A ratiometric luminescence pH sensor based on YAG:V3+, V5+ nanoparticles. (30th May 2022)

• Record Type: Journal Article
• Authors: Kniec, K.; Marciniak, L.
• Is Part Of: New journal of chemistry. Volume 46:Number 24(2022)
• Page Start: 11562
• Page End: 11569
• Publication Date: 2022-05-30
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj01595a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A new type of ratiometric luminescence-based pH sensor is described. Abstract : A new type of ratiometric luminescence-based pH sensor is described. The spatial segregation of vanadium ions of different oxidation states within the Y3 Al5 O12 (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 V 5+ localized mainly in the surface part of nanocrystals is more efficiently quenched by vibrational modes of hydroxyl groups compared to that of V 3+ 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 S Rmax 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.