1. Influence of Solvent-Like Sidechains on the Adsorption of Light Hydrocarbons in Metal-Organic Frameworks
- Author
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Andreas Schneemann, Philip L. Llewellyn, Eric D. Bloch, Roland A. Fischer, Jeffrey R. Long, Sebastian Henke, Ruhr Univ Bochum, Lehrstuhl Anorgan Chem 2, Organomet & Mat Chem, D-44801 Bochum, Germany, Ruhr Univ Bochum, Lehrstuhl Anorgan Chem 2, Organomet & Mat Chem, Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA, affiliation inconnue, Matériaux divisés, interfaces, réactivité, électrochimie (MADIREL), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC), University of California [Berkeley] (UC Berkeley), University of California (UC), and Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
chemistry.chemical_classification ,Organic Chemistry ,General Chemistry ,DABCO ,[CHIM.MATE]Chemical Sciences/Material chemistry ,Branching (polymer chemistry) ,Catalysis ,host-guest systems ,Solvent ,chemistry.chemical_compound ,Adsorption ,Hydrocarbon ,chemistry ,Acetylene ,Polymer chemistry ,Organic chemistry ,Metal-organic framework ,hydrocarbons ,metal-organic frameworks ,linker functionalization ,Octane - Abstract
International audience; A variety of strategies have been developed to adsorb and separate light hydrocarbons in metal-organic frameworks. Here, we present a new approach in which the pores of a framework are lined with four different C3 sidechains that feature various degrees of branching and saturation. These pendant groups, which essentially mimic a low-density solvent with restricted degrees of freedom, offer tunable control of dispersive host-guest interactions. The performance of a series of frameworks of the type Zn-2(fu-bdc)(2)(dabco) (fu-bdc(2-) = functionalized 1,4-benzene-dicarboxylate; dabco = 1,4-diazabicyclo[2.2.2]octane), which feature a pillared layer structure, were investigated for the adsorption and separation of methane, ethane, ethylene, and acetylene. The four frameworks exhibit low methane uptake, whereas C2 hydrocarbon uptake is substantially higher as a result of the enhanced interaction of these molecules with the ligand sidechains. Most significantly, the adsorption quantities and selectivity were found to depend strongly upon the type of sidechains attached to the framework scaffold.
- Published
- 2015
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