基于螺旋桨型、T型和线型刚棒的刚柔嵌段低聚物的合成及自组装性质的研究
发布时间：2018-10-17 13:45
【摘要】：在本体和溶液中,两亲性的钢棒-线团分子具有很强的能力自组装成各种各样的超分子聚集体。本文中,我们合成了一系列以三苯胺和三联苯为钢棒中心,聚环氧乙烷(PEO)为柔性线团的钢棒-线团分子。利用核磁共振(1HNMR)和飞行质谱(MALDI-TOF-MS)对所合成的目标分子结构进行了表征。此外,我们通过差示扫描量热法(DSC)、X-ray散射实验(XRD)、圆二色谱(CD)、场发射透射电子显微镜测试(TEM)以及原子力显微镜(AFM)对这些目标分子在本体以及溶液中的自组装行为进行了研究。结果表明,以三苯胺为核心的具有不同长度(PEO)链的螺旋桨型两亲性分子A1,A2,A3,A4在本体状态中均自组装成倾斜柱状结构。而在水溶液中A2,A3,A4首先自组装成纳米环状结构。然而有趣的是,经过一段时间后,该系列分子自组装形貌发生改变。分别自组装成纳米球、纳米纤维结构。分子A1自组装成胶束结构,最终形成纳米片状结构,A2自组装成长的纳米带状结构,A3自组装成纳米片状结构,A4自组装形成稳定的螺旋交错缠绕的纳米纤维结构。通过CD以及AFM、TEM实验发现分子A3,A4自组装形成的组装体具有一定的螺旋性质。而合成的基于三联苯基的一系列同分异构体B1,B2,B3,B4在本体状态下组装有很大差异。B3分子为液体,而B1分子常温下为层状结构,B2,B4在本体状态中均自组装成倾斜柱状结构。
[Abstract]:In bulk and solution, amphiphilic steel bar-coil molecules have a strong ability to self-assemble into various supramolecular aggregates. In this paper, we have synthesized a series of rod-coil molecules with trianiline and triphenyl as the center of the steel rod and poly (ethylene oxide) (PEO) as the flexible coils. The target molecular structure was characterized by nuclear magnetic resonance (1HNMR) and flight mass spectrometry (MALDI-TOF-MS). In addition, the self-assembly behavior of these target molecules in bulk and in solution has been studied by means of (XRD), circular dichroism (CD), field emission transmission electron microscope (TEM) and atomic force microscope (AFM) by differential scanning calorimetry (DSC) (DSC), X-ray scattering experiment. The results show that the propeller-type amphiphilic molecule A _ (1) A _ (2) A _ (3) A _ (4) with different lengths of (PEO) chain at the core of trianiline is self-assembled into a tilted columnar structure in the bulk state. In aqueous solution, A _ (2) A _ (3) A _ (4) was first self-assembled into a nano-ring structure. Interestingly, however, the self-assembly morphology of the series changed over time. The structure of nanospheres and nanofibers were formed by self-assembly. Molecular A1 self-assembled into micelle structure, finally formed nanoflake structure, A2 self-assembled nano-band structure, A3 self-assembled into nano-flake structure, A4 self-assembly formed stable spiral interlaced filament structure. By means of CD and AFM,TEM experiments, it was found that the assembly formed by the self-assembly of the molecule A _ 3A _ 4 had some helical properties. However, a series of isomers B _ 1H _ 2B _ 2H _ 3B _ 4 synthesized based on triphenyl have different composition in bulk state. B3 molecule is liquid, while B1 molecule is layered structure at room temperature, and B _ 2N _ B _ 4 is self-assembled into inclined columnar structure in bulk state.
【学位授予单位】：延边大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O631
本文编号：2276846
[Abstract]:In bulk and solution, amphiphilic steel bar-coil molecules have a strong ability to self-assemble into various supramolecular aggregates. In this paper, we have synthesized a series of rod-coil molecules with trianiline and triphenyl as the center of the steel rod and poly (ethylene oxide) (PEO) as the flexible coils. The target molecular structure was characterized by nuclear magnetic resonance (1HNMR) and flight mass spectrometry (MALDI-TOF-MS). In addition, the self-assembly behavior of these target molecules in bulk and in solution has been studied by means of (XRD), circular dichroism (CD), field emission transmission electron microscope (TEM) and atomic force microscope (AFM) by differential scanning calorimetry (DSC) (DSC), X-ray scattering experiment. The results show that the propeller-type amphiphilic molecule A _ (1) A _ (2) A _ (3) A _ (4) with different lengths of (PEO) chain at the core of trianiline is self-assembled into a tilted columnar structure in the bulk state. In aqueous solution, A _ (2) A _ (3) A _ (4) was first self-assembled into a nano-ring structure. Interestingly, however, the self-assembly morphology of the series changed over time. The structure of nanospheres and nanofibers were formed by self-assembly. Molecular A1 self-assembled into micelle structure, finally formed nanoflake structure, A2 self-assembled nano-band structure, A3 self-assembled into nano-flake structure, A4 self-assembly formed stable spiral interlaced filament structure. By means of CD and AFM,TEM experiments, it was found that the assembly formed by the self-assembly of the molecule A _ 3A _ 4 had some helical properties. However, a series of isomers B _ 1H _ 2B _ 2H _ 3B _ 4 synthesized based on triphenyl have different composition in bulk state. B3 molecule is liquid, while B1 molecule is layered structure at room temperature, and B _ 2N _ B _ 4 is self-assembled into inclined columnar structure in bulk state.
【学位授予单位】：延边大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O631
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