Issue 24, 2022

A ratiometric luminescence pH sensor based on YAG:V3+,V5+ nanoparticles

Abstract

A new type of ratiometric luminescence-based pH sensor is described. The spatial segregation of vanadium ions of different oxidation states within the Y3Al5O12 (YAG) nanoparticles induces a difference in the susceptibility of their spectroscopic properties to a change in the pH of the medium. Hence, the emission intensity of V5+ localized mainly in the surface part of nanocrystals is more efficiently quenched by vibrational modes of hydroxyl groups compared to that of V3+ localized mainly in the inner part of the nanocrystal. Thus, their emission intensity ratios were found to be monotonically pH dependent in the 2–11 range, with a high relative sensitivity of SRmax of 6%/pH at 7 pH. To the best of our knowledge, this is the first ratiometric luminescence pH sensor based on transition metal ions.

Graphical abstract: A ratiometric luminescence pH sensor based on YAG:V3+,V5+ nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
31 Mar 2022
Accepted
16 May 2022
First published
17 May 2022

New J. Chem., 2022,46, 11562-11569

A ratiometric luminescence pH sensor based on YAG:V3+,V5+ nanoparticles

K. Kniec and L. Marciniak, New J. Chem., 2022, 46, 11562 DOI: 10.1039/D2NJ01595A

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