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首页> 外文期刊>International Journal of Phytopharmacy >A REVIEW ON: A SIGNIFICANCE OF MICROWAVE ASSIST TECHNIQUE IN GREEN CHEMISTRY
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A REVIEW ON: A SIGNIFICANCE OF MICROWAVE ASSIST TECHNIQUE IN GREEN CHEMISTRY

机译：综述：微波辅助技术在绿色化学中的意义

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Microwave Assisted Synthesis is rapidly becoming the method of choice in modern synthesis and discovery chemistry laboratories. Microwave-assisted synthesis improves both throughput and turn-around time for chemists by offering the benefits of drastically reduced reaction times, increased yields, and purer products. In this type of synthesis we applying microwave irradiation to chemical reactions. The fundamental mechanism of microwave heating involves agitation of polar molecules or ions that oscillate under the effect of an oscillating electric or magnetic field. In the presence of an oscillating field, particles try to orient themselves or be in phase with the field. Only materials that absorb microwave radiation are relevant to microwave chemistry. These materials can be categorized according to the three main mechanisms of heating, namely. Dipolar polarization, Conduction mechanism, Interfacial polarization. Microwave chemistry apparatus are classified: Single-mode apparatus and Multi-mode apparatus. Although occasionally known by such acronyms as 'MEC' (Microwave-Enhanced Chemistry) or a€?MOREa€? synthesis (Microwave-organic Reaction Enhancement), these acronyms have had little acceptance outside a small number of groups. The ability to combine microwave technology with in-situ reaction monitoring as an analytical tools will offer opportunities for chemists to optimize the reaction conditions. Different compounds convert microwave radiation to heat by different amounts. This selectivity allows some parts of the object being heated to heat more quickly or more slowly than others (particularly the reaction vessel).
机译：微波辅助合成正迅速成为现代合成和发现化学实验室中选择的方法。微波辅助合成的优点是大大减少了反应时间，提高了收率并提供了纯度更高的产品，从而提高了化学家的生产能力和周转时间。在这种类型的合成中，我们将微波辐射应用于化学反应。微波加热的基本机制包括搅拌在振荡电场或磁场的作用下振荡的极性分子或离子。在存在振荡场的情况下，粒子会尝试使其自身定向或与该场同相。只有吸收微波辐射的材料才与微波化学有关。这些材料可以根据加热的三个主要机理进行分类。偶极极化，传导机制，界面极化。微波化学设备分为：单模设备和多模设备。尽管偶尔以“ MEC”（微波增强化学）或“ MOREa”等首字母缩写词而闻名。合成（微波-有机反应增强），这些缩写在少数群体中几乎没有被接受。将微波技术与原位反应监测相结合作为分析工具的能力将为化学家提供优化反应条件的机会。不同的化合物将微波辐射以不同的量转化为热量。这种选择性使得被加热物体的某些部分比其他部分（特别是反应容器）加热更快或更慢。

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