Polymorphs of a diarylethene that exhibits strong emission and direct visualization of polymorphic phase transition process by fluorescence color change
Polymorphs of a diarylethene that exhibits strong emission and direct visualization of polymorphic phase transition process by fluorescence color change
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二芳基乙烯的多晶型物具有强发射性，并通过荧光颜色变化直接可视化多晶型相变过程
DOI：
10.1016/j.dyepig.2016.12.006
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发表时间：
2017
影响因子：
4.5
通讯作者：
Seiya Kobatake
中科院分区：
文献类型：
--
作者：
Daichi Kitagawa;Tatsumoto Nakahama;Katsuya Mutoh;Yoichi Kobayashi;Jiro Abe;Hikaru Sotome;Syoji Ito;Hiroshi Miyasaka;Seiya Kobatake
高荧光量子产率的发光固体材料在有机光电子学中的应用引起了人们的极大关注。在光致变色二芳基乙烯晶体的研究过程中，我们发现从丙酮和正己烷溶液中重结晶得到了两种晶型的二芳基乙烯。令人惊讶的是，这两种多晶型晶体都表现出很强的发射，其荧光量子产率(>；0.5)远远高于正己烷溶液(0.017)。此外，还发现了热力学固态多态相变，并通过荧光变色直观地显示了这一过程。
Luminescent solid-state materials with high fluorescence quantum yield have attracted much attention in application to organic optoelectronics. In the course of study of photochromic diarylethene crystals, we found that two polymorphic forms of a diarylethene are obtained by recrystallization from acetone andn-hexane solutions. Surprisingly, both polymorphic crystals exhibited strong emission whose fluorescence quantum yield (>0.5) is much higher than that inn-hexane solution (0.017). Furthermore, the thermodynamic solid-state polymorphic phase transition was found and the process was directly visualized by a fluorescence color change.