Detailed Mechanism of Phosphoanhydride Bond Hydrolysis Promoted by a Binuclear ZrIV-Substituted Keggin Polyoxometalate Elucidated by a Combination of 31P, 31P DOSY, and 31P EXSY NMR Spectroscopy
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چکیده
منابع مشابه
Quantitative analysis of phospholipids by 31P-NMR.
High-field 31P nuclear magnetic resonance spectroscopy was used to quantitate phospholipids in mixtures in organic solvents. The sample is dissolved in chloroform-methanol and analyzed at 161.7 MHz with decoupling of the protons. Signals were identified using authentic compounds, and their relative distribution was measured in mole percent. The method has good accuracy and reproducibility, and ...
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The reactivity and solution behaviour of the binuclear Zr(IV)-substituted Keggin polyoxometalate (Et2NH2)8[{α-PW11O39Zr(μ-OH)(H2O)}2]·7H2O (ZrK 2 : 2) towards phosphoester bond hydrolysis of the RNA model substrate 2-hydroxypropyl-4-nitrophenyl phosphate (HPNP) was investigated at different reaction conditions (pD, temperature, concentration, and ionic strength). The hydrolysis of the phosphoes...
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Addition of choline, ethanolamine, or hemicholinium-3 (a choline kinase inhibitor) to the perfusate of human breast cancer cells monitored by 31P NMR spectroscopy resulted in significant changes to phosphomonoester (PME) and phosphodiester (PDE) signals. These results enable us to assign the PMEs to phosphcholine (PC) and phosphoethanolamine (PE), the PDEs to glycerophosphorylcholine and glycer...
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Received February 7, 1996 Revised Manuscript Received August 12, 1996 Recently, 31P NMR has been introduced as a powerful tool for the elucidation of the different types of phenolic, alcoholic, and carboxylic structures that are present in lignins.1,2 It was shown that the reaction of 1,3,2dioxaphospholanyl chloride2,3 or 2-chloro-4,4,5,5-tetramethyldioxaphospholane4,5 (I) with the above labile...
متن کاملInterleaved Multivoxel 31P MR Spectroscopy
PURPOSE Separate measurements are required when investigating multiple exercising muscles with singlevoxel-localized dynamic 31 P-MRS. With multivoxel spectroscopy, 31 P-MRS time-series spectra are acquired from multiple independent regions during one exercise-recovery experiment with the same time resolution as for singlevoxel measurements. METHODS Multiple independently selected volumes wer...
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ژورنال
عنوان ژورنال: Inorganic Chemistry
سال: 2016
ISSN: 0020-1669,1520-510X
DOI: 10.1021/acs.inorgchem.6b00385