UV spectra of iron-doped carbon clusters FeC_n n = 3-6

Mathias Steglich; Xiaojing Chen; Anatoly Johnson; John P. Maier

doi:10.1016/j.ijms.2014.02.006

paper

UV spectra of iron-doped carbon clusters FeC_n n = 3-6

arXiv:1502.05310 · doi:10.1016/j.ijms.2014.02.006

Abstract

Electronic transitions of jet-cooled FeC $_{n}$ clusters ( $n = 3 - 6$ ) were measured between 230 and 300 nm by a mass-resolved 1+1 resonant two-photon ionization technique. Rotational profiles were simulated based on previous calculations of ground state geometries and compared to experimental observations. Reasonable agreement is found for the planar fan-like structure of FeC $_{3}$ . The FeC $_{4}$ data indicate a shorter distance between the Fe atom and the bent C $_{4}$ unit of the fan. The transitions are suggested to be $^{3}$ A $_{2} \leftarrow^{3}$ B $_{1}$ for FeC $_{3}$ and $^{5}$ A $_{1} \leftarrow^{5}$ A $_{1}$ for FeC $_{4}$ . In contrast to the predicted C $_{\infty v}$ geometry, non-linear FeC $_{5}$ is apparently observed. Line width broadening prevents analysis of the FeC $_{6}$ spectrum.

6 pages, 5 figures