scholarly journals Effect of ionic strength on complex equillieria between lanthanide metal ions and substituted pyrazole in dioxane -water mixture

2012 ◽  
Vol 6 (2) ◽  
pp. 559-563 ◽  
Author(s):  
G.H. Murhekar ◽  
M.L. Narwade ◽  
A.R. Raut
Keyword(s):  
Ionic Strength ◽  
Metal Ions ◽  
Water Mixture ◽  
Lanthanide Metal

scholarly journals Stability Constants of Lanthanide Metal Ions Chelates with Substituted Pyrazoles in Different Solvents

2011 ◽  
Vol 8 (1) ◽  
pp. 131-136 ◽  
Author(s):  
G. H. Murhekar ◽  
A. R. Raut ◽  
R. S. Sonone
Keyword(s):  
Ionic Strength ◽  
Metal Ions ◽  
Stability Constants ◽  
Water Mixture ◽  
Solvent Medium ◽  
Acetone Water ◽  
Lanthanide Metal ◽  
Substituted Pyrazoles ◽  
Metal Ligand

The reaction of Pr (III) and Nd (III) metal ions with some substituted pyrazoles, at 0.1M ionic strength and at 30 ± 0.10C in 70% acetone-water mixture and 70% propanol-water mixture have been studied pH-metrically. The data obtained were used to estimate the values of proton-ligand (pK) and metal-ligand (logK) stability constants in different solvents. It is observed that the pK and logK values in 70% propanol-water mixture are grater than in 70% acetone -water mixture. Pr (III) and Nd (III) metal ions formed 1:1 and 1:2 complexes with all the ligands in both solvent medium.

scholarly journals Formation constants of lanthanide metal ion chelates with some substituted sulfonic acids

2010 ◽  
Vol 7 (1) ◽  
pp. 235-238
Author(s):  
R. S. Sonone ◽  
G. H. Murhekar
Keyword(s):  
Ionic Strength ◽  
Sulfonic Acid ◽  
Metal Ion ◽  
Formation Constants ◽  
Trifluoromethanesulfonic Acid ◽  
Water Mixture ◽  
Benzenesulfonic Acid ◽  
Sulfonic Acids ◽  
Lanthanide Metal ◽  
The Stability

The pKa and logK values of some substituted sulfonic acid in 70% (v/v) dioxane-water mixture have been determined using pH metric measurements. The stability constant of complexes of Gd (III), Tb (III) and Ho (III) with p-aminobenzenesulfonic (L1) and p-sulfophthalic acid (L2), 2-amino-5-chloro benzenesulfonic acid (L3) and trifluoromethanesulfonic acid (L4) have been determined at 0.1M ionic strength at 28±0.1 0C pH metrically. It is observed that both the metal ions formed 1:1 & 1:2 complexes with all the ligands.

Extended Rodlike Polyaromatic Receptors with Bent Tridentate Units Complexed to Lanthanide Metal Ions

2000 ◽  
Vol 39 (23) ◽  
pp. 5286-5298 ◽  
Author(s):  
Homayoun Nozary ◽  
Claude Piguet ◽  
Jean-Pierre Rivera ◽  
Paul Tissot ◽  
Gérald Bernardinelli ◽  
...  
Keyword(s):  
Metal Ions ◽  
Lanthanide Metal

Microporous lanthanide metal-organic frameworks

2012 ◽  
Vol 32 (2-4) ◽  
pp. 81-100 ◽  
Author(s):  
Yao Chen ◽  
Shengqian Ma
Keyword(s):  
Optical Properties ◽  
Metal Ions ◽  
Porous Materials ◽  
Chemical Sensing ◽  
Metal Organic Frameworks ◽  
Current Status ◽  
Multifunctional Materials ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Solvent Adsorption

AbstractMicroporous metal-organic frameworks (MOFs) based on lanthanide metal ions or clusters represent a group of porous materials, featuring interesting coordination, electronic, and optical properties. These attractive properties in combination with the porosity make microporous lanthanide MOFs (Ln-MOFs) hold the promise for various applications. This review is to provide an overview of the current status of the research in microporous Ln-MOFs, and highlight their potential as types of multifunctional materials for applications in gas/solvent adsorption and separation, luminescence and chemical sensing and catalysis.

A flexible zwitterion ligand based lanthanide metal–organic framework for luminescence sensing of metal ions and small molecules

2015 ◽  
Vol 44 (24) ◽  
pp. 10914-10917 ◽  
Author(s):  
Rong-Mei Wen ◽  
Song-De Han ◽  
Guo-Jian Ren ◽  
Ze Chang ◽  
Yun-Wu Li ◽  
...  
Keyword(s):  
Metal Ions ◽  
Small Molecules ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Organic Framework

A new 3D luminescence LnMOF was synthesized using a tripodal flexible zwitterion ligand which takes a chair-shaped configuration. The compound displays highly selective luminescence sensing of the Fe3+ ion and nitrobenzene.

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