Abstract
The 7-azaindole (7-AzI) cluster anions and their H2O adducts were generated by electron attachment to the 7-AzI/7-AzI-H2O clusters, and their electronic properties studied with mass spectrometry and photoelectron spectroscopy. In the mass spectra of the 7-AzI cluster anions, (7-AzI) − n , monomer anions were missing clue to negative electron affinity (EA), while clusters (n ≥ 2) have positive EA, and those having even n were more abundant than those at odd n. EA increased with cluster size from 0.88 eV at n = 2, and an even-odd alternation in the EA was seen. The even-odd alternation showed that the 7-AzI dirtier acts as a unit for cluster formation. In the photoelectron spectrum of (7-AzI) −2 at 266 nm, the second peak was observed 2,4 eV above the first peak; this is attributed to the triplet state of the neutral (7-AzI)2 Depending on the detachment energy, a movable peak, with the detachment of 420–300 nm (2.9–4.1 eV), was additionally observed between the first and the second peaks; this was thought to be caused by a delayed photoemission via an electronic excited state of the (7-AzI) −2 anion.
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Nakajima, A., Negishi, Y., Hasurni, R., Kaya, K. (1999). Photoelectron spectroscopy of 7-azaindole—water cluster anions. In: Châtelain, A., Bonard, JM. (eds) The European Physical Journal D. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-88188-6_57
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DOI: https://doi.org/10.1007/978-3-642-88188-6_57
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