Carbon dioxide capture in metal-organic frameworks.
نویسندگان
چکیده
Efforts to utilize metal-organic frameworks, a new class of materials exhibiting high surface areas, tunable pore dimensions, and adjustable surface functionality, for CO2 capture will be presented. Open metal coordination sites on the framework surface can deliver a high CO2 loading capacity at low pressures. However, additional criteria such as water stability and the selective binding of CO2 over N2 must also be considered. Toward that end, we have targeted airand water-stable frameworks bearing surfaces coated with alkylamine groups. Use of 1,3,5-benzenetristriazolate (BTTri3–) as a bridging ligand has led to sodalite-type frameworks of the type M3[(M4Cl)3(BTTri)8]2, possessing open M2+ coordination sites and exhibiting good chemical and thermal stability. Attachment of ethylenediamine to the M2+ sites within this structure can generate a material that selectively binds CO2 over N2 with excellent cycling performance. In addition, the application of frameworks with redox-active transition metal sites for the capture of O2 from air will be discussed (see Figure 1). Particular emphasis will be placed on diffraction studies aimed at identifying the gas adsorption sites within the structures. Host: Professor Lawrence Que Jr. Refreshments will be served prior to the seminar. Department of Chemistry
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عنوان ژورنال:
- Chemical reviews
دوره 112 2 شماره
صفحات -
تاریخ انتشار 2012