基于ESIPT机制的镁基金属有机框架实现肼的高灵敏荧光传感  

Mg-based metal-organic framework for the sensitive detection of N_(2)H_(4)based on the ESIPT mechanism

作　　者：邢晨晨 李丹 翟全国[1] Chen-Chen Xing;Dan Li;Quan-Guo Zhai(Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education),School of Chemistry&Chemical Engineering,Shaanxi Normal University,Xi’an 710062,China)

机构地区：[1]应用表面与胶体化学教育部重点实验室,陕西师范大学化学化工学院,西安710062

出　　处：《中国科学：化学》2024年第10期1848-1855,共8页SCIENTIA SINICA Chimica

基　　金：国家重点研发计划(编号:2022YFA1205501);国家自然科学基金(编号:22071140)资助项目。

摘　　要：荧光金属有机框架(LMOFs)的开发为快速有效地检测危害品肼(N_(2)H_(4))提供了优良的平台.本文采用经典MIL-88为母体框架,使用孔道分区策略构建具备高度可调性的pacs-MOF(SNNU-301).SNNU-301基于激发态分子内质子转移(ESIPT)敏感连接体——2,5二羟基对苯二甲酸(2,5-DHBDC),实现了对肼的高灵敏比率荧光传感,检测限可低至0.78 ppm.结合对比实验结果,对肼-MOF之间发生的ESIPT过程进行了详细解释.基于MOF的荧光固态传感器展示了对痕量N_(2)H_(4)的可视化传感,表明这类基于ESIPT机制的镁基金属有机框架在实际应用中的巨大潜力.The development of fluorescent metal-organic frameworks(LMOFs)provides an excellent platform for the rapid and efficient detection of hazardous hydrazine(N_(2)H_(4)).Herein,MIL-88 was used as the parent framework,and an effective pore space partition was employed to construct a pacs-MOF(SNNU-301).SNNU-301 employs 2,5-dihydroxyterephthalic acid as a linker with the typical excited-state intramolecular proton transfer(ESIPT),achieving highly sensitive ratio fluorescence sensing for N_(2)H_(4),with the detection limit as low as 0.78 ppm.The ESIPT process occurring between N_(2)H_(4)and the MOF was thoroughly explained by comparative experimental results.Furthermore,the MOF-based fluorescent solid-state sensor demonstrates visual detection of trace amounts of N_(2)H_(4),indicating the enormous potential of such Mg-based metal-organic frameworks,leveraging the ESIPT mechanism,for practical applications.

关 键 词：金属有机框架 激发态分子内质子转移 荧光 肼传感 

分 类 号：O657.3[理学—分析化学] TP212[理学—化学]