Selective and sensitive colorimetric cyanide recognition in aqueous medium and food samples based on Ni(II) complex chemosensor

Chang, Chi‐Jung; Yu, Yuan-Hsiang; Chen, Jemkun; Chen, Ying-Jen; Pundi, Arul; Lee, Ming-Ching; Hsieh, Shih‐Rong

doi:10.1016/j.jphotochem.2023.114815

Cited by 6 publications

(2 citation statements)

References 68 publications

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“…Binding of MG with CN − is also consistent with the fluorescence "turn-on" behavior, and hence, a plausible sensing mechanism has been proposed. 69 The presence of paramagnetic Ni 2+ leads to the poor emission of MG, which upon interaction with CN − through a H•••bonding interaction 70 with imidazolyl N−H and the Ni(II) center of MG displays fluorescence enhancement due to the suppressed internal charge transfer (ICT) behavior. 71 The complex [MG•(CN) 2 ] becomes a donor−acceptor (D-A) conjugated molecule capable of showing enhancement of the fluorescence intensity owing to the ICT mechanism.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Anticounterfeiting Feature of a Writable and Self-Erasable Ni(II)-Metallogel Pad via Fluorescent “Turn-On” Detection of Cyanide

Singh,

Dwivedi,

Pandey

2024

Langmuir

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A Schiff base 5-(2-hydroxy-3-methoxybenzylidieneamino)-1-H-imidazole-4-carboxamide (HL) comprising multibinding sites has been synthesized with the aim of fabricating a supramolecular gel. The gelator HL was characterized by FT-IR, 1 H & 13 C NMR, and ESI-MS techniques and also formed a [Ni(L) 2 ] complex. The gelation property of HL was investigated with various metal ions, wherein Ni(II) selectively forms a mechanically and thermally stable supramolecular metallogel (MG) in the presence of a triethylamine base in DMF-MeOH media. Characterization of MG was accomplished with different spectro-analytical techniques such as FT-IR, ESI-MS, powder-XRD, SEM, rheological investigations, UV/ vis, and fluorescence. The gelator HL displays moderate emission upon addition of Ni 2+ and gives "turn-off" fluorescence output by forming the complex [Ni(L) 2 ] (MG) due to the chelation-enhanced quenching of fluorescence (CHEQ). Job plot and ESI-MS data suggested a 2:1 stoichiometry between HL and Ni(II) in MG. Further, MG exhibited highly selective and ultrasensitive "turn-on" fluorescence signaling with CN − in the background presence of several cations and anions. The limit of detection (LoD) of MG was determined to be 6.9 × 10 −9 M for CN − using the fluorescence technique. Notably, MG behaves as a fluorescent writable pad material explicitly with CN − under 365 nm UV light but not under ordinary light and the fluorescent text is self-erased after 15 min. Hence, MG can be used as a metallogel pad in the presence of CN − to communicate secret messages. Overall, the present work explores the fabrication of a thermo-and mechanostable Ni(II)-metallogel (MG), which selectively and ultrasensitively detects CN − both in the solution phase and in the gel form, wherein MG behaves as a writable and self-erasable pad with anticounterfeiting features for practical applications.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Anticounterfeiting Feature of a Writable and Self-Erasable Ni(II)-Metallogel Pad via Fluorescent “Turn-On” Detection of Cyanide

Singh,

Dwivedi,

Pandey

2024

Langmuir

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“…This property is used in some wastewater treatment processes to remove cyanide from industrial effluents. However, this is both more expensive and can lead to the formation of different toxic substances, although relatively less. , Therefore, it may be more beneficial to use organic-based binders for the determination and removal of cyanide ions . Hence, cyanide ion detection is important for human health care and environmental protection.…”

Section: Introductionmentioning

confidence: 99%

Off-On–Off Cascade Recognition of Cyanide, Mercury, and Aluminum Using N/5-Monosubstituted Rhodanines

Bayindir,

Hussein

2024

ACS Omega

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This study aims to synthesize N-and 5-monosubstituted rhodanine derivatives as ion-sensing organics and investigate their sensing abilities. Following an easy and green approach to synthesis, the anion-sensing properties of the rhodanines were studied using colorimetric detection and spectroscopic methods. As a result of studies, rhodanines are found to be highly solventcontrolled colorimetric and fluorescent cyanide, mercury, and aluminum sensors. The stoichiometry of the interaction between CN − and both probes was determined to be 1:1 using Job's plot analysis. The binding constants (K s ) of CN − to 5-arylRh and N-arylRh were calculated to be 3.25 × 10 4 and 7.07 × 10 4 M −1 , respectively, demonstrating their high affinity for cyanide ions. The limits of detections for the 5-arylRh and N-arylRh were also determined as 356 and 617 nM, respectively. In addition to detecting CN − , 5-arylRh also serves as a specific turn-off sensor for mercury and aluminum when cyanide and hydroxide are present. This enables the fluorescence intensity to be toggled on/off by alternating the addition of CN − /OH − and Hg 2+ /Al 3+ . Furthermore, the LOD values for Hg 2+ and Al 3+ with 5-arylRh−CN − and 5-arylRh−OH − were determined to be 414 nM and 1.35 μM, respectively. Furthermore, the turn-on binding mechanisms of 5-arylRh and N-arylRh with cyanide ions were elucidated, and the experimental band gap (highest occupied molecular orbital/least unoccupied molecular orbital) energy values corroborated the proposed mechanism. Additionally, the interaction mechanism of the probes with CN − was further investigated by using the 1 H NMR technique. Collectively, these findings suggest that 5-arylRh, N-arylRh, and 5-arylRh−CN − hold promise as selective and sensitive candidate sensors for CN − , Hg 2+ , and Al 3+ ions.

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Recent developments in the preparation, characterization, and applications of chemosensors for environmental pollutants detection

Pundi

Chang

2023

Journal of Environmental Chemical Engineering

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Selective and sensitive colorimetric cyanide recognition in aqueous medium and food samples based on Ni(II) complex chemosensor

Cited by 6 publications

References 68 publications

Anticounterfeiting Feature of a Writable and Self-Erasable Ni(II)-Metallogel Pad via Fluorescent “Turn-On” Detection of Cyanide

Anticounterfeiting Feature of a Writable and Self-Erasable Ni(II)-Metallogel Pad via Fluorescent “Turn-On” Detection of Cyanide

Off-On–Off Cascade Recognition of Cyanide, Mercury, and Aluminum Using N/5-Monosubstituted Rhodanines

Recent developments in the preparation, characterization, and applications of chemosensors for environmental pollutants detection

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