Synthesis of the first completely spin-compatible N@C60 cyclopropane derivatives by carefully tuning the DBU base catalyst

Shen Zhou; Ilija Rašović; G Andrew D Briggs; Kyriakos Porfyrakis

doi:10.1039/c5cc01459j

Synthesis of the first completely spin-compatible N@C60 cyclopropane derivatives by carefully tuning the DBU base catalyst

Chem Commun (Camb). 2015 Apr 28;51(33):7096-9. doi: 10.1039/c5cc01459j.

Authors

Shen Zhou¹, Ilija Rašović, G Andrew D Briggs, Kyriakos Porfyrakis

Affiliation

¹ Department of Materials, Oxford University, Oxford OX1 3PH, UK. kyriakos.porfyrakis@materials.ox.ac.uk.

PMID: 25811940
DOI: 10.1039/c5cc01459j

Abstract

Two cyclopropane derivatives of N@C60 were synthesised by well-controlled Bingel reactions, in which 94% of the spin centres were retained, as confirmed by a series of quantitative electron spin paramagnetic resonance (EPR) measurements. Further study on the influence of the DBU catalyst base revealed a spin loss mechanism through a fullerene-DBU diradical.