scholarly journals Corrigendum: 2 H and 139 La NMR Spectroscopy in Aqueous Solutions at Geochemical Pressures

2016 ◽  
Vol 55 (23) ◽  
pp. 6578-6578
Author(s):  
Gerardo Ochoa ◽  
Corey D. Pilgrim ◽  
Michele N. Martin ◽  
Christopher A. Colla ◽  
Peter Klavins ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Aqueous Solutions

Inside Back Cover:2H and139La NMR Spectroscopy in Aqueous Solutions at Geochemical Pressures (Angew. Chem. Int. Ed. 51/2015)

2015 ◽  
Vol 54 (51) ◽  
pp. 15585-15585
Author(s):  
Gerardo Ochoa ◽  
Corey D. Pilgrim ◽  
Michele N. Martin ◽  
Christopher A. Colla ◽  
Peter Klavins ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Aqueous Solutions ◽  
Back Cover

Comparison of cis and trans-Platinum Mononucleobase Compounds with DNA and Protein Models

2008 ◽  
Vol 61 (9) ◽  
pp. 694 ◽  
Author(s):  
Joseph V. Strukl ◽  
Queite A. de Paula ◽  
Xiaohong Yang ◽  
Yun Qu ◽  
Nicholas P. Farrell
Keyword(s):  
Nmr Spectroscopy ◽  
Antiviral Activity ◽  
Aqueous Solutions ◽  
Guanosine Monophosphate ◽  
Molar Ratio ◽  
Trans Isomers ◽  
Specific Proteins ◽  
Low Cytotoxicity ◽  
Cis And Trans ◽  
Protein Models

Reactions of 5′-guanosine monophosphate (5′-GMP) and N-acetylmethionine (N-ac-l-Met) with the mononucleobase compounds, cis-[PtCl(L)n(9-EtGH)]+ (L = NH3, 4-pic, n = 2; L = en, n = 1) in a 1:1 molar ratio have been studied in aqueous solutions at pH 7.3 using 1H and 195Pt NMR spectroscopy. There is a high kinetic preference for sulfur over nitrogen binding. These results are compared with the trans isomers. Based on low cytotoxicity and a high sulfur/nitrogen preference the cis isomers may also present suitable features for antiviral activity through interaction with specific proteins.

scholarly journals Zero- to Ultralow-Field NMR Spectroscopy of Small Biomolecules

2020 ◽  
Author(s):  
Piotr Put ◽  
Szymon Pustelny ◽  
Dmitry Budker ◽  
Emmanuel Druga ◽  
Tobias Sjolander ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Aqueous Solutions ◽  
Transverse Magnetic ◽  
Zero Field ◽  
Analytical Technique ◽  
Indirect Assessment ◽  
Non Invasive ◽  
Analytical Potential ◽  
Relaxation Studies ◽  
Small Biomolecules

<p>Nuclear magnetic resonance (NMR) spectroscopy is a well-established analytical technique used to study chemicals and their transformations. However, high-eld NMR spectroscopy necessitates advanced infrastructure and even cryogen-free benchtop NMR spectrometers cannot be readily assembled from commercially available components. We demonstrate construction of a portable zero-field NMR spectrometer employing a commercially available magnetometer and investigate its applications in analytical chemistry. In particular, <i>J</i>-spectra of small representative biomolecules [<sup>13</sup>C]-formic acid, [1-<sup>13</sup>C]-glycine, [2,3-<sup>13</sup>C]-fumarate, and [1-<sup>13</sup>C]-D-glucose were acquired and an approach relying on the presence of a transverse magnetic eld during the detection was investigated for relaxometry purposes. We found that water relaxation time strongly depends on the concentration of dissolved D-glucose in the range of 1-10 mM suggesting opportunities for indirect assessment of glucose concentration in aqueous solutions. Extending analytical capabilities of zero-field NMR to aqueous solutions of simple biomolecules (aminoacids, sugars and metabolites) and relaxation studies of aqueous solutions of glucose highlight the analytical potential of non-invasive and portable ZULF NMR sensors for applications outside of research laboratories.</p>

scholarly journals A study of 12-tungstosilicic and 12-molybdophosphoric acids in solution

2008 ◽  
Vol 73 (2) ◽  
pp. 197-209 ◽  
Author(s):  
Danica Bajuk-Bogdanovic ◽  
Ivanka Holclajtner-Antunovic ◽  
Marija Todorovic ◽  
Ubavka Mioc ◽  
Joanna Zakrzewska
Keyword(s):  
Nmr Spectroscopy ◽  
Aqueous Solutions ◽  
Special Importance ◽  
Molybdophosphoric Acid ◽  
Physiological Conditions ◽  
Tungstosilicic Acid ◽  
Ir And Nmr Spectroscopy ◽  
Wide Range ◽  
Catalytic Applications ◽  
Anion Type

The behaviour of two heteropolyacids (HPAs) with quite different stability in aqueous solutions was systematically investigated by UV, IR and NMR spectroscopy and potentiometric titration. It was shown that the Keggin structure of 12-tungstosilicic acid (H4SiW12O40, WSiA) anion was sustained over a wide range of pH from 1.0 to 7.0, while the same anion type of 12-molybdophosphoric acid (H3PMo12O40, MoPA) was present only at pH 1.0. This means that under physiological conditions WSiA is dominantly present in the form of a Kegginanion, whereas the structure of MoPA is completely decomposed to molybdate and phosphate. The obtained results are of special importance for bio-medical and catalytic applications of these compounds and for a better understanding of the mechanism of their action.

Innenrücktitelbild:2H and139La NMR Spectroscopy in Aqueous Solutions at Geochemical Pressures (Angew. Chem. 51/2015)

2015 ◽  
Vol 127 (51) ◽  
pp. 15805-15805
Author(s):  
Gerardo Ochoa ◽  
Corey D. Pilgrim ◽  
Michele N. Martin ◽  
Christopher A. Colla ◽  
Peter Klavins ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Aqueous Solutions
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