生化分子質譜與光譜學實驗室 Laboratory for Mass Spectrometric and Spectroscopic Studies of Biomolecules

Our research findings:

The adiabatic ionization energy of di-substituted benzene derivatives has a "MOP" propensity.

"MOP" propensity: meta > ortho > para (MOP)

o-, m-, p-dimethoxybenzene

ionization energy: m-dimethoxybenzene (I) (64491 cm−1) > m-dimethoxybenzene (II) (63758 cm−1) > m-dimethoxybenzene (III) (63523 cm−1) > o-dimethoxybenzene (61617 cm−1) > trans-p-dimethoxybenzene (60772 cm−1)> cis-p-dimethoxybenzene (60563 cm−1) “Mass-analyzed threshold ionization spectroscopy of the selected rotamers of hydroquinone and p-dimethoxybenzene cations”, J. L. Lin, L. C.  L. Huang, and W. B. Tzeng, J. Phys. Chem. A 105, 11455–11461 (2001). “Rotamers of o- and m-dimethoxybenzenes studied by mass-analyzed threshold ionization spectroscopy and theoretical calculations”, Shih Chang Yang, Ssu Wei Huang, and Wen Bih Tzeng,  J. Phys. Chem. A. 114, 11144–11152 (2010).

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背景音樂：給愛麗絲 (貝多芬)