## Abstract

The absorption spectrum of pyridine in rare gas matrices was studied by us in the spectral region extending from 1700 Å to 2900 Å. The main results show:. (a) The 2900 Å (n → π^{*}) transition is similar to the corresponding gas phase transition. Only one n → π^{*} transition is observed. (b) In the absorption spectrum of the first π → π^{*} transition (^{1}a_{1g} → ^{1}B_{2u} in benzene symmetry) progressions are found with intervals of 900 cm^{-1} (ν_{2}) starting at the origin and at a distance of 500 cm^{-1} (ν_{18}), and of 300 cm^{-1} from the origin. (c) Two progressions were observed for the second π → π^{*} transition, (^{1}A_{1g} → ^{1}B_{1u} in benzene symmetry) and intervals being 900 cm^{-1} (ν_{2}) starting at the origin and at 500 cm^{-1} (ν_{18}) from the origin. (d) One progression of 900 cm^{-1} (ν_{2}) was observed for the thirdπ → π^{*} transition (^{1}A_{1g} → ^{1}F_{1u} in benzene symmetry). The spectrum represents no evidence for the splitting of the ^{1}E_{1u} state. (e) The transition to the ^{1}E_{2g} state (in benzene symmetry) was not observed.

Original language | English |
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Pages (from-to) | 237-241 |

Number of pages | 5 |

Journal | Chemical Physics |

Volume | 17 |

Issue number | 2 |

DOIs | |

State | Published - 15 Oct 1976 |