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【答案】應(yīng)助回帖
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愛與雨下: 2014-10-16 20:15:09
savegirls: 金幣+15, 翻譯EPI+1, ★★★很有幫助 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.
壓強是自然界最常見的一種外界作用，其在壓致變色材料中也很普遍，當(dāng)材料受外力作用或進行機加工時其顏色會發(fā)生變化。我們對pH值、光及溫度敏感材料已有充分的了解，而對壓致變色材料的研究還存在不足，其原因是沒有能合理解釋分子聚集狀態(tài)的改變與其對材料發(fā)光性能間關(guān)系的機制。至今，已有一些體系以單分子態(tài)與通過氫鍵連接的多分子態(tài)間的相互轉(zhuǎn)換作為引起發(fā)光性能改變的機制，并成功解釋了上述關(guān)系。 |
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