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 due 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 dimer 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.
| Original language | English |
|---|---|
| Pages (from-to) | 303-307 |
| Number of pages | 5 |
| Journal | European Physical Journal D |
| Volume | 9 |
| Issue number | 1-4 |
| Publication status | Published - 1999 Dec |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
Cite this
Photoelectron spectroscopy of 7-azaindole-water cluster anions. / Nakajima, Atsushi; Negishi, Y.; Hasumi, R.; Kaya, K.
In: European Physical Journal D, Vol. 9, No. 1-4, 12.1999, p. 303-307.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Photoelectron spectroscopy of 7-azaindole-water cluster anions
AU - Nakajima, Atsushi
AU - Negishi, Y.
AU - Hasumi, R.
AU - Kaya, K.
PY - 1999/12
Y1 - 1999/12
N2 - 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 due 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 dimer 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.
AB - 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 due 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 dimer 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.
UR - http://www.scopus.com/inward/record.url?scp=0033426883&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033426883&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0033426883
VL - 9
SP - 303
EP - 307
JO - European Physical Journal D
JF - European Physical Journal D
SN - 1434-6060
IS - 1-4
ER -