Carbon dots structural characterization by solution-state NMR …
2021年10月30日 · Solution-state NMR spectroscopy suggests PDs and/or PCDs Cdots structures. DFT calculations propose a core–shell structure which explains experimental features. The methodology employed could structurally characterize other kinds of Cdots.
(a) 1 H-NMR and (b) 13 C-NMR spectra of the carbon dots.
Nitrogen-doped carbon dots (NCDs), exhibiting strong yellow emission in aqueous solution and solid matrices, have been utilized for fabricating heterostructure white electroluminescence...
A deep investigation into the structure of carbon dots
2021年3月1日 · This graphic illustrates the stark distinction in properties between certain carbon dots (CDs). This work highlights the large diversity of properties among CDs and endeavors to go beyond the spherical shape typically associated with this material to see the core structure and understand the formation of CDs. Download: Download high-res image ...
Properties, synthesis, and applications of carbon dots: A review
2023年9月1日 · Carbon dots (CDs) refer to a class of carbon-based nanoparticles with various subgroups based on their crystallinity and morphology. CDs offer tuneable physical, chemical, and optical properties, which can be controlled using simple one-pot synthesis techniques.
Photoluminescence mechanism of carbon dots: triggering high …
2021年11月25日 · Systematic analysis reveals that the protonation of 2,3-diaminophenazine changes the molecular state of Carbon Dots, decreases the photon transition band gap, and triggers red fluorescence...
Deep insights to explain the mechanism of carbon dot formation …
2023年3月13日 · 1 H-NMR findings, concurring with 13 C-NMR and FT-IR results, suggest combining 1 H-NMR with 13 C-NMR and FT-IR spectroscopy in a clearer and more in-depth examination of the structure and mechanism of carbon dot formation.
Carbon-dot organic surface modifier analysis by solution-state NMR …
2013年6月18日 · In this article, we report the structural analysis of the surface modifiers of three different types of C-dot nanoparticles (Cwax, Cws, and Csalt) by use of 1D- and 2D-high-resolution NMR spectroscopy in solution.
Insights into glucose-derived carbon dot synthesis via Maillard ...
2024年12月28日 · Carbon dots (CDs) are carbon-based optical nanomaterials and have garnered significant attention in recent time because of their unique properties and diverse applications in fields such as ...
Carbon dots structural characterization by solution-state NMR …
Calculations allow us to predict the UV–visible absorption and IR spectra behavior of the species detected by the NMR technique, and propose a structure that can explain the experimentally observed features and infer the presence or absence of a carbon core in the proposed structures.
Nuclear magnetic resonance (NMR) is ideally suited to comprehensively characterize the chemical composition of carbon dots, based on predictable chemical shifts of resonances due to the chemical-bonding environment. Beyond just taking “the” …