| 摘要 |
Disclosed are compositions comprising at least one [benzo[4,5]imidazo(heterocycle)] compound, said [benzo[4,5]imidazo(heterocycle)] compound selected from the group consisting of structures I and II, wherein R<SUP>1 </SUP>and R<SUP>2 </SUP>are independently selected from the group consisting of a hydrogen atom, electron withdrawing group, organic 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; said at least one [benzo[4,5]imidazo(heterocycle)] compound being present 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 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.
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