Highly Efficient Multiphoton Absorption of Zinc‐AIEgen Metal–Organic Frameworks. (10th February 2022) - Liu, Naifang
Abstract: A series of luminescent frameworks was synthesized from the selective combination of aggregation induced emission (AIE)‐linker tetra‐(4‐carboxylphenyl)ethylene (H4 TCPE) and Zn 2+ . Complex 1 was formed by the close packing of Zn‐TCPE hinge, and isostructural complexes 2 –5 were constructed by the linkage of Zn‐TCPE layer and pillar ligands. These complexes exhibit highly efficient multiphoton excited photoluminescence (MEPL) and concomitant third‐harmonic generation (THG). The multiphoton absorption (MPA) parameters of 1 are superior to other multiphoton emission materials including the perovskite nanocrystals. The incorporation of pillar linkers slows down the charge transfer between layers of Zn‐TCPE, and the aromatic core of pillar linkers has a great influence on the MPA performance of the corresponding frameworks. Abstract : Zinc‐tetraphenylethylene‐based metal–organic frameworks (MOFs) exhibit highly efficient multiphoton excited photoluminescence (MEPL) with concomitant third‐harmonic generation (THG). MEPL parameters of the Zn‐AIEgen hinged MOFs are far superior to some of the best multiphoton absorption (MPA) materials including the perovskite nanocrystals.