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Two new binuclear complexes, [Ni 2 L(OAc) 2 (H 2 O)]ClO 4 ·H 2 O·CH 2 Cl 2  ( 1 ) and [Zn 2 L(OAc) 2 ]ClO 4 ·CHCl 3 ·0.5C 6 H 12  ( 2 ), have been synthesized by using 2-[ N,N -di(2-pyridylmethyl)aminomethyl]-6-(2-imidazolylmethyl)aminomethyl-4-methylphenol (HL) as a ligand. Complexes  1  and  2  have been characterized by FT-IR, powder X-ray diffraction, elemental analysis and single-crystal X-ray diffraction. X-ray crystallographic analyses show that  1  crystallizes in the triclinic  P -1 space group, while  2  in the monoclinic  C 2/ c  space group. Both Ni1 and Ni2 in  1  are six-coordinate octahedra with a [Ni1O 3 N 3 ] and [Ni2O 4 N 2 ] configuration. In  2 , the six-coordinate Zn1 cation displays a distorted octahedral [Zn1O 3 N 3 ] configuration, while the five-coordinate Zn2 cation has a trigonal bipyramidal [Zn2O 2 N 3 ] geometry. The intermolecular interactions in  1  and  2  have been investigated by 3D Hirshfeld surface analyses and 2D fingerprint plots to show that the prominent interactions are H···H and O···H/H···O contacts in  1  and H···H and Cl···H/H···Cl contacts in  2 . Notably, the fluorescence emission of  2  has larger intensity than that of the free HL.

journal of coordination chemistry

Syntheses, crystal structures, Hirshfeld surface analyses and fluorescence of binuclear complexes with unsymmetrical phenol-based compartmental ligands