Intrinsic persistent room temperature phosphorescence derived from 1H-benzo[f]indole itself as a guest
Intrinsic persistent room temperature phosphorescence derived from 1H-benzo[f]indole itself as a guest
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源自 1H-苯并[f]吲哚本身作为客体的固有持久室温磷光
DOI：
10.1016/j.cclet.2022.107882
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发表时间：
2022-10
影响因子：
9.1
通讯作者：
Zhiyong Yang（杨志涌）
中科院分区：
文献类型：
--
作者：
Danman Guo;Yuyuan Wang;Jinzheng Chen;Yifeng Cao;Yiling Miao;Huahua Huang;Zhenguo Chi;Zhiyong Yang（杨志涌）
1H-苯并[f]吲哚（Bd）及其衍生物对咔唑（Cz）类化合物室温磷光（RTP）的影响引起了人们的广泛关注。然而，Bd本身存在于Cz基或其他掺杂体系中的作用仍不清楚。为了阐明其固有的磷光性质，将Bd作为客体引入到不同的有机基质中，包括取代的Cz衍生物和聚合物。在560-620 nm范围内的磷光被证实是来自Bd本身，无论Bd掺杂在Cz衍生物的晶体或非晶态中，都可以检测到Bd。Cz衍生物与Bd之间合适的能隙是实现Bd超长RTP的关键。此外，当掺杂到具有大量氢键的聚合物中时，很容易获得寿命超过280 ms的Bd的RTP。其中，Bd@PHEMA（聚甲基丙烯酸羟乙酯）具有较好的上级磷光性能，黄色余辉时间超过2.5 s。因此，本研究发现了一种新的有机RTP荧光体Bd，并且不仅可以将Bd掺杂到Cz衍生物中，还可以将其掺杂到聚合物中作为主体，实现Bd的超长RTP。
The influence of 1H-benzo[f]indole (Bd) and its derivatives on room temperature phosphorescence (RTP) has raised great concern since they were found to significantly affect RTP of the extensively studied carbazole (Cz) derivatives. However, the role of Bd itself existing in Cz-based or other doping systems was still unclear. In order to clarify its intrinsic phosphorescent property, Bd was introduced as a guest into different organic matrixes including substituted Cz derivatives and polymers. The phosphorescence located in 560–620 nm was confirmed to be derived from Bd itself, which can be detected whatever Bd was doped in the crystal or amorphous state of Cz derivatives. The suitable energy gap between Cz derivatives and Bd is the key to achieve ultralong RTP of Bd. Additionally, when doped in polymers with plenty of hydrogen bonds, RTP of Bd with lifetime over 280 ms was easily obtained. Among them, Bd@PHEMA (poly(hydroxyethyl methacrylate) exhibited superior phosphorescence, with yellow afterglow lasting for over 2.5 s. Therefore, this work demonstrated that a new organic RTP phosphor, Bd, is discovered, and ultralong RTP of Bd can be achieved not only doped in Cz derivatives but also in polymers as the hosts.
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