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(a) EXAFS of [Fe(terpy)2]2+ in the ground state; the fitted bond lengths are R(Fe–Nax) = 1.874 ± 0.004 Å and R(Fe–Neq) = 1.969 ± 0.004 Å. (b) EXAFS spectrum of the photoexcited quintet state of [Fe(terpy)2]2+; the fitted bond lengths are R(Fe–Nax) = 2.08 ± 0.02 Å and R(Fe–Neq) = 2.20 ± 0.01 Å.
