scholarly journals Nuclear magnetic resonance study of the transverse relaxation of 17O in aqueous solutions of titanous ion

1971 ◽  
Author(s):  
Herbert L. Charles, Jr.
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Aqueous Solutions ◽  
Nuclear Magnetic Resonance Study ◽  
Magnetic Resonance Study ◽  
Transverse Relaxation ◽  
Nuclear Magnetic

Zn(II)–D-(−)penicillamine complexes in aqueous solution. Zn-67 nuclear magnetic resonance study

1986 ◽  
Vol 64 (9) ◽  
pp. 1845-1849 ◽  
Author(s):  
Alfred Delville ◽  
Christian Detellier
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Study ◽  
Transverse Relaxation Rate ◽  
Amino Groups ◽  
Magnetic Resonance Study ◽  
Transverse Relaxation ◽  
Fast Exchange ◽  
Zinc Chelation ◽  
Nuclear Magnetic

D–(−)-Penicillamine interactions with Zn(II) have been studied in aqueous solutions as a function of pH, penicillamine concentration, and temperature, using Zn-67 nuclear magnetic resonance. Longitudinal and transverse relaxation rate measurements show the presence in solution of complexes in fast exchange with the aquated Zn(II) cation, and belonging to the extreme narrowing regime. Using equilibrium constant values from the literature, the relaxation behaviour was modelled. Characteristic Zn-67 line width values for the two complexes Zn(Pen) (v = (6200 ± 500) Hz) and [Zn(Pen H)]+ (v = (6000 ± 1000) Hz) were found. Equality of the two values is in agreement with zinc chelation by the sulfhydryl and the amino groups.

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