Phosphorus-Containing Macrocyclic Ionophores in Metal Ion Separations

2000 ◽  
Vol 39 (10) ◽  
pp. 3550-3565 ◽  
Author(s):  
Galina G. Talanova
Keyword(s):  
Metal Ion ◽  
Metal Ion Separations ◽  
Phosphorus Containing

Fluorinated Alkoxides. Part VIII. Mixed Ligand Complexes of Perfluoropinacol with Ni2+, Pd2+, Pt2+ and Cu2+. Solvation Equilibria between 4- and 5-coordinate Ni2+

1975 ◽  
Vol 53 (6) ◽  
pp. 809-816 ◽  
Author(s):  
W. Stafford Cripps ◽  
Christopher J. Willis
Keyword(s):  
Metal Ion ◽  
Nickel Complexes ◽  
Mixed Ligand ◽  
Ligand Field ◽  
Electronic Effects ◽  
Unusual Behavior ◽  
Planar Structures ◽  
Square Planar ◽  
Phosphorus Containing ◽  
Fluorinated Alkoxides

Perfluoropinacol, (CF3)2C(OH)C(OH)(CF3)2, ionizes by loss of two protons, and the resulting dinegative ion (PFP2−) chelates to Ni2+, Pd2+, Pt2+, and Cu2+. A variety of stable neutral complexes may be isolated if the tetracoordination of the metal ion is completed with two monodentate or one bidentate nitrogen- or phosphorus-containing ligands; square-planar structures are invariably found. The structures of these complexes are contrasted with those of analogous halides, and it is concluded that electronic effects are predominant in determining them, although steric influences may sometimes be important. The ligand field strength of the perfluoropinacolato ion is approximately equal to that of the thiocyanate ion.The nickel complexes Ni(PFP)22− and (PFP)Ni(RNHCH2CH2NHR) react with donor solvents (water, methanol, pyridine, etc.) to give equilibria between four- and five-coordinate solvated species; six-coordinate species are not observed. This unusual behavior is attributed to the steric hindrance imposed by the bulk of the PFP2− ligand.

Calix[4]arenes with a Novel Proton-Ionizable Group: Synthesis and Metal Ion Separations

2000 ◽  
pp. 112-124 ◽  
Author(s):  
Richard A. Bartsch ◽  
Hong-Sik Hwang ◽  
Vladimir S. Talanov ◽  
Chunkyung Park ◽  
Galina G. Talanova
Keyword(s):  
Metal Ion ◽  
Metal Ion Separations

Metal Ion Separations by Supported Liquid Membranes

1999 ◽  
Vol 38 (6) ◽  
pp. 2182-2202 ◽  
Author(s):  
Josefina de Gyves ◽  
Eduardo Rodríguez de San Miguel
Keyword(s):  
Metal Ion ◽  
Liquid Membranes ◽  
Supported Liquid Membranes ◽  
Metal Ion Separations

POLYMERIC MATERIALS FOR METAL ION SEPARATIONS

1989 ◽  
Vol 7 (5) ◽  
pp. 925-935 ◽  
Author(s):  
R.T. Paine ◽  
S.M. Blaha ◽  
A.A. Russell ◽  
G.S. Conary
Keyword(s):  
Metal Ion ◽  
Polymeric Materials ◽  
Metal Ion Separations
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