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Abstract <p>Two binuclear ruthenium complexes featuring σ‑acetylide bridged [{Ru(bpy)(PPh<sub>3</sub>)<sub>2</sub>(MeCN)}<sub>2</sub>(μ‑C≡C–R–C≡C)] with R = 2,5‑thiophenediyl (<b>I</b>) or 1,4‑benzenediyl (<b>II</b>) were synthesized by reacting [Ru(bpy)(PPh<sub>3</sub>)<sub>2</sub>(MeCN)<sub>2</sub>]<sup>2+</sup> with the corresponding silyl‑protected dialkynes Me<sub>3</sub>Si–C≡C–R–C≡C–SiMe<sub>3</sub> in the presence of K<sub>2</sub>CO<sub>3</sub>. <b>I</b>n each complex, the ruthenium center is chelated by a 2,2'‑bipyridyl (bpy) ligand and connected through π‑conjugated 2,5‑thiophene or 1,4‑phenylene spacers. Both compounds were fully characterized by microanalysis, <sup>1</sup>H and <sup>31</sup>P{<sup>1</sup>H} NMR spectroscopy, and ES<b>I</b>‑mass spectrometry. The solid‑state structure of complex <b>I</b> was unambiguously determined by single‑crystal X‑ray diffraction. Furthermore, the electrochemical and photophysical properties of these complexes have been investigated.</p>

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Synthesis, Structure, and Redox Properties of Dinuclear Ruthenium Complexes Connected by Bis(ethynyl)thiophene and Bis(ethynyl)benzene

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • W. K. Kang,
  • C. P. Yang,
  • L. B. Gao

摘要

Abstract

Two binuclear ruthenium complexes featuring σ‑acetylide bridged [{Ru(bpy)(PPh3)2(MeCN)}2(μ‑C≡C–R–C≡C)] with R = 2,5‑thiophenediyl (I) or 1,4‑benzenediyl (II) were synthesized by reacting [Ru(bpy)(PPh3)2(MeCN)2]2+ with the corresponding silyl‑protected dialkynes Me3Si–C≡C–R–C≡C–SiMe3 in the presence of K2CO3. In each complex, the ruthenium center is chelated by a 2,2'‑bipyridyl (bpy) ligand and connected through π‑conjugated 2,5‑thiophene or 1,4‑phenylene spacers. Both compounds were fully characterized by microanalysis, 1H and 31P{1H} NMR spectroscopy, and ESI‑mass spectrometry. The solid‑state structure of complex I was unambiguously determined by single‑crystal X‑ray diffraction. Furthermore, the electrochemical and photophysical properties of these complexes have been investigated.