Synthesis and Properties of Open Fullerenes Encapsulating Ammonia and Methane.

ABSTRACT: We describe the synthesis and characterisation of open fullerene (1) and its reduced form (2) in which CH₄ and NH₃ are encapsulated, respectively. The ¹ H NMR resonance of endohedral NH₃ is broadened by scalar coupling to the quadrupolar ¹⁴ N nucleus, which relaxes rapidly. This broadening is absent for small satellite peaks, which are attributed to natural abundance ¹⁵ N. The influence of the scalar relaxation mechanism on the linewidth of the ¹ H ammonia resonance is probed by variable temperature NMR. A rotational correlation time of τ_c =1.5 ps. is determined for endohedral NH₃ , and of τ_c =57±5 ps. for the open fullerene, indicating free rotation of the encapsulated molecule. I

SUBMITTER: Bloodworth S 

PROVIDER: S-EPMC5838534 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature