1971
DOI: 10.1139/v71-037
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Application of Paramagnetic Shift Reagents in Nuclear Magnetic Resonance Studies of Complex Alcohols and Amines

Abstract: The effects of Co(acetyla~etonate)~, Ni(acetylacet~nate)~, and Cu(ethy1 acetoa~etate)~ on the nuclear magnetic resonance spectra of a variety of alcohols and amines have been studied. Changes are produced in the spectra, which are useful for assigning the signals.

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Cited by 20 publications
(3 citation statements)
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“…Again, paramagnetic chelates have already been used in the early days of NMR spectroscopy as so-called paramagnetic shift reagents to simplify complex NMR spectra by changing the chemical shifts of signals of protons binding or exchanging with the respective agents. 33 The term chemical-exchange saturation transfer (CEST) for the generation of contrast in MR images by utilizing diamagnetic (DIACEST, DIAmagnetic Chemical Exchange Saturation Transfer) and paramagnetic (PARACEST, PARAmagnetic Chemical Exchange Saturation Transfer) agents was introduced by Ward et al 34 The CEST efficiency depends on the rate of the chemical exchange and the chemical shift difference between the different proton populations.…”
Section: Contrast Based On Differences In Relaxation Ratesmentioning
confidence: 99%
“…Again, paramagnetic chelates have already been used in the early days of NMR spectroscopy as so-called paramagnetic shift reagents to simplify complex NMR spectra by changing the chemical shifts of signals of protons binding or exchanging with the respective agents. 33 The term chemical-exchange saturation transfer (CEST) for the generation of contrast in MR images by utilizing diamagnetic (DIACEST, DIAmagnetic Chemical Exchange Saturation Transfer) and paramagnetic (PARACEST, PARAmagnetic Chemical Exchange Saturation Transfer) agents was introduced by Ward et al 34 The CEST efficiency depends on the rate of the chemical exchange and the chemical shift difference between the different proton populations.…”
Section: Contrast Based On Differences In Relaxation Ratesmentioning
confidence: 99%
“…Certain lanthanide complexes have been found to induce large shifts without excessive line-broadening, and use of such lanthanide shift reagents has been well documented in the literature (6) including THIS JOURNAL (7,8). Transition metal complexes such as Co(AcAc)2(H20)2 have been used also to simplify NMR spectra of alcohols and amines (9). Although somewhat less effective than the lanthanides, transition metal acetylacetonate complexes have for pedagogical purposes advantages of low cost, ease of preparation, and (unlike the lanthanide reagents) nonhygroscopic properties.…”
Section: Nmr Shift Reagent Workmentioning
confidence: 99%
“…Acetylacetone (Hacac) is well known as one of useful bidentate ligands, which can form chelate complexes, such as [M II (acac) 2 ], [M III (acac) 3 ] and [M III (acac) 2 X 2 ] − , through reactions with various transition metal ions [1-28]. The complexes have been widely investigated, for example, as building blocks for magnetic materials [29][30][31], NMR shift reagents and paramagnetic relaxation reagents [32][33][34][35] and catalysts [36,37]. The trans-[Ru III (acac) 2 (CN) 2 ] − anion has an unpaired electron and has been reported to work as a paramagnetic linker in combination with Mn 2+ and [Fe III salen] + to produce ferri-or ferromagnetic compounds {Mn II [Ru III (acac) 2 (CN) 2 ] 2 } n and [{Fe III (salen)}{Ru III (acac) 2 (CN) 2 }] − with two-and one-dimensional structures, respectively [38,39].…”
Section: Introductionmentioning
confidence: 99%