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| 用正电子素探测叶绿素三线激发态浓度的变化 | |
| 引用本文： | 姚士冰,周绍民,方江陵.用正电子素探测叶绿素三线激发态浓度的变化[J].物理化学学报,1988,4(2):136-140. |
| 作者姓名： | 姚士冰 周绍民 方江陵 |
| 作者单位： | Department of Chemistry; Institute of Physical Chemistry; Xiamen University;Department of Physics; Xiamen University |
| 摘 要： | 测量了在不同光强下叶绿素环已烷溶液(77 K)和酒精溶液(296 K)的正电子湮没寿命谱。提出正电子素光磁湮没模型以解释实验事实。在77 K固化的叶绿素环已烷溶液中, 正电子湮没寿命谱长寿命组分的湮没参数I_2和Λ_2随光强变化而呈现规律性变化, 表明可利用正电子素光磁猝灭效应来追踪光敏剂分子三线激发态浓度的变化。 |
| 收稿时间： | 1986-09-20 |
| 修稿时间： | 1987-04-10 |
POSITRONIUM AS A PROBE FOR CONCENTRATION CHANGES OF PHOTO-EXCITED TRIPLET STATES OF CHLOROPHYLL |
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| Yao Shibing,Zhou Shaomin, Fang Jiangling.POSITRONIUM AS A PROBE FOR CONCENTRATION CHANGES OF PHOTO-EXCITED TRIPLET STATES OF CHLOROPHYLL[J].Acta Physico-Chimica Sinica,1988,4(2):136-140. |
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| Authors: | Yao Shibing Zhou Shaomin Fang Jiangling |
| Institution: | Department of Chemistry; Institute of Physical Chemistry; Xiamen University;Department of Physics; Xiamen University |
| Abstract: | The measurements of positron annihilation lifetime spectrum for chlorophyll in cyclohexane (77 K) and in alcohol (296 K) were carried out under illumination at different light intensity. A photomagnetic positronium annihilation model was proposed to explain the experimental facts. The changes of annihilation parameters I_2 and Λ_2 for frozen chlorophyll cyclohexan solution at 77 K with relative light intensity suggest that the photomagnetic quenching effect of positronium can serve to trace the concentration changes of photo-excited triplet states in photosensitive material. |
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