Synthesis of 2D Imine-Linked Covalent Organic Frameworks through Formal Transimination Reactions
作者:Edon Vitaku、William R. Dichtel
DOI:10.1021/jacs.7b06913
日期:2017.9.20
membranes, and catalyst supports. We report a general and scalable method for synthesizing imine- and β-ketoenamine-linked COFs based on the formal transimination of N-aryl benzophenone imines. These substrates are often the synthetic precursors of traditional polyfunctional aryl amine monomers and are more stable, soluble, and easy to handle and purify. The imine- and β-ketoenamine-linked COFs obtained from
共价有机骨架(COF)是具有可调拓扑和功能的结晶,永久多孔,二维或三维聚合物。与亚胺或β-酮胺相比,与亚胺或β-酮胺连接的COF在化学上更稳定,从而使其在包括储能装置,质子传导膜和催化剂载体在内的广泛应用中更具前景。我们报告了基于N的正式转氨合成亚胺和β-酮胺连接的COF的通用且可扩展的方法芳基二苯甲酮亚胺。这些底物通常是传统多官能芳基胺单体的合成前体,并且更稳定,可溶且易于处理和纯化。通过X射线衍射和表面积分析表征,从该方法获得的与亚胺和β-酮胺连接的COF显示出优异的材料质量。最优化的COF的Brunauer-Emmett-Teller表面积(> 2600 m 2 / g)非常接近其理论值(2830 m 2/G)。该方法适用于常规的溶剂热条件和微波加热,以较短的反应时间提供相似或什至更高的材料质量。高材料质量,可扩展性和二苯甲酮亚胺单体的可用性都是该方法的吸引人的特征。
Variation of the Backbone Conjugation in NLO Model Compounds: Torsion-Angle-Restricted, Biphenyl-Based Push-Pull-Systems
作者:Jürgen Rotzler、David Vonlanthen、Alberto Barsella、Alex Boeglin、Alain Fort、Marcel Mayor
DOI:10.1002/ejoc.200901358
日期:2010.2
responses. A general synthetic route that can be implemented to access these model compounds is reported, starting from dibromo or ditriflate biphenyls. Hartwig-Buchwald cross-coupling, a selective azacycloalkylation of diaminobiphenyls and a mild oxidation of primary amines to nitro groups in the presence of a tertiary amine summarizes the synthetic pathway towards the desired model compounds. NLO properties
Substituted benzophenone imines for COF synthesis <i>via</i> formal transimination
作者:Josefine Sprachmann、Niklas Grabicki、Anna Möckel、Jeremy Maltitz、José Refugio Monroy、Glen J. Smales、Oliver Dumele
DOI:10.1039/d3cc03735e
日期:——
prepared and their hydrolysis kinetics were studied spectroscopically. All substituted benzophenone imines can be employed in COF synthesis and lead to COFs with high crystallinity and high porosity. The substituents act innocent to COF formation as the substituted benzophenones are cleaved off. Imines can be tailored to their synthetic demands and utilized in COF formation. This concept can make access