Synthesis of Photochromic Lactone‐Fused Naphthopyrans With Extended Visible Light Absorption
Year: 2024
Type: article
Abstract: ABSTRACT The synthesis of new photochromic lactone‐fused naphthopyrans substituted with arylethenyl groups is discussed. Brief exposure of solutions of these colorless compounds to the UV light results in the generation of intense hues, which spontaneously return to the uncolored state within seconds after removing the light source. As anticipated, introducing the ethenyl bonds caused a bathochromic shift in the absorption spectrum of the opened colored photoisomers, however, due to non‐uniform absorption across the visible spectrum, the perceived color ranged from red to brownish‐red.
DOI: 10.1002/jhet.4940
Authors: Nuno Ferreira, Céu M. Sousa, Paulo J. Coelho
Institution: University of Trás-os-Montes and Alto Douro
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4405222070