Natural Quinone Dyes: A Review on Structure, Extraction Techniques, Analysis and Application Potential

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Abstract

Synthetic dyes are by far the most widely applied colourants in industry. However, environmental and sustainability considerations have led to an increasing efforts to substitute them with safer and more sustainable equivalents. One promising class of alternatives is the natural quinones; these are class of cyclic organic compounds characterized by a saturated (C6) ring that contains two oxygen atoms that are bonded to carbonyls and have sufficient conjugation to show color. Therefore, this study looks at the potential of isolating and applying quinone dye molecules from a sustainable source as a possible replacement for synthetic dyes. It presents an in-depth description of the three main classes of quinoid compounds in terms of their structure, occurrence biogenesis and toxicology. Extraction and purification strategies, as well as analytical methods, are then discussed. Finally, current dyeing applications are summarised. The literature review shows that natural quinone dye compounds are ubiquitous, albeit in moderate quantities, but all have a possibility of enhanced production. They also display better dyeability, stability, brightness and fastness compared to other alternative natural dyes, such as anthocyanins and carotenoids. Furthermore, they are safer for the environment than are many synthetic counterparts. Their extraction, purification and analysis are simple and fast, making them potential substitutes for their synthetic equivalents. Graphic Abstract: [Figure not available: see fulltext.]

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Dulo, B., Phan, K., Githaiga, J., Raes, K., & De Meester, S. (2021, December 1). Natural Quinone Dyes: A Review on Structure, Extraction Techniques, Analysis and Application Potential. Waste and Biomass Valorization. Springer Science and Business Media B.V. https://doi.org/10.1007/s12649-021-01443-9

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