A versatile sensor capable of ratiometric fluorescence detection of trace water and turn-on detection of Cu 2+ modulating the binding interaction of a Cu(II) complex with BSA and DNA complemented by docking studies.
Vishnu SAnish NagAvijit Kumar DasPublished in: Analytical methods : advancing methods and applications (2024)
A fluorescent molecule, pyridine-coupled bis-anthracene (PBA), has been developed for the selective fluorescence turn-on detection of Cu 2+ . Interestingly, the ligand PBA also exhibited a red-shifted ratiometric fluorescence response in the presence of water. Thus, a ratiometric water sensor has been utilized as a selective fluorescence turn-on sensor for Cu 2+ , achieving a 10-fold enhancement in the fluorescence and quantum yield at 446 nm, with a lower detection limit of 0.358 μM and a binding constant of 1.3 × 10 6 M -1 . For practical applications, sensor PBA can be used to detect Cu 2+ in various types of soils like clay soil, field soil and sand. The interaction of the PBA-Cu(II) complex with transport proteins like bovine serum albumin (BSA) and ct-DNA has been investigated through fluorescence titration experiments. Additionally, the structural optimization of PBA and the PBA-Cu(II) complex has been demonstrated by DFT, and the interaction of the PBA-Cu(II) complex with BSA and ct-DNA has been analyzed using theoretical docking studies.
Keyphrases
- single molecule
- living cells
- energy transfer
- fluorescent probe
- sensitive detection
- aqueous solution
- quantum dots
- loop mediated isothermal amplification
- atomic force microscopy
- label free
- metal organic framework
- molecular dynamics
- computed tomography
- circulating tumor
- real time pcr
- heavy metals
- risk assessment
- molecular dynamics simulations
- hydrogen peroxide
- magnetic resonance imaging
- drinking water
- contrast enhanced
- image quality
- photodynamic therapy
- density functional theory
- dna binding
- high resolution
- protein protein
- binding protein
- circulating tumor cells