New Schiff base probe for the fluorometric turn-on sensing of Cd2+ ions and bio-imaging application

Yang, Jing; Han, Jia; Shang, Zhuo Bin; Wang, Yu; Shuang, Shao Min

doi:10.1016/j.jlumin.2022.119017

Cited by 12 publications

(1 citation statement)

References 38 publications

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“…By monitoring the variation in the fluorescence intensity ratio at 398 and 472 nm (Ex.342 nm), NIS is able to monitor Cd 2+ with a detection limit of 3.87 × 10 −7 M. It has also been successfully utilized for the detection of human liver cancer cells (SMMC-7721), zebrafish, and other in vivo tissues. BPC is an imidazolebased fluorescent probe modified with 4-cyanobiphenyl [97]. It can recognize Cd 2+ in ACN/Tris-HCl buffer (3:2, v/v, pH = 7.4), eliciting a significant color change (from colorless to yellow), fluorescence turn-on at 547 nm, and has a detection limit of 1.05 × 10 −8 M. The 1:1 complex formation between BPC and Cd 2+ can block both isomerization of C-N and the ESIPT process; meanwhile, it enhances the molecular rigidity, resulting in chelation-enhanced fluorescence (CHEF).…”

Section: Imidazole-based Fluorescent Probesmentioning

confidence: 99%

Recent Progress on Fluorescent Probes in Heavy Metal Determinations for Food Safety: A Review

et al. 2023

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One of the main challenges faced in food safety is the accumulation of toxic heavy metals from environmental sources, which can sequentially endanger human health when they are consumed. It is invaluable to establish a practical assay for the determination of heavy metals for food safety. Among the current detection methods, technology based on fluorescent probes, with the advantages of sensitivity, convenience, accuracy, cost, and reliability, has recently shown pluralistic applications in the food industry, which is significant to ensure food safety. Hence, this review systematically presents the recent progress on novel fluorescent probes in determining heavy metals for food safety over the past five years, according to fluorophores and newly emerging sensing cores, which could contribute to broadening the prospects of fluorescent materials and establishing more practical assays for heavy metal determinations.

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Section: Imidazole-based Fluorescent Probesmentioning

confidence: 99%

Recent Progress on Fluorescent Probes in Heavy Metal Determinations for Food Safety: A Review

et al. 2023

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A single 8‐hydroxyquinoline‐appended bile acid fluorescent probe obtained by click chemistry for solvent‐dependent and distinguishable sensing of zinc(II) and cadmium(II)

Zhang,

Zou,

Liu

2023

Luminescence

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Construction of fluorescent probes for zinc ion (Zn2+) and cadmium ion (Cd2+) is significant for the safety of humans. However, the discriminating recognition of Zn2+ and Cd2+ by a single probe remains challenging owing to their similar properties. Herein, a novel deoxycholic acid derivative containing 8‐hydroxyquinoline fluorophore has been facilely synthesized through click chemistry to form a clamp‐like probe. Using its perfect bonding cavity from 1,2,3‐triazole and quinoline, this molecule showed favorable solvent‐dependent fluorescent responses and distinguished Zn2+ and Cd2+ in different solvents. In ethanol aqueous solution, it displayed good selectivity and ratiometric fluorescence to Zn2+ with 30 nm spectroscopic red‐shifts. In acetonitrile aqueous solution, it exhibited good selectivity and ratiometric fluorescence to Cd2+ with 18 nm spectroscopic red‐shifts. Moreover, the unique microstructural features of the probe in assembly were used to reflect its recognition processes. Due to its merits of low detection limit and instant response time, the probe was utilized for sensing Zn2+ and Cd2+ in water, beer and urine with high accuracy. Meanwhile, this probe served as a handy tool and was employed to obtain inexpensive test strips for the prompt and semiqualitative analysis of Zn2+ and Cd2+ with the naked eye.

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Heavy metal ions monitoring using molecular ligands: Optical properties and analytical performances

Mohan,

Kadiyan,

Virender

et al. 2024

Vietnam Journal of Chemistry

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Heavy metal ions are resistant to degradation and pollute a wide range of natural resources found in the environment, such as water. Detecting heavy metals is crucial for monitoring environmental safety and preventing the harmful effects of metal ion exposure. Therefore, this study has focused on Schiff‐base chemosensors, due to their efficacy in detecting metal ions, owing to their simplicity, cost‐effectiveness, rapid photophysical response, greater sensitivity, minimum detection limit, and applicability to the environmental and medical domains. Such chemosensors are crucial for ensuring public health and safety because they offer a feasible and efficient way to monitor concentrations of heavy metals. This review focuses on using spectroscopic chemosensors to detect Pb2+, Cd2+, and Hg2+ ions. The discussion includes the mechanisms and signal change properties of these chemosensors, as well as critical factors such as the limit of detection, binding stoichiometry ratio, association constant, appropriate pH, and structure. The article concludes with key findings and future perspectives, emphasizing the crucial role of metal ion monitoring devices in protecting the environment and human health.

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New Schiff base probe for the fluorometric turn-on sensing of Cd2+ ions and bio-imaging application

Cited by 12 publications

References 38 publications

Recent Progress on Fluorescent Probes in Heavy Metal Determinations for Food Safety: A Review

Recent Progress on Fluorescent Probes in Heavy Metal Determinations for Food Safety: A Review

A single 8‐hydroxyquinoline‐appended bile acid fluorescent probe obtained by click chemistry for solvent‐dependent and distinguishable sensing of zinc(II) and cadmium(II)

Heavy metal ions monitoring using molecular ligands: Optical properties and analytical performances

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