The Coordination Structure of the Extracted Nickel(II) Complex with a Synergistic Mixture Containing Lix63 and Versatic10

Abstract

In the present work, the nickel(II) synergist complex with isobutyric acid (HLI ) and 5‐hydroxy‐4‐octanone oxime (HBI ), which were the corresponding short‐chain analogs of the active synergistic mixture of Versatic10 (HL) and Lix63 (5,8‐diethyl‐7‐hydroxy‐6‐dodecanoneoxime, HB), was prepared and studied by single‐crystal X‐ray diffraction (XRD). The crystal structure of the nickel(II) synergist complex showed that the composition of the complex was Ni(LI )2(HBI )2 with a cis‐form octahedron geometry structure. Both intra‐ and intermolecular hydrogen bonding were observed in the crystal lattice. Compared with the free ligands, similar band shifts of Fourier transform infrared (FT‐IR) spectra assigned to the stretching vibration of carbon–oxygen single bond (CO), the stretching vibration of carbon–nitrogen double bond (CN), and the disappearance of the scissoring vibration of α‐hydroxy (OH) were correspondingly found in both the nickel(II) synergist complex and the extracted nickel(II) complex in the nonpolar organic phase. Combined with the results from ESI‐MS, XRD, and slope analysis, it was concluded that the major species of the extracted nickel(II) complex in the nonpolar organic phase might possess a similar coordination structure [Ni(HB)2(L)2] as the nickel(II) synergist complex, along with the neutral complex [Ni(HB)(B)2].

Fluorescent Porous Silica Microspheres for Highly and Selectively Detecting Hg2+ and Pb2+ Ions and Imaging in Living Cells

“…The infrared spectra of SiNBB + Hg 2+ , SiNBB + Pb 2+ , SiNBIT + Hg 2+ , and SiNBIO + Hg 2+ clearly show the vibrational band of the C–O (H) bond at 1380 cm –1 . 35,36 This may be because while Hg 2+ or Pb 2+ is coordinated to the nitrogen on C=N, the carbon on C=N interacts with water to form C–O (H) and N bonds Hg 2+ ions. This confirms that SiNBB selectively recognizes the binding sites of Hg 2+ and Pb 2+ on the C=N bond.…”