A novel resonance Rayleigh scattering assay for trace formaldehyde detection based on Ce-MOF probe and acetylacetone reaction

A stable and sensitive Au metal organic frameworks resonance Rayleigh scattering nanoprobe for detection of SO32– in food based on fuchsin addition reaction

“…Based on the RRS-ET between CB and DDL, a simple RRS-ET platform was established for the determination of trace ammonium ( 14 ). The RRS spectra of donor Ce-MOF and absorption spectra of acceptor DDL overlap within 325 –500 nm, and a RRS-ET method for formaldehyde was reported by Chen et al ( 15 ).…”

“…The RRS-ET occurs when the compound receptor contacts with the gold nanoparticle donor, leading to the quenching of Rayleigh scattering signal to establish a RRS-ET method for 0.25-64 µmol/L formaldehyde (13). To improve the stability of nanoparticle donor, the liquid crystal, MOFs and covalent organic frameworks (COFs) were studied (13)(14)(15)(16), those were not easy to be accumulated by salt comparing to metal nanoparticles. The stable cholesterol benzoate (CB) nanoparticle was used as donor with a strong RRS peak at 395 nm, ammonium ions reacted with acetylacetone and formaldehyde to form a complex 3,5 diacetyl-1,4 dihydrolutidine (DDL) as receptor.…”

“…Based on the RRS-ET between CB and DDL, a simple RRS-ET platform was established for the determination of trace ammonium (14). The RRS spectra of donor Ce-MOF and absorption spectra of acceptor DDL overlap within 325 -500 nm, and a RRS-ET method for formaldehyde was reported by Chen et al (15). With the steady development of society, people's focus on food has shifted from the initial realization of food and clothing to the pursuit of experience.…”

Aptamer Trimode Biosensor for Trace Glyphosate Based on FeMOF Catalytic Oxidation of Tetramethylbenzidine

“…Metal–organic frameworks (MOFs) are crystalline porous materials with periodic network structures formed by the self-assembly of transition metal ions and organic ligands. It has the advantages of high porosity, low density, large specific surface area, regular pore channels, adjustable pore size, diversity, and tailorability of the topological structure, and is widely used in gas storage, pharmacology, chemical sensing, pollutant separation and chemical catalysis [ 1 , 2 , 3 , 4 ]. Therefore, the preparation and application of MOFs have attracted much attention.…”