Noncovalent interactions between acenaphthenone and dissolved fulvic acid as determined by (super 13)C NMR T(sub 1) relaxation measurements

Article Abstract:

An experiment utilizing (super 13)C NMR T(sub 1) relaxation measurements allowed a thorough examination of non-covalent interactions between (super 13)C-labeled acenaphthenone and Suwannee River fulvic acid in a methanol/D2O solvent. Fulvic acid's presence in a methanol/D20 solvent induced three non-covalent interactions namely: a weak sorption interaction between acenaphthenone and fulvic acid, an enhanced solubilization of acenaphthenone and fulvic acid, and an interaction between just the solvent and acenaphthenone.

Basic Chemical Manufacturing, Industrial Organic Chemicals, Organic Chemicals, Pollution Control R&D, Organic compounds, Pollution control research, Organic compound synthesis, Suwannee River

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Comment on 'Noncovalent Interactions between Acenaphthenone and Dissolved Fulvic Acid as Determined by 13C NMR T1 Relaxation Measurements'

Article Abstract:

Comments on the use of a molecular probe to determine the noncovalent interactions of acenapthenone with fulvic acid center on the conclusions derived by the researchers from the experiment. These include the failure of the research to address the quadrapolar relaxation rate of acenapthenone in deuterated methanol, which is different from its relaxation rate in non-deuterated methanol, as was the failure to observe the chemical shift of the carbonoyl-C in non-deuterated methanol.

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Response to comment on 'Noncovalent interactions between acenapthenone and dissolved fulvic acid as determined by 13C NMR T1 relaxation measurements'

Article Abstract:

The observed decrease in acenaphthenone T1 relaxation time as dissolved from pure deuterated methanol to a non-deuterated methanol is expected since the potential of the deuterated methanol to form hydrogen bonds is greater than non-deuterated methanol. The lack of the carbonoyl-C shift is explained by the medium effects, where the methanol medium interferes with the noncovalent binding interactions that can be expected of the compounds under low concentrations of fulvic acid.

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