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J Phys Chem A. 2014 Sep 18;118(37):8158-62. doi: 10.1021/jp500678n. Epub 2014 Feb 25.

Alanate anion, AlH4(-): photoelectron spectrum and computations.

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Department of Chemistry, Johns Hopkins University , Baltimore, Maryland 21218, United States.


The alanate anion, AlH4(-), was generated in the gas phase using a pulsed arc cluster ionization source. Its photoelectron spectrum was then measured with 193 nm photons. The spectrum consists of a broad feature, spanning electron binding energies from 3.8 eV to over 5.3 eV. This band reflects the photodetachment transitions between the ground state of the AlH4(-) anion and the ground state of its thermodynamically unstable neutral counterpart, AlH4. The vertical detachment energy (VDE) of AlH4(-) was measured to be 4.4 eV. Additionally, VDE values were also computed in a comprehensive theoretical study and compared both with the previously computed value and with our experimentally determined value.


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