Publications by authors named "Joseph P Roddy"
This article describes a method for improving H NMR spectra of aqueous samples containing paramagnetic metals by precipitation of metal cations with a variety of counteranions. The addition of hydroxide, phosphate, carbonate, and arsenate to solutions of transition metals such as Fe and Mn can reduce line broadening and improve the ability of a spectrometer to lock on the signal of deuterium. The method is most effective under strongly alkaline conditions, and care must be taken to observe whether the organic substrates undergo side reactions or are themselves removed from solution upon addition of the precipitating salts.
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- The study demonstrates that the PFe catalyst significantly enhances the efficiency of converting N to NH, achieving up to 72% delivery with a simpler combination of reductants and acids.
- This improvement allows for a high turnover number of 84 equivalents of NH formed per iron site, showing better performance compared to previous catalysts.
- The research also investigates changes in the reaction's mechanics through spectroscopy, identifying a role for protonated metallocenes as effective reagents in the catalytic process.