A New Fluorescence MOF for Highly Sensitive Detection of Acetylacetone

Abstract

A novel metal‐organic framework (MOF) assembled by a semi‐rigid tricarboxylate, namely, 5‐(3,4‐dicarboxylphenoxy) nicotic acid (H3L) has been solvothermally synthesized: [Zn3(L)2(H2O)2] ⋅ 3H2O 1. Single‐crystal X‐ray diffraction analysis indicates that MOF 1 shows 2‐D layer with quadrangle channels along the a axis (ca. 7.0×8.3 Å2). The 2‐D layer self‐assembles into a final 3‐D supramolecular network via the interlayer π⋯π interactions. The photoluminescence investigations indicate that 1 can selectively and sensitively detect acetylacetone (acac) with high KSV value of 3.597×104 M−1 and low limit of detection (LOD) of 50.77 ppb. Further mechanism studies have shown that static photo‐competitive absorption, photoinduced electron transfer and H‐bonding interaction between chemosensor and the analyte may be the primary causes of the fluorescence quenching effect for acac.

Recent Progress in Metal-Organic Framework Based Fluorescent Sensors for Hazardous Materials Detection

“…Hazardous solvents, highly toxic substances that can cause cancer, deformities, and blood poisoning, generally include toxic organic solvents and amine-based organic molecules [ 136 , 137 ]. Up to now, several methods such as high performance liquid chromatography, nuclear magnetic resonance spectroscopy, mass spectrometry, and infrared and ultraviolet (UV) spectroscopy have been available for probing hazardous solvents.…”

Stable CdII-Based Metal–Organic Framework as a Multiresponsive Luminescent Sensor for Acetylacetone, Salicylaldehyde, and Benzaldehyde with High Sensitivity and Selectivity

“…Electrons in the BBZB molecular orbital (HOMO) may be excited to its lowest unoccupied molecular orbital (LUMO), which can subsequently be transferred to the LUMO of acac, SA, or BZ. The comparison reveals that the LUMO energy level of BBZB (−0.16 eV) 45 is significantly higher than those of acac (−2.36 eV), 46 SA (−1.78 eV), and BZ (−1.90 eV), 47 supporting electron transfer from BBZB to acac, SA, and BZ. Therefore, it can be concluded that the cause of fluorescence quenching of JXUST-33 is the PET process and competitive energy absorption of acac, SA, or BZ.…”

Multifunctional cobalt metal–organic framework luminescent probe for the efficient sensing of Cr2O72−, MnO4− and nucleobases

“…In addition, the nucleobases are highly conjugated planar molecules and contain N, O and H atoms, which can exhibit weaker interactions such as p-p stacking or hydrogen bonding with the ligand moiety of Cobpy. [44][45][46] As Co-bpy is evenly dispersed in water that favors the accumulation of nucleobase molecules on and near the easily accessible surface of the MOF, thus these weaker interactions are possible, which may also affect the electron transfer path of the MOF in some way, promoting fluorescence quenching. 26 In addition, to comprehend the type of quenching, i.e., static or dynamic, fluorescence lifetime measurements using the TCSPC (time-correlated single-photon counting) method were carried out (Fig.…”