Study of the hydrolytic properties of the trivalent Y-ion in chloride medium
Само за регистроване кориснике
2016
Аутори
Petrović, ĐorđeJakovljević, Ivan
Joksović, Ljubinka G.
Szecsenyi, Katalin Meszaros
Durdevic, Predrag
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Hydrolysis reactions of YCl3 aqueous solutions were studied by potentiometric titrations at 310 K in the pH range ca.3-9 and total Y3+ ion concentration range 0.5-10.0 mmol/dm(3). The experimental data were evaluated with the aid of the Hyperquad2006 suite of programs, which indicated the formation of the following hydrolytic complexes (log conc. overall stability constants beta(p,q) defined as beta(p,q) = M-p(OH)(q)[H](q)/[M](p)), Y(OH)(2+) (-7.71(2)); Y(OH)(2)(+) (-16.42(2)); Y(OH)(3) (-26.01(3)); Y-2(OH)(2)(4+) (-14.23(4)); Y-3(OH)(5)(2+) (-34.20 (4)); Y-4(OH)(6)(2+) (-37.10(5)). The hydrolysis of the Y3+ ion was also monitored by electrospray ionization ion-trap mass spectrometry (ESI-MS) in the pH range 2.63-7.10. The influence of the sample cone voltage on the product distribution was significant, indicating the contribution of ion source fragmentation reactions. The optimal cone voltage was set to 70 V for cationic and 100 V for anionic spectra. The cationic and anionic ESI mass... spectra of the Y3+ solutions produced strong evidence for the presence of a variety of monomeric and polymeric hydrolytic complexes. The Cl- ion appeared to be a strong competitor to the OH- ion for the oxo-yttrium core. The hydrolytic precipitation reactions with NaOH or urea as precipitating agents were studied. The obtained precipitates were characterized by the potentiometric technique, elemental analysis, thermal analysis (TG-DSC), infrared spectroscopy, X-ray diffractions and the SEM technique. Hydrothermal synthesis of the precipitate in an autoclave at T= 420 K and P = 10 bar with NaOH as the precipitating agent produced a crystalline precipitate in the form of hexagonal needles (P6(3)/m space group). At atmospheric pressure only an amorphous precipitate was produced with both precipitating agents. The concentration solubility product K-so* of Y(OH)(3) was evaluated from the potentiometric titrations curves and logK(so)* = -22.85(4). The synthesized precipitate with NaOH as a precipitating agent had a composition of Y(OH)(3)center dot 2H(2)O, while the amorphous precipitate obtained with urea had a composition of Y-2(OH)(2)(CO3)(2)center dot 3H(2)O. (C) 2015 Elsevier Ltd. All rights reserved.
Кључне речи:
Yttrium / Hydrolysis / Hydroxide / Stability constants / SynthesisИзвор:
Polyhedron, 2016, 105, 1-11Финансирање / пројекти:
- Синтеза, моделовање, физичко-хемијске и биолошке особине органских једињења и одговарајућих комплекса метала (RS-172016)
DOI: 10.1016/j.poly.2015.11.047
ISSN: 0277-5387
WoS: 000370900600001
Scopus: 2-s2.0-84952667609
Колекције
Институција/група
VinčaTY - JOUR AU - Petrović, Đorđe AU - Jakovljević, Ivan AU - Joksović, Ljubinka G. AU - Szecsenyi, Katalin Meszaros AU - Durdevic, Predrag PY - 2016 UR - https://vinar.vin.bg.ac.rs/handle/123456789/276 AB - Hydrolysis reactions of YCl3 aqueous solutions were studied by potentiometric titrations at 310 K in the pH range ca.3-9 and total Y3+ ion concentration range 0.5-10.0 mmol/dm(3). The experimental data were evaluated with the aid of the Hyperquad2006 suite of programs, which indicated the formation of the following hydrolytic complexes (log conc. overall stability constants beta(p,q) defined as beta(p,q) = M-p(OH)(q)[H](q)/[M](p)), Y(OH)(2+) (-7.71(2)); Y(OH)(2)(+) (-16.42(2)); Y(OH)(3) (-26.01(3)); Y-2(OH)(2)(4+) (-14.23(4)); Y-3(OH)(5)(2+) (-34.20 (4)); Y-4(OH)(6)(2+) (-37.10(5)). The hydrolysis of the Y3+ ion was also monitored by electrospray ionization ion-trap mass spectrometry (ESI-MS) in the pH range 2.63-7.10. The influence of the sample cone voltage on the product distribution was significant, indicating the contribution of ion source fragmentation reactions. The optimal cone voltage was set to 70 V for cationic and 100 V for anionic spectra. The cationic and anionic ESI mass spectra of the Y3+ solutions produced strong evidence for the presence of a variety of monomeric and polymeric hydrolytic complexes. The Cl- ion appeared to be a strong competitor to the OH- ion for the oxo-yttrium core. The hydrolytic precipitation reactions with NaOH or urea as