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The IR and UV absorption spectra of CO 2 + isolated in solid neon were studied by using our newly built mass-selective matrix isolation system. The IR absorption spectrum revealed the formation of CO2 in both cationic and anionic forms in solid Ne, since neutral CO2 was also used to serve as an electron scavenger in this study. Subsequently, we recorded the UV absorption spectrum of the same matrix sample in the spectral region 270−400 nm, encompassing the electronic transitions of CO 2 + from the ground state to the first two electronic excited states. Notably, the observation of the electronic transition A 2 Π u ← X 2 Π g was dominated by the vibrational progression of the symmetric CO stretching mode, while a single sharp band was observed in the electronic transition B 2 Σ u + ← X 2 Π g. The presented spectra might be useful for future studies on terrestrial and astrochemical conjunctions. [ABSTRACT FROM AUTHOR]

Phenoxide anions (PhO−) and phenoxy radicals (PhO) were generated by the electron bombardment of a phenol/argon sample during matrix deposition. Further irradiation of the matrix sample at 365 nm led to the detachment of the electron from PhO− and afforded its neutral counterpart PhO in solid Ar. In a separate experiment, the photolysis of a phenol/Ar matrix at 160 nm mainly afforded PhO, phenyl (Ph) radicals, and various open‐chain ketenes, but no PhO−. The Infrared (IR) lines of PhO− were assigned on the basis of the observed photochemical behaviors and the prediction of the vibrational wavenumbers with the corresponding IR intensities predicted by the B3LYP/aug‐cc‐pVTZ theory. [ABSTRACT FROM AUTHOR]

• Mass-selected aniline cations in solid Ne. • UV–visible absorption spectra of aniline cations. • Franck-Condon simulation (B ← X) of aniline cations. Absorption spectrum of the electronic transition B 2B 1 ← X 2B 1 of aniline cation isolated in solid Ne at 3 K was recorded by using the newly-built mass-selective matrix isolation system. The observed broad vibronic transitions spanning between 23,000−28,000 cm−1 were assigned by the aid of quantum chemical calculations and Franck-Condon simulation. Quantum chemical calculations indicated noticeable changes in geometry between the ground state and the B state. This structural alteration activates low-frequency vibrational modes in combination with other vibrational modes, resulting in the broad appearance of this electronic transition. [Display omitted] [ABSTRACT FROM AUTHOR]