Kaur Manpreet, Malik Ashok Kumar
Department of Applied Sciences, CEC-Chandigarh Group of Colleges, Landran, Mohali, Punjab, 140307, India.
Department of Chemistry, Punjabi University, Patiala, 147002, Punjab, India.
J Fluoresc. 2025 May;35(5):3267-3288. doi: 10.1007/s10895-024-03751-4. Epub 2024 May 15.
A Zn(II)-based metal-organic framework (MOF) decorated with amine and azine functionalities, TMU-17-NH (formulated as [Zn(H2ata)(L)].2DMF; L = 1,4-bis(4-pyridyl)-2,3-diaza-2,3-butadiene and Hata = 2-aminoterephthalic acid) has been successfully synthesized via a solvothermal method. According to crystallographic studies, the synthesized TMU-17-NH has three dimensional cuboidal structure with the pore surface decorated with free amine (-NH2) and azine (= N-N =) functional groups. The photoluminescence investigations proved that the synthesized MOF can be effectively utilized for selective detection of 2,4,6-trinitrophenol (TNP) in water with an apparent turn-off quenching response. Its limits of detection (LOD) for TNP was 9.4 ppb and competitive nitro explosive testing confirmed its higher selectivity towards TNP (over other nitro explosives). Calculations based on density functional theory (DFT) and spectrum overlap were utilized to evaluate the sensing mechanisms. This MOF-based fluorescence sensing technique for TNP had a high sensitivity (K = 3.26 × 10 M).
一种装饰有胺和嗪官能团的锌（II）基金属有机框架（MOF），即TMU-17-NH（化学式为[Zn(H2ata)(L)].2DMF；L = 1,4-双（4-吡啶基）-2,3-二氮杂-2,3-丁二烯，Hata = 2-氨基对苯二甲酸）已通过溶剂热法成功合成。根据晶体学研究，合成的TMU-17-NH具有三维立方结构，其孔表面装饰有游离胺（-NH2）和嗪（=N-N=）官能团。光致发光研究证明，合成的MOF可有效用于水中2,4,6-三硝基苯酚（TNP）的选择性检测，并具有明显的关闭猝灭响应。其对TNP的检测限（LOD）为9.4 ppb，竞争性硝基炸药测试证实了其对TNP的更高选择性（相对于其他硝基炸药）。基于密度泛函理论（DFT）和光谱重叠的计算用于评估传感机制。这种基于MOF的TNP荧光传感技术具有高灵敏度（K = 3.26×10 M）。
