Patent ID: 7781187

Claim:
A fluorescent dye having Formula III: wherein: t is an integer from 1 through 8; and X 4 and X 5 can be the same or can be different and are selected from the group consisting of O, S, N, NH, NH 2 and Se; and n 3 is an integer from 1 through 3; and B 1 and B 2 can be the same or can be different and are selected from the group consisting of H, OH, NH 2 , Cl, and F; and Q 3 is O or S; and Z 1 − is a monovalent anion, and further provided that when Z 1 − is present, then (CH 2 ) n6 -Z 2 − is absent; and X 8 is selected from the group consisting of H, CH 3 , and (CH 2 ) n6 -Z 2 − , where Z 2 − is a monovalent anion, and further provided that when Z 2 − is present, then Z 1 − is absent; and n 6 is an integer from 1 through 10.