Molecular insights into the sensitivity detection mechanism of fluorescent 2D Zr-BTB for 2,4-dinitrophenol

Abstract

There has been an investigation to detect nitroaromatic compounds (NACs) using fluorescent metal-organic frameworks (MOFs). However, the vagueness of the sensing mechanism has hindered the development of efficient sensors. Here...

Two-Dimensional Metal–Organic Frameworks/Epoxy Composite Coatings with Superior O2/H2O Resistance for Anticorrosion Applications

“…Synthesis of BA-ZrBTB and ZrBTB. ZrBTB powder was synthesized by following the procedure reported in our previous studies, 40,41 with the use of benzoic acid as the modulator during the growth of MOF and the treatment in the HCl/DMSO mixture to fully remove the capping benzoate coordinated on the nodes. By following the synthetic procedure reported previously, 40 the 2D MOF sample was also activated without performing the removal of coordinated benzoate groups, and the obtained material was named "BA-ZrBTB".…”

“…The bulk atomic structure of ZrBTB is constructed with a space group of P 3̅ based on experimental research . It comprises one atomic unit of Zr 6 (μ 3 -O) 4 (μ 3 -OH) 4 ­(BTB) 2 (OH) 6 (H 2 O) 6 within a unit cell.…”

“…It comprises one atomic unit of Zr 6 (μ 3 -O) 4 (μ 3 -OH) 4 ­(BTB) 2 (OH) 6 (H 2 O) 6 within a unit cell. The lattice parameters and atomic positions of ZrBTB are determined through powder X-ray diffraction data . It should be noted that experimental research did not reveal the positions and content of H atoms; hence, H atoms were manually added to the O atoms bonded to Zr centers to balance the overall charge.…”

AIE-active cyclometalated iridium(iii) complexes for highly efficient picric acid detection in aqueous media

“…34–37 Among the various nitroaromatic compounds, 2,4,6-trinitrophenol (TNP), commonly known as picric acid (PA), is one of the most widely used materials in military, industry, and terrorist attacks due to its low cost compared to TNT. 38–40 PA is a health hazard that decomposes at high temperatures and forms irritating/toxic gases, such as nitrogen oxides; it is a strong irritant to the skin/eyes and causes prospective damage to organs involved in the respiratory system and the liver when it comes into contact with the human body. 41–43 Furthermore, due to its good water solubility, animals and humans absorb PA through soil and groundwater contamination.…”

“…45–47 Various methods have been developed to meet the demand for the detection of PA; among them, luminescent sensors show more advantages in terms of sensitivity, selectivity, ease of operation, and real-time detection. 40,45,48,49 Although several fluorescent probes have been reported for the detection of PA, most of them exhibit a turn-off fluorescent response to PA through either a photoinduced electron transfer (PET) quenching process or an intermolecular energy transfer mechanism. 50,51 Although several π-electron-rich fluorescent organic chemosensors, organic polymers, and metal−organic frameworks have been employed to detect the presence of electron-deficient nitro-aromatics, 52–57 the development of a suitable and efficient iridium( iii ) complex-based probe with high selectivity for PA is still very rarely reported.…”