Accelerated thermal reaction kinetics by indirect microwave heating of a microwave-transparent substrate
Accelerated thermal reaction kinetics by indirect microwave heating of a microwave-transparent substrate
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通过微波透明基材的间接微波加热加速热反应动力学
DOI：
10.1039/d1cp04883j
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发表时间：
2022
影响因子：
3.3
通讯作者：
Dudley, Gregory B.
中科院分区：
文献类型：
--
作者：
Tavakoli, Amir;Stiegman, Albert E.;Dudley, Gregory B.
可以使用微波（MW）能量选择性地加热对硝基苯甲醚（pNA）和均三甲苯（MES）的宏观均匀混合物。pNA溶质聚集成阿升级（1 aL = 10−18 L）的不同相域，这些聚集体可以选择性地MW加热至远超过周围MES溶剂沸点的温度。在此，使用pNA：MES的1：20混合物作为烯丙基萘基醚（ANE）的芳基克莱森重排的混合溶剂。 ANE本身在MW中不能有效加热，但pNA的选择性MW加热允许热能转移到ANE以加速重排动力学，高于基于Arrhenius动力学和测量的本体溶液温度所预期的。这项重点研究建立在先前的工作基础上，并强调了1：20 pNA：MES作为混合溶剂系统，以考虑战略性地利用MW特异性热效应。
Macroscopically homogeneous mixtures of p-nitroanisole (pNA) and mesitylene (MES) can be selectively heated using microwave (MW) energy. The pNA solutes agglomerate into distinct phase domains on the attoliter-scale (1 aL = 10−18 L), and these agglomerates can be MW-heated selectively to temperatures that far exceed the boiling point of the surrounding MES solvent. Here, a 1 : 20 mixture of pNA : MES is used as a mixed solvent for aryl Claisen rearrangement of allyl naphthyl ether (ANE). ANE itself does not heat effectively in the MW, but selective MW heating of pNA allows for transfer of thermal energy to ANE to accelerate rearrangement kinetics above what would be expected based on Arrhenius kinetics and the measured bulk solution temperature. This focused study builds on prior work and highlights 1 : 20 pNA : MES as a mixed solvent system to consider for strategically exploiting MW-specific thermal effects.