Abstract
Carbide clusterfullerene DyYTiC@C80-Ih with three different metal atoms in the endohedral cluster is obtained by arc-discharge synthesis with methane as reactive gas and is successfully isolated by HPLC. The compound shows single-molecule magnetism (SMM) with magnetic hysteresis below 8 K. The SMM properties of DyYTiC@C80 are compared to those of DySc2N@C80 and the influence of the central atom in the endohedral cluster is analyzed.
Highlights
Carbide clusterfullerene DyYTiC@C80-Ih with three different metal atoms in the endohedral cluster is obtained by arc-discharge synthesis with methane as reactive gas and is successfully isolated by HPLC
The composition of the carbide cluster is fixed by Ti, which forms a double bond with the central carbon atom; M is a trivalent metal such as Sc, Y, or a lanthanide.2f,11 The variation of the cluster composition is not possible, i.e. formation of carbide clusterfullerenes with Ti3C, MTi2C, or M3C clusters has not been detected, which dramatically simplifies the isolation
If methane is used as a reactive gas in the arc-discharge synthesis, lanthanide-based M2TiC@C80-Ih can be obtained with a high degree of selectivity.11a The carbide cluster in M2TiC@C80 is isoelectronic and isostructural to the nitride cluster in M2ScN@C80, and both types of clusters have very similar charge distribution.11b Similar to Dy2ScN@C80,12 Dy2TiC@C80 has been found to be a single molecule magnet (SMM),11a but considerably softer than the former
Summary
Carbide clusterfullerene DyYTiC@C80 featuring three different metals in the endohedral cluster and its single-ion magnetism† Carbide clusterfullerene DyYTiC@C80-Ih with three different metal atoms in the endohedral cluster is obtained by arc-discharge synthesis with methane as reactive gas and is successfully isolated by HPLC.
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