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Creators/Authors contains: "Zhu, Zhaoguo"

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  1. ; ; ; ; ; ; ; ; (, Journal of the American Chemical Society)
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  2. ; ; ; ; (, Journal of the American Society for Mass Spectrometry)
    Antioxidants play important roles in eliminating reactive oxygen species (ROS), which have been associated with various degenerative diseases, such as cancer, aging, and inflammatory diseases. Gallic acid (GA) and propyl gallate (PG) are well-known antioxidants and have been widely studied in vitro and in vivo. The biological antioxidant abilities of GA and PG are related to the electronic structure of their dehydro-radicals. In this work, we report a combined photoelectron spectroscopic and computational study of the deprotonated gallic acid anion, [GA – H]−, and deprotonated propyl gallate anion, [PG – H]−. Adiabatic electron affinities of the dehydro-gallic acid radical, [GA – H]· and of the dehydro-propyl gallate radical, [PG – H]·, are measured to be 2.90 ± 0.05 eV and 2.85 ± 0.05 eV, respectively, and compared to computational results. 
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  3. ; ; ; ; (, The Journal of Physical Chemistry A)
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  4. ; ; ; ; ; (, Physical Chemistry Chemical Physics)
    The metallo-formate anions, M(CO 2 ) − , M = Ni, Pd, and Pt, were formed by electron-induced CO 2 activation. They were generated by laser vaporization and characterized by a combination of mass spectrometry, anion photoelectron spectroscopy, and theoretical calculations. While neutral transition metal atoms are normally unable to activate CO 2 , the addition of an excess electron to these systems led to the formation of chemisorbed anionic complexes. These are covalently bound, formate-like anions, in which their CO 2 moieties are significantly reduced. In addition, we also found evidence for an unexpectedly attractive interaction between neutral Pd atoms and CO 2 . 
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  5. ; ; ; ; ; ; ; ; ; ; et al (, Journal of the American Chemical Society)
  6. ; ; ; ; ; (, Angewandte Chemie International Edition)
    Abstract Mass spectrometric analysis of the anionic products of interaction between platinum atomic anions, Pt−, and methane, CH4and CD4, in a collision cell shows the preferred generation of [PtCH4]−and [PtCD4]−complexes and a low tendency toward dehydrogenation. [PtCH4]−is shown to be H−Pt−CH3−by a synergy between anion photoelectron spectroscopy and quantum chemical calculations, implying the rupture of a single C−H bond. The calculated reaction pathway accounts for the observed selective activation of methane by Pt−. This study presents the first example of methane activation by a single atomic anion. 
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