Repairable photoactive polymer systems via metal-terpyridine-based self-assemblyElectronic supplementary information (ESI) available. See DOI: 10.1039/c7py00095b

• Main Authors: Jeong, Dong-Cheol, Lee, Jookyeong, Ro, Yu Hyeon, Song, Changsik
• Format: Journal Article
• Language: English
• Published: 21.03.2017
• ISSN: 1759-9954; 1759-9962
• DOI: 10.1039/c7py00095b

The development of sustainable polymeric photo-catalytic systems for the conversion of solar energy is an important issue. In this perspective, efficient photo-catalytic systems have been developed by many research groups; however, their long-term stability or sustainability is still challenging and need to be resolved. In order to realize sustainable polymeric photoactive systems, we developed terpyridine (tpy)-based polymers and their ruthenium complexes, which were reversibly assembled and disassembled through metal ion-ligand interactions. In the presence of metal ions, Ru-based photoactive polymers were assembled on tpy-coated ITO substrates, generating visible-light induced photocurrents. Subsequently, when disassembled by the introduction of tetra- n -butylammonium fluoride, the assembled polymeric complex decomposed, decreasing the photocurrent. However, the photocurrent efficiency of this system was recovered through re-assembly and repeated several times without a significant decrease in its efficiency. In addition, a sustainable photo-catalyst system was achieved by photo-oxidative coupling with benzylamine. The initial active photo-catalytic system became inactive after disassembly; however, its activity was restored through assembly again, and this process was repeated successfully several times. The self-assembly via reversible metal ion-ligand interaction would enable photo-catalytic systems to be self-repairable and sustainable. The photocatalytic activity of polymeric systems ceased upon disassembly and was restored upon assembly through metal ion-ligand interaction.