Zhao Ming, Liu Cheng, Shan Zhihao, Ji Changqing, Lu Xiaozhong, Lv Guanglei
College of New Materials Science and Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing, China.
Institute of Environmental Protection Disposal Technology of Polymer Materials, Beijing Institute of Petrochemical Technology, Beijing, China.
Front Chem. 2022 May 9;10:890545. doi: 10.3389/fchem.2022.890545. eCollection 2022.
Singlet oxygen (O) is a common reactive oxygen species that has found wide application in wastewater processing, photochemical synthesis, and photodynamic therapy. In this paper, a dual-core metal [a Re(I)-based component and a Gd(III)-based component] photosensitizer was synthesized and doped into polymer fibrous films for O generation. Here the Re(I)-based component is responsible for the photosensitizing reaction which directly transformed O to O, while the Gd(III)-based component served as an auxiliary part that assisted the transformation from O to O synergistic effect by its triplet excited ligands. The photophysical parameters of this photosensitizer (denoted as Re-Gd) and its fibrous films (denoted as Re-Gd@PVP) were carefully recorded, discussed, and compared. It was found that the excited state lifetime and photostability of Re-Gd were both improved after being doped into fibrous films, favoring O generation. The O generation performance comparison between Re-Gd in the solid state, in solution, and fibrous films suggested that O generation performance was indeed improved by the electrospinning films. In addition, the positive factor of synergistic effect on improving O-producing efficiency was confirmed by comparing Re-Gd@PVP films with reference films with a single-core metal photosensitizer having no synergistic effect.
单线态氧（O）是一种常见的活性氧物种，在废水处理、光化学合成和光动力疗法中有着广泛应用。本文合成了一种双核金属（基于铼（I）的组分和基于钆（III）的组分）光敏剂，并将其掺杂到聚合物纤维膜中用于产生O。在此，基于铼（I）的组分负责光敏反应，该反应直接将O转化为O，而基于钆（III）的组分作为辅助部分，通过其三线态激发配体协同促进从O到O的转化。仔细记录、讨论并比较了这种光敏剂（记为Re-Gd）及其纤维膜（记为Re-Gd@PVP）的光物理参数。研究发现，掺杂到纤维膜后，Re-Gd的激发态寿命和光稳定性均得到改善，有利于O的产生。对固态、溶液态和纤维膜态的Re-Gd的O产生性能进行比较表明，静电纺丝膜确实提高了O产生性能。此外，通过将Re-Gd@PVP膜与没有协同效应的单核金属光敏剂的参比膜进行比较，证实了协同效应在提高O产生效率方面的积极作用。