precipitating agents were studied. The obtained precipitates were characterized by the potentiometric technique, elemental analysis, thermal analysis (TG-DSC), infrared spectroscopy, X-ray diffractions and the SEM technique. Hydrothermal synthesis of the precipitate in an autoclave at T= 420 K and P = 10 bar with NaOH as the precipitating agent produced a crystalline precipitate in the form of hexagonal needles (P6(3)/m space group). At atmospheric pressure only an amorphous precipitate was produced with both precipitating agents. The concentration solubility product K-so* of Y(OH)(3) was evaluated from the potentiometric titrations curves and logK(so)* = -22.85(4). The synthesized precipitate with NaOH as a precipitating agent had a composition of Y(OH)(3)center dot 2H(2)O, while the amorphous precipitate obtained with urea had a composition of Y-2(OH)(2)(CO3)(2)center dot 3H(2)O. (C) 2015 Elsevier Ltd. All rights reserved. T2 - Polyhedron T1 - Study of the hydrolytic properties of the trivalent Y-ion in chloride medium VL - 105 SP - 1 EP - 11 DO - 10.1016/j.poly.2015.11.047 ER -
@article{ author = "Petrović, Đorđe and Jakovljević, Ivan and Joksović, Ljubinka G. and Szecsenyi, Katalin Meszaros and Durdevic, Predrag", year = "2016", abstract = "Hydrolysis reactions of YCl3 aqueous solutions were studied by potentiometric titrations at 310 K in the pH range ca.3-9 and total Y3+ ion concentration range 0.5-10.0 mmol/dm(3). The experimental data were evaluated with the aid of the Hyperquad2006 suite of programs, which indicated the formation of the following hydrolytic complexes (log conc. overall stability constants beta(p,q) defined as beta(p,q) = M-p(OH)(q)[H](q)/[M](p)), Y(OH)(2+) (-7.71(2)); Y(OH)(2)(+) (-16.42(2)); Y(OH)(3) (-26.01(3)); Y-2(OH)(2)(4+) (-14.23(4)); Y-3(OH)(5)(2+) (-34.20 (4)); Y-4(OH)(6)(2+) (-37.10(5)). The hydrolysis of the Y3+ ion was also monitored by electrospray ionization ion-trap mass spectrometry (ESI-MS) in the pH range 2.63-7.10. The influence of the sample cone voltage on the product distribution was significant, indicating the contribution of ion source fragmentation reactions. The optimal cone voltage was set to 70 V for cationic and 100 V for anionic spectra. The cationic and anionic ESI mass spectra of the Y3+ solutions produced strong evidence for the presence of a variety of monomeric and polymeric hydrolytic complexes. The Cl- ion appeared to be a strong competitor to the OH- ion for the oxo-yttrium core. The hydrolytic precipitation reactions with NaOH or urea as precipitating agents were studied. The obtained precipitates were characterized by the potentiometric technique, elemental analysis, thermal analysis (TG-DSC), infrared spectroscopy, X-ray diffractions and the SEM technique. Hydrothermal synthesis of the precipitate in an autoclave at T= 420 K and P = 10 bar with NaOH as the precipitating agent produced a crystalline precipitate in the form of hexagonal needles (P6(3)/m space group). At atmospheric pressure only an amorphous precipitate was produced with both precipitating agents. The concentration solubility product K-so* of Y(OH)(3) was evaluated from the potentiometric titrations curves and logK(so)* = -22.85(4). The synthesized precipitate with NaOH as a precipitating agent had a composition of Y(OH)(3)center dot 2H(2)O, while the amorphous precipitate obtained with urea had a composition of Y-2(OH)(2)(CO3)(2)center dot 3H(2)O. (C) 2015 Elsevier Ltd. All rights reserved.", journal = "Polyhedron", title = "Study of the hydrolytic properties of the trivalent Y-ion in chloride medium", volume = "105", pages = "1-11", doi = "10.1016/j.poly.2015.11.047" }
Petrović, Đ., Jakovljević, I., Joksović, L. G., Szecsenyi, K. M.,& Durdevic, P.. (2016). Study of the hydrolytic properties of the trivalent Y-ion in chloride medium. in Polyhedron, 105, 1-11. https://doi.org/10.1016/j.poly.2015.11.047
Petrović Đ, Jakovljević I, Joksović LG, Szecsenyi KM, Durdevic P. Study of the hydrolytic properties of the trivalent Y-ion in chloride medium. in Polyhedron. 2016;105:1-11. doi:10.1016/j.poly.2015.11.047 .
Petrović, Đorđe, Jakovljević, Ivan, Joksović, Ljubinka G., Szecsenyi, Katalin Meszaros, Durdevic, Predrag, "Study of the hydrolytic properties of the trivalent Y-ion in chloride medium" in Polyhedron, 105 (2016):1-11, https://doi.org/10.1016/j.poly.2015.11.047 . .