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首页> 外文期刊>Chemistry: A European journal >Intramolecular Hydrogen Bonding in Benzoxazines: When Structural Design Becomes Functional
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Intramolecular Hydrogen Bonding in Benzoxazines: When Structural Design Becomes Functional

机译：苯并恶嗪中的分子内氢键：当结构设计开始起作用时

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摘要

The future evolution of benzoxazines and polybenzoxazines as advanced molecular, structural, functional, engineering, and newly commercial materials depends to a great extent on a deeper and more fundamental understanding at the molecular level. In this contribution, the field of benzoxazines is briefly introduced along with a more detailed review of ortho-amide-functional benzoxazines, which are the main subjects of this article. Provided in this article are the detailed and solid scientific evidences of intramolecular five-membered-ring hydrogen bonding, which is supposed to be responsible for the unique and characteristic features exhibited by this ever-growing family of ortho-functionalized benzoxazines. One-dimensional (1D) (HNMR)-H-1 spectroscopy was used to study various concentrations of benzoxazines in various solvents with different hydrogen-bonding capability and at various temperatures to investigate in detail the nature of hydrogen bonding in both ortho-amide-functionalized benzoxazine and its para counterpart. These materials were further investigated by two-dimensional (2D) H-1-H-1 nuclear Overhauser effect spectroscopy (NOESY) to verify and support the conclusions derived during the 1D (HNMR)-H-1 experiments. Only highly purified single-crystal benzoxazine samples have been used for this study to avoid additional interactions caused by any impurities.
机译：作为先进的分子，结构，功能，工程和新商业材料的苯并恶嗪和聚苯并恶嗪的未来发展在很大程度上取决于对分子水平的更深入和更基础的理解。在此贡献中，简要介绍了苯并恶嗪的领域，并更详细地综述了正酰胺功能的苯并恶嗪，这是本文的主要主题。本文提供了分子内五元环氢键的详细而可靠的科学证据，据信这是由这个功能不断增长的邻官能化苯并恶嗪家族所展现的独特特征所致。使用一维（1D）（HNMR）-H-1光谱研究了在各种溶剂中具有不同氢键合能力和各种温度的各种浓度的苯并恶嗪，以详细研究两种邻酰胺-中氢键的性质功能化的苯并恶嗪及其对等物。通过二维（2D）H-1-H-1核Overhauser效应光谱（NOESY）对这些材料进行了进一步研究，以验证和支持1D（HNMR）-H-1实验期间得出的结论。本研究仅使用高度纯化的单晶苯并恶嗪样品，以避免任何杂质引起的其他相互作用。

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