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1.
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
2.
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
3.
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
4.
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
5.
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
6.
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
7.
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
8.
Emanuel Makrlík Jan Budka Petr Vaňura Jiří Dybal 《Monatshefte für Chemie / Chemical Monthly》2008,139(11):1349-1351
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the equilibrium
M
+(aq) + 1 · Na+ (nb) ⇄ 1 · M
+ (nb) + Na+ (aq) taking place in the two-phase water-nitrobenzene system (M
+ = Li+, H3O+, NH4
+, Ag+, K+, Rb+, Tl+, Cs+; 1 = tetraphenyl p-tert-butylcalix[4]arene tetraketone; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Moreover, the stability constants
of the 1 · M
+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the order Cs+ < Rb+ < Tl+ < K+ < NH4
+ < Ag+ < H3O+ < Li+.
Correspondence: Emanuel Makrlík, Faculty of Applied Sciences, University of West Bohemia, Pilsen, Czech Republic. 相似文献
9.
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
10.
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
11.
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
12.
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M2+(aq)+SrL2+(nb)⇔ML2+(nb)+Sr2+(aq) taking place in the two-phase water-nitrobenzene system (M2+ = Mg2+, Zn2+, Mn2+; L = valinomycin; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Further, the stability constants of the ML2+ complexes in water saturated nitrobenzene were calculated. They were found to increase in the order of Mg2+<Mn2+<Zn2+. 相似文献
13.
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
14.
E. Makrlík J. Budka P. Vaňura P. Selucký 《Journal of Radioanalytical and Nuclear Chemistry》2008,277(2):487-490
From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium
M2+(aq)+SrL2+(nb)⇔ML2+(nb)+Sr2+(aq) taking place in the two-phase water-nitrobenzene system (M2+ = Ba2+, Pb2+, Cd2+; L = tetramethyl p-tert-butylcalix[4]arene tetraketone; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Moreover, the stability constants
of the ML2+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the order Ba2+<Cd2+<Pb2+. 相似文献
15.
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
16.
From extraction experiments and γ-activity measurements, the extraction constant corresponding to the equilibrium Na+(aq)+HL+(nb)⇆NaL+(nb)+H+(aq) taking place in the two-phase water-nitrobenzene system (L=18-crown-6; aq=aqueous phase, nb=nitrobenzene phase) was evaluated
as logK
ex
(Na+,HL+)=0.1. Further, the stability constant of the 18-crown-6-sodium complex in nitrobenzene saturated with water was calculated:
logβ
nh(NaL+)=8.0. 相似文献
17.
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
18.
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
19.
M. Daňková E. Makrlík P. Vaňura 《Journal of Radioanalytical and Nuclear Chemistry》1997,221(1-2):251-253
From the extraction experiments and -activity measurements, the extraction constant corresponding to the Rb+(aq)+CsL+(nb)RbL+(nb)+Cs+(aq) equilibrium in the two-phase water-nitrobenzene system (L=valinomycin; aq=aqueous phase, nb=nitrobenzene phase) was evaluated in the form logK
ex (Rb+, CsL+)=0.9. Further, the stability constant of the valinomycin-rubidium complex in nitrobenzene saturated with water was calculated as log nb(RbL+)=11.7. 相似文献
20.
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