ZIF-7 (Zn(bIm)2) Metal Organic Frameworks (MOFs) Powder for Gas Absorption and Separation, CGASMOFZIF7
Use your own shipping account?
We support FedEx, UPS, and DHL third-party billing for institutional customers.
Place your order first, then email shipping@echemsupplies.com with your account details and order number. We'll generate the label using your account and refund your shipping charges, less a handling fee.
ZIF-7 (Zn(bIm)2, where bIm = benzimidazolate) is a zeolitic imidazolate framework crystallizing in a sodalite (SOD) topology. It is constructed from tetrahedrally coordinated Zn^{2+} metal nodes connected by bulky, rigid benzimidazolate linkers. ZIF-7 is notable for its pronounced guest-induced structural gate-opening transitions (breathing effect) and sub-nanometer ultramicropores that enable sharp molecular sieving
The key structural and functional features of the ZIF-7 are: (1) Narrow Ultramicroporous Sodalite Network: Central Pore Cavity: ~ 7.9 Å internal cage diameter (substantially smaller than ZIF-8's ~11.6 Å cage due to the bulky fused benzene rings). Static Window Aperture: Nominal 6-membered ring aperture of ~ 2.9–3.0 Å. (2) Reversible Phase Transition ("Gate-Opening"): ZIF-7 undergoes a structural transition between two distinct phases: Narrow-Pore Phase (ZIF-7-II / Low-pressure state): The benzimidazole linkers are oriented inward, restricting the window to < 3.0 Å. In this phase, it excludes larger gases and shows negligible 77K N2 adsorption. Large-Pore Phase (ZIF-7-I / Gate-opened state): Under critical guest pressure, cooperative benzimidazolate ring reorientations flip the framework into an open state, expanding the aperture to ~ 3.8–4.0 Å with a noticeable unit cell volume change (~ 5–10%). (3) Hydrothermal & Chemical Stability: Highly hydrophobic with excellent thermal stability (up to ~ 400 °C in N2) and resistance to boiling water and alkaline media. Decomposes in acidic streams (pH < 5).
| Part Number | CGASMOFZIF7 (C-GAS-MOF-ZIF7) |
| CAS | 909531-29-9 |
| Chemical Formula | C20H16N4Zn2 |
| Color | White Powder |
| Average Sizes | ~200-500 nm |
| BET | ~250-450 m2/g |
| Pore Size | 0.3-0.6 nm |
| Primary Applications |
Gas absorption, storage, and separation. Wastewater treatment, ion separation, |
| Package Grade | 5 g/bottle |
References:
- C. Ma, et al., Fabrication of Mixed-Metal ZIF‑7 Membrane by the Self-Conversion of Hydroxy Double Salts for Gas Separation, Ind. Eng. Chem. Res. (2024) 63 (22): 9922–9932
- Z. Song, et al., Fabrication of ZIF-7 membranes by electrochemical deposition in mixed solvent for efficient helium separation, Journal of Membrane Science, 2026, 738, 124821