Chelating Fluorene Dyes as Mono- and Ditopic 2-(1H-1,2,3-Triazol-4-yl)pyridine Ligands and Their Corresponding Ruthenium(II) Complexes
作者:Ulrich Schubert、Bobby Happ、Johann Schäfer、Christian Friebe、Helmar Görls、Andreas Winter、Martin Hager、Jürgen Popp、Benjamin Dietzek
DOI:10.1055/s-0031-1289771
日期:2012.7
monotopic system revealed a similar absorption behavior compared to its ditopic counterpart, a remarkable fluorescence quantum yield deviation of one order of magnitude was observed (Φ = 0.66 for the unsubstituted ditopic and Φ = 0.07 for the monotopic ligand). All trzpy systems were coordinated to ruthenium(II) ions in high yields (>90%) using the bis(4,4′-dimethyl-2,2′-bipyridine)ruthenium(II) precursor
摘要 2-(1 H -1,2,3-三唑-4-基)吡啶(trzpy)可被视为2,2'-联吡啶的类似物,连接到9的2和7位上9-二辛基-9 H-芴提供一个单和两个配位配体。通过铜(I)催化的叠氮化物-炔烃1,3-环加成反应合成双齿N-杂环。此外,钯(0)催化的Sonogashira偶联允许在吡啶单元的5位引入吸电子苯基乙炔部分。配体的最大发射可以在100 nm的范围内变化,消光系数高达95 000 M –1 ·cm –1。尽管单位系统与双位系统相比显示出相似的吸收行为,但仍观察到了一个数量级的显着荧光量子产率偏差(未取代的双位化合物的Φ= 0.66,单位配体的Φ= 0.07)。使用双(4,4'-二甲基-2,2'-联吡啶)钌(II)前体,所有trzpy系统均以高收率(> 90%)与钌(II)离子配位。尽管已知2-(1,2,3-三唑-4-基)吡啶配体是钌(II)离子的潜在猝灭剂,但所有钌络合物均显