Hello, I'd like to know if proanthocyanidins present fluorescence by their own. If not, which dye could I use to see them by fluorescence microscopy? I use them in the formulation of food emulsions and I want to determine their presence at the oil-water interface. Thank you.
It seems that at least some proanthocyanidins are fluorescent:
Article Antioxidant and Fluorescence Properties of Hydrogenolyzised ...
Article Screening of Foods Containing Proanthocyanidins and Their St...
There are two manuscripts:
Synthesis of Fluorescent Proanthocyanidin-Cinnamaldehydes Pyrylium Products for Microscopic Detection of Interactions with Extra-Intestinal Pathogenic Escherichia coli. Journal of Agricultural and Food Chemistry.
Fluorescent labeling of cranberry proanthocyanidins with 5-([4,6-dichlorotriazin-2-yl]amino)fluorescein (DTAF). Food Chemistry.
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