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

Abstract

In the present work, the cobalt(II) synergist complex with isobutyric acid (HLI) and 5‐hydroxy‐4‐octanone oxime (HBI), which were the corresponding short‐chain analogs of active synergistic mixture of Versatic10 (HL) and Lix63 (5,8‐diethyl‐7‐hydroxy‐6‐dodecanoneoxime, HB), was prepared and studied by X‐ray single‐crystal diffraction. The crystal structure of the cobalt(II) synergistic complex showed that the composition of the complex was Co(HBI)2(LI)2 with a cis‐form octahedron geometry structure. Both intra and intermolecular hydrogen bonding between the uncoordinated carbonyl oxygen atom of the deprotonated monodentate anionic ligand LI and the hydrogen atom of the α‐hydroxy or the oxime hydroxyl group of HBI were observed in the crystal lattice. In order to bridge the gap between the solid‐state structure of the cobalt(II) synergist complex and the solution structure of the extracted cobalt(II) complex with the actual synergistic mixture containing Versatic10 and Lix63 in the nonpolar organic phase, both the cobalt(II) synergistic complex and the extracted cobalt(II) complex were further investigated by Fourier transform infrared spectroscopy (FT‐IR) and electrospray ionization mass spectrometry (ESI‐MS). The results indicated that the extracted cobalt(II) complex in the nonpolar organic phase might possess a similar coordination structure as that of the cobalt(II) synergist complex.

Process optimization and mechanism for the selective extraction of copper(ii) from polymetallic acidic solutions using a polymer inclusion membrane (PIM) with Mextral®5640H as the carrier

“…[11][12][13] Among these, solvent extraction is widely applied to selectively recover and separate valuable metals from complex mixtures. For example, Cheng and his colleagues [14][15][16][17][18][19] focused on the separation of precious metals using a combination of two extractants, Versatic10 and Lix63. They successfully extracted Cu 2+ , Co 2+ , Ni 2+ and Zn 2+ into the organic phase, leaving impurities in the aqueous phase.…”

Metal-ion-mediated synergistic coordination: construction of AIE-metallogel sensor arrays for anions and amino acids

“…Utilizing the synergistic effect between cations and anions is a new strategy to design functional materials with novel properties, which has broadened the application of functional materials. There have been lots of studies on synergistic coordination recently, which have been broadly applied in wide-ranging fields, such as fluorescence sensing, 33 drug release, 34 crystal engineering, 35 materials synthesis, 36 etc. Since metallogels show great potential in the detection of multi-analytes, as part of our research interest in supramolecular smart materials, [37][38][39][40][41] we introduced the ''synergistic coordination'' strategy for the construction of AIE metallogels and reported the excellent anion and amino acid sensors' properties (Scheme 1).…”