Synthesis and Properties of a Mixed‐Valence Compound with Single‐Step Tunneling and Multiple‐Step Hopping Behavior
作者:Rim Makhoul、Yuki Kumamoto、Akira Miyazaki、Frédéric Justaud、Frédéric Gendron、Jean‐François Halet、Jean‐René Hamon、Claude Lapinte
DOI:10.1002/ejic.201402022
日期:2014.8
[6-trans][PF6]n (n = 1–3). Visible, IR, near-IR (NIR), and electron paramagnetic resonance (EPR) spectroscopy together with DFT data show that [6-trans][PF6] is a class II mixed-valence complex (Hab = 85 cm–1) in which the spin distribution depends on the conformation of the molecule. Intramolecular electron transfer occurs through single-step tunneling and a multistep hoping mechanism. The triplet state is thermally
有机前体双(三甲基甲硅烷基乙炔基)TTFMe2(3,TTF = 四硫富瓦烯)制备为顺式和反式异构体的 1:1 混合物。3-顺式和3-反式的纯样品通过结晶获得并通过XRD分析进行鉴定。用 (i) 碳酸钾,(ii) 铁络合物 Cp*(dppe)FeCl [5, Cp* = η5-C5Me5, dppe = 1,2-双(二苯基膦基)乙烷]在 KPF6 和 (iii) tBuOK 存在下提供 Cp*(dppe)Fe–C≡C–TTFMe2–C≡C–Fe(dppe)Cp* 作为纯几何异构体6-反式 (85%) 和 60:40 混合物分别为 6-顺式/反式 (63%)。6-反式与[(C5H5)2Fe]PF6 氧化得到[6-反式][PF6]n (n = 1-3)。可见光、红外、近红外 (NIR)、和电子顺磁共振 (EPR) 光谱以及 DFT 数据表明 [6-trans][PF6] 是 II 类混合价络合物