Patent ID: 7951938

Claim:
An electrophoretic dispersion comprising charged pigment particles dispersed in a fluorinated solvent, wherein said fluorinated solvent comprises the fluorinated porphyrin dye or colorant expressed by Formula (VII): wherein: m, n, p and q are independently 0-5; M is a divalent metal, an oxometal group, a halogenometal group or a hydroxymetal group; R 1 and R 2 are independently hydrogen, halogen, alkyl, heteroalkyl, aryl, heteroC 6-18 aryl, a halogenated alkyl, a halogenated heteroalkyl, a halogenated aryl, a halogenated derivative of heteroC 6-18 aryl, R′O—, R′S—, R′R″N—, R′C(O)—, R′OC(O), R′C(O)O—, R′C(O)NR″, R′R″NC(O), R′NHC(O)NR″—, R′SO 2 NR″—, R′R″NSO 2 —, wherein R′ and R″ are independently hydrogen, alkyl, heteroalkyl, aryl, heteroC 6-18 aryl, a halogenated alkyl, a halogenated heteroalkyl, a halogenated aryl, or a halogenated heteroC 6-18 aryl; or R 1 and R 2 are independently R f -A-; R f is a fluorinated alkyl, fluorinated heteroalkyl, fluorinated aryl, fluorinated heteroC 6-18 aryl, or a fluorinated polymeric or oligomeric moiety; and A is absent or a linking chain comprising one or more of the following, connected together: —O—, —S—, —SO—, —SO 2 —, —SO 2 NR′—, —NR'—, —NR′CO—, —NR′COO—, —NR′CONR″—, —NR′CS—, —NR′CSO—, —NR′CSNR″—, —OC(O)—, —OCO 2 —, —C(O)O—, —OC(O)N′R—, alkylene, arylene, a halogenated alkylene, and a halogenated arylene; provided that the dyes or colorants Formula (VII) comprise at least about 25% by weight of fluorine.