Development of new synthetic method for cyclic group 14 compounds and application to luminescence materials

研究了钯催化的分子内环化反应合成二苯并硅杂环戊二烯和-germoles。与传统的合成硅杂环戊烯和锗杂环戊烯的方法相比，本发明的环化反应在官能团耐受性方面具有几个优点。发光性质可以通过分子结构，特别是取代基的电子效应来调节。通过形成J型聚集结构，实现了固态荧光的显着高效率，具有较长的发射位移观察到的化合物具有酯部分。本文所述的结构-性质关系对于未来设计和合成含有第14族金属茂作为关键构建单元的新的有机电致发光材料将是有价值的。

The synthesis of dibenzosiloles and -germoles obtained through an intramolecular Pd-catalyzed cyclization pathway is studied. Compared with the conventional synthetic strategies for achieving siloles and germoles, the present cyclization has several advantages in terms of functional group tolerances. The luminescence properties could be tuned through the molecular structure, particularly the electronic effects of the substituents. The remarkably high efficiency of the solid-state fluorescence, with a longer emission shift observed for the compounds having ester moiety, was achieved through the formation of a J-type aggregation structure. The structure-property relationships described herein will be valuable for the future design and synthesis of new organic electroluminescent materials containing Group 14 metalloles as a key building unit.