| 芘为荧光探针研究SDS/H2O二元体系的热相变 |
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| 引用本文： | 伍炯如,田永驰,梁映秋.芘为荧光探针研究SDS/H2O二元体系的热相变[J].物理化学学报,1991,7(3):329-332. |
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| 作者姓名： | 伍炯如 田永驰 梁映秋 |
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| 作者单位： | Institute of Theoretical Chemistry, Jilin University, Changchun 130021 |
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| 摘 要： | 以芘作为荧光探针, 对十二烷基硫酸钠(SDS)40 g%的水溶液在-20 ℃～30 ℃温区的相变进行了研究。该二元体系的主要相变是凝聚胶-液晶的转变, 测定其相变温度为20 ℃。自由水形成的冰层在0 ℃融化, 由此导致在化冰前后体系呈现出不同的凝聚胶相。在-17 ℃退火处理, 体系出现了新的凝聚胶相。以上出现的各相均可由I_E/I_M值清楚地表征, 从而首次证实了这种探针方法为一种成功的膜模拟体系相变的研究手段。
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| 关 键 词： | 十二烷基硫酸钠/水 芘 荧光探针 相变 |
| 收稿时间： | 1990-02-17 |
| 修稿时间： | 1990-10-04 |
PHASE TRANSITION OF SODIUM DODECYL SULFATEWATER SYSTEM: PROBING BY PYRENE FLUORESCENCE |
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| Wu Jiongru Tian Yongchi Liang Yingqiu.PHASE TRANSITION OF SODIUM DODECYL SULFATEWATER SYSTEM: PROBING BY PYRENE FLUORESCENCE[J].Acta Physico-Chimica Sinica,1991,7(3):329-332. |
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| Authors: | Wu Jiongru Tian Yongchi Liang Yingqiu |
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| Institution: | Institute of Theoretical Chemistry, Jilin University, Changchun 130021 |
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| Abstract: | The phase transition of 400% sodium dodecyl sulfate (SDS)/water system has been studied by employing pyrene as a fluorescent probe in the temperature range of -20 ℃—+30 ℃. The binary system mainly undergoes coagel-liquid crystal phase transition at about 20 ℃. Free water layer melts at 0 ℃, below and above that different coagel phases were found. Anoval coagel phase was brought forth after annealing at -17 ℃ for 12 hours. All these phases have been fairly characterized by I_E/I_M. Structurual aspects of these phases are idscussed concerning with the fluorescence information. |
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| Keywords: | Sodium dodecyl sulfate/water Pyrene Fluorescence probe Phase transition |
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