A Benzothiadiazole-Based Self-Assembled Cage for Cadmium Detection

Wang, Zongcheng; Tan, Yingzi; Yu, Hui; Bao, Wen‐Hu; Tang, Lin-Li; Zeng, Fei

doi:10.3390/molecules28041841

Cited by 4 publications

(2 citation statements)

References 51 publications

(49 reference statements)

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“…Different heterocycles have been proposed in the literature as signaling units, generally conjugated and planar compounds capable of displaying color and fluorescence. Some examples include imidazoles [132][133][134][135], phenazines [136,137], rhodamines [138][139][140], and coumarins [141][142][143][144], among others [145][146][147][148][149][150][151][152][153][154][155][156][157][158][159][160][161][162].…”

Section: Strategies For Building Mlgs Based On Molecular Architecturementioning

confidence: 99%

Input Selection Drives Molecular Logic Gate Design

Souto,

Dias

2023

Analytica

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Optical detection devices have become an analytical tool of interest in diverse fields of science. The search for methods to identify and quantify different compounds has transposed this curiosity into a necessity, since some constituents threaten the safety of life in all its forms. In this context, 30 years ago, Prof. Prasanna de Silva presented the idea of sensors as Molecular Logic Gates (MLGs): a molecule that performs a logical operation based on one or more inputs (analytes) resulting in an output (optical modification such as fluorescence or absorption). In this review, we explore the implementation of MLGs based on the interference of a second input (second analyte) in suppressing or even blocking a first input (first analyte), often resulting in INHIBIT-type gates. This approach is interesting because it is not related to attached detecting groups in the MLG but to the relation between the first and the second input. In this sense, flexible and versatile MLGs can be straightforwardly designed based on input selection. To illustrate these cases, we selected examples seeking to diversify the inputs (first analytes and interfering analytes), outputs (turn on, turn off), optical response (fluorescent/colorimetric), and applicability of these MLGs.

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Section: Strategies For Building Mlgs Based On Molecular Architecturementioning

confidence: 99%

Input Selection Drives Molecular Logic Gate Design

Souto,

Dias

2023

Analytica

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“…There have been abundant small‐molecule fluorescent probes reported for individual sensing of Zn 2+ or Cd 2+ at present [18–38]. Regretfully, these existing fluorescent molecules could only recognize one of the two metal cations.…”

Section: Introductionmentioning

confidence: 99%

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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A Reusable Fluorescent Molecular Self‐Assembly Cage for Simultaneous Detection and Recycling of Silver(I) Ion

Yu,

Luo,

Luo

et al. 2023

Chemistry An Asian Journal

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Although molecular self‐assembly porous materials capable of ratiometric fluorescence probing and recycling of metal ions are both economically and environmentally attractive, very few current efforts have been devoted. Herein, we demonstrated a three‐dimensional pure organic cage, namely 4‐cage, which can serve as a fluorescent probe for simultaneous ratiometric detection and recycling of Ag+ ion. Taking advantage of the promising emission behavior of its rigidified tetraphenylethylene scaffolds and the chelating ability of its dynamically reversible imine moieties, on one hand, upon the addition of Ag+, 4‐cage undergoes coordination to form a stable but poorly soluble fluorescent complex, Ag+@4‐cage, accompanied by a fluorescence color change from bluish‐green to yellowish‐green. This allows us to differentiate Ag+ from other cations with high selectivity. On the other hand, upon the addition of Cl− ion, Ag+@4‐cage can be effectively converted into free 4‐cage due to the competitive coordination of Cl− with Ag+. Through this process, secondary usage of 4‐cage and the recycling of Ag+ ion can be achieved.

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A Benzothiadiazole-Based Self-Assembled Cage for Cadmium Detection

Cited by 4 publications

References 51 publications

Input Selection Drives Molecular Logic Gate Design

Input Selection Drives Molecular Logic Gate Design

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)

A Reusable Fluorescent Molecular Self‐Assembly Cage for Simultaneous Detection and Recycling of Silver(I) Ion

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