【摘要】 有机发光分子因其在光电子器件、固态激光和生物成像等领域的潜在应用，已被广泛用作研究光–物质相互作用的模型体系，尤其是在溶液态和固态中均表现出强烈发光特性的紧凑型单苯环发光分子，作为潜在的双态发光材料引起了广泛关注。本研究基于单苯环骨架设计并合成了一种新型荧光分子wx-3，通过在2,5-二氨基对苯二甲酸酯（wx-4）给体的γ位引入吸电子的酯基基团，有效调控了其分子内电子密度。与wx-4相比，wx-3在溶液中表现出更强的绿色发射、较大的斯托克斯位移，并对酸碱刺激具有显著的发光响应特性。此外，wx-3的单晶显示出明显的光波导行为，并观察到放大自发发射（ASE）现象，表明其可作为潜在的晶体激光增益介质。该研究提出了单苯环体系实现双态发光的合理分子设计策略，为开发高性能光电子与光子功能材料提供了新的思路。更多还原

【Abstract】 Due to their potential applications in optoelectronics, solid-state lasing, and bioimaging, organic luminophores have been extensively used as model systems for light matter interaction studies. Compact single-benzene luminophores capable of intense emission in both solution and solid states are promising dual-state emissive materials. Here, we design and synthesize a new fluorophore, wx-3, based on a single benzene framework. In wx-3, the electron density of the 2,5-diaminoterephthalate core(wx-4) is modulated by introducing an electron-withdrawing ester group at the γ-position. Compared with wx-4, wx-3 exhibits intensive green emission, large Stokes shift, and obvious luminescent responsiveness to acid-base stimuli in solution.In addition, the single crystals of wx-3 display obvious optical waveguiding property and the emergence of amplified spontaneous emission(ASE) also indicates that wx-3 is feasible as crystal laser medium. This work provides a rational molecular design concept for dual-state emission in single benzene systems which may have great potential in advanced optoelectronic and photonic devices.更多还原