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Fluorescent dinuclear chiral zinc complexes were synthesized in a "one-pot" method in which the lysine-based Schiff base ligand was generated in situ. This complex acts as a highly sensitive and selective fluorescent ON-OFF probe for Cu(2+) in water at physiological pH. Other metal ions such as Hg(2+), Cd(2+), and Pb(2+) gave little fluorescence change.
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http://dx.doi.org/10.1021/ic802314u | DOI Listing |
Anal Chim Acta
November 2025
School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China; Anhui Provincial International Science and Technology Cooperation Base for Major Metabolic Diseases and Nutritional Interventions, Hefei, 230009, China; Intelligent Interconnected Systems Laboratory of A
Background: Copper is a vital trace element that plays a crucial role in various physiological processes due to its ability to exist in multiple oxidation states. Inspired by natural enzymes, researchers have developed copper-based nanozymes that mimic enzyme functions, offering cost-effective and stable alternatives to traditional enzymes. Despite their promising properties, the design and synthesis of these nanozymes can be complex and challenging.
View Article and Find Full Text PDFMikrochim Acta
September 2025
School of Chemical Science and Technology, Yunnan University, Kunming, 650500, China.
A CuFeO/NiCo-LDH heterojunction electrochemical sensor (LDH: layered double hydroxide) was developed for the sensitive detection of tetracycline (TC). The sensor was constructed by integrating ZIF-67-derived nanocage NiCo-LDH on nickel foam with CuFeO, forming a p-n heterojunction that enhanced electron transfer and TC adsorption. The sensor exhibited bilinear detection ranges (0.
View Article and Find Full Text PDFAnal Methods
September 2025
College of Engineering, Jilin Normal University, Siping 136000, Jilin, China.
Glyphosate, a widely used organophosphorus herbicide in agriculture, poses potential threats to aquatic ecosystems and human health due to its long-term environmental persistence. This study presents a spectroscopic detection system based on a competitive reaction utilizing the Ponceau 4R (P4R)-Cu complex. Leveraging glyphosate's high affinity for chelating copper ions, the method enables indirect, rapid, and visual quantitative analysis of glyphosate.
View Article and Find Full Text PDFJ Fluoresc
September 2025
Faculty of Science, Department of Chemistry, Karadeniz Technical University, Trabzon, 61080, Türkiye, Turkey.
A new spectrofluorimetric method has been developed for the selective detection of Cu²⁺ ions based on a benzimidazole-containing Schiff base ligand. In this study, three structurally related Schiff bases (L1, L2, and L3) were synthesized and comparatively investigated for their fluorescence response in the presence of various cations. Among them, only L3 bearing ortho-hydroxyl groups on the aromatic rings exhibited a notable fluorescence quenching effect upon interaction with Cu²⁺, while L1 (para-hydroxyl substituted) and L2 (N, N-dimethylamino substituted) showed limited or no selectivity.
View Article and Find Full Text PDFJ Mater Chem B
September 2025
Amity Institute of Nanotechnology, Amity University Kolkata, Major Arterial Road, AA II, Newtown, Kolkata, West Bengal, 700135, India.
The development of non-toxic, cost-effective and high fluorescent sensing materials has earned significant interest in the last decade. In this work, a simple synthesis technique of mesoporous hydrogen-bonded organic frameworks (HOFs) suitable for the ultrasensitive detection of a commonly used antibiotic, enrofloxacin (ENR), has been reported. The fluorescence of the HOF is completely quenched after the formation of a HOF-Cu complex as a turn off sensor which undergoes a turn-on mechanism in the presence of ENR.
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