Surface enhanced Raman scattering by a new derivative of acridine in solutions of colloidal silver

A new derivative of acridine, 4,5-bis(N,N-di(2-hydroxyethyl)iminomethyl)acridine (BHIA), which is a selective fluorophore relative to cadmium cations, is studied by the method of surface-enhanced Raman scattering (SERS). The SERS spectra of BHIA adsorbed on colloidal silver particles exhibit a high...

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Bibliographic Details
Published in:Optics and spectroscopy 2017-03, Vol.122 (3), p.435-439
Main Authors: Solovyeva, E. V., Khaziyeva, D. A., Myund, L. A., Denisova, A. S.
Format: Article
Language:English
Subjects:
Colloid chemistry
Condensed-Matter Spectroscopy
Lasers
Ligands
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Raman spectra
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Summary:A new derivative of acridine, 4,5-bis(N,N-di(2-hydroxyethyl)iminomethyl)acridine (BHIA), which is a selective fluorophore relative to cadmium cations, is studied by the method of surface-enhanced Raman scattering (SERS). The SERS spectra of BHIA adsorbed on colloidal silver particles exhibit a high intensity and temporal stability of the signal. An assignment of the bands present in the studied spectral range is given. The dependence of the SERS spectra of BHIA on the solution’s pH reveals that the ligand can exist on the surface in protonated and deprotonated forms. The stability of the deprotonated form on the surface suggests that the ligand interacts with the surface by means of a conjugated π-system of aromatic rings. The addition of the salt of halide ions to the solution has a significant influence on the SERS spectrum. This effect is due to the displacement of the adsorbate molecules from the first monolayer, which is accompanied by the transition of BHIA from the chemi- to the physisorbed form.
ISSN:0030-400X
1562-6911
DOI:10.1134/S0030400X17030183