Another Photochromism of a Spironaphtoxazine Due to the Geometric isomerization of the Open-Form
The photodecoloration rate of colored spironaphtho[1,2-b]oxazine <B>2</B> was much slower than the corresponding [2,1-b]oxazine <B>1</B>. Existence of another photochromic system between two of the open-form isomers of <B>2</B>, in addition to the well-known one for <B>1</B> between the closed and the open forms, was proved.
- Chemistry letters
Chemistry letters 1997(7), 655-656, 1997-07
The Chemical Society of Japan