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Polystyrenesulfonate-coated nanoparticles with low cytotoxicity for determination of copper(II) via the luminescence of Tb(III) complexes with new calix[4]arene derivatives
Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Kazan.
Kazan National Research Technological University.
Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Kazan.
Zavoisky Physical-Technical Institute, Federal Research Center “Kazan Scientific Center of RAS”, Kazan.
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2018 (English)In: Microchimica Acta, ISSN 0026-3672, E-ISSN 1436-5073, Vol. 185, no 8, article id 386Article in journal (Refereed) Published
Abstract [en]

The authors describe new ligands with two 1,3-diketone groups and two heteroaromatic (pyridyl or quinolyl) moieties embedded to the upper and lower rims of dibromo-substituted calix[4]arene scaffold. The ligands bind Tb(III) ions in alkaline DMF solutions to form 1:1 complexes. The strong Tb(III)-centered luminescence (with excitation/emission peaks at 330/545 nm) of the complexes results from efficient ligand-to-metal energy transfer. The complexes were incorporated into polystyrenesulfonate (PSS) colloids by diluting a DMF solution of the complex with aqueous solution of PSS. The luminescence of the colloids is quenched by copper(II), and this was used to develop a method for its fluorometric determination in nanomolar concentrations. The lower limit of detection is 0.88 nM. Quenching is a result of (a) ion exchange which converts the terbium complexes into their copper counterparts, and (b) energy transfer from Tb(III) to Cu(II) complexes. The low cytotoxicity of the colloidal nanoprobe conceivably makes it a promising tool for use in cellular imaging.

Place, publisher, year, edition, pages
Springer, 2018. Vol. 185, no 8, article id 386
National Category
Probability Theory and Statistics
Research subject
Mathematical Statistics
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URN: urn:nbn:se:ltu:diva-70214DOI: 10.1007/s00604-018-2923-2ISI: 000440096800002PubMedID: 30043251Scopus ID: 2-s2.0-85050586073OAI: oai:DiVA.org:ltu-70214DiVA, id: diva2:1236868
Note

Validerad;2018;Nivå 2;2018-08-06 (andbra)

Available from: 2018-08-06 Created: 2018-08-06 Last updated: 2018-08-09Bibliographically approved

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