Synthesis of Photochromic Heterocyclic-Fused Naphthopyrans. Tuning the Color and Fading Speed
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- Vânia Graça
- Centro de Química - Vila Real, Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real , Portugal
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- Céu M Sousa
- Centro de Química - Vila Real, Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real , Portugal
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- Paulo J Coelho
- Centro de Química - Vila Real, Universidade de Trás-os-Montes e Alto Douro, 5000-801 Vila Real , Portugal
抄録
<jats:title>Abstract</jats:title> <jats:p>New photochromic 3-thienyl-3H-naphtho[1,2-b]pyrans fused to lactone and indole rings were efficiently prepared using a one-pot acid-catalyzed reaction, at room temperature, as the key step. These colorless photoswitches acquire intense red/brown shades under UV light and return spontaneously to the colorless state in the dark. The combination of the 3 heterocyclic rings assures a broad and intense absorption in the visible region and it allows a full switch between the two states in less than 1 min, at room temperature.</jats:p>
収録刊行物
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- Bulletin of the Chemical Society of Japan
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Bulletin of the Chemical Society of Japan 96 (7), 614-623, 2023-05-27
Oxford University Press (OUP)