Described are novel reversible photochromic naphthopyran compounds substituted at the number eight carbon atom on the naphtho portion of the naphthopyran ring with, for example, a methoxy group. Also described are polymeric organic host materials that contain or that are coated with such compounds. Optically clear articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., certain spiro(indoline)type compounds, are also described.
A photochromic compound having a high color-developing sensitivity, a large fading rate and good durability of photochromic property. A novel chromene compound is, for example, represented by the following formula,
and in which, as a basic structure, a condensed ring having a particular divalent group bonded to carbon atoms at the fourth and fifth positions of a fluoreno group is spiro-bonded to the first position of an indene ring, a particular divalent group is bonded to carbon atoms at the fifth and sixth positions of a chromene ring to form a condensed ring, and particular substituents are bonded to a carbon atom at the second position of the chromene ring.
Naphthopyrans annelated in C5-C6, their preparation and compositions and (CO)polymer matrices containing them
申请人:——
公开号:US20020197562A1
公开(公告)日:2002-12-26
The present invention relates to novel compounds of the naphthopyran type which have an annelated carbocycle in position 5,6. These compounds are of formula (I) given below:
1
in which A is an alicyclic ring which is optionally annelated with an aromatic ring and in which two adjacent R
3
can together form at least one ring, for example a benzo group. These compounds (I) possess interesting photochromic properties. The invention also relates to the method of preparing these compounds (I), as well as their applications as photochromes and compositions and (co)polymer matrices comprising them.
Photocontrol of Ca<sup>2+</sup>complexation with an azacrown-containing benzochromene
作者:E. N. Ushakov、V. B. Nazarov、O. A. Fedorova、S. P. Gromov、A. V. Chebun'kova、M. V. Alfimov、F. Barigelletti
DOI:10.1002/poc.619
日期:2003.5
The new azacrown-containingbenzochromene 1a was synthesized in order to study the effect of its reversible photochromic reaction on complex formation with Ca2+ in acetonitrile. It was found that both the initial chromene 1a and its photoinduced merocyanine isomer 2a are able to form 1:1 complexes with Ca2+, in which the metal cation coordinates to the crown ether moiety. The complexation causes strong
[EN] BENZO-, NAPHTHO- AND PHENANTHROCHROMENES SUBSTITUTED WITH AN ARYLAMINE GROUP WITH PHOTOCHROMATIC PROPERTIES<br/>[FR] BENZO, NAPHTO ET PHENANTHROCHROMENES SUBSTITUES PAR UN GROUPE ARYLAMINE POSSEDANT DES PROPRIETES PHOTOCHROMIQUES
申请人:BREMAND RODRIGUE
公开号:WO2004099172A1
公开(公告)日:2004-11-18
The invention relates to novel benzo, naphtho or phenanthrochromene-type compounds which are of the formula (I) given below. These compounds (I) possess interesting photochromic properties. The invention also relates to their preparation, their applications as photochromes as well as to compositions containing them.