Synthesis, Investigation, and Molecular  Simulation of Possible Structures  of a Heteroligand Complex of Gadolinium  Stearate With Acetylacetone

Ivanin, S. N.; Panyushkin, V. T.; Buz’ko, V. Yu.; Selivantev, Yu. M.; Kostyrina, T. V.

doi:10.1134/s0022476621010030

Cited by 1 publication

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the IR spectrum of HAp (100 • C) (Figure 5) dried at 100 • C, nitrate group (NO 3 − ; 1315 cm −1 ) and carbonate group (CO 3 2− ; 1416 cm −1 and 827 cm −1 ) bands are present. The vibrations of the OHgroup in HAp (900 • C) (Figure 5) are located at 3570 cm −1 and 631 cm −1 [37,38]. The band around 962 cm −1 is explained by the non-degenerate symmetric vibration of the P-O bond in the phosphate group [39].…”

Section: Resultsmentioning

confidence: 98%

See 1 more Smart Citation

Obtaining Polyvinylpyrrolidone Fibers Using the Electroforming Method with the Inclusion of Microcrystalline High-Temperature Phosphates

Papezhuk,

Ivanin,

Yakupov

et al. 2024

IJMS

View full text Add to dashboard Cite

The results of the synthesis of microcrystalline calcium phosphates such as hydroxoapatite, pyrophosphate, and tricalcium phosphate are presented herein. The influence of the addition of polyvinylpyrrolidone (PVP) on the phase characteristics of the resulting high-temperature ceramic sample is considered. The X-ray results show that hydroxyapatite (HAp) consists of a Ca5(PO4)3(OH) phase, while the sample with the addition of polyvinylpyrrolidone contains β-Ca3(PO4)2 (65.5%) and β-Ca2P2O7 (34.5%) phases calcium phosphates (CPs). IR spectroscopy was used to characterize the compositions of the samples. An important characteristic of the obtained samples is the elemental Ca/P ratio, which was determined via energy-dispersive analysis. The data obtained are consistent with the composition of dental enamel apatites, namely, in the CPs (1.27) and HAp (1.40). SEM was used to study the morphology of the surfaces of hydroxyapatite particles. Polyvinylpyrrolidone polymer fibers were obtained using the electroforming method with the inclusion of CPs in the composition. The fibers were oriented randomly, and nanoscale hydroxyapatite particles were incorporated into the fiber structure. Solubility data of the HAp, CPs, and Fibers in a physiological solution at room temperature and human body temperature were obtained. The solubility of the resulting HAp turned out to be higher than the solubility of the CPs. In turn, the concentration of Ca2+ in a physiological solution of PVP composite fibers with the inclusion of CPs was lower than that in powdered CPs.

show abstract

Section: Resultsmentioning

confidence: 98%

“…The vibrations of the OHgroup in Hap (900 °C) (Figure 5) are located at 3570 cm −1 and 631 cm −1 [37,38]. The band around 962 cm −1 is explained by the non-degenerate symmetric vibration of the P-O bond in the phosphate group [39].…”

Section: Resultsmentioning

confidence: 98%