通过改性蒙脱土制备了活性钯催化剂。发现该催化剂对于合成基于乙二氧基噻吩的π-共轭分子是有效的。该反应通过粘土负载的Pd催化的直接C–H键活化(芳基化)机理进行。报告了催化剂的制备,表征和应用。用LCMS分析产物,并与报道的光谱数据(FT-IR,1 H NMR)进行比较。在三个反应周期中测试了粘土负载的钯催化剂对直接芳基化反应的可重复使用性,而没有明显降低催化活性。
Comparative Survey of Conducting Polymers Containing Benzene, Naphthalene, and Anthracene Cores: Interplay of Localized Aromaticity and Polymer Electronic Structures
作者:Alicia M. Fraind、John D. Tovar
DOI:10.1021/jp9101459
日期:2010.3.11
polyene character. On the other hand, resonance contributors can be rationalized for naphthalene and anthracene whereby one or two aromatic sextets evolve within the quinoidal structure thereby leading to a more localized electronicstructure. Monomer and polymer electronics were probed with UV−vis spectroscopy and cyclic voltammetry as well as through in situ profiling of the conductive states of the respective
Efficient synthesis of mono- and bis-arylated ethylenedioxy thiophene-based functional π-conjugated molecules via clay-supported palladium-catalysed direct arylation reactions
active Pd catalyst was prepared by the modification of montmorillonite clay. The catalyst was found to be effective for the synthesis of ethylenedioxy thiophene-based π-conjugated molecules. The reaction proceeded through clay-supported Pd-catalysed direct C–H bond activation (arylation) mechanism. Preparation, characterization and application of the catalysts are reported. The products were analysed with
通过改性蒙脱土制备了活性钯催化剂。发现该催化剂对于合成基于乙二氧基噻吩的π-共轭分子是有效的。该反应通过粘土负载的Pd催化的直接C–H键活化(芳基化)机理进行。报告了催化剂的制备,表征和应用。用LCMS分析产物,并与报道的光谱数据(FT-IR,1 H NMR)进行比较。在三个反应周期中测试了粘土负载的钯催化剂对直接芳基化反应的可重复使用性,而没有明显降低催化活性。