In the leaves, hulls, and roots of the black walnut tree, Juglans nigra, exists juglone (or 5-hydroxy-1,4-napthoquinone). Juglone, with molecular formula C10H6O3 and molar mass 174.15g/mol, has many applications in science. These include anti-microbial and anti-fungal application against pathogens, herbicidal function against foreign plant species, and use as natural dyes. While juglone is very versatile, it is rather challenging to detect. Spectroscopy alone tends to be insufficient in solely determining presence and concentration of juglone in a sample. This is due to the presence of several phenolic and polyphenolic compounds in a given walnut extract. Understanding how to better detect the presence of juglone in a standard stock solution or in a naturally acquired sample furthers the development of juglone extraction and related application in a scientific setting. The objective of this research was to continue studying the electrochemistry of juglone in 1:1 aqueous buffer:ethanol mixed solutions using cyclic voltammetry to assess electroactivity of standard prepared juglone solutions. Specifically, a focus on pH values that mimic soil pH in the native region of the black walnut tree was employed in an attempt to understand how juglone acts in an environmental setting.

Electroactivity of juglone in buffered ethanol mixtures of soil-like pH

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.