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2‐Acetylindan‐1,3‐dione and its Cu2+ and Zn2+ complexes as promising sunscreen agents

In continuation of a previous spectroscopic and quantum chemical study on 2‐acetylindan‐1,3‐dione (2AID), the spectral properties and photostability of 2AID and its Cu2+ and Zn2+ complexes in different solvents are reported. Comparison is made with the photostability of two commercially available sunscreens: benzophenone‐3 and octylmethoxycinnamate. 2AID exhibits a higher photostability, high molar absorption coefficient (42 000 m−1 cm−1) at λmax and broad‐spectrum UV‐protection properties.