Bipyridine- and terpyridine-based ruthenium complexes containing fully conjugated ligands terminated with thiol groups were prepared and immobilized in self-assembled monolayers of alkanethiolates on gold surface, single molecules of which were observed with scanning tunnelling microscopy.
Convenient and Efficient Synthesis of Functionalized Oligopyridine Ligands Bearing Accessory Pyrromethene-BF<sub>2</sub> Fluorophores
作者:Gilles Ulrich、Raymond Ziessel
DOI:10.1021/jo035825g
日期:2004.3.1
2‘:6‘,2‘ ‘-terpyridine derivatives. Cross coupling of a bodipy-phenylethynyl molecule with the bromo-substituted partners takes place smoothly with the pyridine but with low yields in the other cases due to the efficient formation of the homocoupled diphenylbutadiyne bodipy compounds. A third convenient protocol enabled the preparation of these target molecules in a one-pot reaction where the deprotection
Synthesis of a Strained Acetylenic Macrocycle Incorporating a<i>para</i>-Oligo[2]cruciform Bridge Bent over Nanoscopic Dimensions: Structural, Electronic, Spectroscopic, and Ion-Sensing Properties
作者:Paul N. W. Baxter、Jean-Paul Gisselbrecht、Lydia Karmazin-Brelot、Alexandre Varnek、Lionel Allouche
DOI:10.1002/chem.201204569
日期:2013.9.9
diethyne cyclization preferentially yielded a structurally unusual macrocycle, comprising a strained conjugated oligo[2]cruciform wire, forced into a 2.2 nm bow‐shape by a terpyridine rein or tether, and stabilized towards light and heat by four insulating triisopropylsilylacetylene (TIPSA) substituents. Spectroscopic ion‐binding studies revealed the macrocycle to exhibit a particularly high UV/Vis selectivity
Eglinton-Galbraith二乙炔环化反应优先产生结构上异常的大环,包括应变的共轭寡聚[2]十字形线,被三联吡啶树脂或系链强迫成2.2 nm弓形,并通过四个绝缘的三异丙基甲硅烷基乙炔对光和热稳定( TIPSA)取代基。光谱离子结合研究表明,该大环化合物在稀溶液中对Pd II表现出特别高的UV / Vis选择性,并且其前体之一可提供对特定金属的多种发光猝灭和颜色响应,这暗示了有前途的离子传感器应用前景。在更集中的条件下,新的大环化合物能够结合特定的金属(例如Au I),尽管存在空间限制,但仍在其腔内。有趣的是,可变温度(VT)UV / Vis / 1 H NMR研究表明,TIPSA取代基的分子内运动受到限制,并且该化合物的光谱带隙随温度发生可逆变化。根据理论计算,VT UV / Vis观测结果与通过应变的oligo [2]十字形桥对电子共轭的热调制相一致,该桥与大环的构象异构体混合物