TY - JOUR
T1 - Nonlinear phosphorescence quenching mechanism of gadolinium labeled porphyrin by oxygen on filter paper
AU - Zhao, Huimin
AU - Zang, Lixin
AU - Qin, Feng
AU - Wang, Peng
AU - Zhao, Hua
AU - Zhang, Zhiguo
AU - Cao, Wenwu
N1 - Funding Information:
This research was supported in part by National Key Basic Research Program (973 Program, Grant No. 2013CB632900) and the National Natural Science Foundation of China (Grant No. 61308065).
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - Nonlinear phosphorescence quenching mechanism of gadolinium labeled hematoporphyrin monomethyl ether (Gd-HMME) by oxygen on the filter paper was studied. The intensity Stern-Volmer plot was found to be approximately linear for oxygen concentration from 10% to 100%, but showing a negative curvature from 0% to 10%. The lifetime plot has similar changing trend. The intensity plot is slightly higher than the lifetime plot reflecting the existence of static quenching. The nonlinear responses were related to the nonlinear solubility of oxygen, which perfectly satisfy the nonlinear solubility model. Data analysis indicates that the static quenching rate constant is unchanged and the percentage of static quenching is about 35% ± 3% in the whole range of oxygen concentration.
AB - Nonlinear phosphorescence quenching mechanism of gadolinium labeled hematoporphyrin monomethyl ether (Gd-HMME) by oxygen on the filter paper was studied. The intensity Stern-Volmer plot was found to be approximately linear for oxygen concentration from 10% to 100%, but showing a negative curvature from 0% to 10%. The lifetime plot has similar changing trend. The intensity plot is slightly higher than the lifetime plot reflecting the existence of static quenching. The nonlinear responses were related to the nonlinear solubility of oxygen, which perfectly satisfy the nonlinear solubility model. Data analysis indicates that the static quenching rate constant is unchanged and the percentage of static quenching is about 35% ± 3% in the whole range of oxygen concentration.
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U2 - 10.1016/j.jphotochem.2015.10.007
DO - 10.1016/j.jphotochem.2015.10.007
M3 - Article
AN - SCOPUS:84944754604
SN - 1010-6030
VL - 316
SP - 7
EP - 11
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
ER -