Search results for "Metallacrown"
showing 2 items of 12 documents
Analyzing the enforcement of a high-spin ground state for a metallacrown single-molecule magnet
2016
We have studied element-selective magnetic properties of the hetero- and homometallic metallacrowns $\mathrm{Cu}{(\mathrm{II})}_{2}[12\ensuremath{-}{\mathrm{MC}}_{YN(Shi)}\ensuremath{-}4]$ ($Y=\text{Cu}$, Fe, in short ${\mathrm{CuCu}}_{4}$ and ${\mathrm{CuFe}}_{4}$). These metallacrowns comprise four Fe or Cu ions surrounding a central Cu ion. Using x-ray magnetic circular dichroism we have probed local symmetries, electronic configuration, orbital and spin magnetic moments of the magnetic ions. The ratio between the Cu and Fe moment of $\ensuremath{-}0.11$ is independent of temperature in the range of 15 K to 90 K. The Cu moment shows antiparallel to the Fe moment. For ${\mathrm{CuCu}}_{4}…
Metallacrown Complexes Reaching the Nanosize Regime
2018
Abstract The chapter discusses the merit of metallacrown complexes to achieve multifunctional and multidimensional molecular materials. It introduces basic design strategies for discrete metallacrown complexes and discusses the predictability of molecular properties. Thereafter, it reviews two of the most outstanding molecular properties of metallacrown complexes, namely, the magnetic and luminescence characteristics. Most interestingly, for metallacrown complexes, such properties could be combined in one single molecule, giving rise to stable “multifunctional” molecular materials. Moreover, MCs are suitable building blocks to construct multidimensional coordination polymers. The chapter pr…