Ternary complex formation between Nickel(II)–Dipicolinic acid with small blood serum bioligands

Ramirez, Dayana; Martínez, José Daniel; Araujo, Mary Lorena; Brito, Felipe; Pérez, Alejandro; Hernández, Lino; Carpio, Edgar Del; Lubes, Vito

doi:10.1016/j.molliq.2016.06.068

Cited by 4 publications

(1 citation statement)

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“…Because of its low toxicity, the ligand has recently gained so much interest, making it useful in applications involving biological studies, chemical sensing and environmental remediation [2,3]. To the best of what we know, the crystal structures of dipicolinic acid with Cu(II), Zn(II), Ni(II) and Co(III) have been reported [4][5][6][7]. Also, some other N, O-donor complexes have been studied for their photoluminescent properties [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Co-Crystallised Cobalt(II) Cluster of Pyridinedicarboxylic Acid (PDC) as a Luminescent Material for Selective Sensing of Methanol

et al. 2021

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A luminescent Cobalt(II) co-crystal [Co13(PDC)16(H2O)24.7H2O] 1 (where H2PDC = 2,6pyridinedicarboxylic acid) have been prepared by oven-heating and slow evaporation of solvent. Single crystal X-ray diffraction (SCXRD) analysis revealed that 1 is a mixture of complexes that crystallizes in the triclinic space group P-1 and the geometry around the Co(II) ions is octahedral. The structure is extensively imbued with hydrogen bonding that helps in stabilizing the complex. Thermogravimetric analysis indicates that 1 is thermally stable up to 364 ο C. The luminescence properties of 1 revealed a strong emission centered at 437 nm (λex = 345 nm) assigned to ligand to metal charge transfer (LMCT). The luminescence sensing of 1 towards volatile organic molecules were also examined. However, 1 displayed a turn off towards methanol compared to other molecules with high quenching efficiency and low limit of detection (3.5 x 10 -4 vol%). The results show excellent selectively and high sensitivity.Powder X-ray diffraction studies revealed that the structural integrity of the complex was maintained after exposure to methanol vapour. Theoretical studies also revealed small binding energy (-413.2 au) and low energy gap (1.19) for 1-CH3OH adduct.

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