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| TITLE | Multi-Light-Responsive Upconversion-and-Downshifting- Based Circularly Polarized Luminescent Switches in Chiral Metal–Organic Frameworks |
|---|---|
| AUTHOR | Tonghan Zhao |
| YEAR | 2021 |
| JOURNAL | Advanced Materials |
| ABSTRACT | Metal–organic frameworks (MOFs) have attracted tremendous attention for several novel applications. However, functional MOFs with light-responsive circularly polarized luminescence (CPL) are not examined in detail. Therefore, a dual CPL switch exhibiting both upconversion (UC) and downshifting (DS) CPL in the solid state is constructed by loading a luminescent diarylethene derivative (DAEC) and UC nanoparticles (UCNPs) into chiral MOFs.
The chiral MOF⊃DAEC composites exhibit both photoswitchable luminescence and DS-CPL properties under alternating UV and visible light irradiation. Additionally, a reversible UC-CPL switch is realized using near-infrared (NIR) and visible light irradiation by introducing energy-level-matched UCNPs and DAEC into the chiral MOFs. The dissymmetry factor (glum) of UC-CPL is noted to be significantly amplified through energy transfer compared to that of DS-CPL, which indicates that the information on circular polarization can be manipulated by altering the incident light.
A chiroptical logic circuit with a 2D information output is designed with UV, visible, and NIR light as inputs by setting a rational threshold. |
| FULL ARTICLE | https://doi.org/10.1002/adma.202101797 |
| INSTRUMENT | J-1500, CPL |
| KEYWORDS | chirality transfer, chiroptical switches, energy transfer,metal-organic frameworks, upconversion circularly polarized luminescenece |
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