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

研究了通过分子内钯催化的环化反应合成二苯并硅烷和-香料摩尔的反应。与传统的合成策略相比，目前的环化反应在官能团容差方面具有几个优点。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，观察到含酯部分的化合物具有较长的发射漂移，从而实现了固体荧光的显著高效率。本文所描述的结构-性质关系对于未来设计和合成以14族金属为关键结构单元的新型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.