Supramolecular assemblies of phenyl-pyridyl-triazolopyridine and β-cyclodextrin as sensor of divalent cations in aqueous solution

2015 ◽  
Vol 121 ◽  
pp. 295-301 ◽  
Author(s):  
Carolina Jullian ◽  
Samuel Fernández-Sandoval ◽  
Cristian Celis-Barros ◽  
Belén Abarca ◽  
Rafael Ballesteros ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Divalent Cations ◽  
Supramolecular Assemblies

Ionic association in aqueous solutions of bivalent sulphates

1969 ◽  
Vol 313 (1512) ◽  
pp. 131-147 ◽  
Keyword(s):  
Aqueous Solution ◽  
Osmotic Coefficient ◽  
Dissociation Constants ◽  
Divalent Cations ◽  
Ion Pairs ◽  
Osmotic Coefficients ◽  
Close Approach ◽  
Complete Analysis ◽  
Hydration Water ◽  
Similar Magnitude

Osmotic coefficient data for the sulphates of Mg, Ca, Zn, Ni and Cu in aqueous solution have been analysed to obtain the dissociation constants (d.c.) of ion pairs, triplets and quadruplets, as well as information on their state of hydration. The d.c.’s of the sulphate ion pairs, though of similar magnitude, show distinct individualities, and the trend is similar to that of the d.c.’s calculated for the nitrates of di-valent ions, though the d.c.’s of the latter are about 200 times larger. The d.c.’s of the ion triplets show no correlations, but their absolute values are similar to those calculated from the theory of Fuoss & Kraus (1933, 1935) based on electrostatic considerations. The hydration parameters of the associated sulphates (both pairs and triplets), as characterized in the linear (statistical) terms of the osmotic coefficients, are only slightly smaller than those of the fully dissociated electrolytes, indicating that there is only little loss of hydration water in the process of association, in spite of the heavy hydration of the divalent cations and the relatively close approach of the sulphate ion. The complete analysis of the osmotic coefficient curves makes it possible to calculate the absolute values of the activity coefficients of the divalent sulphates (previously not known to any accuracy).

Supramolecular assemblies of Eu(TPyP)Pc at the air/water and air/Cd2+ aqueous solution interfaces

2003 ◽  
Vol 57 (15) ◽  
pp. 2156-2161 ◽  
Author(s):  
Hong-Guo Liu ◽  
Xu-Sheng Feng ◽  
Li-Juan Zhang ◽  
Jianzhuang Jiang ◽  
Yong-Ill Lee ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Supramolecular Assemblies

Equilibria in aqueous solution between divalent cations and the α-amino acid 2-(benzylamino)-2-deoxy-d-glycero-d-gulo-heptonic acid

Polyhedron ◽  
1992 ◽  
Vol 11 (5) ◽  
pp. 563-566 ◽  
Author(s):  
C. Valenzuela-Calahorro ◽  
M.A. Díaz-Díez ◽  
E. Sabio-Rey ◽  
F.J. García-Barros ◽  
E. Román-Galán
Keyword(s):  
Aqueous Solution ◽  
Amino Acid ◽  
Divalent Cations ◽  
Equilibria In Aqueous Solution

Morphology transformation of self-assembled organic nanomaterials in aqueous solution induced by stimuli-triggered chemical structure changes

2017 ◽  
Vol 5 (31) ◽  
pp. 16059-16104 ◽  
Author(s):  
Wenbo Zhang ◽  
Changyou Gao
Keyword(s):  
Aqueous Solution ◽  
Chemical Structure ◽  
Supramolecular Assemblies ◽  
Structure Changes ◽  
Self Assembled ◽  
Organic Nanomaterials

Morphology transformation of supramolecular assemblies is implemented under “green” triggers, namely pH, light, and CO2, resulting in novel organic nanomaterials with well-defined structures and functions.

The relative stabilities of A- and B-type carbonate substitution in apatites synthesized in aqueous solution

2016 ◽  
Vol 80 (6) ◽  
pp. 977-983 ◽  
Author(s):  
C. H. Yoder ◽  
N. T. Landes ◽  
L. K. Tran ◽  
A. K. Smith ◽  
J. D. Pasteris
Keyword(s):  
Aqueous Solution ◽  
Inductively Coupled Plasma ◽  
Divalent Cations ◽  
Atomic Emission ◽  
Monovalent Cation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inductively Coupled ◽  
Carbonate Substitution ◽  
Type Substitution

AbstractCarbonated calcium apatites doped with a monovalent cation (Li+, Na+, or K+) or a divalent cation (Mg2+ or Zn2+) were prepared in aqueous solution and analysed by powder X-ray diffraction, inductively coupled plasma atomic emission spectroscopy and infrared spectroscopy. The hypothesis that the location of carbonate in the apatite structure, either in place of hydroxide ions in the c-axis channels (A-type substitution) or in place of phosphate (B-type substitution), is affected by the solution energetics of the cation (specifically its enthalpy of hydration) was strengthened by the observation of larger amounts of Atype carbonate in apatites containing the monovalent cations in aqueous solution. It is shown that cations with low negative enthalpies of hydration favour A-type substitution, whereas cations with higher negative hydration enthalpies, such as divalent cations (Mg2+, Zn2+), favour B-type substitution.

scholarly journals The hydration of divalent cations in aqueous solution. An X-ray investigation with isomorphous replacement

1970 ◽  
Vol 3 (6) ◽  
pp. 486-492 ◽  
Author(s):  
W. Bol ◽  
G. J. A. Gerrits ◽  
C. L. van Panthaleon Eck
Keyword(s):  
Aqueous Solution ◽  
Divalent Cations ◽  
X Ray ◽  
Isomorphous Replacement

Interaction of Univalent and Divalent Cations with Carrageenans in Aqueous Solution

1977 ◽  
Vol 10 (1) ◽  
pp. 197-201 ◽  
Author(s):  
G. Pass ◽  
G. O. Phillips ◽  
D. J. Wedlock
Keyword(s):  
Aqueous Solution ◽  
Divalent Cations

Interaction of three pradimicin derivatives with divalent cations in aqueous solution

2000 ◽  
Vol 56 (6) ◽  
pp. 1233-1243 ◽  
Author(s):  
Mei Hu ◽  
Yasuko Ishizuka ◽  
Yasuhiro Igarashi ◽  
Toshikazu Oki ◽  
Hiroshi Nakanishi
Keyword(s):  
Aqueous Solution ◽  
Divalent Cations
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