Patent ID: 8884012

Claim:
A perimidine coupler of formula 1: where R and R′ are substituents independently selected from the group consisting of a hydrogen atom, C 1 to C 4 alkyl or a solubilizing moiety comprising a substituted or unsubstituted hydrocarbyl group; wherein at least one of R and R′ is not a hydrogen atom or C 1 to C 4 alkyl; and wherein R″ and R′″ can be independently selected from the group consisting of a hydrogen atom, C 1 to C 6 alkyl groups and halogens, and wherein the R and R′ solubilizing moieties comprising the substituted or unsubstituted hydrocarbyl group are selected from the group consisting of C 16 to C 70 linear, branched or cyclic alkyl groups, optionally, containing one or more heteroatoms; an oxyalkyl having a substituted or unsubstituted C 10 to C 70 hydrocarbyl tail; an ether having a substituted or unsubstituted C 10 to C 70 hydrocarbyl tail; a carbamate having a substituted or unsubstituted C 10 to C 70 hydrocarbyl tail; an amide having a substituted or unsubstituted C 10 to C 70 hydrocarbyl tail; an amine having a substituted or unsubstituted C 10 to C 70 hydrocarbyl tail; a carboxylate having a substituted or unsubstituted C 10 to C 70 hydrocarbyl tail; and polymers that include a C 10 to C 70 hydrocarbon backbone.