The review compiles information on the spectral classification of flavonoids, the changes in their electronic structure upon complex formation, and the manifestation of these changes in the absorption and emission spectra. Part of the review is devoted to the regioselectivity of the complex formation process, including types of complexation sites, the structure of chelates and ′open′ complexes, and the correlation between the structure of complexes and their spectral properties. The interplay between complex formation and other processes occurring in flavonoids during electronic excitation is also considered, such as intramolecular inter-fragment charge transfer (ICT) and intramolecular proton transfer (ESIPT). The review also contains systematic data on the study of regioselectivity and spectral properties of flavone complexes, obtained by the author and their colleagues over the past decades.

中文翻译：

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黄酮类化合物的络合：光谱现象、区域选择性、电荷和质子转移的相互作用

该综述汇集了类黄酮的光谱分类、复合物形成时电子结构的变化以及吸收和发射光谱中这些变化的表现等信息。综述的一部分致力于络合物形成过程的区域选择性，包​​括络合位点的类型、螯合物和“开放”络合物的结构，以及络合物结构与其光谱特性之间的相关性。还考虑了复合物形成与电子激发过程中黄酮类化合物中发生的其他过程之间的相互作用，例如分子内片段间电荷转移（ICT）和分子内质子转移（ESIPT）。该综述还包含作者及其同事在过去几十年中获得的黄酮复合物区域选择性和光谱特性研究的系统数据。