首页> 外文学位 >Controlling Interlocked Molecular Machines Through Coordination Chemistry.
【24h】

Controlling Interlocked Molecular Machines Through Coordination Chemistry.

机译:通过配位化学控制联锁分子机器。

获取原文
获取原文并翻译 | 示例

摘要

This thesis presents the design, synthesis and characterization of the [2]pseudorotaxanes and [2]rotaxanes for the purpose of designing a range of new interlocked molecular machines utilizing a 2,2':6'2"-terpyridine based thread and 24-crown-8 macrocycle as beads. Chapter 1 introduces the concepts of interpenetrated and interlocked compounds like pseudorotaxanes, rotaxanes, catenanes and also defines the molecular machines with representative examples of existing systems found throughout the literature.;Chapter 3 presents a designing of another metal coordination controlled molecular machine named a mechanical "flip-switch" using an unsymmetrical thread and unsymmetrical crown ether. The chapter provides the evidence that an unsymmetrical [2]rotaxane can exist in two distinct co-conformations and the relative ratio of these two co-conformations can be controlled by changing the coordination environment. Room temperature NMR method is established for the analysis. The resulting interpenetrated molecules were characterized by 1H NMR spectroscopy.;Chapter 4 describes the introduction of strong electrostatic ion-ion interactions to a coordination controlled "flip-switch". This chapter provides the evidence that adding sulfonate group to the crown ether can significantly increase the Ka of the [2]pseudorotaxane, formed using positively charged 2,2':6'2"-terpyridine based thread and a negatively charged 24-crown-8ether beads containing one sulfonate (SO3 -) functionalities. [2] rotaxane with long chain ester groups was synthesized by modifying the bulky "stopper" groups. The bulky diester end groups were substituted with alkyl chains with six units in order to increase the solubility of rotaxanes in non-polar solvents. 1H NMR spectroscopic studies were performed in a variety of solvents of different polarity.;Chapter 2 presents a designing of metal coordination controlled molecular switch in which a chelating group has been incoorporated into the cationic dipyridyl ethane thread. In this chapter, pseudorotaxanes containing a tridentate terpyridine (terpy) group are designed in order to prove that the threading and unthreading of [2]pseudorotaxanes can be manipulated by controlling the coordination geometry of the terpy group attached to the thread. The association constants (Ka) for [2]pseudorotaxane formation between the square planar complexes were compared with the octahedral complexes.
机译:本论文介绍了[2]假轮烷和[2]轮烷的设计,合成和表征,目的是设计一系列新的基于2,2':6'2“-三联吡啶的联锁分子机器和24- Crown-8大环作为小珠。第1章介绍互穿互锁的化合物的概念,如假轮烷,轮烷,链烷,并定义了分子机器,并提供了整个文献中现有系统的代表性实例;第3章介绍了另一种金属配位的设计本章提供了一个证据,证明不对称的[2]轮烷可以以两种不同的共构象存在,并且这两种共构象的相对比率也存在。可以通过改变配位环境来控制,建立了室温核磁共振方法进行分析。通过1H NMR光谱表征了所评估的分子。;第4章描述了将强静电离子-离子相互作用引入到配位控制的“触发器”中。本章提供的证据表明,在冠醚中添加磺酸盐基团可以显着提高[2]假轮烷的Ka,该假正烷是由带正电荷的2,2':6'2“-吡啶基线程和带负电荷的24冠8个带有一个磺酸盐(SO3--)官能团的醚珠。[2]长链酯基的轮烷通过修饰庞大的“塞子”基团而合成;庞大的二酯端基被六个单元的烷基链取代,以提高溶解度在不同极性的各种溶剂中进行了1H NMR光谱研究;第2章提出了一种金属配位控制分子开关的设计,其中一种螯合基团已经渗入阳离子二吡啶基乙烷线中。在本章中,设计了含有三齿三联吡啶(terpy)基团的假轮烷,以证明[2]假轮烷的穿线和脱线可以是通过控制连接到螺纹的三联基的配合几何形状进行操作。将正方形平面络合物之间[2]假轮烷的形成的缔合常数(Ka)与八面体络合物进行了比较。

著录项

  • 作者

    Sharma, Sapna.;

  • 作者单位

    University of Windsor (Canada).;

  • 授予单位 University of Windsor (Canada).;
  • 学科 Inorganic chemistry.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 247 p.
  • 总页数 247
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号