Patent ID: 7048876

Claim:
A chromene compound represented by the following general formula (1), wherein R 1 and R 2 are, independently from each other, alkyl groups, aryl groups which may have a substituent, or heteroaryl groups which may have a substituent, and R 1 and R 2 together may constitute a ring; the ring X and the ring Y represented by, are, independently from each other, aromatic hydrocarbon rings or aromatic heterocyclic rings which may have a substituent; and the divalent bridge group A is represented by the following formula (1c-1) or (1c-2), wherein in the formula (1c-1), the Z represented by, is an alicyclic hydrocarbon ring or a heterocyclic ring, which may have a substituent, R 3 and R 4 are, independently from each other, hydrogen atoms, hydroxyl groups, alkyl groups, alkoxy groups, aralkyl groups, aralkoxy groups, amino groups, substituted amino groups, cyano groups, nitro groups, halogen atoms, halogenoalkyl groups, halogenoalkoxy groups or substituted or unsubstituted alicyclic hydrocarbon groups, and in the above formula (lc-2), R 5 , R 6 , R 7 and R 8 are, independently from each other, hydrogen atoms, hydroxyl groups, alkyl groups, cycloalkyl groups, alkoxy groups, aralkyl groups, aralkoxy groups, amino groups, substituted amino groups, cyano groups, nitro groups, substituted or unsubstituted aryl groups, substituted or unsubstituted heteroaryl groups, halogen atoms, halogenoalkyl groups or halogenoalkoxy groups, and two groups out of R 5 to R 8 may be combined together to form a ring, and W is a group represented by, wherein R 9 and R 10 are, independently from each other, hydrogen atoms, hydroxyl groups, alkyl groups, cycloalkyl groups, alkoxy groups, aralkyl groups, aralkoxy groups, amino groups, substituted amino groups, cyano groups, nitro groups, substituted or unsubstituted aryl groups, substituted or unsubstituted heteroaryl groups, halogen atoms, halogenoalkyl groups or halogenoalkoxy groups.