Abstract
Fullerene single molecule magnets (SMMs) DySc2N@C80 and Dy2ScN@C80 are functionalized via a 1,3-dipolar cycloaddition with surface-anchoring thioether groups. The SMM properties of Dy-fullerenes are substantially affected by the cycloaddition. Submonolayers of the physisorbed derivatives exhibit magnetic hysteresis on an Au(111) surface at 2 K as revealed by X-ray magnetic circular dichroism.
Highlights
Fullerene single molecule magnets (SMMs) DySc2N@C80 and Dy2ScN@C80 are functionalized via a 1,3-dipolar cycloaddition with surface-anchoring thioether groups
The number of molecules that have been studied on different surfaces is very low compared to the number of published SMMs, and hysteresis of magnetization in monolayers deposited on metals has been observed so far only for TbPc2,3 Fe4,4 and Dy2ScN@C80.5
DySc2N@C80-Ih (1) and Dy2ScN@C80-Ih (2) were obtained as described before.11f,15 endohedral metallofullerenes (EMFs) were functionalized with a thioether –S–CH3 group via 1,3-dipolar cycloaddition (Fig. 1) adopting a procedure developed for C60-self-assembled monolayer (SAM).[14]
Summary
Fullerene single molecule magnets (SMMs) DySc2N@C80 and Dy2ScN@C80 are functionalized via a 1,3-dipolar cycloaddition with surface-anchoring thioether groups. This problem meets with serious difficulties in both bringing the molecules to metallic substrates and in studying the magnetic properties of monolayers.[2] As a result, the number of molecules that have been studied on different surfaces is very low compared to the number of published SMMs, and hysteresis of magnetization in monolayers deposited on metals has been observed so far only for TbPc2,3 Fe4,4 and Dy2ScN@C80.5
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