Series of solid-state emitters based on the D-π-A dipolar structure and featuring various electron-donor and electron-acceptor groups were designed, and their spectroscopic properties studied. From weak emission in dilute solutions, intense emissions in aggregated state (AIE) and in the crystalline state were obtained. Analysis in light of crystal structures obtained by X-ray diffraction revealed specific crystal packing and presence of long chain of emitting aggregates. This simple molecular engineering around the D-π-A dipolar structure provides easy access to a wide range of effective solid-state emitters allowing modulation of emission wavelengths up to the near infrared (λ_em reaching 735 and 768 nm for compound 2f and 3f bearing the strongest electron-withdrawing group).

设计了一系列基于D-π-A偶极结构并具有各种电子给体和电子受体基团的固态发射体，并研究了它们的光谱性质。通过稀溶液中的弱发射，可以得到聚集态（AIE）和结晶态的强发射。通过X射线衍射获得的晶体结构的分析表明特定的晶体堆积和存在发射聚集体的长链。周围的d-π-A偶极结构这个简单的分子工程提供方便了广泛的有效的固态发射体，允许发射的调制波长到近红外（λ _EM达到735和768化合物纳米2F和3F 带有最强的吸电子基团）。