Preprint of "Coherently induced coupling between skeletal and valence vibrations in electronically excited di-iridium(I) isocyanide complex"

Le résumé fourni par la source

Time-resolved IR spectra of a di-iridium isocyanide-bridged complex measured after 630-nm impulsive electronic excitation exhibit a strong band at 2140 cm–1 due to a CN stretching vibration. Signal intensities at its low- as well as high-frequency sides oscillate with the frequencies of the Ir–Ir stretching and, at a certain wavenumber ranges, torsional vibrations (120 and 70 cm–1, respectively). The most prominent oscillatory feature occurred around 2020 cm–1, changing its intensity as well as position periodically. All oscillations vanished within 4-5 ps. The CN band maximum showed much weaker oscillations superimposed on a long-lived (70 ps) signal. The oscillatory TRIR behavior is attributed to coupling between coherently excited low-frequency skeletal and high-frequency ligand vibrations in the electronic excited state giving rise to difference and sum combination modes. Occurrence of coherent effects in TRIR spectra is interpreted using Feynman diagrams describing interactions with optical-pump and IR-probe fields.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.