Complex formation between UO₂²⁺and α-isosaccharinic acid: insights on a molecular level

Abstract

This study elucidates the mutual influence of the interaction of ISA with UO22+ on their speciation, based on spectroscopic techniques.

Thermodynamic interpretation of zirconium solubility in the presence of hydroxyacetic, 3-hydroxypropionic, and 2,3-dihydroxypropanoic acids

“…] n stoichiometry, as suggested for U(VI) [23]. The log β°1 42 values for O20 and O201 in Table 1 are a few orders of magnitude smaller than those for GLU and ISA.…”

Nondestructive Recovery of Cotton from Waste Polycotton Textiles by Catalytic Hydrolysis

“…Additionally, 1 H NMR spectra of recycled TPA after alkaline hydrolysis in NaOH solution (0.5 and 1.0 M) showed peaks around 3.5 ppm (Figure S7), characteristic for protons of isosaccharinic acid. 40 The decreased viscosities and the appearance of isosaccharinic acid in the products indicate the occurrence of the peeling reaction in a concentrated alkaline solution, which is consistent with low cotton recovery rates observed in Figure 2b.…”

“…In contrast, the intrinsic viscosities of recycled cotton by hydrolysis without a catalyst in NaOH solution (0.5, 1.0, and 5.0 M) were only 42, 47, and 60% of that of the original one, respectively (Figure S6). Additionally, 1 H NMR spectra of recycled TPA after alkaline hydrolysis in NaOH solution (0.5 and 1.0 M) showed peaks around 3.5 ppm (Figure S7), characteristic for protons of isosaccharinic acid . The decreased viscosities and the appearance of isosaccharinic acid in the products indicate the occurrence of the peeling reaction in a concentrated alkaline solution, which is consistent with low cotton recovery rates observed in Figure b.…”

Evaluation of thermodynamic model of Pd(II) complex formation with isosaccharinic acid

“…As no precipitation was visually observed in the solution before measurement, Pd is expected to be present in the solution forming Pd-ISA complexes. The spectrum of the ISA stock solution has many characteristic peaks; however, we focused on the peaks at 1583, 1413, and 1000-1150 cm − 1 , corresponding to the asymmetric stretching vibration of the carboxylate group (ν as (COO − )), symmetric stretching vibration of the carboxylate group (ν s (COO − )), and binding vibration of C-OH (alcohol) (ν(C-OH)), respectively [15].…”