2026-01-01 NANO RESEARCH 2026 19(卷), 1(期), (null页)
A series of dual-extended-polyhedral metal-organic frameworks (MOFs) was constructed based on the 14-coordinated building blocks (SBBs) with enhanced stability and tunable functionality for high water uptake efficiency and capacity. Exceptional water stability was demonstrated by the retention of chemical integrity and crystallinity of USC-CP-5 (where USC-CP stands for University of South China coordination polymer) after exposure to boiling water for 24 h. Functionalization with -Cl, -OCH3, -OH, and -NH2 groups of USC-CP-5 resulted in water uptake capacities of 450, 460, 490, and 590 cm3 center dot g-1 at relative pressure (P/P0) = 0.9, respectively. This performance is ascribed to both the increased hydrophilicity of the ligands and stronger 5-NH2 exhibits a significant water uptake of 38.5 wt.% at P/P0 = 0.3 and releases 0.44 L center dot kg-1 water between 25 and 65 degrees C. This water release process is reversible for at least 100 cycles with minimal weight loss of only 1.6 wt.%. Consequently, USC-5-NH2 holds considerable potential for harvesting and releasing atmospheric water in arid desert regions, powered by solar energy.