In:
The Journal of Chemical Physics, AIP Publishing, Vol. 118, No. 11 ( 2003-03-15), p. 4929-4937
Abstract:
We have applied two-color resonant two-photon mass analyzed threshold ionization spectroscopy to investigate some ionic properties of N-alkylanilines. The respective adiabatic ionization energies of N-methylaniline (NMA), N-ethylaniline (NEA), and N,N-dimethylaniline (DMA) are determined to be 59 822, 59 204, and 58 018 cm−1 with an uncertainty of about 5 cm−1. This indicates that the longer alkyl chain gives rise to a larger redshift in the IE due to a stronger interaction between the alkyl group and the nitrogen atom in the ionic state. Because the alkyl group gives rise to an increase in the electron density around the nitrogen atom of the neutral species, the IE of DMA is lower than that of NMA. In addition, the N-alkyl substitution also influences the frequency of the internal motion of the cations. However, the frequency variation is dependent upon the vibrational pattern and the extent of the coupling between the N-alkyl group and ring vibrations.
Type of Medium:
Online Resource
ISSN:
0021-9606
,
1089-7690
Language:
English
Publisher:
AIP Publishing
Publication Date:
2003
detail.hit.zdb_id:
3113-6
detail.hit.zdb_id:
1473050-9
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