共查询到20条相似文献,搜索用时 31 毫秒
1.
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+(aq) + 1·Cs+(nb) ? 1·M+(nb) + Cs+(aq) taking place in the two-phase water–nitrobenzene system (M+ = Li+, Na+, H+, NH4 +, Ag+, K+, Rb+, Tl+; 1 = dibenzo-30-crown-10; aq = aqueous phase, nb = nitrobenzene phase) were determined. Furthermore, the stability constants of the 1·M+ complexes in water-saturated nitrobenzene were calculated; they were found to increase in the series of Cs+ < H+, Ag+ < NH4 + < Na+ < Rb+ < Li+ < K+, Tl+. 相似文献
2.
Emanuel Makrlík Pavel Selucky Petr Vaňura Petr Toman 《Journal of inclusion phenomena and macrocyclic chemistry》2012,73(1-4):329-333
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+(aq)?+?1·Cs+(nb) ? 1·M+(nb)?+?Cs+(aq) taking place in the two-phase water–nitrobenzene system (M+?=?Li+, Na+, K+, Rb+, H3O+, NH4 +, Tl+; 1?=?beauvericin; aq?=?aqueous phase, nb?=?nitrobenzene phase) were determined. Moreover, the stability constants of the 1·M+ complexes in water-saturated nitrobenzene were calculated; they were found to increase in the series of Rb+?<?Na+, H3O+?<?Tl+?<?NH 4 +? <?K+?<?Li+. 相似文献
3.
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium
M+ (aq) + 1·Na+ (nb) ⇔ 1·M+ (nb) + Na+ (aq) taking place in the two-phase water–nitrobenzene system (M+ = Li+, H3O+, NH4 + {\rm NH}_{4}^{ + } , Ag+, K+, Rb+, Tl+, Cs+; 1 = barium ionophore I; aq = aqueous phase, nb = nitrobenzene phase) were determined. Furthermore, the stability constants
of the 1·M+ complexes in water-saturated nitrobenzene were calculated; they were found to increase in the series of Cs+ < Rb+ < NH4 + {\rm NH}_{4}^{ + } , K+ < H3O+ < Na+ < Ag+, Tl+ < Li+. 相似文献
4.
E. Makrlík P. Selucky P. Vaňura P. Toman R. Rathore 《Journal of Radioanalytical and Nuclear Chemistry》2011,287(2):497-500
From extraction experiments and γ-activity measurements, the extraction constants corresponding to the general equilibrium M+(aq) + 1·Cs+(nb)
\rightleftarrows \rightleftarrows
1·M+(nb) + Cs+(aq) taking part in the two-phase water–nitrobenzene system (1 = hexaarylbenzene-based receptor; M+ = H3O+, NH4
+, Ag+, K+, Rb+, Tl+; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Furthermore, the stability constants of the ML+ complex species in nitrobenzene saturated with water were calculated; they were found to increase in the series of Rb+ < K+ < Ag+, Tl+ < H3O+, NH4
+. 相似文献
5.
Y. Toh M. Oshima M. Koizumi A. Kimura Y. Hatsukawa 《Journal of Radioanalytical and Nuclear Chemistry》2008,276(1):217-220
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+(aq)+NaL+(nb)⇔ML+(nb)+Na+(aq) taking place in the two-phase water-nitrobenzene system [M+=Li+, K+, Rb+, Cs+; L = p-tert-butylcalix[4]arene-tetrakis (N, N-dimethylthioacetamide); aq = aqueous phase, nb = nitrobenzene phase] were evaluated. Furthermore,
the stability constants of the ML+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the cation order Cs+<Rb+<K+<Li+<Na+. 相似文献
6.
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+(aq)+CsL+(nb)⇔ML+(nb)+Cs+(aq) taking place in the two-phase water-nitrobenzene system (M+ = Li+, Na+, K+, Rb+; L = hexaethyl p-tert-butylcalix[6]arene hexaacetate; aq = aqueous phase, nb = nitrobenzene phase) were determined. Moreover, the stability constants
of the ML+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the cation order Rb+<Cs+<K+<Na+<Li+. 相似文献
7.
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+(aq)+NaL+(nb)⇔ML+(nb)+Na+(aq) taking place in the two-phase water-nitrobenzene system (M+ = H+, NH4+, Ag+, Tl+; L = tetramethyl p-tert-butylcalix[4]arene tetraketone; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Moreover, the stability constants
of the ML+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the order Tl+<NH4+<Ag+ <H+ <Na+. 相似文献
8.
