Photoelectron spectroscopy of 7-azaindole—water cluster anions
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.
PACS36.40.−c Atomic and molecular clusters 82.30.Nr Association, addition, insertion, cluster formation, hydrogen bonding 71.24.+q Electronic structure of clusters and nanoparticles
Unable to display preview. Download preview PDF.
- 1.P. Schuster, G. Zundel, C. Sandorfy (Eds.): The Hydrogen Bonding Theory and Experiments ( North-Holland, New York 1976 )Google Scholar
- 3.C.R. Cantor, P.R. Schimmel: Biophysical Chemistry I ( Freeman, San Francisco 1980 )Google Scholar
- 12.K. Puke, K. Kaya: J. Phys. Chem. 93, 64 (1989)Google Scholar
- 14.P.-T. Chou, H. Wen-Chi, C.-P. Chang, K. Meng-Shin: J. Phys. Chem. 99, 11 994 (1995)Google Scholar
- 17.L. Yu, S.C. Foster, J.M. Williamson, T.A. J. Chem. Phys, 92, 5794 (1990)Google Scholar
- 28.A.J. Gotch, T.S. Zwier: J. Chem. Phys. 96, 3, 388 (1992)Google Scholar