Chelidamic acid tautomers in copper(II) compounds. One-pot synthesis, crystal structure, spectroscopic and DFT studies

Wojciechowska, Agnieszka; Janczak, Jan; Jarzembska, Katarzyna N.; Rojek, Tomasz; Gorzsás, András; Kersen, Ulo; Olszewski, Tomasz K.; Jezierska, Julia

doi:10.1016/j.poly.2022.116210

Cited by 1 publication

(2 citation statements)

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“…The characteristic peaks in the regions 1600–1500 and 1400–1300 cm −1 were associated with COO − asymmetric and symmetric stretching, respectively. The bands corresponding to COO − asymmetric stretching were also shifted to 1604 and 1594 cm −1 , respectively [23]. These data revealed the successful complexation of chelidamic acid towards Eu(III) via the N and O sites.…”

Section: Resultsmentioning

confidence: 90%

“…The rigid 120° angle between the central pyridine ring and two carboxylic groups provides multiple possible modes of coordination. The complexes of chelidamic acid with lanthanides are more commonly encountered [23]. Europium (Eu) is known for its unique luminescence properties that arise from transitions between energy levels within the electronic configurations of europium ions.…”

Section: Introductionmentioning

confidence: 99%

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Highly sensitive lanthanide complex as a probe for l‐kynurenine: A cancer biomarker

Varghese,

J. M,

Madanan

et al. 2024

Luminescence

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A lanthanide complex based on europium (Eu) and chelidamic acid was synthesized (Eu–CHE) and characterized. The complex Eu–CHE exhibited intense luminescence at 615 nm under excitation at 300 nm and was further investigated for highly sensitive turn‐off detection of l‐kynurenine (l‐kyn), a cancer biomarker. The probe detected l‐kyn linearly from 6 nM to 0.2 μM with a limit of detection and limit of quantification of 1.37 and 4.57 nM, respectively. The probe was investigated for selectivity towards l‐kyn among co‐existing amino acids and further extended for detecting l‐kyn from human serum and urine samples. A low‐cost paper strip‐based sensing platform was also developed for the visual detection of l‐kyn.

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Section: Resultsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%