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【答案】应助回帖
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爱与雨下: 2014-10-16 20:15:09
savegirls: 金币+15, 翻译EPI+1, ★★★很有帮助 2014-10-17 23:06:56
Pressure is one of the most common natural external stimuli, and thus piezochromic materials, which show color changes resulting from external pressure or mechanical grinding, can be used as pressure-sensing and
optical-recording systems. However, whereas pH-, light-, and temperature-sensitive materials are relatively well understood, studies of piezochromic materials remain inadequate owing to the absence of an effective mechanism to explain the relationship between changes in molecular assembly or packing and the corresponding luminescence properties of the material. Until now, successful systems have generally made use of transformations between monomeric and dimeric/excimeric states through hydrogen-bonding interactions as the mechanism to cause changes in luminescence.
压强是自然界最常见的一种外界作用，其在压致变色材料中也很普遍，当材料受外力作用或进行机加工时其颜色会发生变化。我们对pH值、光及温度敏感材料已有充分的了解，而对压致变色材料的研究还存在不足，其原因是没有能合理解释分子聚集状态的改变与其对材料发光性能间关系的机制。至今，已有一些体系以单分子态与通过氢键连接的多分子态间的相互转换作为引起发光性能改变的机制，并成功解释了上述关系。 |
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