769170-81-2Relevant articles and documents
Syntheses and crystal structures of 1D tubular chains and 2D polycatenanes built from the asymmetric 1-(1-imidazolyl)-4-(imidazol-1-ylmethyl)benzene ligand with metal salts
Zhu, Hui-Fang,Zhao, Wei,Okamura, Taka-Aki,Fan, Jian,Sun, Wei-Yin,Ueyama, Norikazu
, p. 1010 - 1018 (2007/10/03)
Reactions of a new asymmetric ligand, 1-(1-imidazolyl)-4-(imidazol-1- ymethyl)benzene (IIMB), with various metal [Cd(II), Mn(II), Zn(II)] salts led to the formation of molecular, one- (1D) and two-dimensional (2D) architectures [Cd(IIMB)2(H2O)(SO4)]·7.5H2O 1, [Cd(IIMB)2Cl2]·H2O 2, [Cd(IIMB) 4(H2O)2](NO3)2-5H 2O 3, [Cd(IIMB)(OAc)2]·H2O 4, [Mn(IIMB)2(SO4)(H2O)]·8.2H2O 5, [Mn(IIMB)4(H2O)2]Cl2· 5H2O 6 and [Zn(IIMB)2]4(NO3) 8·13.5H2O 7. All the structures were established by single-crystal X-ray diffraction analysis. Both compounds 1 and 5 with sulfate anion are 2D polycatenanes formed by the interlocking of 1D double-stranded chains, while 2 and 4 with chloride and acetate anions are 1D chains. The results provide nice examples of topologies of metal-organic frameworks controlled by the counter anions. Interestingly, 3 and 6 are discrete molecular complexes with monometallic cores and form 2D networks through strong intermolecular hydrogen bonds. Complex 7, obtained under the same conditions as 3, is a 1D tubular chain. The structural difference between 3 and 7 suggests the metal ions also have a significant effect on the construction of supramolecular architectures. Furthermore, the photoluminescence properties of these compounds were investigated in the solid state at room temperature.
