Macroscopic Change in Luminescent Color by Thermally Driven Sliding Motion in [3]Rotaxanes
Macroscopic Change in Luminescent Color by Thermally Driven Sliding Motion in [3]Rotaxanes
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DOI：
10.1002/chem.201905342
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发表时间：
2020-02-25
影响因子：
4.3
通讯作者：
Terao, Jun
中科院分区：
文献类型：
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作者：
Inamori, Daiki;Masai, Hiroshi;Terao, Jun
对轮烷结构的系统研究揭示了其宏观性质的热驱动转换的合理设计。在低温下，发光团被大环绝缘并显示单体发光，而在高温下，发光团由于大环位置分布的变化而暴露并与外部分子相互作用，从而产生具有高可逆性和响应性的热驱动发光颜色变化。通过适当调整轮烷内的大环-发光团相互作用以及激发的发光团与外络合物中外部分子之间的耦合，这种通过有效热滑动实现的宏观切换成为可能。通过简单和清洁的热刺激来改变性质的能力应该扩大轮烷作为热驱动分子体系成分的利用。
Systematic investigation of rotaxane structures has revealed a rational design for thermally driven switching of their macroscopic properties. At low temperature, the luminophore is insulated by the macrocycles and displays monomer emission, whereas at high temperature, the luminophore is exposed owing to a change in the macrocyclic location distribution and interacts with external molecules, affording a thermally driven luminescent color change with high reversibility and responsiveness. This macroscopic switching through efficient thermal sliding was made possible by appropriate tuning of both the macrocycle-luminophore interactions within the rotaxane and the coupling between the excited luminophore and external molecules in an exciplex. The ability to switch properties by a simple and clean thermal stimuli should expand the utilization of rotaxanes as components of thermally driven molecular systems.