Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 15, Issue 15, Pages 5493-5498Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp43390k
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The electronic structure of Mn@Si-14(+) is determined using DFT and CASPT2/CASSCF(14,15) computations with large basis sets. The endohedrally Mn-doped Si cationic cluster has a D-3h fullerene-like structure featuring a closed-shell singlet ground state with a singlet-triplet gap of similar to 1 eV. A strong stabilizing interaction occurs between the 3d(Mn) and the 2D-shell(Si-14) orbitals, and a large amount of charge is transferred from the Si-14 cage to the Mn dopant. The 3d(Mn) orbitals are filled by encapsulation, and the magnetic moment of Mn is completely quenched. Full occupation of [2S, 2P, 2D] shell orbitals by 18 delocalized electrons confers the doped Mn@Si-14(+) cluster a spherically aromatic character.
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