Thermoplastic Fluorescent Conjugated Polymers: Benefits of Preventing π-π Stacking
Thermoplastic Fluorescent Conjugated Polymers: Benefits of Preventing π-π Stacking
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DOI：
10.1002/anie.201305728
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发表时间：
2013-10-04
影响因子：
16.6
通讯作者：
Takeuchi, Masayuki
中科院分区：
文献类型：
--
作者：
Pan, Chengjun;Sugiyasu, Kazunori;Takeuchi, Masayuki
以凝聚态发射彩色荧光的有机材料，如固体（晶体、薄膜或玻璃）、[1-5]液晶、[6]和液体[7]，可用于从有机发光二极管、波长可调激光器到超灵敏传感器的各种应用。然而，在这些极浓的条件下，涉及能量迁移/转移、电荷分离、自吸收和准分子形成的光物理过程相当复杂，这往往导致低荧光量子产率（FF）因此，合理的分子设计是必不可少的，并且不可避免地，需要考虑控制这些非辐射衰变过程的凝聚相中的分子间相互作用。在有机荧光材料中，π共轭聚合物（CPs）以其独特的力学性能、可加工性和导电性在有机光电领域具有广泛的应用前景。事实上，CPs已经成为有机光电子学领域的关键材料分离π共轭主链和抑制聚合物间相互作用是获得固态发光CPs的有效策略。[3 - 5]例如，Swager等人[3]创造了多种具有刚性保护框架（如三甲烯）的高辐射CPs， Anderson及其同事[3]开发了聚轮烷型CPs，即被许多环糊精包裹的CPs。除了这些开创性的研究，一些所谓的绝缘分子
Organic materials that emit colorful fluorescence in condensed phases such as solids (crystals, thin films, or glasses),[1–5] liquid crystals,[6] and liquids [7] are useful for various applications ranging from organic light-emitting diodes and wavelength-tunable lasers to ultrasensitive sensors. Under these extremely concentrated conditions, however, photophysical processes are rather complex involving energy migration/transfer, charge separation, self-absorption, and excimer formation, which often give rise to low fluorescence quantum yields (FF).[8] Therefore, rational molecular designs are essential, and inevitably, the intermolecular interactions in the condensed phases that govern these nonradiative decay processes need to be taken into consideration.Among fluorescent organic materials, π-conjugated polymers (CPs) are attractive for organic optoelectronic applications owing to their distinguishing mechanical properties, processability, and electronic conductivity. In fact, CPs have been key materials in the field of organic optoelectronics.[9] An effective strategy for attaining solid-state emissive CPs is to isolate the π-conjugated backbone and inhibit interpolymer interactions.[3–5] For example, Swager et al.[3] have created a variety of highly emissive CPs that have rigid protecting frameworks such as triptycenes, and Anderson and co-workers [4] have exploited polyrotaxane-type CPs, that is, CPs that are sheathed by many cyclodextrins. In addition to these pioneering researches, some so-called insulated molecular