Fig. 6: Schematic of the proposed reaction pathway of the photoinduced spin transition of 1, indicated by the TA, MIR and UED experiments. | Nature Communications

Fig. 6: Schematic of the proposed reaction pathway of the photoinduced spin transition of 1, indicated by the TA, MIR and UED experiments.

From: Direct observation of photoinduced sequential spin transition in a halogen-bonded hybrid system by complementary ultrafast optical and electron probes

Fig. 6: Schematic of the proposed reaction pathway of the photoinduced spin transition of 1, indicated by the TA, MIR and UED experiments.The alternative text for this image may have been generated using AI.

Initial photoexcitation (hv) of the ligand-to-metal-charge-transfer (LMCT) transition of the [Fe(Iqsal)2]+ cations in the LT phase (low-spin (LS) with strong dimerization (SD)) is followed by multiple intersystem crossing (ISC) processes and an intramolecular vibrational energy redistribution (IVR) process in the high-spin (HS) state within 0.8 ps. After 15 ps, the [Ni(dmit)2]− anions start to rearrange from SD to weak dimerization (WD) states as a slow approximately 50 ps dimer softening dynamics.

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