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A Conceptual DFT Approach for the Evaluation and Interpretation of Redox Potentials

机译:评估和解释氧化还原电位的概念性DFT方法

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Conceptual DFT aims at describing the properties of molecules in interactions by using chemical reactivity descriptors. Herein, the redox behaviour of a given species, as quantified by the redox potential, is linked to DFT-based descriptors. We made use of a hierarchical decomposition of the corresponding half-reactions into one-electron reduction, protonation, disso-ciation and water-forming or dissociation reactions. Most of these reactions can be readily described through reactivity descriptors, such as the electro-philicity, nucleofugality and electrofu-gality, as defined in conceptual DFT. The final expression linking the corresponding free energy changes to the redox potential seems to give correct predictions for the redox potentials of bromo, chloro and nitro oxo acids in the gas phase, as in a polarised continuum model.
机译:概念性DFT旨在通过使用化学反应性描述子描述相互作用中分子的性质。在此,给定物种的氧化还原行为(由氧化还原电势量化)与基于DFT的描述符关联。我们利用了相应的半反应的分层分解,将其分解为单电子还原,质子化,离解和水形成或离解反应。这些反应中的大多数都可以通过反应性描述符(如概念性DFT中定义的亲电性,亲核性和亲电性)轻松描​​述。与极化连续谱模型一样,将相应的自由能变化与氧化还原电势联系起来的最终表达式似乎可以正确预测气相中溴,氯和硝基含氧酸的氧化电势。

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