Enhanced Structural Organization in Covalent Organic Frameworks Through Fluorination
Sampath B Alahakoon1, Gregory T McCandless1, Arosha A K Karunathilake1
1Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 W. Campbell Rd, Richardson, TX, 75080, USA.
Abstract:
Here, we report a structure-function study of imine covalent organic frameworks (COFs) comparing a series of novel fluorine-containing monomers to their non-fluorinated analogues. We found that the fluorine-containing monomers produced 2D-COFs with not only greatly improved surface areas (over 2000 m2 g-1 compared to 760 m2 g-1 for the non-fluorinated analogue), but also with improved crystallinity and larger, more defined pore diameters. We then studied the formation of these COFs under varying reaction times and temperatures to obtain a greater insight into their mechanism of formation.
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