描述了一种新的逐步合成方法,用于制备精确定义的低聚(对-亚苯基亚乙炔基)(OPE)。合成了具有二己氧基侧基和三甲基甲硅烷基(TMS)或硫代乙酰基(SAc)末端的OPE的高纯度单体,三聚体,五聚体,七聚体和九聚体。低聚物的结构通过1 H NMR表征,1313 C NMR和元素分析。DSC研究显示出狭窄且发达的熔融和结晶峰,表明这些低聚物中形成的晶体高度完美。例如,光学显微镜用于研究具有TMS端基的五聚体固态膜的超分子形态。许多树突状体的球状尺寸约为。观察到50μm。稀溶液和薄膜中的UV-vis吸收和光致发光(PL)光谱均显示λmax从三聚体到九聚体逐渐红移。在九阶阶段,光学最大值接近会聚极限。
[(3-Cyanopropyl)diisopropylsilyl]acetylene, a More Stable Analogue of [(3-Cyanopropyl)dimethylsilyl]acetylene
作者:Sigurd Höger、Gerald Gaefke
DOI:10.1055/s-2008-1067141
日期:2008.7
The preparation and application of a new alkyne protecting group is presented. The reactivity and stability of [(3-cyanopropyl)diisopropylsilyl]acetylene is similar to that of the well-known (triisopropylsilyl)acetylene. Its high polarity simplifies chromatographic separation after coupling to aromatics with more than one reactive site. Moreover, compounds with more than one [(3-cyanopropyl)diisopropylsilyl]acetylene group are easily purified after partial deprotection.
Convergent Synthesis of 10 nm Aryleneethynylene Molecular Wires by an Iterative Regioselective Deprotection/Sonogashira Coupling Protocol
作者:Changsheng Wang、Andrei S. Batsanov、Martin R. Bryce
DOI:10.1021/jo051711o
日期:2006.1.1
The synthesis of a new series of rigid-rod aryleneethynylene derivatives of up to ca. 10 nm molecular length (compounds 16 and 17) is reported using iterative Pd-mediatedSonogashiracoupling methodology combined with regioselective removal of the different protecting groups (namely, trimethylsilyl and 2-hydroxyprop-2-yl groups) from the terminal alkyne units. Additionally, the TMS−acetylene unit has
Carbon-rich molecules: synthesis and isolation of aryl/heteroaryl terminal bis(butadiynes) (HCC–CC–Ar–CC–CCH) and their applications in the synthesis of oligo(arylenebutadiynylene) molecular wires
作者:Kara West、Changsheng Wang、Andrei S. Batsanov、Martin R. Bryce
DOI:10.1039/b802968g
日期:——
The synthesis, isolation and characterisation are reported for a series of terminalaryl/heteroaryl bis(butadiynes) (HC[triple bond]C-C[triple bond]C-Ar-C[triple bond]C-C[triple bond]CH) 4a-e including the X-ray molecular structure of the 2,5-pyridylene derivative 4d; compound 4a and the mono-protected analogue [HC[triple bond]C-C[triple bond]C-Ar-C[triple bond]C-C[triple bond]C-C(OH)Me2] 5a serve
报告了一系列末端芳基/杂芳基双(丁二炔)(HC [三键] CC [三键] C-Ar-C [三键] CC [三键] CH)4a-e的合成,分离和表征包括2,5-亚吡啶衍生物4d的X射线分子结构;化合物4a和单保护的类似物[HC [三键] CC [三键] C-Ar-C [三键] CC [三键] CC(OH)Me2] 5a可作为合成高-共轭低聚(亚芳基丁二炔)。
Synthesis and Optical Properties of Molecular Rods Comprising a Central Core-Substituted Naphthalenediimide Chromophore for Carbon Nanotube Junctions
作者:Sergio Grunder、David Muñoz Torres、Christoph Marquardt、Alfred Błaszczyk、Ralph Krupke、Marcel Mayor
DOI:10.1002/ejoc.201001415
日期:2011.1
Synthetic protocols based on Sonogashira–Hagihara couplings were developed to build up the OPE backbone. Bifunctional iodophenyl acetylene derivative 33 served as a key building block in a coupling–deprotecting–coupling sequence. The NDI building block was synthesized by an aromatic nucleophilic substitution reaction of 2,6-dichloro-1,4,5,8-tetracarboxylic acid naphthalenediimide derivative 9 and the corresponding
central phenanthroline of the molecular device by altering metal ions (Cu+ → Zn2+) or stoichiometry (Cu+, 1 equiv. → 0.5 equiv.) affected the terminal zinc(II) porphyrin units, the active sites within the machinery, changing rotational, catalytic and optical properties. In presence of added pyrrolidine, the nanorotor ROT-1 was inactive for catalysis whereas formation of the dimeric supramolecular structures