Resonant two-photon ionization and mass-analyzed threshold ionization spectroscopy of the selected rotamers of m-methoxyaniline and o-methoxyaniline

Rotamers of m-chloroanisole studied by two-color resonant two-photon mass-analyzed threshold ionization spectroscopy

“…The difference in the transition energies of the two rotamers results from different interactions between the two substituents in various energy states. Similar findings have been reported for m-fluoroanisole [27], m-aminophenol [34], m-methoxyaniline [25], and mcresol [35].…”

“…The band origins of the S 1 S 0 electronic transition (E 1 's) of these two isotopologues are found to be the same within the present detection limit. Similar to those reported previously for the rotamers of m-aminophenol [34], m-fluoroanisole [27], m-methoxyaniline [25], and m-cresol [35], the vibronic bands appear in two series which are built on 35,822 ± 2 and 35,868 ± 2 cm À1 corresponding to the E 1 's of cisand trans-m-chloroanisole, respectively. Table 1 lists the observed vibronic bands of the 35 Cl and 37 Cl isotopologues of m-chloroanisole.…”

“…achieved by comparing these data with those of anisole [24], mmethoxyaniline [25], m-fluoroanisole [27], and m-dimethoxybenzene [36], and the predicted values from the CIS/6-311G(d,p) calculations. The numbering system of the normal vibrations follows that used by Varsanyi [37] for benzene derivatives and is based on Wilson's notations [38].…”

“…Comparing these new data with those of anisole [24] and its derivatives [25][26][27][28], we can learn the chlorine substitution effect on the transition energy and molecular vibrations.…”

Development of Multiphoton Ionization Time-of-Flight Mass Spectrometry for the Detection of Small Emulsion Droplets

“…MPI-TOFMS has characteristics such as high selectivity and robustness [14,15] that make it suitable for the analysis of emulsions with inherently high concentrations of each constituent. MPI-TOFMS is normally applied to the detection of a gas sample [15][16][17]. In combination with gas chromatography (GC), this method can be applied to the comprehensive trace analysis of complex environmental samples [18][19][20][21].…”