Photochromic indeno-fused naphthopyrans having extended...

C - Chemistry – Metallurgy – 09 – K

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C09K 9/02 (2006.01) C07D 311/78 (2006.01) C07D 401/04 (2006.01) G02B 5/10 (2006.01) G02B 5/23 (2006.01) G02C 7/02 (2006.01) G02F 1/13 (2006.01)

Patent

CA 2603706

Various non-limiting embodiments disclosed herein relate to photochromic materials having extended pi-conjugated systems. For example, various non- limiting embodiments disclosed herein provide a photochromic material, such as an indeno-fused naphthopyran, which comprises a group that extends the pi- conjugated system of the indeno-fused naphthopyran bonded at the 11-position thereof. Further, the photochromic materials according to certain non-limiting embodiments disclosed herein may display hyperchromic absorption of electromagnetic radiation as compared to conventional photochromic materials and/or may have a closed-form absorption spectrum that is bathochromically shifted as compared to conventional photochromic materials. Other non-limiting embodiments relate to photochromic compositions and photochromic articles, such as optical elements, made using the disclosed photochromic materials, and methods of making the same.

Dans divers modes de réalisation non exhaustifs, l'invention concerne des matériaux photochromiques présentant des systèmes .pi.-conjugués étendus. Par exemple, dans divers modes de réalisation non exhaustifs, l'invention concerne un matériau photochromique, tel qu'un naphtopyrane indénofusionné, lequel comprend un groupe qui étend le système .pi.-conjugué du naphtopyrane indénofusionné lié à la position 11 de ce dernier. En outre, les matériaux photochromiques selon certains modes de réalisation non exhaustifs de l'invention peuvent présenter une absorption hyperchrome de rayonnement électromagnétique comparée à des matériaux photochromiques classiques et/ou peuvent présenter un spectre d'absorption de forme fermée qui est décalé bathochromiquement comparé à des matériaux photochromiques classiques. Dans d'autres modes de réalisation non exhaustifs, l'invention concerne des compositions photochromiques et des articles photochromiques, tels que des éléments optiques, produits à l'aide des matériaux photochromiques de l'invention, ainsi que leurs procédés de production.

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