The schematic diagram of a linear tandem time-of-flight mass spectrometer employed for the photofragmentation studies.
The time-of-flight mass spectra for (a) and (b) clusters produced by two-photon ionization at . The inset shows a full mass distribution for clusters.
Dissociation ratio of clusters as a function of , where and are the ion intensities of daughter and parent ions, respectively. The inset shows the decay time of clusters as a function of .
(Color online) The optimized structures for the most stable isomers of clusters.
The difference photofragmentation mass spectra (laser on–laser off) for at various photon energies. At all photon energies, the mass peak corresponding to ion, which is a product of the decomposition of aniline ring, is not detected.
The average number of water molecules ejected as a function of photon energy for . The inverse of the slope gives the average binding of water molecules. The inset shows the linear response of the fragment ion intensity to the laser fluence at .
The average number of water molecules ejected as a function of photon energy for clusters. For , bound water molecules run out as photon energy increases. For , the plots are quite linear.
The difference photofragmentation mass spectra (laser on–laser off) for at . The inset shows the average number of water molecules ejected as a function of cluster size at three photon energies.
The average binding energy of water molecules for vs cluster size. The inset shows that the relative internal energy decreases with cluster size .
The branching ratios of photofragments vs photon energy for (a) and (b) . All the plots for each fragment ions fit the Gaussian function.
DFT-calculated absolute energy of .
DFT-calculated binding energy of and .
Average number of ejected solvent molecules for and at three different wavelengths.
Average number of survived water molecules after photofragmentation for .
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