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Hydrogen bonding in phenol, water, and phenol-water clusters

机译:苯酚,水和苯酚-水簇中的氢键

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摘要

Structure, stability, and hydrogen-bonding interaction in phenol, water, and phenol-water clusters have been investigated using ab initio and density functional theoretical (DFT) methods and using various topological features of electron density. Calculated interaction energies at MP2/6-31G* level for clusters with similar hydrogen-bonding pattern reveal that intermolecular interaction in phenol clusters is slightly stronger than in water clusters. However, fusion of phenol and water clusters leads to stability that is akin to that of H2O clusters. The presence of hydrogen bond critical points (HBCP) and the values of p(r(c)) and del(2)p(r(c)) at the HBCPs provide an insight into the nature of closed shell interaction in hydrogen-bonded clusters. It is shown that the calculated values of total p(r(c)) and del(2)p(r(c)) of all the clusters vary linearly with the interaction energy.
机译:使用从头算和密度泛函理论(DFT)方法并利用电子密度的各种拓扑特征,研究了苯酚,水和苯酚-水簇中的结构,稳定性和氢键相互作用。对于具有相似氢键模式的簇,在MP2 / 6-31G *水平上计算的相互作用能表明,酚簇中的分子间相互作用略强于水簇中的分子间相互作用。然而,酚和水簇的融合导致类似于H 2 O簇的稳定性。氢键临界点(HBCP)的存在以及HBCP处p(r(c))和del(2)p(r(c))的值提供了对氢键中闭合壳相互作用的性质的了解集群。结果表明,所有簇的总p(r(c))和del(2)p(r(c))的计算值随相互作用能线性变化。

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