Measuring Charge Distribution of Molecular Cations by an Atomic Coulomb Probe Microscope

doi:10.1088/0256-307X/39/11/113301

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Abstract：Imaging the charge distributions and structures of molecules and clusters will promote the understanding of the dynamics of the quantum system. Here, we report a method by using an Ar atom as a tip to probe the charge distributions of benzene (Bz) cations in gas phase. Remarkably, the measured charge distributions of Bz$^{+}$ ($\delta_{_{\scriptstyle \rm H}}=0.204$, $\delta_{_{\scriptstyle \rm C}}=-0.037$) and Bz$ ^{2+}$ ($\delta_{_{\scriptstyle \rm H}}=0.248$, $\delta_{_{\scriptstyle \rm C}}=0.0853$) agree well with the calculated Mulliken distributions, and the structures of Bz$_{2}$ is reconstructed by using the measured charge distributions. The structures of two Bz$_{2}$ isomers (T-shaped and PD isomers) can be resolved from the measured inter-molecular potential $V(R)$ between two Bz ions, and the structures of Bz dimer agree well with the theoretical predictions.

收稿日期: 2022-08-20 Editors' Suggestion 出版日期: 2022-10-19

:	33.80.-h
	33.80.Gj	(Diffuse spectra; predissociation, photodissociation)
	34.20.Gj	(Intermolecular and atom-molecule potentials and forces)
	36.40.Mr	(Spectroscopy and geometrical structure of clusters)

引用本文:

. [J]. 中国物理快报, 2022, 39(11): 113301-.
Xitao Yu, Xiaoqing Hu, Jiaqi Zhou, Xinyu Zhang, Xinning Zhao, Shaokui Jia, Xiaorui Xue, Dianxiang Ren, Xiaokai Li, Yong Wu, Xueguang Ren, Sizuo Luo, and Dajun Ding. Measuring Charge Distribution of Molecular Cations by an Atomic Coulomb Probe Microscope. Chin. Phys. Lett., 2022, 39(11): 113301-.

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https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/39/11/113301 或 https://cpl.iphy.ac.cn/CN/Y2022/V39/I11/113301

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