MIL-101 the MOF (IMAGE) DOE/Pacific Northwest National Laboratory Caption Squeezing iron-containing ferrocene (not to scale) in the pores of the metal-organic framework known as MIL-101 lets ferrocene's iron snag oxygen from passing air. Credit PNNL Usage Restrictions Please credit PNNL 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.