| abstract |
Particularly, a chromene compound represented by the following formula (1) is provided, which has a short fading half-life even under a low temperature, among general-purpose polymer solid matrices. (Wherein R 1 is a hydroxyl group, etc., R 2 and R 3 are aryl groups and the like, X is a divalent group such as an arylene group, etc. C * is a spiro carbon atom, and the spiro ring A has 4 to 12 And at least one reducing carbon atom constituting the ring A is represented by the following formula (4) (Wherein R 7 and R 8 are a cycloalkyl group and the like) |