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Infrared Spectroscopy of Imidazole Trimer in Helium Nanodroplets: Free NH Stretch Mode
- Authors
- Lee, Seulki; Lee, Seung Jun; Ahn, Ahreum; Kim, Yusic; Min, Ahreum; Choi, Myong Yong; Miller, Roger E.
- Issue Date
- Mar-2011
- Publisher
- 대한화학회
- Keywords
- Superfluid helium nanodroplets; Imidazole trimer; Density functional theory (DFT) calculations; Vibrational transition moment angles (VTMAs)
- Citation
- Bulletin of the Korean Chemical Society, v.32, no.3, pp 885 - 888
- Pages
- 4
- Indexed
- SCI
SCIE
SCOPUS
KCI
- Journal Title
- Bulletin of the Korean Chemical Society
- Volume
- 32
- Number
- 3
- Start Page
- 885
- End Page
- 888
- ISSN
- 0253-2964
1229-5949
- Abstract
- We report the first vibrational band assignment of imidazole trimer (IMT) solvated in helium nanodroplets. Several congested vibrational bands of imidazole (IM) clusters were obtained in the frequency region of 3513-3515 cm(-1) and vibrationally resolved due to the extremely low temperature (0.37 K) and very weak solute-solvent interaction environments of helium droplets. The unambiguous free NH band assignment was achieved with an aid of pick-up oven temperature dependence and vibrational transition moment angle (VTMA) experiments as well as density functional theory (DFT) calculations. The band at 3514.3 cm(-1) is attributed to the free NH stretching mode of linear IMT clusters, easily formed by the dipole-dipole interactions of IM in ultracold helium nanodroplets.
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