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首页> 外文期刊>Chemistry: A European journal >Precise 2D-Patterned Incompatible Catalysts for Reactions in One-Pot
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Precise 2D-Patterned Incompatible Catalysts for Reactions in One-Pot

机译：精确的2D-图案化不相容的催化剂，用于1罐中的反应

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摘要

Precise and direct two-dimensional (2D) printing of the incompatible polymer acid-base catalysts and their utility in one-pot two-step reactions were shown. Multistep catalytic reactions using incompatible catalysts in a one-pot reaction cascade requires special methods and materials to isolate the catalysts from each other. In general, this is a tedious process requiring special polymer architectures as the carrier for the catalysts to preserve the activity of otherwise incompatible catalysts. We propose the immobilization of incompatible polymer catalysts, such as polymer acid and base catalysts, on a substrate in variable sizes and amounts by precise 2D printing. The terpolymers with basic (4-vinylpyridine) and acidic (styrene sulfonic acid) functionalities and methacryloyl benzophenone as a UV cross-linking unit were used for 2D printing on poly(ethylene terephthalate) (PET). The printed meshes were immersed together in a reaction solution containing (dimethoxymethyl)benzene and ethyl cyanoformate, resulting in a two-step acid-base catalyzed cascade reaction; that is, deacetalization followed by carbon-building reaction. The time-dependent consumption of (dimethoxymethyl)benzene to the intermediate benzaldehyde and the product was monitored, and a kinetic model was developed to investigate the underlying reaction dynamics. The complexity of multistep Wolf-Lamb-type reactions was generally significantly decreased by using our approach because of the easy polymerization and immobilization procedure.
机译：显示了不相容的聚合物酸碱催化剂的精确和直接二维（2D）印刷及其在一锅两步反应中的效用。使用单罐反应级联中使用不相容的催化剂的多步催化反应需要特殊的方法和材料，以彼此分离催化剂。通常，这是一种繁琐的方法，需要特殊的聚合物架构作为催化剂的载体，以保持其他不相容的催化剂的活性。我们提出了通过精确的2D印刷将不相容的聚合物催化剂（例如聚合物酸和基催化剂）固定在可变尺寸和量的底物上。用碱（4-乙烯基吡啶）和酸性（苯乙烯磺酸）官能团和甲基丙烯酰二苯甲酮作为UV交联单元的三元共聚物用于聚（乙二醇酯）（PET）上的2D印刷。将印刷网浸入含有（二甲氧基甲基）苯和乙酸乙酯的反应溶液中，导致两步酸碱催化级联反应;也就是说，脱象，然后是碳建筑反应。监测（二甲氧基甲基）苯的时间依赖性消耗，监测中间苯甲醛和产物，并开发动力学模型以研究潜在的反应动态。通过使用我们的方法通常通过易于聚合和固定方法使用方法，通常显着降低了多步狼羊肉型反应的复杂性。

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  • 来源
    《Chemistry: A European journal》 |2019年第59期|共7页
  • 作者

    Martin O. Pretscher; Tingting Chen; Gabriel Sitaru; Stephan Gekle; Jian Ji; Seema Agarwal;

  • 作者单位

    Macromolecular Chemistry II Bavarian Polymer Institute University of Bayreuth Universit?tsstrasse 30 95440 Bayreuth (Germany);

    MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 (P.R. China);

    Theoretical Physics VI Biofluid Simulation and Modelling University of Bayreuth Universit?tsstrasse 30 95440 Bayreuth (Germany);

    Theoretical Physics VI Biofluid Simulation and Modelling University of Bayreuth Universit?tsstrasse 30 95440 Bayreuth (Germany);

    MOE Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 (P.R. China);

    Macromolecular Chemistry II Bavarian Polymer Institute University of Bayreuth Universit?tsstrasse 30 95440 Bayreuth (Germany);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    heterogeneous catalysis; immobilization; multicomponent reactions; nanostructures; polymers; solidstate structures;

    机译：异质催化;固定化;多组分反应;纳米结构;聚合物;固体结构;

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