Spin Dynamic of Tri-addition Endohedral Nitrogen Fullerene with Transversal Chemical Functionalization

Abstract

Endohedral nitrogen fullerenes are ideal spin-carrier molecules, possessing both the internal spin inertia for ultra-long coherence time and external chemical activity for facile modifications. Using the multifunctionality of the fullerene [6,6] bonds, we synthesized two trans-3 tris-addition endohedral nitrogen fullerene cyclopropane derivatives via well-controlled Bingel reactions. Compared to previous axial additions, the transversal modification of the fullerene provids an extensible approach for constructing two-dimensional spin assemblies in the future. Their molecular structure and spin properties were characterized using NMR and EPR, respectively. The tris-adducts in the D3 point group showed well-resolved zero-field spliting effects of the 4S3/2 spin systems. Spin relaxation time measurements and nutation experiments prove the microseconds coherence time and energy level addressablity of these derivatives.