Triazole-stabilized fluorescence sensor for highly selective detection of copper in tea and animal feed

Qiu, Suyan; Wei, Yihua; Tu, Tianhua; Xiang, Jianjun; Zhang, Dawen; Chen, Qinglong; Luo, Lijun; Lin, Zhenyu

doi:10.1016/j.foodchem.2020.126434

Cited by 17 publications

(5 citation statements)

References 33 publications

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“…The catalysis activity was enhanced with longer DNA strands and a higher proportion of cytosine relative to the other nucleotides [ 168 ]. Qiu et al used Tris-(benzyltriazolylmethyl) amine (TBTA) to improve the sensitivity and stability of the sensing system to achieve sensitive detection of Cu [ 169 ].…”

Section: Challenges and Future Directions For Nanozyme Researchmentioning

confidence: 99%

Nanozymes—Hitting the Biosensing “Target”

Darland

Zhao

2021

Sensors

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Nanozymes are a class of artificial enzymes that have dimensions in the nanometer range and can be composed of simple metal and metal oxide nanoparticles, metal nanoclusters, dots (both quantum and carbon), nanotubes, nanowires, or multiple metal-organic frameworks (MOFs). They exhibit excellent catalytic activities with low cost, high operational robustness, and a stable shelf-life. More importantly, they are amenable to modifications that can change their surface structures and increase the range of their applications. There are three main classes of nanozymes including the peroxidase-like, the oxidase-like, and the antioxidant nanozymes. Each of these classes catalyzes a specific group of reactions. With the development of nanoscience and nanotechnology, the variety of applications for nanozymes in diverse fields has expanded dramatically, with the most popular applications in biosensing. Nanozyme-based novel biosensors have been designed to detect ions, small molecules, nucleic acids, proteins, and cancer cells. The current review focuses on the catalytic mechanism of nanozymes, their application in biosensing, and the identification of future directions for the field.

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Section: Challenges and Future Directions For Nanozyme Researchmentioning

confidence: 99%

Nanozymes—Hitting the Biosensing “Target”

Darland

Zhao

2021

Sensors

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“…In last few years, it has stimulated great interest from researchers and has been applied to many fields such as ion detection. [ 23–29 ] Although some selective fluorescent chemosensors of Cu 2+ have been synthesized, [ 9,30–36 ] it is still arduous to apply them in aqueous solutions. It is therefore of great importance to develop fluorescent sensors with excellent selectivity and sensitivity to assay Cu 2+ in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

A highly selective fluorescence and absorption sensor for rapid recognition and detection of Cu²⁺ ions in aqueous solution and film

Zhong

Jiang

et al. 2022

Luminescence

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A fluorescence and absorption chemosensor (SAAT) based on 5‐(hydroxymethyl)‐salicylaldehyde (SA) and o‐aminothiophenol (AT) was designed and synthesized. SAAT in DMSO–HEPES (20.0 mM, v/v, 1:99, pH = 7.0) solution shows a highly selective and sensitive absorption and an ‘on–off’ fluorescence response to Cu2+ ions in aqueous solutions over all other competitive metal ions including Na+, Ag+, Ba2+, Ca2+, Cd2+, Mg2+, Zn2+, Cr3+, Al3+, Hg2+, K+, Mn2+, Ni2+, Sr2+, Tb3+ and Co2+. SAAT exhibits ratiometric absorption sensing ability for Cu2+ ions. Importantly, SAAT also can sense Cu2+ ions using fluorescence quenching, the fluorescence intensity of SAAT showed a good linear relationship with Cu2+ concentration, and the detection limit of Cu2+ was 0.34 μM. The results of Job's plot, Benesi–Hildebrand plot, mass spectra, and density functional theory calculations confirmed that the selective absorption and fluorescence response were attributed to the formation of a 1:1 complex between SAAT and Cu2+. SAAT in test film could identify Cu2+ in water samples using the intuitive fluorescence colour change under a UV lamp. SAAT has great application value as a selective and sensitive chemosensor to discriminate and detect Cu2+ ions.

