苯并【1,3】噁嗪类分子及其衍生物在高压条件下的开关行为研究

Since high pressure is ubiquitous in universe, it’s of great importance to investigate the physical and chemical properties of materials under high pressure. Molecular switches are a class of functional molecules that can tautomerize under external stimuli accompanied with changes of their physical and chemical properties, which have applications in a broad range of fields, such as data storage and sensing. However, the investigation on molecular switches has been still largely limited to solution behaviors with the stimuli of light and heat so far. High pressure is effective in increasing the intermolecular interactions and changing the molecular micro-environments. By applying pressure on molecular switches, it will help understand how micro-environments affect their switching behaviors in condensed state and help understand how living creatures adapt to high pressure environments. In this proposal, a series of benzo[1, 3]oxazines and their derivatives are selected as the objects, and the structure-property relationship will be investigated in solution first, and then their switching behaviors will be studied under high pressure with different materials (solvents, polymer and molecular crystals) as pressure-transmission media to investigate how the pressure strength, adaption ability of the pressure-transmission media, and the molecular structure affect their switching performances together, and finally, the application potentials of these molecular switches in pressure sensing will be explored.

高压在宇宙中是一种非常普遍的现象，研究材料在高压条件下的物理化学性质有重要意义。分子开关是在外界刺激下能够可逆互变异构，并伴随物理化学性质变化的一类功能分子，在信息存储、传感检测等领域有着广泛的应用。然而，目前人们对分子开关异构化的研究还主要局限在溶液中用光、热等手段调控等。高压是一种增加分子间相互作用、改变分子所处微环境的有效措施，研究高压下分子开关的性能，有利于深入理解聚集态下，分子所处微环境对其互变异构的影响，继而帮助理解生物体对高压的适应能力。本项目拟以一系列苯并【1,3】噁嗪类分子开关及其衍生物为研究对象，首先系统地研究分子开关的结构与性能之间的关系，然后在静水压下定量研究不同高压介质如溶剂、聚合物、分子晶体对分子开关性能的影响，深入的探讨高压强度、分子周围介质的压力适应能力、分子的结构基础与分子开关在高压下的开关性能之间的内在联系，最后探索分子开关在压力传感等领域的应用。

高压在宇宙中是一种非常普遍的现象，研究材料在高压条件下的物理化学性质有重要意义。分子开关是在外界刺激下能够可逆互变异构，并伴随物理化学性质变化的一类功能分子，在信息存储、传感检测等领域有着广泛的应用。然而，目前人们对分子开关异构化的研究还主要局限在溶液中用光、热等手段调控等。高压是一种增加分子间相互作用、改变分子所处微环境的有效措施，研究高压下分子开关的性能，有利于深入理解聚集态下，分子所处微环境对其互变异构的影响，继而帮助理解生物体对高压的适应能力。本项目以苯【1,3】噁嗪类分子开关等分子作为研究对象，并通过文献调研，系统地研究和分析了分子开关的结构与性能之间的关系，探讨了高压强度与分子的结构在高压状态与分子开关性能之间的内在联系，最后探索分子开关在压力传感等领域的应用。