▎ 摘　　要

A facile way to fabricate spin crossover-graphene nanocomposites has been developed, and [Fe(Htrz)(2)(trz)](BF4)-graphene (SCO-G) nanocomposites have been successfully synthesized and characterized. SEM and TEM demonstrated that [Fe(Htrz)(2)(trz)](BF4) nanoparticles (ca. 50 nm) were distributed uniformly onto the surface of the graphene. Interestingly, graphene as a substrate produced an effect on the spin crossover properties of [Fe(Htrz)(2)(trz)](BF4) nanoparticles.