Patent ID: 7776614

Claim:
A method of visually testing a compound for its capability of quenching singlet excited state energy from a photon-excited, photodegradable photoactive compound, comprising: dissolving a photoactive compound in a solvent to form a composition (1), applying composition (1) onto a TLC plate, and exposing the composition (1) to UV radiation in an amount sufficient for the photoactive compound to reach an electronic singlet excited state and fluoresce; visually observing a degree of fluorescence of composition (1) in a dark environment; dissolving said photoactive compound and a test compound in a solvent to form a mixture (2), applying mixture (2) onto a TLC plate, and exposing the mixture (2) to UV radiation to the same degree as composition (1); visually observing a degree of fluorescence of mixture (2) in a dark environment; and visually comparing the degree of fluorescence of composition (1) with the degree of fluorescence of mixture (2) to determine if there is a difference in the degree of fluorescence.