摘要
利用传统的热注入方法,引入新型配体双(2,4,4-三甲基戊基)膦酸(TMPPA)制备了Cs_(3)Cu_(2)Cl_(5)NCs纳米晶(nanocrystals,NCs),通过荧光、紫外、X射线衍射(XRD)、扫描电镜(SEM)等表征手段表明成功制备了具有绿色荧光Cs_(3)Cu_(2)Cl_(5)NCs.由于Cs_(3)Cu_(2)Cl_(5)NCs结构中的Cu^(+)在空气中随着时间的推移可以被氧化为Cu^(2+)从而导致其整体结构的坍塌,荧光发生猝灭,因此可以作为设计时间传感模型的良好材料.在实验过程中,通过配体(TMPPA)改性策略调控其粒径大小实现了24 h的时间传感,可为食品安全领域提供了一种新的防伪方式.
Cs_(3)Cu_(2)Cl_(5)NCs were prepared by introducing a new ligand,bis(2,4,4-trimethylpentyl)phosphonic acid(TMPPA),using a traditional thermal injection method.Characterization techniques such as fluorescence,ultraviolet,X-ray diffraction(XRD),and scanning electron microscopy(SEM)showed that the NCs with green fluorescence Cs_(3)Cu_(2)Cl_(5)were successfully prepared.As the Cu^(+)in the Cs_(3)Cu_(2)Cl_(5) NCs structure can be oxidized to Cu^(2+)in the air over time,leading to the collapse of its overall structure and fluorescence quenching,it can be used as a good material for designing time sensing models.During the process of the experiment,the particle size of the ligand(TMPPA)modification strategy was adjusted to achieve 24-hour time sensing,which provides a new anti-counterfeiting method for the field of food safety.
作者
吴曼纯
陈国良
张鹏
李婉婷
陈海妮
李飞明
WU Manchun;CHEN Guoliang*;ZHANG Peng;LI Wanting;CHEN Haini;LI Feiming(College of Chemistry,Chemical Engineering and Environment,Minnan Normal University,Zhangzhou 363000,China)
出处
《闽南师范大学学报(自然科学版)》
2024年第4期28-36,共9页
Journal of Minnan Normal University:Natural Science
基金
国家自然科学基金项目(22004055)
福建省自然科学基金项目(2020J05165)。
关键词
铜基钙钛矿
时间传感
荧光防伪膜
热注入方法
copper-based perovskite
time sensing
fluorescent security film
thermal injection method