Summary From extraction experiments and g-activity measurements, the exchange extraction constants corresponding to the general equilibrium
M+(aq) + CsL+(nb) ? ML+(nb) + Cs+(aq) taking place in the two-phase water-nitrobenzene system (M+ = NH, K+, Rb+, Tl+; L = dibenzo-21-crown-7; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Further, the stability constants of
the ML+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the order Cs+<K+ = Rb+?NH<Tl+. 相似文献
9.
Emanuel Makrlík Pavel Selucký Petr Vaňura 《Journal of inclusion phenomena and macrocyclic chemistry》2013,76(1-2):13-17
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+ (aq) + 1·Cs+ (nb) ? 1·M+ (nb) + Cs+ (aq) taking place in the two-phase water–nitrobenzene system (M+ = Ag+, K+, Rb+, Tl+; 1 = 1,3-alternate-25,27-bis(1-octyloxy)calix[4]arene-crown-6; aq is aqueous phase, nb is nitrobenzene phase) were determined. Moreover, the stability constants of the 1·M+ complexes in water-saturated nitrobenzene were calculated; they were found to increase in the series of K+ < Rb+ < Ag+ < Tl+. 相似文献
10.
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium
M+(aq)+NaL+(nb)⇔ML+(nb)+Na+(aq) taking place in the two-phase water-nitrobenzene system (M+ = Li+, H3O+, NH4+, Ag+; L = hexaethyl calix[6]arene hexaacetate; aq = aqueous phase, nb = nitrobenzene phase) were determined. Furthermore, the
stability constants of the ML+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the cation order H3O+<NH4+<Li+<Ag+. 相似文献
11.
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium
M+(aq)+NaL+(nb)⇄ML+(nb)+Na+(aq) taking place in the two-phase water-nitrobenzene system (M+=Li+, K+, Rb+, Cs+; L=dibenzo-24-crown-8; aq=aqueous phase, nb=nitrobenzene phase) were evaluated. Further, the stability constants of the ML+ complexes in nitrobenzene saturated with water were calculated; they were found to increase in the Cs+Rb+L+Na+ order. 相似文献
12.
E. Makrlík P. Vaňura M. Daňková 《Journal of Radioanalytical and Nuclear Chemistry》1999,240(2):579-583
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium
M+(aq)+NaL+(nb)⇄ML+(nb)+Na+(aq) taking place in the two-phase water-nitrobenzene system (M+=Li+, K+, Rb+, Cs+; L=18-crown-6; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. The stability constants of the ML+ complexes in nitrobenzene saturated with water were calculated; they are found to increase in the cation order Cs+Li+Na+Rb+K+. Further, the individual extraction constants for the NaL+, KL+, RbL+ and CsL+ complex species in the wate-nitrobenzene system were determined; their values increase in the series Na+Rb+Cs+K+. 相似文献
13.
E. Makrlík P. Vaňura P. Selucký 《Journal of Radioanalytical and Nuclear Chemistry》2011,287(1):151-155
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium
M+(aq) + Cs+(org) ⟺ M+(org) + Cs+(aq) taking place in the two-phase water–phenyltrifluoromethyl sulfone (abbrev. FS 13) system (M+ = Li+, H3O+, Na+, NH4+ \hbox{NH}_{4}{}^{+} , Ag+, Tl+, K+, Rb+; aq = aqueous phase, org = FS 13 phase) were evaluated. Furthermore, the individual extraction constants of the M+ cations in the mentioned two-phase system were calculated; they were found to increase in the series of Li+ < H3O+ < Na+< NH4 + \hbox{NH}_{4}{}^{ + } < Ag+ < Tl+ < K+ < Rb+ < Cs+. 相似文献
14.
E. Makrlík P. Selucký P. Vaňura B. A. Moyer 《Journal of Radioanalytical and Nuclear Chemistry》2013,295(2):1015-1018
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+ (aq) + CsL+ (nb) ? ML+ (nb) + Cs+ (aq) taking place in the two–phase water–nitrobenzene system (M+ = K+, Rb+, $ {\text{NH}}_{4}^{ + } $ , Ag+, Tl+; L = calix[4]arene-bis(t-octylbenzo-18-crown-6); aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Furthermore, the stability constants of the ML+ complexes in nitrobenzene saturated with water were calculated; they were found to increase in the following cation order: $ {\text{NH}}_{4}^{ + } $ < K+ < Ag+ < Rb+ < Tl+. 相似文献
15.
