MICROSCOPIC ENVIRONMENTS IN MICELLES AND THEIR DYNAMIC BEHAVIORS BY PROBING PHOSPHORECENCE OF SINGLET OXYGEN

1. 在AOT/庚烷/水的反胶束中，研究了氧对光激发分子的猝灭作用，以及单氧猝灭后的时间分辨磷光现象。(1)高压下反胶束的表征：测定了Ru (bpy) _3^<2+>在猝灭剂(Q) K_3Fe (CN) _6存在下在反胶束中的发光衰减曲线。通过分析，确定了高压下聚合数和速率参数是W_0 （=[H_2O]/[AOT]）的函数。(2) 1-吡啶磺酸钠（PS）、1,3,6,8-吡啶磺酸四钠（PTS）和Ru (bpy) _3^<2+>的氧猝灭：PS的单重态和三重态猝灭，PTS的三重态呈单指数衰减。另一方面，Ru (bpy) _3^<2+>的衰减曲线为胶束型。结果表明，PS和PTS分别位于油相与胶束界面附近和胶束中心的水池中，Ru (bpy) _3^<2+>位于胶束界面与水池之间。在胶束中。假设氧分子在各相中处于平衡状态，讨论了胶束中的猝灭动力学。(3)使用InGaAs引脚光电二极管测量单重态氧的磷光衰减：使用PS和Ru (bpy) _3^<2+>作为敏化剂，其衰减表现为单指数衰减，而PTS的衰减表现为双指数上升和衰减。这些结果支持(2).2中描述的胶束模型。在SDS和CTAC胶束中进行的氧猝灭和芘和9-乙酰蒽增敏的单线态制氧实验正在继续得到最终数据。

1. The quenching of the photo-excited molecules by oxygen and a time-resolved phosphorescence of singler oxygen followed by the quenching were investigated in reversed micelles of AOT/heptane/water as a function of pressure up to 400 MPa. (1) Characterization of reversed micelles at high pressure : The decay curves of luminescence of Ru (bpy) _3^<2+> in the presence of quencher (Q) , K_3Fe (CN) _6, were measured in reversed micelles. From the analysis, the aggregation number and the rate parameters were determined as a function of W_0 (=[H_2O]/[AOT]) at high pressure. (2) The oxygen quenching of sodium 1-pyrenesulfonate (PS) , tetrasodium 1,3,6,8-pyrenesulfonate (PTS) and Ru (bpy) _3^<2+> : The quenching of singlet and triplrt states of PS,and the triplet state of PTS showed a single exponential decay. On the other hand, the decay curves measured for Ru (bpy) _3^<2+> were a micelle type. From these results, it was concluded that PS and PTS are located near the interface between the oil phase and the micelle and in the water pool in the center of the micelle, respectively, and Ru (bpy) _3^<2+> resides between the interface and the water pool.in the micelle. The quenching dynamics in the micelle is discussed by assuming that oxygen molecules are in equilibrium in each phase. (3) Phosphorescence decay measurements of singlet oxygen using InGaAs pin photodiode : The decays showed single exponential decay for the use of PS and Ru (bpy) _3^<2+> as sensitizers, whereas double exponentials with rise and decay for PTS.These results support the model of the micelle described in (2).2. Experiments of the oxygen quenching and the singlet oxygen generation sensitized by pyrene and 9-acetylanthracene in SDS and CTAC micelles are continuing to obtain the final data.