Three multinuclear Co(II), Zn(II) and Cd(II) complexes based on a single-armed salamo-type bisoxime: syntheses, structural characterizations and fluorescent properties

<p>Three multinuclear complexes, [Co(L)(OAc)Co(CH<sub>3</sub>CH<sub>2</sub>OH)<sub>2</sub>]·H<sub>2</sub>O, [Zn(L)(OAc)Zn(CH<sub>3</sub>OH)], and [{Cd(L)(OAc)Cd(CH<sub>3</sub>OH)}<sub>2</sub>], containing a single-armed salamo-type bisoxime H<sub>3</sub>L have been synthesized and characterized structurally. The Co(II) complex forms a dimeric unit by intermolecular hydrogen bond interactions of neighboring dimeric molecules. The Zn(II) complex also forms a dimeric unit by intermolecular hydrogen bond interactions. Interesting features of the crystal structure include O⋯O short contacts. Meanwhile, self-assembling infinite 1-D, 2-D, and 3-D supramolecular structures are formed by intermolecular hydrogen bond and C–H⋯<i>π</i> interactions. The Cd(II) complex forms an infinite 2-D supramolecular structure by intermolecular hydrogen bond interactions. The photophysical properties of the Co(II), Zn(II), and Cd(II) complexes have also been discussed.</p>