Exploring template-bound dinuclear copper porphyrin nanorings by EPR spectroscopy.

ABSTRACT: Electron paramagnetic resonance (EPR) spectroscopy has been used to study the molecular geometry as well as metal-ligand interactions in ten-membered porphyrin nanorings ( c-P10_Cu2 ) containing two copper and eight zinc centers. The presence of copper in the structures allows intramolecular interactions, including dipolar interactions between electron spins and hyperfine interactions to be quantified. Results obtained for c-P10_Cu2 samples bound to two molecular templates with four or five binding sites, respectively, are compared to those obtained for a sample of the porphyrin ring in the absence of any templates. It is shown that the observed lower binding affinity of the nitrogen ligand to copper as compared to zinc has a strong impact on

SUBMITTER: Richert S 

PROVIDER: S-EPMC5363685 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature