1999
DOI: 10.1111/j.1751-1097.1999.tb03322.x
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Determination of Fluorescence Yields, Singlet Lifetimes and Singlet Oxygen Yields of Water‐Insoluble Porphyrins and Metalloporphyrins in Organic Solvents and in Aqueous Media

Abstract: Abstract— Fluorescence quantum yields and singlet lifetimes for a wide range of hydrophilic to hydrophobic porphyrins and metalloporphyrins have been determined in toluene, methanol or acetone. Photosensitized singlet oxygen yields have been determined in the same solvents. For some porphyrins, the same quantities were determined in an aqueous medium, through use of an amphiphilic polymer to solubilize the porphyrin sensitizer and target molecule, 1, 3‐diphenylisobenzofuran. Because rate constants for the deac… Show more

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Cited by 66 publications
(37 citation statements)
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“…[b] PLQY measurements conducted versus tetraphenylporphyrin in toluene as the reference standard ( Φ =0.11), see Ref. .…”
Section: Resultsmentioning
confidence: 99%
“…[b] PLQY measurements conducted versus tetraphenylporphyrin in toluene as the reference standard ( Φ =0.11), see Ref. .…”
Section: Resultsmentioning
confidence: 99%
“…518 [14,4] 555 [6,9] 592 [5,5] the case with porphyrin aggregates. 24 In the P-(Lys) n conjugate, however, the strong electrostatic repulsion between the heavily positively charged polylysine side chains appears large enough to potentially weaken interactions which lead to stacking of the solvated porphyrin rings.…”
Section: Photosensitized Histidine Degradationmentioning
confidence: 99%
“…20,[22][23][24] Conventionally ϕ ∆ , the singlet oxygen quantum yield, is obtained from Stern-Volmer plots of the data as shown in equation 5. 20, 22, 23, 25…”
Section: Chemical Quenching With Dpbfmentioning
confidence: 99%
“…The spin orbit coupling produced by iodine or bromine facilitates intersystem crossing into the triplet state, which enables energy transfer to molecular oxygen. 1,5,22,23,28,29 Energy transfer from the porphyrin in the triplet state to molecular oxygen generates singlet oxygen, which then degrades DPBF. 30 …”
Section: Chemical Quenching With Dpbfmentioning
confidence: 99%
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