BTC) with MII (M = Mn, Co or Zn), tris(4-carboxyphenyl)phosphine oxide (H3TPO) or cis-stilbene-4,4′-dicarboxylic acid (H2SDA) with CoII and 2,2′-bipyridyl (BIPY) gave 1-D co-ordination networks formulated as: [M(HBTC)(BIPY)(H2O)] (M = Mn 1, Co 2, or Zn 3; [Co3(BTC)2-(BIPY)2(H2O) 6]·4H2O 4, [Co3(TPO)2(BIPY)2(H2O) 6]·xH2O 5 and [Co(SDA)(BIPY)(H2O)] 6. Structures 1 and 2 consist of double stranded chains of alternating HBTC dianions and dimeric units MII-MII linked by two μ-(1,1) bridging carboxylates. Magnetic properties of 1 and 2 indicate the presence of ferromagnetic exchange interactions within the dimers. Structures 4 and 5 consist of chains with a molecular ladder motif which are stacked creating large channels lined by hydrated cobalt(II) ions. The H2O/D2O solvent exchange in structure 5, studied by infrared spectroscopy and thermal gravimetric analysis-mass spectrometry, provides evidence for the porosity and zeolitic nature of the material.
|Number of pages||8|
|Journal||Journal of the Chemical Society, Dalton Transactions|
|Publication status||Published - 7 Dec 1999|