Merging One- and Multi-Photon Processes in Hydrogen-Bonded Organic Frameworks for Enhanced NIR Light-Driven
Chen-Hui Liu1, Zhong-Hao Wang1, Yin-Hui Huang1
1MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, GBRCE for Functional Molecular Engineering, LIFM, IGCME, Sun Yat-Sen University, Guangzhou, 510006, China.
None:
Direct application of near-infrared (NIR) light for solar-thermal and solar-chemical conversions is of emergent interest to improving efficiency in solar-energy utilization. Herein, we report a synthetic approach to NIR-responsive materials by self-assembly of hydrogen-bonded organic frameworks (HOF-1/2/3) from multifunctionalized Ru-components incorporating chiral, photoactive, H-bonding, π-stacking, and protonation/deprotonation subunits. Significantly, protonation of the imidazole-subunits in HOF-3 promotes densified packing to extend NIR absorption tail up to 1100 nm with a narrowed bandgap of 1.41 eV, meanwhile leads to spontaneous resolution of enantiomeric Δ-/Λ-HOF-3. Consequently, remarkably enhanced photothermal effect and photocatalytic performance, including chiroptical activity induced by circularly polarized NIR light, are achieved through synergy of direct one- and multi-photon NIR absorption, underscoring effectiveness to bring multifunctionalities into ordered HOFs for generation of robust and effective materials with multimode NIR responsiveness.
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