Stable Yellow Imidazolium Compounds

A compound having a structure according to Formula V and tautomers and salts thereof:

• wherein:
• (i) R1b, R1c and R1f are independently selected from the group consisting of hydrogen, alkyl, halogen substituted alkyl, alkenyl, alkynyl, aryl, hydroxyalkyl, aminoalkyl, alkyl group carrying a quaternary ammonium cation, alkoxy, aryloxy, acyl, halogen, a heterocyclic moiety, thioether, thiol with a linker group, alkylsulfonate, alkylsulfate, carboxylalkyl, acrylamide or substituted acrylamides with a linker group, vinylsulfone with a linker group, sulfonyl ethyl sulfate with a linker group, halo-s-triazines with a linker group, halopyrimidines with a linker group, haloquinoxalines with a linker group, or attached to a polymer backbone through a linker group;
• (ii) R1a, R1d, and R1h are independently selected from the group consisting of hydrogen, alkyl, halogen substituted alkyl, alkenyl, alkynyl, aryl, hydroxyalkyl, aminoalkyl, alkyl group carrying a quaternary ammonium cation, a heterocyclic moiety, thiol with a linker group, alkylsulfonate, alkylsulfate, carboxylalkyl, acrylamide or substituted acrylamides with a linker group, vinylsulfone with a linker group, sulfonyl ethyl sulfate with a linker group, halo-s-triazines with a linker group, halopyrimidines with a linker group, haloquinoxalines with a linker group, or attached to a polymer backbone through a linker group;
• and
• (iii) R1e and R1g are selected from the group consisting of hydrogen, alkyl, halogen substituted alkyl, alkenyl, alkynyl, aryl, hydroxyalkyl, aminoalkyl, alkyl group carrying a quaternary ammonium cation, a heterocyclic moiety, thiol with a linker group, alkylsulfonate, alkylsulfate, carboxylalkyl, acrylamide or substituted acrylamides with a linker group, vinylsulfone with a linker group, sulfonyl ethyl sulfate with a linker group, halo-s-triazines with a linker group, halopyrimidines with a linker group, haloquinoxalines with a linker group, or are attached to a polymer backbone through a linker group, or part of a cyclic structure and joined by substituted or unsubstituted alkyl or heteroalkyl groups.