What has a structure resembling diferulic acid and is bright yellow?
Curcumin Curcumin is a bright yellow chemical produced by some plants. It is the principal curcuminoid of turmeric ("Curcuma longa"), a member of the ginger family (Zingiberaceae). It is sold as an herbal supplement, cosmetics ingredient, food flavoring, and food coloring. As a food additive, its E number is E100.
Carborane acid Carborane acids H(CHBX) are a class of superacids at least one million times stronger than 100% sulfuric acid in terms of their Hammett acidity function ("H") values, which measure the ability of a medium or solvent to donate protons. The most well known example is chlorine based (X = Cl) [Figure 1]. The reason for their high acidities is that their conjugate bases, anions of the form (CHB11X11− ), are highly delocalized and stable species substituted with electronegative groups (the (pseudo)halogen X). They are the only acids known to protonate C fullerene without decomposing it. Additionally, they form stable, isolable salts with protonated benzene, C6H7+ .