Figure 3. Spectra used for comparing UV absorption of aspartame and ibuprofen, showing the low absorbance of UV-radiation in a molecule with an isolated aromatic ring. b) Spectra used for comparing UV absorption of aspartame with salicylic acid, showing the high absorbance of UV-radiation in a molecule with an activating substituent, OH, on the aromatic ring.

From

A Complete Structure Investigation of an Organic Molecule for Chemistry Students; An Analysis of Aspartame

Marit Kristin Leiren, Kari Grete Nordli Børve, Rhiannon Tveiten Lewis, Signe Steinkopf

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