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中文题名:

 多种有机小分子/离子构筑主体晶格的氢键包合物的合成与晶体结构分析    

姓名:

 曹丽丽    

保密级别:

 公开    

学科代码:

 070304    

学科专业:

 物理化学(含:化学物理)    

学生类型:

 硕士    

学位:

 理学硕士    

学位年度:

 2007    

校区:

 北京校区培养    

学院:

 化学系    

研究方向:

 氢键包合物    

第一导师姓名:

 李奇    

第一导师单位:

 北京师范大学化学学院    

提交日期:

 2007-06-06    

答辩日期:

 2007-06-11    

外文题名:

 Synthesis And Crystal Structure Of Hydrogen Bonded Inclusion Compounds Built By Multiple Small Organic Molecules Or Ions    

中文关键词:

 主体分子 ; 晶体结构 ; 氢键 ; 包合物 ; 联二硫脲 ; 2 ; 6-吡啶二羧酸 ; 胍离子    

中文摘要:
本文选用联二硫脲,2,6-吡啶二羧酸,以及苯三甲酸和三聚氰酸作为主体组分,合成了八个四烷基铵阳离子为客体的氢键包合物,并用X-射线单晶衍射法测定其结构。得到的这些包合物可以分为以下三个体系:1.以联二硫脲一价阴离子为主体的氢键包合物。研究发现,联二硫脲分子在碱性环境下,失去一个质子,具有平面构型,在与四丁基铵的包合物中,以氢键链条构成的层状主体晶格存在,而在与四乙基铵的包合物中,生成二维无限伸展的氢键主体层,体现了很好的构建平面网格的能力。2.选用两种平面型的主体分子,即三聚氰酸和2,6-吡啶二羧酸,与四丁基氢氧化铵作用,在水分子参与下,得到主体晶格分别呈氢键宽链和波形层状的包合物。3.在上述单一主体包合物的基础上,进行多组分主体包合物的研究。所采用的主体组分有:苯三甲酸与胍离子,联二硫脲分子与2,6-吡啶二羧酸,2,6-吡啶二羧酸与胍离子,获得了四种结构新颖的四烷基铵阳离子的管道状包合物。通过这些包合物晶体的研究,可以看出联二硫脲分子(或离子)具有很好的氢键网格生成能力,辅以其他多羧酸将是管道类包合物的理想主体。胍离子可以改进单一主体氢键包合物的层状主体晶格,生成多种多样的管道状包合物。
外文摘要:
Eight tetralkylammonium inclusion compounds in which dithiourea , trimesic acid and pyridine-2,6-dicarboxylic acid as well as cyanuric acid serve as the host molecules have been prepared and unambiguously characterized by single X-ray analysis. These inclusion compounds can be divided into three groups as following.1. Dithiourea is good at generating both donor and acceptor hydrogen bonds. Dithiourea molecules show a coplanar configuration for it loses a proton when mixed with tetraalkylammonium. Thus we got two inclusion compounds in which dithiourea plays the role of host molecules and tetraalkyl ammonium ions act as guest parts. The dithiourea anions make a two dimensional layer-like network with tetraethyl ammonium and a one dimensional chain with tetrabutylammonium ions.2. Both cyanuric acid and pyridine-2,6-dicarboxyl acid show a coplanar structure. Two tetrabutyl ammonium inclusion compounds have been obtained in which cyanuric acid and pyridine-2,6-dicarboxyl acid serve as the host molecules respectively. In the final structure of the cyanuric acid inclusion compounds, a hydrogen bonded wide ribbon is constructed by the cyanuric acid and water molecules. In the other one, a hydrogen bonded sheet is made by the pyridine-2,6-dicarboxyl acid and water molecules.3. The fact that single host molecules are more likely to make simple chain or layer like host lattice forces us to explore novel multiple host molecules to build various kinds of inclusion compounds. Thus we adopt trimesic acid and guanidinium ions, pyridine-2,6-dicarboxyl acid and guanidinium ions. What is more, pyridine-2,6-dicarboxyl acid and dithiourea are also used collectively as the host molecules. The attempts to develop three dimensional structures with multiple host molecules end with encouraging results. Four kinds of different channel-like tetraakylammoniun inclusion compounds have been prepared and determined. The study mentioned above indicates that dithiourea molecules with the help of other carboxyl acids will be a promising and powerful host building block. Besides, guanidinium ions and carboxyl acids also make exquisite channel-typed host lattice in the inclusion compounds.
参考文献总数:

 66    

作者简介:

 曹丽丽,北京师范大学化学学院04级硕士。硕士期间研究方相是氢键包合物,主要工作是采用硫脲衍生物的联二硫脲作为包合物主体分子,另外还以芳香多羧酸为主体分子辅以胍离子为构筑主体晶格,得到管道状季铵阳离子包合物。    

馆藏号:

 硕070304/0710    

开放日期:

 2007-06-06    

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