Cofacial Cobalt Porphyrin (IMAGE) University at Buffalo Caption The new catalyst, a cofacial cobalt porphyrin, shown from various perspectives. The compound consists of two flat molecules called cobalt porphyrins, which are stacked on top of each other like sandwich bread and linked by ruthenium 'clips.' Credit Credit: Matthew Crawley Usage Restrictions This image may only be used in news reports discussing the research in the related press release. 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.