Patent ID: 7230113

Claim:
A composition comprising at least one [benzo[4,5]imidazo(heterocycle)] compound, said at least one [benzo[4,5]imidazo(heterocycle)] compound being selected from the group consisting of structures I and II: wherein each R 1 is independently selected from the group consisting of a hydrogen atom, electron withdrawing group, aliphatic group, cycloaliphatic group, aromatic group, divalent 1,2-cycloalkylidene group, or combinations thereof; wherein each R 2 is independently selected from the group consisting of trifluoromethyl, acetyl, benzoyl, propanoyl, butanoyl, pentanoyl, methoxycarbonyl, ethoxycarbonyl, acetoacetyl, nitro, chloro, bromo, iodo, fluoro, alkylsulfonyl, arylsulfonyl, aliphatic group, cycloaliphatic group, aromatic group. divalent 1,2-cycloalkylidene group, or combinations thereof; “q” is independently an integer from 1–4, L is a linking group, and “r” is independently 0 or 1; and wherein said at least one [benzo[4,5]imidazo(heterocycle)] compound is present in said composition at a concentration sufficient to cause said composition to exhibit upon exposure to an excitation radiation having a wavelength of from about 330 nanometers to about 390 nanometers, a a maximum fluorescence emission wavelength of greater than or equal to about 470 nanometers; and a Stokes shift of greater than or equal to about 80 nanometers; wherein the wavelengths are measured in bisphenol A polycarbonate matrix.