The construction of a multicolored mechanochromic luminogen with high contrast through the combination of a large conjugation core and peripheral phenyl rings
The construction of a multicolored mechanochromic luminogen with high contrast through the combination of a large conjugation core and peripheral phenyl rings
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DOI：
10.1039/c6tc00972g
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发表时间：
2016-05
影响因子：
6.4
通讯作者：
Zhiju Zhao;Tai‐Yen Chen;Shuting Jiang;Zhengping Liu;D. Fang;Yongqiang Dong
中科院分区：
文献类型：
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作者：
Zhiju Zhao;Tai‐Yen Chen;Shuting Jiang;Zhengping Liu;D. Fang;Yongqiang Dong
通过大共轭核与外围苯环的结合，可以很容易地获得一种具有多色和高对比度发射的机械致色（MC）发光材料。发光原3表现为聚集诱导发光（AIE）和结晶增强发光（CEE）。3的发射可以在深蓝色（432 nm， ΦF = 42.2%），绿色（492 nm， ΦF = 59.3%）和橙色（584nm， ΦF = 0.4%）之间切换，通过加热，机械刺激和溶剂发烟的形态调整，在颜色和效率上都具有高对比度。3的多色和高对比度MC发射在光学记录中具有潜在的应用前景。单个发光体为3，在一张称重纸上形成绿色或深蓝色的发射背景，在两种背景上书写，可以得到弱橙色的发射字母。绿色背景上的字母在甲醇熏蒸后会变成深蓝色，而深蓝色背景上的字母在丙酮熏蒸后会变成绿色。所有的字母都可以通过研磨或160°C加热来擦除。
Through the combination of a large conjugation core and peripheral phenyl rings, one mechanochromic (MC) luminogen (3) with multicolored and high contrast emission is facilely obtained. Luminogen 3 shows aggregation-induced emission (AIE) and crystallization enhanced emission (CEE). The emission of 3 can be switched between deep blue (432 nm, ΦF = 42.2%), green (492 nm, ΦF = 59.3%), and orange (584 nm, ΦF = 0.4%) with high contrast in both color and efficiency through morphology tuning by heating, mechanical stimuli, and solvent fuming. The multicolored and high contrast MC emission of 3 affords its potential application in optical recording. A single luminogen of 3 can form a green or deep blue emissive background on a piece of weighing paper, and weak orange emissive letters could be obtained through writing on both backgrounds. Letters on the green background transfer to deep blue upon fuming with methanol, and those on the deep blue background transfer to green upon fuming with acetone. All the letters could be erased through grinding or heating at 160 °C.