Metal phthalocyanines, a highly versatile class of aromatic, planar, macrocyclic molecules with a chelated central metal ion, are topical objects of ongoing research and particularly interesting due to their magnetic properties. However, while the current focus lies almost exclusively on spin-Zeeman-related effects, the high symmetry of the molecule and its circular shape suggests the exploitation of light-induced excitation of 2-fold degenerate vibrational states in order to generate, switch, and manipulate magnetic fields at the nanoscale. The underlying mechanism is a molecular pseudorotation that can be triggered by infrared pulses and gives rise to a quantized, small, but controllable magnetic dipole moment. We investigate the optical stimulation of vibrationally induced molecular magnetism and estimate changes in the magnetic shielding constants for confirmation by future experiments.

中文翻译：

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酞菁分子赝旋转作为纳米尺度磁场控制的工具


金属酞菁是一类高度通用的芳香族平面大环分子，具有螯合的中心金属离子，是正在进行的研究的热门对象，并且由于其磁性而特别令人感兴趣。然而，虽然目前的焦点几乎完全集中在自旋塞曼相关效应上，但分子的高度对称性及其圆形形状表明，利用光诱导激发 2 倍简并振动态来生成、切换和在纳米尺度上操纵磁场。其基本机制是分子赝旋转，可以由红外脉冲触发，并产生量化的、小但可控的磁偶极矩。我们研究了振动引起的分子磁性的光刺激，并估计了磁屏蔽常数的变化，以便通过未来的实验进行确认。