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+ (aq) + NaL+ (nb) ⇔ ML+ (nb) + Na+ (aq) taking place in the two-phase water–nitrobenzene system (M+ = H3O+,
\textNH4+ {\text{NH}}_{4}{}^{+} , Ag+, Tl+; L = hexaethyl p-tert-butylcalix[6]arene hexaacetate; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Furthermore, the stability constants
of the ML+ complexes in nitrobenzene saturated with water were calculated; they were found to increase in the following order:
\textAg + < NH4 + < \textH 3 \textO + < \textNa + < \textTl + . {\text{Ag}}^{ + } \, < \,\hbox{NH}_{4}{}^{ + } \, < \,{\text{H}}_{ 3} {\text{O}}^{ + } \, < \,{\text{Na}}^{ + } \, < \,{\text{Tl}}^{ + }. 相似文献
16.
E. Makrlík P. Selucký P. Vaňura B. A. Moyer 《Journal of Radioanalytical and Nuclear Chemistry》2013,295(3):2171-2174
From extraction experiments and $ \gamma $ -activity measurements, the exchange extraction constants corresponding to the general equilibrium M+ (aq) + NaL+ (nb) ? ML+ (nb) + Na+ (aq) taking place in the two–phase water–nitrobenzene system (M+= Li+, H3O+, NH4 +; L = calix[4]arene-bis(t-octylbenzo-18-crown-6); aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Furthermore, the stability constants of the ML+ complexes in nitrobenzene saturated with water were calculated; they were found to increase in the following cation order: H3O+ < Li+ < NH4 +. 相似文献
17.
Summary From extraction experiments andg-activity measurements, the extraction constant corresponding to the Ag+(aq) + NaL+(nb)?AgL+(nb) + Na+(aq) equilibrium in the two-phase water-nitrobenzene system (L=valinomycin; aq=aqueous phase, nb=nitrobenzene phase) was evaluated
as log Kex(Ag+,NaL+)=-0.6±0.1. The stability constant of the valinomycin-silver complex in nitrobenzene saturated with water was calculated:
log bnb(AgL+)=4.6±0.1. The stability constants of complexes of some univalent cations with valinomycin were summarized and discussed. 相似文献
18.
Emanuel Makrlík Petr Vaňura Jan Budka Pavel Selucky 《Monatshefte für Chemie / Chemical Monthly》2010,287(3):31-33
Abstract
From extraction experiments in the two-phase water–nitrobenzene system and γ-activity measurements, the stability constants of the tetraethyl p-tert-butyltetrathiacalix[4]arene tetraacetate (cone)·M+ complexes (M+ = Li+, H3O+, NH4 +, Ag+, or K+) were determined in water-saturated nitrobenzene. It was found that these constants increase in the cation order NH4 + < K+ < H3O+ < Ag+ < Li+ < Na+. 相似文献19.
The extraction of micro amounts of cesium by nitrobenzene solutions of sodium, potassium and rubidium dicarbollylcobaltates
(M+B−;M+=Na+,K+,Rb+) has been investigated in the presence of 2,3-naphtho-15-crown-5 (N15C5, L). The equilibrium data were explained by assuming
that ML+ and ML2+ complexes (M+=Na+,K+,Rb+, Cs+; L=N15C5) were present in the organic phase. The stability constants of the complex species ML+ and ML2+ have been determined in nitrobenzene saturated with water. It was found that the stability of the complex cation ML+ (where M+=Na+,K+,Rb+, Cs+; L=N15C5) in water-saturated nitrobenzene solutions increases along the series Cs+<Rb+<K+<Na+, whereas that of the species ML2+ in the same medium increases in the order Cs+<Rb+<Na+<K+. 相似文献
20.
Summary From extraction experiments and γ-activity measurements, the extraction constant corresponding to the equilibrium Li+(aq)+NaL+(nb) ↔LiL+(nb)+Na+(aq) taking place in the two-phase water-nitrobenzene system (L = valinomycin; aq = aqueous phase, nb = nitrobenzene phase)
was evaluated as logKex(Li+,NaL+)=-1.1. Further, the stability constant of the valinomycin-lithium complex species in nitrobenzene saturated with water was
calculated: logβnb(LiL+)=6.3. 相似文献