Nickel(ii) complexes of N-CH2CF3 cyclam derivatives as contrast agents for 19F magnetic resonance imaging†
Abstract
Kinetically inert Ni(II) complexes of N1,N8-bis(2,2,2-trifluoroethyl)cyclams with hydrogen atoms or phosphonic acid groups in the N4,N11-positions show significant 19F NMR relaxation rate enhancement useful for 19-fluorine MRI imaging.