Two couples of enantiomerically pure chiral cyano-bridged heterobimetallic one-dimensional (1D) chain complexes: [Mn((R,R)-Salphen)Fe(Tp)(CN)3],, (1) and [Mn((S,S)-Salphen)Te(Tp)(CN)3]n (2) (Salphen = N,N'-l,2-dip...Two couples of enantiomerically pure chiral cyano-bridged heterobimetallic one-dimensional (1D) chain complexes: [Mn((R,R)-Salphen)Fe(Tp)(CN)3],, (1) and [Mn((S,S)-Salphen)Te(Tp)(CN)3]n (2) (Salphen = N,N'-l,2-diphenylethylenebis (salicylideneiminato) dianion, Tp = tris(pyrazolyl) hydroborate), [Mn((R,R)-Salphen)Fe(Tp*)(CN)3·2H2O],, (3) and [Mn((S,S)-Salphen)Fe(Tp*)(CN)3.2H20],, (4) (Tp* = hydridotris (3,5-dimethylpyrazol-l-yl) borate), have been successfully synthesized by the reactions of MnⅢ schiff-base complexes with the tricyanometalate building block, [(Lxp)Fe(CN)3]- (Lyp = Tp or Tp*). All complexes are made up of neutral cyano-bridged zigzag double chains with (-Fe-CN-Mn-NC-),, as the repeating unit. Circular dichroism (CD) spectra confirm the enantiomeric nature of the optically active complexes. Magnetic studies demonstrate that ferromagnetic interactions are operative in these complexes. The ferromagnetic couplings become weak in the chains with the bending of the Mn-N=C angles.展开更多
基金financially supported by the Major State Basic Research Development Program (2011CB808704)the National Natural Science Foundation of China (91022031)
文摘Two couples of enantiomerically pure chiral cyano-bridged heterobimetallic one-dimensional (1D) chain complexes: [Mn((R,R)-Salphen)Fe(Tp)(CN)3],, (1) and [Mn((S,S)-Salphen)Te(Tp)(CN)3]n (2) (Salphen = N,N'-l,2-diphenylethylenebis (salicylideneiminato) dianion, Tp = tris(pyrazolyl) hydroborate), [Mn((R,R)-Salphen)Fe(Tp*)(CN)3·2H2O],, (3) and [Mn((S,S)-Salphen)Fe(Tp*)(CN)3.2H20],, (4) (Tp* = hydridotris (3,5-dimethylpyrazol-l-yl) borate), have been successfully synthesized by the reactions of MnⅢ schiff-base complexes with the tricyanometalate building block, [(Lxp)Fe(CN)3]- (Lyp = Tp or Tp*). All complexes are made up of neutral cyano-bridged zigzag double chains with (-Fe-CN-Mn-NC-),, as the repeating unit. Circular dichroism (CD) spectra confirm the enantiomeric nature of the optically active complexes. Magnetic studies demonstrate that ferromagnetic interactions are operative in these complexes. The ferromagnetic couplings become weak in the chains with the bending of the Mn-N=C angles.
