Divalent <i>ansa</i>-Octaphenyllanthanocenes: Synthesis, Structures, and Eu<sup>II</sup> Luminescence
作者:Angus C. G. Shephard、Aymeric Delon、Sylviane Chevreux、Agathe Martinez、Zhifang Guo、Glen B. Deacon、Gilles Lemercier、Nathan McClenaghan、Gediminas Jonusauskas、Peter C. Junk、Florian Jaroschik
DOI:10.1021/acs.inorgchem.3c01062
日期:——
flight mass spectrometry, and, in the case of Sm and Yb, multinuclear NMR spectroscopy, showing the influence of the ansa-bridge on solution and solid-state structures compared to previously reported unbridged metallocenes. Furthermore, the luminescence properties of the Eu ansa complex 3 were studied in solution and the solid state, revealing significant differences with the known octa- and deca-phenyleuropocenes
使用低价金属前体进行富烯的还原二聚是一种获得乙烯桥联茂金属的简单的一步方法。迄今为止,该方法主要用于在环外位置带有一个或两个取代基的富烯。在这项工作中,未取代的环外1,2,3,4-四苯基富烯 ( 1 ) 的新合成,通过核磁共振波谱和单晶 X 射线衍射对其进行了完整的结构表征,以及一些光物理性质及其首次用途描述了还原二聚化。该富烯与不同的镧系金属在 thf 中反应,得到二价ansa -八苯基茂金属 [Ln(C 5 Ph 4 CH 2 ) 2 (thf) n ] (Ln = Sm, n = 2 ( 2 ); Ln = Eu, n = 2( 3 );并且Ln=Yb, n =1( 4 ))。这些配合物通过 X 射线衍射、激光解吸/电离飞行时间质谱进行表征,对于 Sm 和 Yb,还通过多核 NMR 光谱进行表征,显示了ansa桥对溶液和固态结构的影响(比较)到先前报道的未桥联茂金属。此外,研究了Eu