化学
发光
水溶液
激发态
方位(导航)
离子
杀虫剂
光电子学
物理化学
有机化学
原子物理学
人工智能
物理
计算机科学
农学
生物
作者
Zhao-Di Zhou,Shiqi Li,Wenping Wang,Dongge Ma,Hanqing Zhao,Lin-Fang Jia,Yi Jia,Baoyi Yu
标识
DOI:10.1016/j.molstruc.2022.134310
摘要
• The synthesis and structural characterization of two new 2D Cd-based CPs have been reported. It is interesting to notice that two almost two excitation with with similar intensity and one emission was found. And, each of the excitation exhibited specific preference towards the quenchers (250 nm for nitenpyram (NTP) and 290 nm for metamitron (MMT). Two metal organic framework were constructed from mix-ligands and Cd(II) ions: [Cd(NIP) 2 (DTP)(H 2 O) 2 ]·H 2 O ( Cd-1 ) (H 2 NIP = 5-nitro iso phthalic acid and DTP = 3,5-di(1,2,4-triazol-1-yl)pyridine) and [Cd(NTP) 2 (DTP)(Et)(H 2 O) 2 ]·(H 2 O) 0.5 ( Cd-2 ) (H 2 NTP = nitroterephthalic acid and Et = ethanol). The MOFs were determined and confirmed by single-crystal X-ray diffraction (XRD), elemental analysis, infrared spectroscopy (IR), powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA) and fluorescence analysis. The fluorescence sensing application of the sensors demonstrated the two sensors were extra sensitive and selective towards Fe 3+ and Cr 2 O 7 2- during the sensing of the ions under both 250 and 290 nm excitation wavelength; were extra effective and sensitive towards NTP (EX 250 nm) and MMT (EX 290 nm) in sensing of the pesticides for the two sensors. Mechanism investigation revealed both inner filter effect (IFE) and fluorescence resonance energy transfer (FRET) mechanisms played major roles during the sensing process of Fe 3+ , Cr 2 O 7 2− , NTP and MMT.
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