Hydrogen-Bonded Cyclic Dimers at Large Compression: The Case of 1H-pyrrolo[3,2-h]quinoline and 2-(2′-pyridyl)pyrrole
作者:Dominik Kurzydłowski、Taisiia Chumak、Jakub Rogoża、Arkadiusz Listkowski
DOI:10.3390/molecules26133802
日期:——
However, the intramolecular N‒H∙∙∙N interaction is either weakly affected by pressure, as witnessed in PQ, or weakened due to compression-induced distortions of the molecule, as was found for PP. Therefore, we propose that the compression of these systems should facilitate double proton transfer within the cyclic dimers of PQ and PP, while intramolecular transfer should either remain unaffected (for
1 H-吡咯[3,2- h]qinoline (PQ) 和 2-(2'-pyridyl)pyrrole (PP) 是质子转移反应研究中的重要系统。这些分子具有氢键供体(吡咯)和受体(吡啶)基团,这导致在其晶体中形成环状二聚体。在此,我们对 PQ 和 PP 分子晶体的高压行为进行了联合实验(拉曼散射)和计算(DFT 建模)研究。我们的结果表明,压缩至 10 GPa (100 kbar) 会显着增强环状二聚体内的分子间氢键。然而,分子内 N-H∙∙∙N 相互作用要么受到压力的微弱影响,如 PQ 所见,要么由于压缩引起的分子扭曲而减弱,如 PP 所见。所以,