Li Zhiwei, Zhang Xingyuan
CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
Polymers (Basel). 2020 Apr 2;12(4):790. doi: 10.3390/polym12040790.
Two types of naphthalimide derivatives were synthesized by introducing a carbazole group and an n-butyl, respectively, into the naphthalimide system. The electron-donating ability of two kinds of derivatives was investigated by the electrochemical method. These two types of derivatives were used as initiators for the polymerization of d and l-lactide polymerization. Here, the emission and UV-vis absorption serve as the main focus. Compared with solely donor-initiated polylactide (PLA), the PLA with a donor-acceptor structure has a more efficient phosphorescence emission, of which the longest phosphorescence lifetime is up to 407 ms. The experimental results reveal the existence of charge-transfer states in the donor-acceptor-ended polymer. Due to the role of charge-transfer states, a red phosphorescent polymer was developed. Theoretically, these desirable advantages render synthesized PLAs a potential candidate for bioimaging and anti-counterfeiting.
通过分别将咔唑基团和正丁基引入萘二甲酰亚胺体系，合成了两种类型的萘二甲酰亚胺衍生物。采用电化学方法研究了这两种衍生物的给电子能力。将这两种类型的衍生物用作d和l-丙交酯聚合的引发剂。在此，发射和紫外-可见吸收作为主要研究重点。与仅由供体引发的聚丙交酯（PLA）相比，具有供体-受体结构的PLA具有更高效的磷光发射，其最长磷光寿命可达407毫秒。实验结果揭示了供体-受体端聚合物中电荷转移态的存在。由于电荷转移态的作用，开发出了一种红色磷光聚合物。从理论上讲，这些理想的优点使合成的PLA成为生物成像和防伪的潜在候选材料。
