Development of novel organophosphorus-containing functional-dye materials

研究了含磷原子的新型六元共轭杂环化合物。这些荧光膦衍生物的合成方法多种多样，并研究了结构对合成材料物理性能的影响。4-取代的对称衍生物表现出较高的量子产率。4位取代基的电子效应对荧光波长影响较大，而3位取代基对荧光波长的影响较小。此外，我们还开发了一种通用的有机膦合成方法，为合成膦的起始原料的制备奠定了基础。此外，还实现了波长5-磷衍生物向波长3-衍生物的转化过程，所开发的新型杂环化合物有望在有机功能材料的开发中发挥重要作用。

Novel 6-membered conjugated heterocyclic compounds including a phosphorus atom were investigated. Versatile synthetic methods of these fluorescent phosphinine derivatives have been developed, and the structural effects on physical properties of the synthesized materials were investigated. 4-Substituted symmetric derivatives show relatively high quantum yields. The electronic effects of the substituents at 4-position strongly affect the wavelength of the fluorescence, whereas the substituents at 3-position have less influence. In addition, we also developed a versatile method of organophosphine synthesis for the preparation of the starting materials for the phosphinine synthesis. A conversion process of lambda5-phosphole derivatives to lambda3-derivatives was also achieved.The developed novel heterocyclic compounds are expected to play an important role for the development of organic functional materials.