Engineering Screw Dislocations in Covalent Organic Frameworks
Bhausaheb Dhokale, Kira Coe-Sessions, Michael J. Wenzel, Alathea E. Davies, Taylor Kelsey, Jonathan A. Brant, Laura de Sousa Oliveira, B. A. Parkinson, John O. Hoberg
Abstract
We report the application of a Pictet-Spengler reaction to the synthesis of covalent organic frameworks (COFs) using functionalized terephthalaldehydes. The COFs produced show an increased propensity to generate screw dislocations and produce multilayered flakes when compared with other 2D-COFs. Using HRTEM, definitive evidence for screw dislocations was obtained and is presented. The effects on separations using these materials in membranes are also reported.
Topics & Concepts
ChemistryCovalent bondOrganic chemistryCovalent Organic Framework ApplicationsMetal-Organic Frameworks: Synthesis and ApplicationsLuminescence and Fluorescent Materials