Cd(II) complexes from imidazole substitute isophthalate ligand: syntheses, structural characterization, and fluorescence property

Abstract

The hydrothermal reaction of Cd(II) salt with 5-[(2-methyl-1H-imidazol-1-yl)methyl]isophthalic acid (H₂L) leads to the formation of a new complex [Cd(L)(H₂O)] (1). While in the presence of 2,2′-bipyridine (bpy) and 1,10-phenanthroline (phen) as auxiliary ligands, complexes [Cd(L)(bpy)]∙H₂O (2) and [Cd(L)(phen)]∙2H₂O (3) were obtained. Complexes 1–3 have been characterized by single crystal and powder X-ray diffractions, IR, and elemental and thermogravimetric analyzes. As a result, complex 1 exhibits twofold interpenetrated 3-D (10,3)-a architecture, 2 displays chain structure, and 3 shows uninodal 3-connected hcb network with (6³) topology. The impact of auxiliary ligands on the structures of resultant complexes is discussed. Moreover, luminescence property of 1–3 was investigated.

Keywords:

• Cd(II) complex
• Structural characterization
• Fluorescence

Funding

This work was supported by the Huaian Administration of Science and Technology of Jiangsu Province of China [HAG201222] and [HC201216].