Interaction of d-glucose with alkaline-earth metal ions. Synthesis, spectroscopic, and structural characterization of Mg(II)- and Ca(II)-d-glucose adducts and the effect of metal-ion binding on anomeric configuration of the sugar

1988 ◽  
Vol 183 (1) ◽  
pp. 35-46 ◽  
Author(s):  
Heidar-Ali Tajmir-Riahi
Keyword(s):  
Structural Characterization ◽  
Metal Ion ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Ion Binding ◽  
Metal Ion Binding ◽  
Anomeric Configuration ◽  
Alkaline Earth Metal Ions

scholarly journals Alkali and alkaline earth metal ion binding by a foldamer capsule: selective recognition of magnesium hydrate

2017 ◽  
Vol 53 (67) ◽  
pp. 9300-9303 ◽  
Author(s):  
Pedro Mateus ◽  
Barbara Wicher ◽  
Yann Ferrand ◽  
Ivan Huc
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Selective Recognition ◽  
Alkaline Earth Metal ◽  
Ion Binding ◽  
Metal Ion Binding

A foldamer capsule selectively recognizes some metal ions solely through second-sphere coordination.

Interaction of Alkaline Earth Metal Ions with Acetic and Lactic Acid in Aqueous Solutions Studied by 13C NMR Spectroscopy

1997 ◽  
Vol 52 (4) ◽  
pp. 351-357 ◽  
Author(s):  
A. Kondoh ◽  
T. Oi
Keyword(s):  
Lactic Acid ◽  
Nmr Spectroscopy ◽  
Metal Ion ◽  
Alkaline Earth ◽  
Isotope Effects ◽  
Earth Metal ◽  
Ion Concentration ◽  
Alkaline Earth Metal ◽  
Hydroxyl Groups ◽  
Alkaline Earth Metal Ions

Abstract Interaction of alkaline earth metal (magnesium, calcium, strontium and barium) ions with acetic and lactic acid in aqueous media was investigated by 13C NMR spectroscopy. In the acetate systems, signals whose chemical shifts were the averages of those of the free and bound acetate ions were observed. Downfield shifts of the carboxylate carbon signals with increasing metal ion concentration indicated that the acetate ion acted as a monodentate ligand coordinating to the metal ion using the carboxylate group. The metal ion concentration dependence of the peak positions of the methine and carboxylate carbon signals of the lactate ion in the lactate systems suggested that the lactate ion coordinated to a metal ion using the carboxylate and hydroxyl groups. Unique upfield shifts upon complexation in the magnesium lactate systems suggested that the lactate ion coordinated to the magnesium ion from outside the primary hydration sphere.The present results were consistent with the isotope effects of the alkaline earth metals observed in cation exchange chromatography.

Metal Ion Binding to Calixarenes: Pendent Arm Coordination Assisted by Self-Inclusion

1994 ◽  
Vol 47 (6) ◽  
pp. 1185 ◽  
Author(s):  
JM Harrowfield ◽  
M Mocerino ◽  
BW Skelton ◽  
CR Whitaker ◽  
AH White
Keyword(s):  
Structural Characterization ◽  
Metal Ion ◽  
Room Temperature ◽  
Ion Binding ◽  
Metal Ion Binding ◽  
Cone Conformation ◽  
X Ray ◽  
Partial Cone ◽  
Arm Coordination

The synthesis and room-temperature single-crystal X-ray structural characterization of 25,27- di(allyloxy)-5,17-di-t-butyl-26,28-dimethoxycalix[4]arene are recorded. Crystals are monoclinic, C2/c, a 29.089(5), b 10.742(2), c 26.218(8) Ǻ, β 110.09(2)°, Z = 8; the structure was refined to a residual of 0.065 for 4103 independent 'observed' [I > 3σ(I)] reflections. The flattened partial cone conformation of the molecule allows inclusion of one of the methoxy substituents in a way which could block inclusion of a metal ion capable of polyhapto aromatic coordination and which may therefore explain why solution n.m.r. measurements indicate that silver(I) binds to the pendent alkene groups.

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