Complexes of Zn(II) and Сu(II) with the Amino Derivatives of Deoxycholic Acid: Syntheses, Structures, and Properties

Abstract: Complexes [Zn(L)Cl₂] (I), Cu(L)Cl₂ ∙ H₂O (II), Zn(L¹)Cl₂ ∙ 0.5H₂O (III), and Cu(L¹)Cl₂ ∙ 0.5H₂O (IV) (where L and L¹ are the diaminopropylene and diaminoethylene derivatives of deoxycholic acid, respectively) are synthesized. The structure of mononuclear complex I is determined by X-ray structure analysis (CIF file CCDC no. 1875305). The coordination polyhedron of the Zn atom (Cl₂N₂) is a distorted tetrahedron. According to the X-ray diffraction data, the crystals of compounds III and IV are isostructural. It is shown by IR spectroscopy that the structures of complexes II–IV are similar to that of complex I. In the solid phase, compounds L and L¹ possess photoluminescence in the visible spectral range (λ_max = 440 and 415 nm, respectively). Complex formation with Zn²⁺ ions does not change the photoluminescence properties of L and L¹.