Molecular structure of a catena-COF (IMAGE) University of California - Berkeley Caption The individual building blocks of a catena-COF are polyhedral molecules — a type of adamantane — that link arms to form a 2D mesh or 3D network that is sturdy but flexible. Credit Tianqiong Ma, UC Berkeley Usage Restrictions none License Original 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.