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Aqueous shift reagents for high-resolution cationic nuclear magnetic resonance. III. Dy(TTHA)3−, Tm(TTHA)3−, and Tm(PPP)27−

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dc.contributor.author Chu, Simon en_US
dc.contributor.author Pike, Martin en_US
dc.contributor.author Fossel, Eric en_US
dc.contributor.author Smith, Thomas en_US
dc.contributor.author Balschi, James en_US
dc.contributor.author Springer, Charles Jr. en_US
dc.date.accessioned 2006-08-18T20:52:02Z en_US
dc.date.available 2006-08-18T20:52:02Z en_US
dc.date.issued 1984-01 en_US
dc.identifier.citation Journal Magnetic Resonance V56N1 (1984) 33-47 en_US
dc.identifier.issn 1090-7807 en_US
dc.identifier.uri http://hdl.handle.net/1850/2335 en_US
dc.description.abstract The isotropic hyperfine shifts induced in the 23Na+ resonance by the shift reagents Dy(DPA)33−, Dy(NTA)23−, Dy(PPP)27−, Tm(PPP)27−, Dy(TTHA)3−, and Tm(TTHA)3− are compared under similar conditions. The last three are introduced as shift reagents in this study. The Dy(PPP)37− and Tm(PPP)27− ions cause the largest shifts. However, these shifts are very pH dependent and are readily decreased by the presence of Ca2+ or Mg2+ ions. The Dy(TTHA)3− and Tm(TTHA)3− ions produce quite large shifts which are independent of pH (between 5.5 and 12) and less sensitive to Ca2+ and Mg2+. For a given chelate ligand, the analogous Dy(III) and Tm(III) complexes cause hyperfine shifts in opposite directions. However, while the Dy(PPP)27− ion induces an upfield shift, the Dy(TTHA)3− ion induces a downfield shift. Some data on shifts of the 25Mg2+, 39K+, and 87Rb+ resonances are also presented. In addition the 14N peak of NH4+ can be quite effectively shifted. DPA2−, dipicolinate pyridine-2 6-dicarboxylate; CA3−, chelidamate 4-oxypyridine-2,6-dicarboxylate; PPP5−, tripolyphosphate P3O105−; NTA3−, nitrilotriacetate N(CH2CO2)33−; EDTA4−, ethylenediaminetetraacetate (O2CCH2)2N(CH2)2N(CH2CO2)24−; TTHA6−, triethylenetetraminehexaacetate (O2CCH2)2N(CH2)2N(CH2CO2)(CH2)2N(CH2CO2)(CH2)2N(CH2CO2)26−; HTEA+, triethanolammonium (HOCH2CH2)3NH+; Ln, any of the elements from La to Lu; Δν1/2, width at half height; SR, shift reagent(s); RR, relaxation reagents(s); I, Ionic strength en_US
dc.format.extent 37365 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher Elsevier: Journal of Magnetic Resonance en_US
dc.subject Hyperfine shifts en_US
dc.subject Ionic strength en_US
dc.subject Shift reagents en_US
dc.title Aqueous shift reagents for high-resolution cationic nuclear magnetic resonance. III. Dy(TTHA)3−, Tm(TTHA)3−, and Tm(PPP)27− en_US
dc.type Article en_US
dc.identifier.url http://dx.doi.org/10.1016/0022-2364(84)90189-6

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