【摘要】 以二苯氨基-4-苯甲醛和邻苯二胺为前驱体，乙醇为溶剂，采用溶剂热法合成了具有高量子产率（QY=87.76%）的氮掺杂荧光碳点（N-CDs）。通过对有机溶剂和水溶液中N-CDs光学性质的考察，表明N-CDs具有良好的溶剂依赖性和化学稳定性。水的加入在N-CDs中构建氢键网格，从而实现了发射波长的红移，N-CDs溶液由蓝色变为黄色。进一步，基于N-CDs荧光试纸蓝色到黄色的可逆颜色变化，制备便携的空气湿度可视化检测试纸。此外，N-CDs还可用于荧光墨水、书写纸和荧光柔性薄膜，拓展了其在信息传递，高级防伪加密和固态荧光的应用。更多还原

【Abstract】 Nitrogen doped fluorescent carbon dots(N-CDs) with high quantum yield(QY=87. 76%) were synthesized by solvothermal method using diphenylamino-4-benzaldehyde and o-phenylenediamine as raw materials and ethanol as solvent. The optical properties of N-CDs in organic solvents and aqueous solutions were investigated, indicating that N-CDs have good solvent dependence and chemical stability. The addition of water constructed a hydrogen bonding grid in N-CDs, thereby achieving a redshift in emission wavelength, and the N-CDs solution changes from blue to yellow. Furthermore, based on the reversible color change from blue to yellow of N-CDs fluorescent test strips, a portable air humidity visualization detection test strip was prepared. In addition, N-CDs can also be used for fluorescent ink, writing paper, and fluorescent flexible films, which expanding their applications in information transmission, advanced anti-counterfeiting encryption, and solid-state fluorescence.更多还原