Although the construction of specific functional crystalline materials is still challenging, the multi-component molecular assembly has become a key solution for the design of functional materials. Here, we report a hydrogen-bonded organic framework (HOF) material FJU-360 constructed from disodium 6‑hydroxy-5-[(4-sulfophenyl)azo]-2-naphthalenesulfonate (SSY) and terephthalimidamide. The charge-assisted hydrogen bonding between amidinium and sulfonate makes FJU-360 produce much stronger fluorescence than SSY, and can be used as a luminescence sensor to rapidly quench aniline through luminescence quenching. FJU-360 is sensitive and highly selective for the detection of aniline, and the detection limit reached 3.2 nmol/L, which is the lowest value reported currently. The mechanism of aniline response was analyzed through the aniline@FJU-360 single crystal structure, and the luminescence mechanism was clarified through density function theory calculations. This work is an important step towards the rational synthesis and assembly of sensing materials.

尽管构建特定的功能晶体材料仍然具有挑战性，但多组分分子组装已成为功能材料设计的关键解决方案。在这里，我们报道了一种由 6-羟基-5-[(4-磺苯基)偶氮]-2-萘磺酸二钠 (SSY) 和对苯二甲酰亚胺构成的氢键有机骨架 (HOF) 材料 FJU-360。脒鎓和磺酸盐之间的电荷辅助氢键使FJU-360产生比SSY强得多的荧光，可用作发光传感器，通过发光猝灭快速猝灭苯胺。FJU-360对苯胺的检测灵敏度高，选择性高，检测限达到3.2 nmol/L，是目前报道的最低值。通过aniline@FJU-360单晶结构分析了苯胺响应的机理，通过密度泛函理论计算阐明了发光机理。这项工作是朝着传感材料合理合成和组装迈出的重要一步。