Patent ID: 8632950

Claim:
A lithographic printing plate precursor comprising: a cyanine dye including a first chromophoric group and a second chromophoric group that are different from each other; wherein the first chromophoric group has a main absorption in the infrared region; the second chromophoric group has a main absorption in the visible light region; and the cyanine dye has a structure according to Formula I: wherein Z 1 represents S, CR 1a R 1b , or —CH═CH—; Z 2 represents S, CR 2a R 2b , or —CH═CH—; G represents H, CO 2 R or CONR′R″; R, R′, and R″ independently represent H or an optionally substituted alkyl, aralkyl, or aryl group; R 1a , R 1b , R 2a , R 2b , R 3a , R 3b , R 4a , and R 4b independently represent an optionally substituted alkyl, aralkyl, or aryl group, and R 1a and R 1b , R 2a and R 2b , R 3a and R 3b , R 4a and R 4b are capable of forming a ring; R 1 , R 2 , R 3 , and R 4 independently represent an optionally substituted alkyl group; R 5 , R 6 , R 7 , and R 8 independently represent hydrogen or an optionally substituted alkyl or aryl group, and R 5 and R 6 , R 7 and R 8 are capable of forming a ring; R 9 represents hydrogen or an optionally substituted alkyl group; T 1 , T 2 , T 3 , and T 4 independently represent H, F, Cl, Br, I, CF 3 , CN, an optionally substituted alkyl, alkoxy, or aryl group, an optionally substituted annulated benzo ring, —CO 2 R a1 , —CONR a2 R a3 , —SO 2 NR a4 R a5 , —SO 2 R a6 , or —SO 3 − , and R a1 , R a2 , R 3a , R a4 , and R a5 independently represent hydrogen or an optionally substituted alkyl or aryl group and R a6 represents an optionally substituted alkyl or aryl group; m=0 or 2; LINK represents a divalent linking group; and counter ions are present to balance a charge of the cyanine dye.