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Zn(ii) detection and biological activity of a macrocycle containing a bis(oxadiazole)pyridine derivative as fluorophore
- Source :
- Dalton transactions (Cambridge, England : 2003). 49(22)
- Publication Year :
- 2020
-
Abstract
- The synthesis, photochemical properties, biological effects and the X-ray crystal structure of a fluorescent polyamine macrocycle L are reported. L is a polyamine cyclophane macrocycle in which 2,6-bis(5-(2-methylphenyl)-1,3,4-oxadiazol-2-yl)pyridine (POXAPy) acts as a fluorescent sensor and the polyamine as a metal ion binding unit. L performs as a PET-mediated chemosensor, with a maximum emission wavelength close to 360 nm. This gives rise to a signal that is visible to the naked eye in the blue visible range. L is able to detect the Zn(ii) and Cd(ii) metal ions in an aqueous solution at pH = 7, with the coordination of the ions switching the emission ON through a CHEF effect. In contrast, paramagnetic metal ions like Cu(ii) and Ni(ii) completely quench the already low emission of L at this pH value. L affects the cell survival of a leukemic cellular model (U937) at micromolar concentrations with cell death starting after only 24 h of exposure; starting from a final concentration of 5 μM, L almost completely abrogates the survival of the leukemic cells over 72 h, with a mechanism that is compatible with a genomic DNA interaction.
- Subjects :
- Fluorophore
Macrocyclic Compounds
Cell Survival
Pyridines
Metal ions in aqueous solution
Oxadiazole
ANTIPROLIFERATIVE ACTIVITY
1,3,4-OXADIAZOLES
COMPLEXES
BEHAVIOR
CHEMOSENSOR
SELECTIVITY
COPPER(II)
COPOLYMERS
LIGAND
CELLS
Inorganic Chemistry
chemistry.chemical_compound
Ion binding
Pyridine
Polymer chemistry
Humans
Fluorescent Dyes
Oxadiazoles
Dose-Response Relationship, Drug
Chemistry
Cell Cycle
U937 Cells
Fluorescence
Zinc
Naked eye
4-OXADIAZOLES
Cyclophane
Subjects
Details
- ISSN :
- 14779234
- Volume :
- 49
- Issue :
- 22
- Database :
- OpenAIRE
- Journal :
- Dalton transactions (Cambridge, England : 2003)
- Accession number :
- edsair.doi.dedup.....77d987a7fca62d060b4f8f15ab80df23