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. 2021 Sep 9;60(18):13950–13954. doi: 10.1021/acs.inorgchem.1c01838

Figure 1.

Figure 1

Schematic mechanistic picture of the LIESST effect in the case of excitation into the lowest 1MC (1T1g) state by 530 nm light. The wavy arrow illustrates the low-temperature HS → LS relaxation by tunneling. The excited-state lifetimes are taken for [Zn0.9Fe0.1(ptz)6](BF4)2 from ref (6). The electronic state labels are consistent with Oh point group symmetry. Also shown are the eg* antibonding orbitals of the complex investigated in the present work, [Fe(NCH)6]2+, which are populated in the excited states.