Mechanically induced luminescence changes in molecular assemblies
Mechanically induced luminescence changes in molecular assemblies
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DOI：
10.1038/nchem.411
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发表时间：
2009-11-01
期刊：
影响因子：
21.8
通讯作者：
Kato, Takashi
中科院分区：
文献类型：
--
作者：
Sagara, Yoshimitsu;Kato, Takashi
通过热、光、压力、pH、电场或磁场等外部因素或引入客体分子来改变材料的形状和性质是一个有吸引力的前景。在这个角度来看，压致变色发光材料-改变其发光的颜色响应于机械刺激-被描述。这种压致变色现象已经被观察到的一些分子材料，包含在液晶和结晶固体状态的发光核心，以及与染料掺杂的聚合物材料。光致发光颜色的这些变化可以通过各种类型的机械压力来激活，例如剪切，研磨或拉伸，这可以触发产生颜色的不同机制。这种刺激响应材料具有各种应用的潜力，包括传感器，存储器和显示器。
Altering the shape and properties of a material through external factors such as heat, light, pressure, pH, electric or magnetic fields, or the introduction of a guest molecule, is an attractive prospect. In this Perspective, piezochromic luminescent materials - which change the colour of their luminescence in response to mechanical stimuli - are described. Such piezochromism has been observed for a few molecular materials that contain luminescent cores in liquid-crystalline and crystalline solid states, as well as for polymeric materials doped with dyes. These changes in photoluminescent colour can be activated by various types of mechanical pressure such as shearing, grinding or elongation, which can trigger different mechanisms of producing the colour. Such stimuli-responsive materials have potential for various applications, including sensors, memory and displays.