Resonance Raman spectra of polyyne molecules C10H2 and C12H2 in solution

Tomonari Wakabayashi*, Hiroshi Tabata, Tatsuya Doi, Hiroyuki Nagayama, Koji Okuda, Rui Umeda, Ichiro Hisaki, Motohiro Sonoda, Tobe Yoshito, Toshie Minematsu, Kenro Hashimoto, Shinji Hayashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Resonance Raman spectra of hydrogen-capped linear carbon molecules, polyynes H(-C {triple bond, long} C-)nH (n = 5,6), were measured in n-hexane. For C10H2, the peaks at 2123 cm-1 and 2017 cm-1 were identified as the ν3g) and ν4g) modes in D∞h symmetry, respectively. For C12H2, the peaks of ν3g) at 2097 cm-1 and ν4g) at 2053 cm-1 were identified. The relative intensities of the first-order Stokes lines and their resonance enhancement are discussed in terms of the Franck-Condon overlap and resonance absorption relevant to the fully-allowed electronic transition of 1 Σu+ ↔ over(X, ∼)1 Σg+.

Original languageEnglish
Pages (from-to)296-300
Number of pages5
JournalChemical Physics Letters
Issue number4-6
StatePublished - 12 Jan 2007

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