TY - JOUR
T1 - X‐RAY INDUCED VISIBLE LUMINESCENCE OF PORPHYRINS
AU - Kokotov, Sophia
AU - Lewis, Aaron
AU - Neumann, Ronny
AU - Amrusi, Shmuel
PY - 1994/3
Y1 - 1994/3
N2 - A concept has been presented whereby X‐ray irradiation can be used to induce visible luminescence of chromophores such as porphyrins. The essential aspects of the idea have been demonstrated in a supramolecular assembly consisting of a water‐dispersed polystyrene latex with an embedded scintillating compound, 2,5‐diphenyloxa‐zole, and an externally attached hematoporphyrin. X‐ray excitation of the assembly yields an emission spectra typical for hematoporphyrin with fluorescent yields. of up to 3% with respect to 2,5‐diphenyloxazole emission. Significant quenching in the presence of dioxygen indicates that singlet oxygen is formed at atmospheric conditions.
AB - A concept has been presented whereby X‐ray irradiation can be used to induce visible luminescence of chromophores such as porphyrins. The essential aspects of the idea have been demonstrated in a supramolecular assembly consisting of a water‐dispersed polystyrene latex with an embedded scintillating compound, 2,5‐diphenyloxa‐zole, and an externally attached hematoporphyrin. X‐ray excitation of the assembly yields an emission spectra typical for hematoporphyrin with fluorescent yields. of up to 3% with respect to 2,5‐diphenyloxazole emission. Significant quenching in the presence of dioxygen indicates that singlet oxygen is formed at atmospheric conditions.
UR - http://www.scopus.com/inward/record.url?scp=0028395378&partnerID=8YFLogxK
U2 - 10.1111/j.1751-1097.1994.tb05052.x
DO - 10.1111/j.1751-1097.1994.tb05052.x
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C2 - 8016220
AN - SCOPUS:0028395378
SN - 0031-8655
VL - 59
SP - 385
EP - 387
JO - Photochemistry and Photobiology
JF - Photochemistry and Photobiology
IS - 3
ER -