Organic luminescent materials having photoluminescence in their solid state have become emerging trends in chemistry, materials science, and biology due to their versatile potential applications. In the present contribution, we have introduced some methylenebis(4,1-phenylene) electron donor–acceptor-based fashionable solid-state fluorescent molecules, MBA, MBB, and MBH, having exciting photoluminescence characteristics in their solid and aggregate states. Interestingly, all probes exhibited a compelling aggregation-induced enhanced emission (AIEE) phenomenon in aqueous media. The mechanistic aspects of solid-state brightness and AIEE behavior are elucidated by diverse spectroscopic, microscopic, and X-ray crystallographic analyses. Employing their intriguing AIEE characteristics, the water-suspended low dimensional particles have been employed as a sensor, demonstrating rapid sensitivity and brilliant selectivity towards the nitro-explosive compound picric acid (PA). The estimated limits of detection (LOD) and quantification (LOQ) reach as low as the μM to nM range in the aqueous medium. The fluorescent paper strip-based test kit experiment has been demonstrated for instant detection of PA through visual examination in the solid state, rendering the protocol quick, cost-effective, and appropriate for on-spot solid-state recognition.

中文翻译：

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基于亚甲基双（4,1-苯基）键的电子供体-受体二元组的亮度和 AIEE 行为及其对水性介质和固态爆炸性苦味酸稳健定量的影响


由于其广泛的潜在应用，具有固态光致发光的有机发光材料已成为化学、材料科学和生物学的新兴趋势。在本文稿中，我们介绍了一些基于亚甲基双（4,1-苯基）电子供体-受体的时尚固态荧光分子 MBA、MBB 和 MBH，它们在固体和聚集体状态下具有令人兴奋的光致发光特性。有趣的是，所有探针在水性介质中都表现出引人注目的聚集诱导增强发射 （AIEE） 现象。固态亮度和 AIEE 行为的机理方面通过各种光谱、显微镜和 X 射线晶体学分析来阐明。利用其有趣的 AIEE 特性，水悬浮的低维颗粒被用作传感器，对硝基爆炸化合物苦味酸 （PA） 表现出快速的灵敏度和出色的选择性。在水性培养基中，估计检测限 （LOD） 和定量限 （LOQ） 可低至 μM 至 nM 范围。基于荧光纸条的检测试剂盒实验已被证明可以通过固态的目视检查即时检测 PA，使该方案快速、经济高效且适用于现场固态识别。