Patent ID: 8398722

Claim:
A fluorescent dye chosen from dyes of formula (I): organic acid salts, mineral acid salts, optical isomers, geometric isomers, and solvates thereof, wherein, in formula (I): m is 0 or 1; n is 1 or 2; p is chosen from integers ranging from 0 to 4 inclusive; R 1 , which may be identical or different, are each chosen from halogens, optionally substituted (C 1 -C 6 )alkyl groups, (C 1 -C 6 )alkoxy groups, (C 1 -C 6 ) alkylthio groups, (di)(C 1 -C 6 ) (alkyl)amino groups, (C 1 -C 6 )polyhaloalkyl groups, hydroxyl groups, (C 1 -C 6 ) polyhydroxyalkyl groups, polyhydroxy (C 1 -C 6 )alkoxy groups, nitro groups, cyano groups, R-G-C(G′)- groups, R—C(G′)-G- groups, R′S(O) 2 —N(R)— groups, and RR′N—S(O) 2 — groups, with G and G′, independently of one another, each chosen from oxygen, sulfur, and groups NR′, and R and R′, independently of one another, each chosen from hydrogen and (C 1 -C 6 ) alkyl groups; R 2 and R 3 , independently of one another, are each chosen from optionally substituted (C 1 -C 6 )alkyl groups; B is chosen from optionally substituted aryl groups and optionally substituted heteroaryl groups; L is chosen from divalent C 1 -C 20 hydrocarbon-based chains which are optionally substituted, optionally interrupted, and/or optionally terminated at one end with at least one group chosen from: i) divalent groups chosen from: —N(R a )—; —N + (R a )(R b )-An − ; —O—; —S—; —CO—, and —SO 2 —, with R a and R b , independently of one another, each chosen from hydrogen, (C 1 -C 6 )alkyl groups, hydroxyl (C 1 -C 6 )alkyl groups, and (di)(C 1 -C 6 ) (alkyl)amino (C 1 -C 6 )alkyl groups, and An − chosen from anionic counterions, and ii) cationic heterocyclic and heteroaryl Het + An − groups, with An − chosen from anionic counterions, and Het + chosen from saturated and unsaturated heterocycles comprising 5 to 10 members and saturated and unsaturated heteroaryls comprising 5 to 10 members; Y is chosen from: i) hydrogen; ii) alkali metals; iii) alkaline earth metals; iv) NR + R α R β R γ R δ An″ − ammonium groups and P + R α R β R γ R δ An″ − phosphonium groups, with R α , R β , R γ , and R δ , independently of one another, each chosen from hydrogen and (C 1 -C 4 )alkyl groups, and An″ − chosen from anionic counterions; and v) thiol-function-protecting groups; An − is chosen from anionic counterions; and when n is 2, then m is zero, and when n is 1, then m is 1.