Metal-Metal Bond Formations in [Au(CN) 2 - ] n (n = 3-5) Oligomers in Water Identified by Coherent Nuclear Wavepacket Motions

Munetaka Iwamura*, Kenshi Kimoto, Koichi Nozaki, Hikaru Kuramochi, Satoshi Takeuchi, Tahei Tahara

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Large oligomers of [Au(CN) 2 - ] n including the pentamer were favorably formed in an aqueous solution containing tetra-ethylammonium chloride (1.0 mol/dm 3 ), and intense transient absorption in the visible region was recorded by selective photoexcitation of the oligomers. Distinct oscillations at ∼40-100 cm -1 were clearly observed in the temporal profile of the excited-state absorption signal, and the frequency-wavelength two-dimensional analysis of the oscillation clearly distinguishes the coherent nuclear motion of different oligomers. The observed nuclear motions were assigned to Au-Au stretch vibrations in the trimer, tetramer, and pentamer induced by the bond formation in the excited states. The transient absorption exhibits significant changes with a time constant of 3-20 ps, reflecting intersystem crossing and structural change.

Original languageEnglish
Pages (from-to)7085-7089
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume9
Issue number24
DOIs
StatePublished - 2018/12/20

ASJC Scopus subject areas

  • General Materials Science
  • Physical and Theoretical Chemistry

Fingerprint

Dive into the research topics of 'Metal-Metal Bond Formations in [Au(CN) 2 - ] n (n = 3-5) Oligomers in Water Identified by Coherent Nuclear Wavepacket Motions'. Together they form a unique fingerprint.

Cite this