2026-05-27T05:32:20Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/364792026-02-03T11:05:31Zcom_10630_2254col_10630_37953

Shen, Yi Xue, Guodong Dai, Yasi Moles Quintero, Sergio Chen, Hanjiao Wang, Dongsheng Miao, Fang Negri, Fabrizia Zheng, Yonghao Casado-Cordón, Juan 2025-01-17T10:53:58Z 2025-01-17T10:53:58Z 2021-10-19 Shen, Y., Xue, G., Dai, Y. et al. Normal & reversed spin mobility in a diradical by electron-vibration coupling. Nat Commun 12, 6262 (2021). https://doi.org/10.1038/s41467-021-26368-8 https://hdl.handle.net/10630/36479 10.1038/s41467-021-26368-8 π−conjugated radicals have great promise for use in organic spintronics, however, the mechanisms of spin relaxation and mobility related to radical structural flexibility remain unexplored. Here, we describe a dumbbell shape azobenzene diradical and correlate its solid-state flexibility with spin relaxation and mobility. We employ a combination of X-ray diffraction and Raman spectroscopy to determine the molecular changes with temperature. Heating leads to: i) a modulation of the spin distribution; and ii) a “normal” quinoidal → aromatic transformation at low temperatures driven by the intramolecular rotational vibrations of the azobenzene core and a “reversed” aromatic → quinoidal change at high temperatures activated by an azobenzene bicycle pedal motion amplified by anisotropic intermolecular interactions. Thermal excitation of these vibrational states modulates the diradical electronic and spin structures featuring vibronic coupling mechanisms that might be relevant for future design of high spin organic molecules with tunable magnetic properties for solid state spintronics. eng http://creativecommons.org/licenses/by/4.0/ open access Attribution 4.0 Internacional Reactividad (Química) Radicales (Química) Normal & reversed spin mobility in a diradical by electron-vibration coupling journal article