COF Schematic (IMAGE) University of Pennsylvania Caption A graphical representation of the covalent organic frameworks, or COFs, created by a collaborative team of experimental and theoretical chemists. Large porphyrin structures (labelled as TAPP) form an egg carton-like lattice that forms multiple stacks, with pyridine molecules (shown in blue) filling the spaces in between the layers. An electrical current is depicted in green. Credit Felice Macera Usage Restrictions please include credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.