Mn(2+) Complexes with 12-Membered Pyridine Based Macrocycles Bearing Carboxylate or Phosphonate Pendant Arm: Crystallographic, Thermodynamic, Kinetic, Redox, and 1H/17O Relaxation Studies

Abstract

We investigated the Mn(2+) complexes of two 12-membered, pyridine-containing macrocyclic ligands bearing one pendant arm with a carboxylic acid (HL_1, 6-carboxymethyl-3,6,9,15-tetraazabicyclo[9.3.1] pentadeca-1(15),11,13-triene) or a phosphonic acid function (H2L_2, 6-dihydroxyphosphorylmethyl-3,6,9,15-tetraazabicyclo[9.3.1]pentadeca-1(15),11,13-triene), with respect to Magnetic Resonance Imaging.

Keywords

• pressure NMR kinetics
• magnetic-field dependence
• resonance-imaging memri
• MRI contrast agents
• water-exchange
• metal-complexes
• lanthanide(III) complexes
• manganese(II) complexes
• crystal-structure
• Mn(II) complexes