Paramagnetic properties adjustment for Gd@C2v(9)-C82 by regioselective multi-amination

The electron spin characters of paramagnetic endohedral metallofullerenes (EMFs) are sensitive to their surroundings, which offer an opportunity to manipulate their paramagnetic properties. Here we reported the amination of paramagnetic Gd@C82 and revealed that morpholine groups can be used as a tool to fine-tune properties of Gd@C82. Changes of their paramagnetic properties have been observed under different temperatures and among three derivatives. Addition of morpholine groups eliminates the single unpaired electron on the carbon cage, and causes lower symmetry of the carbon cage and location limit of encapsulated gadolinium, leading serious restriction of Gd@C82 and gadolinium motion. The high sensitivity of spin population to chemical modification offers us the possibility to investigate the spin qubit property and further realize quantum control on a molecular level. [Display omitted]