Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy.
Molecules. 2023 Apr 18;28(8):3553. doi: 10.3390/molecules28083553.
Given their importance, hydrogen bonds (H-bonds) have been the subject of intense investigation since their discovery. Indeed, H-bonds play a fundamental role in determining the structure, the electronic properties, and the dynamics of complex systems, including biologically relevant materials such as DNA and proteins. While H-bonds have been largely investigated for systems in their electronic ground state, fewer studies have focused on how the presence of H-bonds could affect the static and dynamic properties of electronic excited states. This review presents an overview of the more relevant progress in studying the role of H-bond interactions in modulating excited-state features in multichromophoric biomimetic complex systems. The most promising spectroscopic techniques that can be used for investigating the H-bond effects in excited states and for characterizing the ultrafast processes associated with their dynamics are briefly summarized. Then, experimental insights into the modulation of the electronic properties resulting from the presence of H-bond interactions are provided, and the role of the H-bond in tuning the excited-state dynamics and the related photophysical processes is discussed.
鉴于氢键的重要性，自发现以来，它们一直是深入研究的主题。事实上，氢键在确定结构、电子性质和复杂系统的动力学方面起着基础性的作用，包括与生物学相关的物质，如 DNA 和蛋白质。虽然对于处于电子基态的系统，氢键已经得到了广泛的研究，但很少有研究关注氢键的存在如何影响电子激发态的静态和动态性质。这篇综述介绍了在研究多生色生物模拟复杂体系中氢键相互作用在调节激发态特征方面的更相关进展。简要总结了可用于研究激发态中氢键效应和表征与其动力学相关的超快过程的最有前途的光谱技术。然后，提供了关于氢键相互作用存在导致电子性质调制的实验见解，并讨论了氢键在调节激发态动力学和相关光物理过程中的作用。
