Observation of slow magnetic relaxation phenomena in spatially isolated π-radical ions. Issue 7 (7th February 2023)

• Record Type: Journal Article
• Authors: Koyama, Shohei; Sato, Kazunobu; Yamashita, Masahiro; Sakamoto, Ryota; Iguchi, Hiroaki
• Is Part Of: Physical chemistry chemical physics. Volume 25:Issue 7(2023)
• Page Start: 5459
• Page End: 5467
• Publication Date: 2023-02-07
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d2cp06026d
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : AC susceptibility measurements in the crystalline state and pulsed ESR measurements in the solution state provide insight into the relaxation of π-conjugated radical ions. Abstract : The use of molecular spins as quantum bits is fascinating because it offers a wide range of strategies through chemical modifications. In this regard, it is very interesting to search for organic radical ions that have small spin–orbit coupling values. On the other hand, the feature of the magnetic relaxation of π-organic radical ions is rarely exploited due to the difficulty of spin dilution, and π-stacking interaction. In this study, we focus on N, N ′, N ′′-tris(2, 6-dimethylphenyl)benzenetriimide (BTI-xy), where three xylene moieties connected to the imide groups cover the π-plane of the BTI core. As a result, BTI-xy radical anions without π-stacking interaction were obtained. This led to the slow magnetization relaxation, which is reported for the first time in organic radicals. Furthermore, the relaxation times in a solution state revealed the importance of spin interaction.