Shao Yayu, He Xianglong, Xin Yangyang, Zhang Yuewei, Zhang Dongdong, Duan Lian, Zou Yingquan
College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China.
Laboratory of Flexible Electronics Technology, Tsinghua University, Beijing 100084, People's Republic of China.
ACS Appl Mater Interfaces. 2024 Jun 12;16(23):30344-30354. doi: 10.1021/acsami.4c02834. Epub 2024 May 31.
The primary focus of photopolymerization research is to advance highly efficient visible photoinitiating systems (PISs) as alternatives to conventional ultraviolet (UV) photoinitiators. We developed four multiresonance emitters (BIC-pCz, BNO1, BO-DICz, and TPABO-DICz) to sensitize iodonium salt (Iod) and initiate free-radical and cationic photopolymerization under visible light for the first time. The TPABO-DICz/Iod system achieved a double-bond conversion of over 70% within just 4 s of exposure to green light (520 nm), while the BNO1/Iod system achieved a double-bond conversion exceeding 50% with 10 s of exposure to red light (630 nm). The photochemical properties were studied through thermodynamic research, steady-state photolysis, and electron spin resonance. Photolithography techniques were employed to fabricate photoluminescent films and micrometer-scale patterns utilizing the blue-emitting BIC-pCz dye, showcasing the potential of photolithography in the production of photoluminescent pixels. Additionally, the BIC-pCz/Iod and TPABO-DICz/Iod systems have been employed to rapidly fabricate photoluminescent polymer patterns using a digital-light-processing 3D printer with a low-intensity light (3.2 mW cm). These multiresonance emitters show exceptional photosensitizing effects and can act as fluorescent dyes in photoluminescent patterns, highlighting the potential of utilizing photopolymerization for OLED applications.
光聚合研究的主要重点是开发高效的可见光光引发体系（PISs），以替代传统的紫外（UV）光引发剂。我们首次开发了四种多共振发射体（BIC-pCz、BNO1、BO-DICz和TPABO-DICz），用于敏化碘鎓盐（Iod）并在可见光下引发自由基和阳离子光聚合。TPABO-DICz/Iod体系在绿光（520 nm）照射仅4 s内就实现了超过70%的双键转化率，而BNO1/Iod体系在红光（630 nm）照射10 s时双键转化率超过50%。通过热力学研究、稳态光解和电子自旋共振对光化学性质进行了研究。利用发射蓝光的BIC-pCz染料，采用光刻技术制备了光致发光薄膜和微米级图案，展示了光刻在光致发光像素生产中的潜力。此外，BIC-pCz/Iod和TPABO-DICz/Iod体系已被用于使用低强度光（3.2 mW cm）的数字光处理3D打印机快速制备光致发光聚合物图案。这些多共振发射体表现出优异的光敏化效果，并且可以在光致发光图案中充当荧光染料，突出了利用光聚合用于有机发光二极管应用的潜力。
