A regioselective approach for the synthesis of functionalized dipolar Y-shaped chromophores is demonstrated. A series of dipolar pyrrolopyrazine based molecules were prepared in a straightforward manner. The key step in the preparation of the chromophores involves two-fold Sonogashira coupling reaction between the pyrrolopyrazine core and acetylene derivatives. Different electron-donors, including, NH₂, NMe₂, OMe and CF₃, CN acceptors were incorporated into the chromophores. By adjusting the substituents at 2, 3, and 6-position of the pyrrolopyrazine, dipolar tunable molecules with wide emission band are synthesized. The optical, thermal, and electrochemical properties of the materials are analysed and the results are supported with the DFT calculations. The preliminary studies of these engineered Y-shaped molecules indicate their potential as new building blocks in the fields of optoelectronic devices.

证明了选择性合成功能化偶极Y型发色团的方法。以直接的方式制备了一系列基于偶极吡咯并吡嗪的分子。制备生色团的关键步骤涉及吡咯并吡嗪核心与乙炔衍生物之间的两次Sonogashira偶联反应。不同的电子给体，包括NH ₂，NMe ₂，OMe和CF ₃CN受体被结合到发色团中。通过调节吡咯并吡嗪的2、3和6位的取代基，可以合成具有较宽发射带的偶极可调分子。分析了材料的光学，热和电化学性质，并通过DFT计算来支持结果。这些工程化的Y形分子的初步研究表明它们在光电器件领域中作为新的构建基块的潜力。