量子产额
单线态氧
发光
材料科学
电介质
水溶液
分析化学(期刊)
氧气
荧光
光化学
物理化学
光学
化学
物理
光电子学
量子力学
色谱法
作者
E. S. Jarnikova,Marina V. Parkhats,Alexander S. Stasheuski,Sergei V. Lepeshkevich,Boris M. Dzhagarov
标识
DOI:10.1134/s0030400x17040221
摘要
The quantum yields and lifetimes of photosensitized luminescence of the 1Δ
g
state of singlet oxygen in an aquatic media with a controlled concentration of dielectric anisotropy centers (polyethylene glycol) have been measured using the methods of laser fluorometry. It is established that the quantum yield and the rate constant (k
r
) of the a
1Δ
g
→ X
3Σ
-
luminescence of 1O2 increase as the polymer concentration increases. The effect is analyzed within a general approach involving a relationship between kr and dielectric properties of the medium and is explained by the increased density of photon states and the local field factor in the space around O2(а
1Δ
g
).
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