Spiropyran-based multi-colored switching tuned by pressure and mechanical grinding
Spiropyran-based multi-colored switching tuned by pressure and mechanical grinding
复制标题
通过压力和机械研磨调节基于螺吡喃的多色切换
DOI：
10.1039/c6tc02578a
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发表时间：
2016-01-01
影响因子：
6.4
通讯作者：
Ma, Yuguo
中科院分区：
文献类型：
--
作者：
Meng, Xiao;Qi, Guangyu;Ma, Yuguo
基于螺吡喃和芘的衍生物合成了一种新型多色机械致变色材料。无论是在各向同性压缩或各向异性研磨下的力致变色行为是通过超分子和化学结构的变化相结合来实现的。通过利用金刚石砧室技术实现的高压诱导了连续的机械变色过程，涉及从蓝色到红色的颜色变化，而三色切换可以通过样品粉末的顺序轻或重研磨来实现。力致变色行为可以通过控制机械载荷的方式和强度来调节。这种分子展示了一种新的简单的策略，用于设计多色开关分子和基于超分子变化和分子结构变化的压力下的机械致色性控制。它在压力传感器、压力校准、机械探针和防伪油墨等方面具有很大的应用潜力。
The novel multi-colored switching mechanochromic materials were obtained based on a spiropyran and pyrene derivative. The mechanochromic behaviors under either isotropic compression or anisotropic grinding were realized through a combination of supramolecular and chemical structural changes. The high pressure achieved by utilizing the Diamond Anvil Cell technique induced a continuous mechanochromic process involving a color change from blue to red, while the tricolored switching could be achieved by sequential light or heavy grinding of the sample powder. The mechanochromic behaviors could be adjusted via the control of the modes and strength of the mechanical loadings. This molecule showcases a novel straightforward strategy for the design of multi-colored switching molecules and the control of mechanochromism under pressure based on both supramolecular changes and molecular structural changes. It shows great potential for applications in pressure sensors, pressure calibration, mechanoprobes and security inks.