{"product_id":"cgasmofzif7","title":"ZIF-7 (Zn(bIm)2) Metal Organic Frameworks (MOFs) Powder for Gas Absorption and Separation, CGASMOFZIF7","description":"\u003cp\u003eZIF-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\u003c\/p\u003e\n\u003cp\u003eThe key structural and functional features of the ZIF-7 are: (1) \u003cstrong\u003eNarrow Ultramicroporous Sodalite Network\u003c\/strong\u003e: \u003cem\u003eCentral\u003c\/em\u003e \u003cem\u003ePore Cavity\u003c\/em\u003e: ~ 7.9 Å internal cage diameter (substantially smaller than ZIF-8's ~11.6 Å cage due to the bulky fused benzene rings).\u003cem\u003e Static Window Aperture\u003c\/em\u003e: Nominal 6-membered ring aperture of ~ 2.9–3.0 Å. (2) \u003cstrong\u003eReversible Phase Transition (\"Gate-Opening\")\u003c\/strong\u003e: ZIF-7 undergoes a structural transition between two distinct phases: \u003cem\u003eNarrow-Pore Phase (ZIF-7-II \/ Low-pressure state)\u003c\/em\u003e: The benzimidazole linkers are oriented inward, restricting the window to \u0026lt; 3.0 Å. In this phase, it excludes larger gases and shows negligible 77K N2 adsorption. \u003cem\u003eLarge-Pore Phase (ZIF-7-I \/ Gate-opened state)\u003c\/em\u003e: 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) \u003cstrong\u003eHydrothermal \u0026amp; Chemical Stability\u003c\/strong\u003e: 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 \u0026lt; 5).\u003c\/p\u003e\n\u003ctable border=\"1\" style=\"width: 100.071%; height: 257.125px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 26.875px;\"\u003e\n\u003ctd style=\"width: 24.6929%; height: 26.875px;\"\u003ePart Number\u003c\/td\u003e\n\u003ctd style=\"width: 72.8334%; height: 26.875px;\"\u003eCGASMOFZIF7 (C-GAS-MOF-ZIF7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.875px;\"\u003e\n\u003ctd style=\"width: 24.6929%; height: 26.875px;\"\u003eCAS\u003c\/td\u003e\n\u003ctd style=\"width: 72.8334%; height: 26.875px;\"\u003e909531-29-9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.6929%;\"\u003eChemical Formula\u003c\/td\u003e\n\u003ctd style=\"width: 72.8334%;\"\u003eC20H16N4Zn2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.875px;\"\u003e\n\u003ctd style=\"width: 24.6929%; height: 26.875px;\"\u003eColor\u003c\/td\u003e\n\u003ctd style=\"width: 72.8334%; height: 26.875px;\"\u003eWhite Powder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.875px;\"\u003e\n\u003ctd style=\"width: 24.6929%; height: 26.875px;\"\u003eAverage Sizes\u003c\/td\u003e\n\u003ctd style=\"width: 72.8334%; height: 26.875px;\"\u003e~200-500 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.875px;\"\u003e\n\u003ctd style=\"width: 24.6929%; height: 26.875px;\"\u003e\u003cem\u003eBET\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.8334%; height: 26.875px;\"\u003e~250-450 m2\/g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 26.875px;\"\u003e\n\u003ctd style=\"width: 24.6929%; height: 26.875px;\"\u003e\u003cem\u003ePore Size\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.8334%; height: 26.875px;\"\u003e0.3-0.6 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 71.2px;\"\u003e\n\u003ctd style=\"width: 24.6929%; height: 71.2px;\"\u003e\u003cem\u003ePrimary Applications\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.8334%; height: 71.2px;\"\u003e\n\u003cp\u003eGas absorption, storage, and separation. \u003c\/p\u003e\n\u003cp\u003eWastewater treatment, ion separation, \u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 24.675px;\"\u003e\n\u003ctd style=\"width: 24.6929%; height: 24.675px;\"\u003e\u003cem\u003ePackage Grade\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.8334%; height: 24.675px;\"\u003e5 g\/bottle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eReferences:\u003c\/b\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cb\u003e\u003c\/b\u003e\u003ca href=\"https:\/\/pubs.acs.org\/iecred\/article-abstract\/63\/22\/9922\/862462\/Fabrication-of-Mixed-Metal-ZIF-7-Membrane-by-the?redirectedFrom=fulltext\"\u003eC. 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\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0376738825011342\"\u003eZ. 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\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"TYXC","offers":[{"title":"Default Title","offer_id":48258737045734,"sku":"CGASMOFZIF7","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CGASMOFZIF7_main.jpg?v=1788070448","url":"https:\/\/echemsupplies.com\/products\/cgasmofzif7","provider":"EChem Supplies","version":"1.0","type":"link"}