| abstract |
Disclosed is an antihalation dye and a photographic element containing such dye of the formula:n n wherein nX¹, X² independently represents -CR⁸R⁹-, -S-, -Se-, -NR¹⁰, -CH=CH- or -O-; n is an integer of 2 or 3; nR¹ and R² independently represent alkyl of 1 to 10 carbons or substituted alkyl of 1 to 10 carbons; nR³ represents a ring chosen from the set consisting of aryl, substituted aryl, and a heterocyclic ring containing 5 or 6 carbons in the ring with the proviso that when R³ is aryl or substituted aryl, n must be 2. nR⁴, R⁵, R⁶ and R⁷ independently represent hydrogen, alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons, R⁴ and R⁵ taken together or R⁶ and R⁷ taken together may represent the atoms necessary to form a 5 or 6-membered aliphatic ring, an aromatic six-membered ring, an aromatic 10-membered ring, a substituted aromatic six-member ring or a substituted aromatic 10-member ring; nR⁸, R⁹ independently represent alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons, aryl of 6-10 carbons, substituted aryl of 6-10 carbons; nR¹⁰ represents an alkyl of 1-10 carbons, substituted alkyl of 1-10 carbons, aryl of 6-10 carbons, substituted aryl of 6-10 carbons; nQ represents a counterion. |