Patent ID: 7645884

Claim:
An article, comprising: a composition comprising a polymer and at least one [benzo[4,5]imidazo(heterocycle)] compound; wherein the at least one [benzo[4,5]imidazo(heterocycle)] compound is present at 0.001 parts per million to about 20 weight percent relative to an overall weight of the composition, and wherein the at least one [benzo[4,5]imidazo(heterocycle)] compound is 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, and 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 the at least one [benzo[4,5]imidazo(heterocycle)] compound is present in the composition at a concentration sufficient to cause the composition to exhibit upon exposure to an excitation radiation having a wavelength of from about 330 nanometers to about 390 nanometers, 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.