Isomer-Selective Generation and Spectroscopic Characterization of Picolyl Radicals
| Autor: | Philipp Constantinidis, Ingo Fischer, Engelbert Reusch, Fabian Holzmeier, Patrick Hemberger |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Astrochemistry
Chemistry Radical Deamination Synchrotron radiation 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Ring (chemistry) Photochemistry 01 natural sciences Catalysis Spectral line 0104 chemical sciences Ionization energy 0210 nano-technology Pyrolysis |
| Zdroj: | Angewandte Chemie International Edition. 56:8000-8003 |
| ISSN: | 1433-7851 |
| DOI: | 10.1002/anie.201703433 |
| Popis: | Nitrogen-containing resonance-stabilized radicals like picolyl are important in combustion chemistry and astrochemistry. They have only been scarcely studied, because an isomer-selective generation is often difficult. Here we present threshold photoelectron spectra of three picolyl radical isomers, C6H6N, using synchrotron radiation. The radicals were selectively generated by flash pyrolysis from aminomethylpyridine precursors via deamination. Ionization energies of 7.70 eV, 7.59 eV and 8.01 eV are determined for 2-, 3- and 4-picolyl, respectively. Vibrational structure is observed and assigned to an in-plane deformation mode of the aromatic ring. The spectroscopic insight gained in this study, permits to distinguish different picolyl isomers in e. g. online combustion analysis. |
| Databáze: | OpenAIRE |
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