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Picosecond diffuse reflectance laser flash photolysis
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1986
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PhotonicsSpectroscopic MethodEngineeringLaser PhotochemistryOptical PropertiesSpectroscopyNatural SciencesApplied PhysicsOptical SpectroscopyAbsorption SpectroscopyLight AbsorptionChemistryTriplet StateOpaque SamplePhotophysical PropertyTransient Absorption
Picosecond pumping and probing of an opaque sample of xanthone adsorbed on to silica gel demonstrates the growth of a transient absorption at 590 nm which levels to a plateau within 800 ps; on the basis of spectral evidence from nanosecond diffuse reflectance laser flash photolysis, this transient is assigned as the triplet state of xanthone.