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糖太甜521

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As for mechanochromic (MC) properties, meaning that the emission can be reversibly transformed through altering of molecular packing structures upon grinding, shearing or  pressing, one of the recent goals for practical applications is improving the contrast ratio in emission intensity or wave- length. Several fluorescent on–off switching materials with high contrast have been reported.However examples with a broad colour change are rather scarce at the current stage8due to the complicated requirements of both remarkable shift of PL wavelength and high solid-state emission efficiency. Tian's group obtained divinylanthracene derivatives showing more than 100 nm red-shift under high pressure, for example, above one GPa,9but relatively low pressure is preferred for applica-tions in our daily life.
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爱与雨下: 金币+1 2014-10-11 07:49:33
糖太甜521: 金币+7, 翻译EPI+1, ★★★★★最佳答案 2014-10-11 21:51:56
至于机械性变色(MC)的属性,是指通过研磨,剪切或挤压而改变分子堆积结构进而可逆性的转换其发光。最近实际应用的目标之一是改善发光的对比度或波长。已经报道了几种具有高对比度的荧光通断切换材料。但在目前阶段,具有光谱颜色变化的例子还相当稀少,因为对PL波长和高固态发光效率的的要求都很复杂。Tian的小组得到的二乙烯基蒽衍生物在高压(如大于1GPa)下红移超过100nm,但是对我们日常生活中的应用,优先相对低压。
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