首页> 外文会议>International Conference on Computational Science - ICCA 2003 Pt.2 Jun 2-4, 2003 Melbourne, Australia and St. Petersburg, Russia >Density Functional Investigations on the C-C Bond Formation and Cleavage in Molecular Batteries
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Density Functional Investigations on the C-C Bond Formation and Cleavage in Molecular Batteries

机译:分子电池中C-C键形成和裂解的密度泛函研究

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Density functional calculations have been performed on titanium, nickel, molybdenum and niobium Schiff base complexes and titanium, nickel porphyrinogen complexes in order to understand the behaviour of these systems in redox processes. In titanium 'and nickel Schiff base complexes C-C σ bonds are formed upon reduction, while in titanium and nickel porphyrinogen complexes C-C σ bonds are formed upon oxidation. In both systems, the formation or the cleavage of C-C bonds avoids a variation in the oxidation state of the metal and these C-C bonds act not only as electron reservoirs, but also as a buffer for the oxidation state of the metal. In the molybdenum Schiff base complexes a preferential formation of metal-metal bonds upon reduction is calculated, while in the niobium analogues the formation of C-C bonds competes with that of M-M bonds, the latter being the first ones to be involved in electron-transfer reactions.
机译:为了了解这些系统在氧化还原过程中的行为,已经对钛,镍,钼和铌席夫碱配合物以及钛,镍卟啉原配合物进行了密度泛函计算。在钛和镍的席夫碱配合物中,还原时形成C-Cσ键,而在钛和镍的卟啉原复合物中,氧化时形成C-Cσ键。在两种体系中,C-C键的形成或裂解都避免了金属氧化态的变化,并且这些C-C键不仅充当电子库,而且充当金属氧化态的缓冲剂。在钼席夫碱配合物中,计算出还原时金属-金属键的优先形成,而在铌类似物中,CC键的形成与MM键竞争,后者是第一个参与电子转移反应的键。

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