| Popis: |
A library of novel tetra-aza macrocyclic molecules, specifically 3,6,9,15-tetraazabicyclo [9.3.1]pentadeca-1(15),11,13-trienederivatives, capable of chelating metal ions in vivo have been synthesized. Applications of these complexes are currently being pursued as a 1) therapeutic, focusing on radical scavenging and metal chelation, and 2) diagnostic tool such as magnetic resonance imaging (MRI) contrast agents when complexed with specific metal ions. However, a full study of the electronic effects imparted by substitution to the pyridyl moiety and the subsequent impact on the metal center have not been explored. The objective of the present study is to characterize metal complexes of four tetra-aza macrocyclic metal chelating molecules. The pyridyl functional groups studied include: A) uper (II) complexes. Analysis of the resulting copper (II) complex of the p-nitrile tetra-aza macrocycle (L6) indicate a six-coordinate metal center based on X-ray diffraction. UV-visible spectroscopy and electrochemistry help to confirm donor strength among the ligand series as well as a comparison to other tetra-aza macrocycles of interest. modified pyridyl (L1), B) p-hydroxyl (L2), and C)p-nitrile modified pyridyls (L6) on a pyclen base structure. Notable progress has been made in developing an optimal procedure for obtaining cop. Click here to listen to our interview with Brian Niebuhr on Soundcloud. |
