MOF-303(Al) Metal Organic Frameworks (MOFs) Powder for Gas Absorption and Separation, CGASMOF303Al

MOF-303(Al) (Al(OH)(PDC), where PDC = 1H-pyrazole-3,5-dicarboxylate) is a high-performance microporous metal-organic framework built from infinite 1D rod-like secondary building units (SBUs) of corner-sharing AlO4(OH)2 octahedra bridged by ditopic pyrazole-dicarboxylate linkers. Originally pioneered for low-humidity atmospheric water harvesting, its hydrophilic channels and precise pore dimensions make it an exceptional candidate for gas separation, polar molecule sieving, and selective carbon capture.

For Gas Absorption & Separation, the key structural features of the MOF-303(Al) are: (1) 1D Extended Rhombic Channels: Features uniform, non-collapsible 1D rhombic/diamond-shaped channels with an accessible diameter of ~ 6.0–8.5 Å. Unlike MIL-53(Al), the framework is rigid and does not undergo breathing transitions, ensuring predictable molecular diffusion. (2) Dual Hydrophilic / Basic Active Sites: The pore walls are lined with dense uncoordinated pyrazole nitrogen atoms (-NH/=N-) and bridging hydroxyl (-OH) groups. These provide strong hydrogen bonding and dipole-quadrupole interaction sites for polar and polarizable gas guests. (3) Chemical, Hydrothermal & Thermal Stability: Exhibits exceptional hydrothermal stability across thousands of water sorption/desorption cycles. It remains structurally intact in boiling water, wide pH ranges (pH=2–10), and is thermally stable up to ~ 400°C in air/inert atmospheres.

References:

1. J. L. Obeso, et al., MOF-303 as an Effective Adsorbent to Clean CH4: SO2 Capture and Detection, ACS Appl. Energy Mater. (2023) 6 (18): 9084–9091.
2. L. T. Chi, et al., Mixed-Linker-Directed Seed-Free Growth of CO2-Selective MOF-303 Membranes, Adv. Mater. Technologies, 2026,11, e01880