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Uncommon Aggregation‐Induced Emission Molecular Materials with Highly Planar Conformations
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-02-27 , DOI: 10.1002/adom.201701394
Lei Yang 1 , Pan Ye 1 , Wenqiang Li 2 , Weijie Zhang 3 , Qian Guan 1 , Chen Ye 1 , Tao Dong 1 , Xiaoxi Wu 1 , Weijun Zhao 3 , Xinggui Gu 3 , Qian Peng 4 , Benzhong Tang 3 , Hui Huang 1
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Numerous luminogenic molecules with twist/rotor structures have showed pronounced aggregation‐induced emission (AIE) effect, while planar conjugated molecules usually exhibit aggregation‐caused quenching (ACQ) characteristics. However, development of emissive organic molecules with planar conformations is beneficial to achieving nanomaterials with high photostability for biological applications. Herein, six analogous planar molecules that show completely contrast emission behavior. 1,2‐Di(2‐thienyl)‐ethene, 1,2‐di(2‐selenophenyl)‐ethene, and (E)‐1,2‐bis(thieno[3,2‐b]thiophen‐2‐yl)ethene molecules show common ACQ effect, while the planar (E)‐1,2‐diethyoxy‐1,2‐di(thiophen‐2‐yl)ethene (TVT(OEt)), (E)‐1,2‐diethyoxy‐1,2‐di(selenophen‐2‐yl)ethene (SVS(OEt)), and (E)‐1,2‐diethyoxy‐1,2‐di(thieno[3,2‐b]thiophen‐2‐yl)ethene (TTVTT(OEt)) molecules are highly emissive in the solid state, exhibiting interesting AIE behavior. The experimental and theoretical results demonstrate that the photoisomerization is responsible for the unusual AIE activity of TVT(OEt), SVS(OEt), and TTVTT(OEt). Furthermore, the AIE TTVTT(OEt)‐based nanomaterials exhibit specific imaging of lipid droplets with excellent photostability. The ease with this strategy paves a novel way for creating emissive molecular materials with planar conformations for biological and other applications.

中文翻译:

具有高度平面构象的不常见的聚集诱导发射分子材料

许多具有扭曲/转子结构的发光分子均表现出明显的聚集诱导发射(AIE)效应,而平面共轭分子通常表现出聚集引起的猝灭(ACQ)特性。然而,具有平面构象的发光有机分子的开发有利于获得具有高光稳定性的纳米材料用于生物应用。在本文中,显示出完全对比发射行为的六个类似的平面分子。1,2-二(2-噻吩基)乙烯,1,2-二(2-硒苯基)-乙烯和(E)1,2-双(噻吩并[3,2-b]噻吩-2-基)乙烯分子表现出常见的ACQ效应,而平面(E)-1,2-二乙氧基-1,2-二(噻吩-2-基)乙烯(TVT(OEt)),(E)-1,2-二乙氧基1,2-二(硒代苯-2-基)乙烯(SVS(OEt))和(E)1,2-二乙氧基-1,2-di(噻吩[3,2-b]噻吩-2-基)乙烯(TTVTT(OEt))分子在固态时具有高发射率,表现出有趣的AIE行为。实验和理论结果表明,光异构化是TVT(OEt),SVS(OEt)和TTVTT(OEt)异常AIE活性的原因。此外,基于AIE TTVTT(OEt)的纳米材料对脂滴具有特殊的成像性能,并具有出色的光稳定性。这种策略的简便性为生物和其他应用领域中产生具有平面构象的发光分子材料铺平了一条新颖的道路。基于AIE TTVTT(OEt)的纳米材料对脂滴具有特殊的成像性能,并具有出色的光稳定性。这种策略的简便性为生物和其他应用领域中产生具有平面构象的发光分子材料铺平了一条新颖的道路。基于AIE TTVTT(OEt)的纳米材料对脂滴具有特殊的成像性能,并具有出色的光稳定性。这种策略的简便性为生物和其他应用领域中产生具有平面构象的发光分子材料铺平了一条新颖的道路。
更新日期:2018-02-27
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