PMID: 11605277Oct 19, 2001Paper

Electronic spectroscopy and excited state dynamics of the Al-H2/D2 complex

Faraday Discussions
X TanM H Alexander

Abstract

The electronic spectra of the Al-H2 and Al-D2 complexes are investigated in a collaborative experimental and theoretical study. The complexes were prepared in a pulsed supersonic beam and detected with laser fluorescence excitation spectroscopy. Transitions to bound vibrational levels in electronic states correlating with the excited-state Al(3d, 4p, 4d) + H2/D2 asymptotes were observed by monitoring emission from lower excited Al atomic levels, formed in the non-radiative decay of the excited complex. Fluorescence depletion has also been used to verify that the observed Al-H2 bands all involve the same molecular carrier. The bands have been assigned to the more strongly bound Al-oH2 and Al-pD2 nuclear spin modifications. In contrast to our previous observations for Al(5s)-H2 [X. Yang and P. J. Dagdigian, J. Chem. Phys., 1998, 109, 8920], for which only one potential energy surface (PES) emanates from the dissociation asymptote, the Lorentzian widths of the different vibrational bands in the 3d, 4p, 4d<--3p transitions vary widely, in some cases allowing resolution of the rotational structure of the bands. With the help of the calculated Al(3p)-oH2/pD2 dissociation energies, binding energies of the observed excited vibronic lev...Continue Reading

Citations

Nov 10, 2014·The Journal of Chemical Physics·Qianli MaPaul J Dagdigian
Aug 4, 2015·The Journal of Chemical Physics·Qianli MaPaul J Dagdigian
Nov 18, 2020·Physical Chemistry Chemical Physics : PCCP·Shijie ChaiYongqing Li

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