Through-Space Control of the Persistence of Photogenerated o-Quinonoid Intermediates in Naphthalenes Containing Cofacially Oriented Chromenes and Arenes

• DOI: 10.1021/ol300449p
• Publication Date: 2012-04-27T17:54:17Z
• Authors: Jarugu Narasimha ...; Susovan Mandal; Keshaba Nanda Parida
• Keywords: Persistence (discontinuity)

Remarkable modulation of the persistence photogenerated colored o-quinonoid intermediates via a through-space interaction has been demonstrated in chromenes 1–4 based on 1,8-diarylnaphthalenes. Polar/π is shown to stabilize closed form 4 such an extent that photoinduced coloration virtually invisible, while same stabilization opened 2 permits ready with long-lived intermediate.