Scholarlink

<p>Chalcogenide radical cations [R<sub>2</sub>E]<sup>•+</sup> (E = S, Se, Te) are commonly short-lived intermediates of fundamental interest. Sulfide radical cations in particular are associated in vivo with oxidative stress and neuropathological processes. Having succeeded in the preparation of <i>meta</i>-terphenyl-based dichalcogenide radical cations [R<sub>2</sub>E<sub>2</sub>]<sup>•+</sup> (E = S, Se, Te), and a telluride analogue [R<sub>2</sub>Te]<sup>•+</sup> in the past, we aimed to complete the series regarding sulfur and selenium. Here we report on the single-electron oxidation of diarylchalcogenides M<sup>S</sup>FluindPhE (E = S, Se, Te; M<sup>S</sup>Fluind = dispiro[fluorene-9,3’-(1’,1’,7’,7’-tetramethyl-<i>s</i>-hydrindacen-4’-yl)-5’,9”-fluorene]) using XeF<sub>2</sub> in the presence of K[B(C<sub>6</sub>F<sub>5</sub>)<sub>4</sub>], which afforded deeply coloured and isolable radical cation salts [M<sup>S</sup>FluindPhE][B(C<sub>6</sub>F<sub>5</sub>)<sub>4</sub>] (E = S, Se, Te). Structural and electronic properties were characterised by electron paramagnetic spectroscopy, cyclic voltammetry, optical absorption spectroscopy and single crystal X-ray diffraction (E = Se, Te), combined with extensive quantum mechanical computations.</p><p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Isolation of kinetically-stabilised diarylchalcogenide radical cations

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月9日

查看全文
  • Pascal Komorr,
  • Corina Stoian,
  • Aleksa Radović,
  • Björn A. Meyer,
  • Pim Puylaert,
  • George E. Cutsail III,
  • Emanuel Hupf,
  • Jens Beckmann

摘要

Chalcogenide radical cations [R2E]•+ (E = S, Se, Te) are commonly short-lived intermediates of fundamental interest. Sulfide radical cations in particular are associated in vivo with oxidative stress and neuropathological processes. Having succeeded in the preparation of meta-terphenyl-based dichalcogenide radical cations [R2E2]•+ (E = S, Se, Te), and a telluride analogue [R2Te]•+ in the past, we aimed to complete the series regarding sulfur and selenium. Here we report on the single-electron oxidation of diarylchalcogenides MSFluindPhE (E = S, Se, Te; MSFluind = dispiro[fluorene-9,3’-(1’,1’,7’,7’-tetramethyl-s-hydrindacen-4’-yl)-5’,9”-fluorene]) using XeF2 in the presence of K[B(C6F5)4], which afforded deeply coloured and isolable radical cation salts [MSFluindPhE][B(C6F5)4] (E = S, Se, Te). Structural and electronic properties were characterised by electron paramagnetic spectroscopy, cyclic voltammetry, optical absorption spectroscopy and single crystal X-ray diffraction (E = Se, Te), combined with extensive quantum mechanical computations.