UIO-66-(COOH)2(Zr) Metal Organic Frameworks (MOFs) Powder for Gas Absorption and Separation, CGASMOFUIO66COOHZr
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UiO-66-(COOH)2 (also referred to as UiO-66-2COOH or Zr6O4(OH)4[BDC-(COOH)2]6) is an isoreticular, dicarboxylic acid-functionalized zirconium metal-organic framework with an fcu topology. Synthesized using 1,2,4,5-benzenetetracarboxylic acid (pyromellitic acid, H4PTEC), two of the four carboxylate groups coordinate to the Zr6 clusters to form the 3D network, while the remaining two uncoordinated -COOH groups project directly into the pore channels.
For Gas Absorption & Separation, the key structural and functional features of the UIO-66-(COOH)2 are: (1) Aperture Constriction & Ultramicroporosity: Octahedral Cages: Free internal diameter of ~ 8.5–9.5 Å (constricted from 11 Å in pristine UiO-66). Tetrahedral Cages: Free internal diameter of ~ 5.5–6.0 Å. Triangular Window Apertures: Effective aperture narrowed to ~ 3.6–4.2 Å by the protruding -COOH groups, enhancing size-exclusion sieving for small gas molecules. (2) Brønsted Acidic & Polar Pore Walls: Dense, uncoordinated -COOH groups line the channels, providing polar hydrogen-bonding donors (-OH) and carbonyl acceptors (C=O). This generates high electrostatic field gradients that enhance interactions with quadrupolar and polar guest molecules. (3) Robust Chemical Stability: Maintains Zr(IV)–O coordination bond stability, resisting boiling water, high-humidity streams, and strongly acidic media (pH=0.5–7).
| Part Number | CGASMOFUIO66COOHZr (C-GAS-MOF-UIO66COOHZr) |
| CAS | 1458048-15-1 |
| Color | White Powder |
| Average Sizes | 100-300 nm |
| BET | ~600-950 m2/g |
| Pore Size | 0.1-0.7 nm |
| Primary Applications |
Gas absorption, storage, and separation. Wastewater treatment, ion separation Heterogeneous catalysis |
| Package Grade | 5 g/bottle |
References:
- M. A. Moreira, et al., Adsorption Equilibrium of Carbon Dioxide, Methane, Nitrogen, Carbon Monoxide, and Hydrogen on UiO-66(Zr)_(COOH)2, J. Chem. Eng. Data (2019) 64 (11): 4724–4732.
- J. Y. Song, et al., UiO-66-Type Metal–Organic Framework with Free Carboxylic Acid: Versatile Adsorbents via H‑bond for Both Aqueous and Nonaqueous Phases, ACS Appl. Mater. Interfaces (2016) 8 (40): 27394–27402.