Improved Redox-Responsive Cobalt(II) 19F Magnetic Resonance Imaging Agents through Addition of Hydrogen Bond Donors | Inorganic Chemistry pubs.acs.org/doi/10.1021/... @CHEMilyQue and co-workers @InorgChem #cobalt_II #19F #NRI #HBondDonors #hydroxypropyl #ROS