Aqueous Conversion of Fructose Phosphate Precursor Nanoparticles into Emissive C‐Dot Composite Nanoparticles. Issue 8 (10th June 2021)

• Record Type: Journal Article
• Authors: Sabljo, Kristina; Popescu, Radian; Michenfelder, Nadine C.; Unterreiner, Andreas‐Neil; Gerthsen, Dagmar; Feldmann, Claus
• Is Part Of: ChemNanoMat. Volume 7:Issue 8(2021)
• Page Start: 916
• Page End: 926
• Publication Date: 2021-06-10
• Subjects: Carbon dots -- Fructose -- Aqueous synthesis -- Phosphate matrix -- Fluorescence; Nanochemistry -- Periodicals; Nanostructured materials -- Periodicals; Nanochemistry; Nanostructured materials; Periodicals; 541.2
• DOI: 10.1002/cnma.202100193
• Languages: English
• ISSNs: 2199-692X

Abstract

Abstract: A one‐pot, fully water‐based synthesis of blue‐ and red‐emitting C‐dots is presented. To this concern, [ZrO] 2+ [F6P] 2− and [Eu(OH)] 2+ [F6P] 2− precursor nanoparticles (F6P: D‐fructose‐6‐phosphate) are prepared in water and converted to C‐dot@[ZrO] 2+ [HPO4 ] 2− and C‐dot@[Eu(OH)] 2+ [HPO4 ] 2− composite nanoparticles in boiling water (100 °C) via microwave heating. Composition, structure, and fluorescence of the composite nanoparticles are validated by different analytical methods (e. g., FT‐IR, EA, TG, DLS, SEM, TEM, EDXS). The resulting aqueous suspensions are characterized by high colloidal stability and intense emission. Specifically, C‐dot@[Eu(OH)] 2+ [HPO4 ] 2− exhibits Eu 3+ ‐type red emission in water. The one‐pot water‐based synthesis with fructose‐containing precursor nanoparticles and the structure of the phosphate‐stabilized C‐dot composite nanoparticles are reported for the first time. Abstract : [ZrO] 2+ [F6P] 2 − and [Eu(OH)] 2+ [F6P] 2 − precursor nanoparticles (F6P: D‐fructose‐6‐phosphate) are converted in a one‐pot, aqueous approach to C‐dot@[ZrO] 2+ [HPO4 ] 2− and C‐dot@[Eu(OH)] 2+ [HPO4 ] 2− composite nanoparticles. Herein, the C‐dots (2–3 nm) are embedded in a dense zirconyl/europium phosphate matrix. The resulting composite nanoparticles (40–50 nm) are well‐dispersible in water and show blue and red emission.