DELAYED FLUORESCENCE AND SOME PROPERTIES OF THE CHLOROPHYLL TRIPLETS |
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| Authors: | C A Parker Thelma A Joyce |
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| Institution: | Royal Naval Scientific Service, Admiralty Materials Laboratory, Holton Health, Poole, Dorset |
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| Abstract: | –P-Type delayed fluorescence and sensitised P-Type delayed fluorescence have been observed from solutions of chlorophylls a and b in ethanol. E-Type delayed fluorescence has been observed from solutions in propylene glycol. The measurements in propylene glycol have yielded approximate values for the triplet energies of chlorophylls a and b. Measurements of the emissions from the ethanolic solutions have been used to calculate approximate values of the triplet formation efficiencies in this solvent. The sums of the fluorescence and triplet formation efficiencies in ethanol fall far short of unity and the triplet formation efficiencies therefore need to be confirmed by an independent method before they can be accepted with confidence. |
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