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Development of molecular manipulation technique based on host-guest interactions

基于主客体相互作用的分子操纵技术的发展

基本信息

批准号：
04555197
负责人：
MIYATA Mikiji
金额：
$ 6.72万
依托单位：
Gifu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1994
项目状态：
已结题

项目摘要

We aimed to develop a molecular manipulation technique on the basis of host-guest interactions. This research constitutes a pioneering work for an intransitive-verb-type technique, which utilizes an ability of organic molecules to assemble through weak chemical bonding automatically. The results are summarized as follows ;1.We employed steroidal molecules, particularly bile acids and their derivatives, as organic hosts. These molecules have been well-known since last century, but their abilities to form inclusion crystals are not known except deoxycholic acid and apocholic acid. We found that most of the steroids form the inclusion compounds with a variety of organic substances. The inclusion behaviors varies from one case to another. This indicates that inclusion phenomena are general in organic substances, because isomers of the steroids amount to over one billion.2.We determined over fifty crystal structures of the inclusion compounds. It was found that facially amphiphilic molecules associate through hydrogen bonding to give bilayred assemblies. Comparative studies of the assemblies clarified that the amphiphilic layrs stack together in various ways. This indicates that asymmetric middle-molecular-weight molecules cause some diversity.3.We confirmed that the controlled combination among multiple hydrogen-bonding groups may serve as the most important step for the manipulation technique of organic molecules. Four or three discrete hydrogen bonding groups associate together in various ways. This diversity is responsible for variable inclusion phenomena which is dependent on the host structures.4.We constructed a system suitable for studying on various aspects of the host-guest interactions by using personal computers. The system enabled us to construct and search a data base of the steroidal inclusion compounds.

我们的目标是开发一种基于主客体相互作用的分子操纵技术。这项研究构成了不及物动词类型技术的开创性工作，该技术利用有机分子通过弱化学键自动组装的能力。研究结果概括如下： 1.我们采用甾体分子，特别是胆汁酸及其衍生物作为有机主体。这些分子自上世纪以来就已广为人知，但除了脱氧胆酸和阿波胆酸外，它们形成包涵体晶体的能力尚不为人所知。我们发现大部分类固醇与多种有机物形成包合物。包含行为因情况而异。这表明包合现象在有机物中普遍存在，因为类固醇的异构体数量超过十亿。2.我们测定了50多个包合化合物的晶体结构。研究发现，表面两亲性分子通过氢键结合形成双层组装体。对组件的比较研究表明，两亲层以各种方式堆叠在一起。这表明不对称的中等分子量分子造成了一定的多样性。3.我们证实多个氢键基团之间的受控组合可能是有机分子操控技术中最重要的一步。四个或三个离散的氢键基团以各种方式结合在一起。这种多样性导致了依赖于宿主结构的可变包含现象。4.我们利用个人计算机构建了一个适合研究主客交互各个方面的系统。该系统使我们能够构建和搜索甾体包合物的数据库。