Precise Control of Pi-electron Magnetism in Metal-free Porphyrins,Journal of the American Chemical Society

当前位置： X-MOL 学术 › J. Am. Chem. Soc. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Precise Control of Pi-electron Magnetism in Metal-free Porphyrins
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-09-22 , DOI: 10.1021/jacs.0c07791
Yan Zhao ₁ , Kaiyue Jiang ₂ , Can Li ₁ , Yufeng Liu ₁ , Chengyang Xu ₁ , Wenna Zheng ₁ , Dandan Guan _{1,

3,

4} , Yaoyi Li _{1,

3,

4} , Hao Zheng _{1,

3,

4} , Canhua Liu _{1,

3,

4} , Weidong Luo _{1,

5} , Jinfeng Jia _{1,

3,

4} , Xiaodong Zhuang ₂ , Shiyong Wang _{1,

3,

4}

Affiliation

The porphyrin macrocycle can stabilize a set of magnetic metal ions, thus introducing localized net spins near the center. However, it remains elusive but most desirable to introduce delocalized spins in porphyrins with wide implications, for example, for building correlated quantum spins. Here, we demonstrate that metal-free porphyrins host delocalized pi-electron magnetism as revealed by scanning probe microscopy and different level of theory calculations. Our results demonstrate that engineering of -electron topologies introduces spin polarized singlet state and delocalized net spins in metal-free porphyrins. In addition, the pi-electron magnetism can be switched on/off via STM manipulation by tunning the interfacial charge transfer. Our results provide an effective way to precisely control the pi-electron magnetism in metal-free porphyrins, which can be further extended to design new magnetic functionalities of porphyrin-based architectures.

中文翻译：

无金属卟啉中π电子磁性的精确控制

卟啉大环可以稳定一组磁性金属离子，从而在中心附近引入局部净自旋。然而，在具有广泛意义的卟啉中引入离域自旋仍然是难以捉摸但最理想的，例如，用于构建相关的量子自旋。在这里，我们证明了无金属卟啉承载离域 pi 电子磁性，如扫描探针显微镜和不同水平的理论计算所揭示的。我们的结果表明，π 电子拓扑的工程在无金属卟啉中引入了自旋极化单线态和离域净自旋。此外，可以通过 STM 操作通过调整界面电荷转移来打开/关闭 pi 电子磁性。我们的结果为精确控制无金属卟啉中的π电子磁性提供了一种有效的方法，

更新日期：2020-09-22

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11