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

通过探测单线态氧的磷光来研究胶束的微观环境及其动态行为

• 批准号: 06640651
• 负责人: OKAMOTO Masami
• 金额: $ 1.28万
• 依托单位: KYOTO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06640651/
• 关键词: Singlet Oxygen; Oxygen Quenching; Reversed Micelle; High Pressure; Singlet State; Triplet State

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.

1.研究了在AOT/正庚烷/水反胶束体系中，氧对光激发分子的猝灭作用，以及随着压力的增加，光激发分子的时间分辨发光和猝灭现象。(1)高压下反胶束的表征：在反胶束中测量了Ru(Bpy)_3^&lt；2+&gt；在猝灭剂K_3Fe(CN)_6存在下的发光衰减曲线。通过分析，确定了高压下聚集数和速率参数是W0(=[H2O]/[AOT])的函数。(2)1-丙酮磺酸钠(PS)、1，3，6，8-四钠(PTS)和Ru(Bpy)_3~(2+)的氧猝灭：PS的单态和三态猝灭，PTS的三重态呈单指数衰减。另一方面，Ru(Bpy)_3^&lt；2+&gt；的衰变曲线为胶束型。结果表明，PS和PTS分别位于油相-胶束界面附近和胶束中心的水池中，Ru(Bpy)_3和lt；2+位于胶束中的界面和水池之间。通过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)用InGaAsPIN光电二极管测量了单线态氧的磷光衰减：以PS和Ru(Bpy)_3~(2+)和Gt~(2+)为增敏剂，光致衰减率为单指数衰减率，而PtS为双指数衰减率。这些结果支持文献(2)2中所述的胶束模型。在十二烷基硫酸钠和十六烷基三甲基氯化铵胶束中的氧猝灭和9-乙酰基菲敏化的单线态氧产生的实验仍在继续获得最终数据。

项目成果

Krishna K.Pandey: "A Bell-Shape Dependence on Solvent Viscosity of the Fluorescence Quenching of 9,10-Dicyanoanthracene by Oxygen in Solution" Chemical Physics Letters. 224. 417-423 (1994)

Krishna K.Pandey：“溶液中氧气对 9,10-二氰基蒽荧光猝灭的钟形依赖性对溶剂粘度的影响”化学物理快报。

S. A. El-Daly: "Fluorescence Quenching of N,N'-bis (2,5-di-tert-butylphenyl) -3,4:9,10-perylenebis (di-carbo-ximide) (DBPI) by Molecular Oxygen" Journal of Photochemistry and Photobiology A. 91. 105-110 (1995)

S. A. El-Daly：“分子氧对 N,N-双（2,5-二叔丁基苯基）-3,4:9,10-苝双（二碳酰亚胺）（DBPI）的荧光猝灭”

Masami Okamoto: "Dynamics of Luminescence Quenching Reversed Micelles - An Apporoach from High Pressure Study" Zairyou. 45. 256-261 (1996)

Masami Okamoto：“发光淬灭反向胶束的动力学 - 高压研究的方法”Zairyou。

K. K. Pandey: "A Bell-Shape Dependence on Solvent Viscosity of the Fluorescence Quenching of 9,10-Dicyanoanthracene by Oxygen in Solution" Chemical Physics Letters. 224. 417-423 (1994)

K.K. Pandey：“溶液中氧气对 9,10-二氰基蒽荧光猝灭的钟形依赖性对溶剂粘度的影响”化学物理快报。

S.A.El-Daly: "Fluorescence Quenching of N,N'-bis (2,5-di-tert-butylphenyl) -3,4 : 9,10-perylenebis (di-carbo-ximide) (DBPI) by Molecular Oxygen" Journal Photochemistry and Photobiology A : , Chemistry. 91. 105-110 (1995)

S.A.El-Daly：“分子氧对 N,N-双（2,5-二叔丁基苯基）-3,4 : 9,10-苝双（二碳酰亚胺）（DBPI）的荧光猝灭”