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Synthesis and properties of inorganic/surfactant complex with nanometer compartment

纳米间隔无机/表面活性剂复合物的合成及性能

基本信息

批准号：
09640693
负责人：
HAYAKAWA Katumitu
金额：
$ 1.92万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

Adsolubilization and fluorescence quenching measurements revealed formation of surfactant aggregates in zeolite-surfactant complexes. A dye, rhodamine B, adsorbed not on zeolite but on zeolite-surfactant complexes. This is ascribed to solubilization by surfactant aggregates formed in the complexes, that is, "adsolubilization". The thermodynamic functions for the adsolubilization equilibrium were determined as a function of surfactant content in the complexes.Sodium ions of kanemite crystal were exchanged with cationic surfactant micelles and a folded sheet mesoporous crystal (FSM) was obtained. It has homogeneous and regularly oriented pores of nanometer. An enhanced energy transfer from an excited pyrene to proflavine, both adsolubilized in the FSM/surfactant complexes, was observed. The pyrene fluorescence was quenched in the presence of proflavine and the fluorescence of proflavine was observed, when only the pyrene was excited. Data analysis of this energy transfer revealed the formation of relatively large aggregates of surfactant with over 200 surfactant ions. XRI) measurements showed an increasing basal distance as the surfactant increases the chain length.A layered film of silica/surfactant complex was synthesized on a glass plate by the use of sol-gel reaction. The fluorescence spectra and depolarization of probes adsolubilized in the complex film were determined. The probes used were pyrene, anthracene, phenanthrene, rhodamine B, rhodamine 6G, and acridine orange. The depolarization data suggest that the probes are still mobile in the FSM/surfactant complex film. The quenching of pyrene fluorescence was observed in the presence of hexadecylpyridinium ions. The data analysis revealed not the Stem-Volmer type but the Forster type energy transfer. This finding suggested a restricted translational diffusion of the probes in the FSM/surfactant film.

增溶和荧光猝灭测试表明，在沸石-表面活性剂复合体中形成了表面活性剂聚集体。一种染料，罗丹明B，不吸附在沸石上，而是吸附在沸石-表面活性剂复合体上。这归因于络合物中形成的表面活性剂聚集体的增溶作用，即“增溶作用”。用阳离子表面活性剂胶束交换钾盐晶体中的钠离子，得到了折叠片状介孔晶体。它具有均匀的、规则取向的纳米孔。观察到激发态芘到前列腺素的能量传递增强，二者都吸附在FSM/表面活性剂络合物中。在前黄素存在下，Py的荧光被猝灭，当只有Py被激发时，观察到Py的荧光。对这种能量转移的数据分析表明，表面活性剂与200多个表面活性剂离子形成了相对较大的聚集体。XRI)测量表明，随着表面活性剂链长的增加，基距增大。采用溶胶-凝胶法在玻璃板上制备了二氧化硅/表面活性剂复合膜。测定了吸附在复合膜中的探针的荧光光谱和退极化。所用的探针为芘、菲、菲、罗丹明B、罗丹明6G和吖啶橙。退极化数据表明，探针在FSM/表面活性剂复合膜中仍然是可移动的。在十六烷基吡啶离子存在下，观察到了芘的荧光猝灭现象。数据分析揭示的不是Stem-Volmer类型，而是Forster类型。这一发现表明，探针在FSM/表面活性剂薄膜中的平移扩散受到限制。