Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 138, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4774268
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [FOR 1282 MO719/10-1, BO3169/1-1]
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We investigated the changes in electronic structures induced by chemical functionalization of the five smallest diamondoids using valence photoelectron spectroscopy. Through the variation of three parameters, namely functional group (thiol, hydroxy, and amino), host cluster size (adamantane, diamantane, triamantane, [121]tetramantane, and [1(2,3)4]pentamantane), and functionalization site (apical and medial) we are able to determine to what degree these affect the electronic structures of the overall systems. We show that unlike, for example, in the case of halobenzenes, the ionization potential does not show a linear dependence on the electronegativity of the functional group. Instead, a linear correlation exists between the HOMO-1 ionization potential and the functional group electronegativity. This is due to localization of the HOMO on the functional group and the HOMO-1 on the diamondoid cage. Density functional theory supports our interpretations. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4774268]
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