Abstract
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 ‘MORE’ 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).
Highlights
Introduction to MicrowaveChemistry,Online Available at http://homepages.ed.ac.uk/ah05/micro wave.html
LIMITATIONS OF MICROWAVE CHEMISTRY23, 24 The limitations of microwave chemistry are linked to its scalability, limited application, and the hazards involved in its use
Application of microwave radiation in chemical synthesis encompasses its use in the acceleration of chemical synthesis
Summary
OF MICROWAVE CHEMISTRY23, 24 The limitations of microwave chemistry are linked to its scalability, limited application, and the hazards involved in its use. With dangerous end results, have been observed while conducting polar acid-based reactions, for example, microwave irradiation of are action involving concentrated sulphuric acid may damage the polymer vessel used for heating. This is because sulphuric acid is a strong coupler of microwave energy and raises the reaction temperature to 300 C within a very short time. Microwave-irradiated DNA strands were usually destroyed, which does not occur in conventional heating This discovery has restricted the use of microwave heating to only a biological reactions
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