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Rational design of highly sensitive and rapid fluorescent probes is a major concern of analytical methods. Here, we synthesized two Ln‐PFTA with different metal nodes (Dy, Sm) by simple hydrothermal self‐assembly using 3‐fluorobiphenyl‐3′,4,5′‐tricarboxylic acid (H2PFTA) as ligand. As a ratio sensor for detecting riboflavin (RF), it has self‐calibration effect, ultra‐low detection limit (0.225 nM), excellent durability, and high selectivity. In order to add practicality, even in actual samples (fetal bovine serum, tablets, and milk), the recovery rate is as high as 92%–104%, which is considered to be an excellent luminescent sensor for detecting RF. According to the survey, there are few studies on the detection of RF by fluorescence spectroscopy. In addition, there is fluorescence resonance energy transfer (FRET) between the processes of Ln‐PFTA detecting RF, and the peak intensity change of Ln‐PFTA is attributed to its modulated luminescence characteristics. At the same time, it also shows the best FRET efficiency for detecting RF. [ABSTRACT FROM AUTHOR]

A large amount of Cr2O72− and glyphosate (GLYP) discharge cause serious water pollution. In this paper, two new MOFs (Zn‐DPIA and Cd‐DPIA) were synthesized, which have excellent selectivity and sensitivity in the detection of Cr2O72− and GLYP. The detection limits (LODs) of Zn‐DPIA sensing Cr2O72− and GLYP were 1.37 and 1.92 μM, respectively, and the LODs of Cd‐DPIA sensing Cr2O72− and GLYP were 1.19 and 1.42 μM, respectively. Cr2O72− and GLYP detection based on Zn‐DPIA and Cd‐DPIA in tap water is highly reliable based on high recovery rates (97% to 106% and 95% to 103%), indicating that Zn‐DPIA and Cd‐DPIA have practical application prospects. [ABSTRACT FROM AUTHOR]

Two novel 2‐(1,2,4‐triazol‐1‐yl)‐4‐pyridyl acid complexes with Cu(ClO4)2 ⋅ 6H2O and Co(NO3)2 ⋅ 6H2O were synthesised and their biological activities were systematically studied in vitro. The interaction between the complex and DNA was determined by UV spectroscopy, yielding binding constants of 6.63×103 and 6.09×103, respectively. The DNA binding abilities of the complexes were also investigated using fluorescence spectroscopy, showing quenching values of 0.13 and 0.08, respectively. Agarose gel electrophoresis showed that both the copper and cobalt complexes could effectively cleave DNA. In addition, flow cytometry, cell morphology detection, and MTT assays showed that the synthesised complex induced apoptosis The experimental results show that the copper complexes have promising medicinal value as potential anticancer drugs. [ABSTRACT FROM AUTHOR]

Antibiotic residues are currently an increasing threat for human health and the ecosystem, and specific and rapid real‐time sensing of antibiotics is a big challenge. To realize specific sensing by rapid fluorescent sensors, a lanthanide metal‐organic framework (MOF) containing dual emissive centers has been developed with high sensing selectivity and sensitivity. Owing to the self‐calibration ability, the dual‐center Tb‐MOF exhibits higher selectivity towards furazolidone (FZD) and nitrofural (NZF) among the reported MOF sensors. Additionally, the corresponding ratiometric detection mode also realized specific sensing of other tested antibiotics. Besides, the single‐Tb3+‐based dual‐emission MOF in this work is expected to support the development of fluorescent sensors with high sensitivity and selectivity for environmental safety purposes. [ABSTRACT FROM AUTHOR]