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Aggregation-Induced Emission and White Luminescence from a Combination of π-Conjugated Donor–Acceptor Organic Luminogens
ACS Omega ( IF 3.7 ) Pub Date : 2018-10-22 00:00:00 , DOI: 10.1021/acsomega.8b01706 Paramita Das 1, 2 , Atul Kumar 1 , Aniket Chowdhury 1 , Partha Sarathi Mukherjee 1
ACS Omega ( IF 3.7 ) Pub Date : 2018-10-22 00:00:00 , DOI: 10.1021/acsomega.8b01706 Paramita Das 1, 2 , Atul Kumar 1 , Aniket Chowdhury 1 , Partha Sarathi Mukherjee 1
Affiliation
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Two new star-shaped phenyl- and triazine-core based donor–acceptor (D–A) type conjugated molecules bearing triphenylamine end-capped arms were synthesized and characterized as imminent organic optoelectronic materials. Photophysical properties of the compounds were explored systematically via spectroscopic and theoretical methods. Because of the presence of donor–acceptor interactions, these luminogens display multifunctional properties, for instance, high extinction coefficient, large stokes shift, and pronounced solvatochromic effect. The compounds also exhibited phenomenon known as aggregation-induced emission on formation of nano-aggregates in the tetrahydrofuran–water mixture. The aggregate formation was confirmed by transmission electron microscopy, scanning electron microscopy, and dynamic light scattering analyses. Moreover, by controlling the electron withdrawing ability of the acceptor, complementary emissive fluorophores (blue and yellow) were achieved. These two complementary colors together span the entire range of visible spectrum (400–800 nm) and therefore when mixed in a requisite proportion generate white light in solution phase. These findings have potential for the progress of new organic white light radiating materials for applications in lighting and display devices.
中文翻译：
π结合的供体-受体有机发光剂的结合引起的发射和白色发光。
合成了两个新的星形苯基和三嗪核基供体-受体（DA）型共轭分子，它们带有三苯胺封端的臂，并被表征为迫在眉睫的有机光电材料。通过光谱和理论方法系统地研究了化合物的光物理性质。由于存在供体-受体相互作用，这些发光剂显示出多种功能，例如，高消光系数，大斯托克斯位移和显着的溶剂变色效应。这些化合物还表现出在四氢呋喃-水混合物中形成纳米聚集体时被称为聚集诱导发射的现象。通过透射电子显微镜，扫描电子显微镜和动态光散射分析来确认聚集体的形成。而且，通过控制受体的电子吸收能力，获得了互补的发射荧光团（蓝色和黄色）。这两种互补色一起涵盖了可见光谱的整个范围（400–800 nm），因此，当以必要的比例混合时，在溶液相中会产生白光。这些发现对于用于照明和显示设备的新型有机白光辐射材料具有发展潜力。
更新日期：2018-10-22
中文翻译：
π结合的供体-受体有机发光剂的结合引起的发射和白色发光。
合成了两个新的星形苯基和三嗪核基供体-受体（DA）型共轭分子，它们带有三苯胺封端的臂，并被表征为迫在眉睫的有机光电材料。通过光谱和理论方法系统地研究了化合物的光物理性质。由于存在供体-受体相互作用，这些发光剂显示出多种功能，例如，高消光系数，大斯托克斯位移和显着的溶剂变色效应。这些化合物还表现出在四氢呋喃-水混合物中形成纳米聚集体时被称为聚集诱导发射的现象。通过透射电子显微镜，扫描电子显微镜和动态光散射分析来确认聚集体的形成。而且，通过控制受体的电子吸收能力，获得了互补的发射荧光团（蓝色和黄色）。这两种互补色一起涵盖了可见光谱的整个范围（400–800 nm），因此，当以必要的比例混合时，在溶液相中会产生白光。这些发现对于用于照明和显示设备的新型有机白光辐射材料具有发展潜力。
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