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Observation of biradical spin coupling through hydrogen bonds
- Publication Year :
- 2022
-
Abstract
- Investigation of intermolecular electron spin interaction is of fundamental importance in both science and technology.Here, radical pairs of all-trans retinoic acid molecules on Au(111) are created using an ultra-low temperature scanning tunneling microscope. Antiferromagnetic coupling between two radicals is identified by magnetic-field dependent spectroscopy.The measured exchange energies are from 0.1 to 1.0 meV. The biradical spin coupling is mediated through O-H$\cdots$O hydrogen bonds, as elucidated from analysis combining density functional theory calculation and a modern version of valence bond theory.<br />Comment: 10 pages with supplemental materials, PRL accepted
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2205.02173
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.128.236401