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“…The fluorescence method has the characteristics of dual detection of intensity change and color change and has been widely studied. , For example, Qiu et al developed a triazole-stabilized fluorescent sensor and successfully used it for copper detection in complex tea samples and chicken feed samples. Among them, Tris-(benzyl-triazolylmethyl)amine (TBTA) was used to improve the sensitivity and stability of the sensing system . Awad et al synthesized a hematoporphyrin functionalized graphene oxide (HP-GO) fluorescent sensor through the esterification reaction between graphene oxide and hematoporphyrin (HP) .…”

Section: Introductionmentioning

confidence: 99%

“…Among them, Tris-(benzyl-triazolylmethyl)amine (TBTA) was used to improve the sensitivity and stability of the sensing system. 16 Awad et al synthesized a hematoporphyrin functionalized graphene oxide (HP-GO) fluorescent sensor through the esterification reaction between graphene oxide and hematoporphyrin (HP). 17 Due to the presence of a nitrogen heterocycle on the surface of HP-GO, which has a high binding affinity to Cu 2+ , HP-GO has good selectivity and anti-interference ability to Cu 2+ .…”

Section: ■ Introductionmentioning

confidence: 99%

Blue Carbon Dot-Based Portable Smartphone Platform for Visualization of Copper(II)

Pan

Yang

et al. 2022

ACS Appl. Nano Mater.

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The acidic soil where tea grows makes the accumulation of copper ions (Cu2+) easy. Long-term drinking of tea infusions and tea beverages will cause abnormal accumulation of copper in the human body and endanger human health. Herein, we designed a visual portable smartphone platform based on ratiometric fluorescent nanoprobes for the rapid, real-time, and sensitive detection of Cu2+ in tea and tea beverages. We synthesized the ratiometric fluorescent nanoprobe formed by blue carbon dots (BCDs), which are used as internal standards, and a sensing reagent (diethyl-[5-(2-1,4,7,10-tetraaza-cyclododec-1-yl-acetylamino)-benzo[α]phenoxazin-9-ylidene]-ammonium (cyclen-NB)) for Cu2+. With an excitation wavelength of 330 nm, the emission wavelengths of cyclen-NB and BCDs are 674 and 451 nm, respectively. Cyclen-NB effectively captures Cu2+ to form a metal complex via a ligand-to-metal charge transfer (LMCT), resulting in obvious color changes from red to blue-violet. The designed ratiometric fluorescent nanoprobe has high sensitivity, good selectivity, and strong anti-interference ability, and the detection limit can be as low as 1.37 nM. Furthermore, a visual portable sensing platform was constructed based on the ratiometric fluorescent nanoprobe in combination with smartphones. The color recognition software of the smartphone can convert the color information of the photos taken by the mobile phone into digital data for analysis; and the detection limit is as low as 4.83 nM, and the yield rate is 86.79–111.20% (RSD ≤ 4.95). Therefore, the method reported in this manuscript can provide a convenient method for rapid on-site and visual inspection of tea and tea beverages for food safety.

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Triazole-stabilized fluorescence sensor for highly selective detection of copper in tea and animal feed

Cited by 17 publications

References 33 publications

Nanozymes—Hitting the Biosensing “Target”

Nanozymes—Hitting the Biosensing “Target”

A highly selective fluorescence and absorption sensor for rapid recognition and detection of Cu²⁺ ions in aqueous solution and film

Blue Carbon Dot-Based Portable Smartphone Platform for Visualization of Copper(II)

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Triazole-stabilized fluorescence sensor for highly selective detection of copper in tea and animal feed

Cited by 17 publications

References 33 publications

Nanozymes—Hitting the Biosensing “Target”

Nanozymes—Hitting the Biosensing “Target”

A highly selective fluorescence and absorption sensor for rapid recognition and detection of Cu2+ ions in aqueous solution and film

Blue Carbon Dot-Based Portable Smartphone Platform for Visualization of Copper(II)

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A highly selective fluorescence and absorption sensor for rapid recognition and detection of Cu²⁺ ions in aqueous solution and film