期刊
CHEMICAL SCIENCE
卷 9, 期 1, 页码 175-180出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sc02528a
关键词
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资金
- Department of Biotechnology [BT/PR4067/BRB/10/1128/2012]
- Department of Atomic Energy (BARD Project), Government of India [12RDSIN5.040103]
The most commonly observed phenomena in carbon nanodots (CNDs) are the strong excitation wavelength dependent multicolor fluorescence emission and the particle size distribution between 35 nm observed using a transmission electron microscope (TEM). However, it is not evident yet whether the emission originates from the particles observed using a TEM. In this article, we show that hydrothermal treatment of citric acid produces methylenesuccinic acid, which gives rise to hydrogen-bonded nano-assemblies with CND-like properties. While single crystal X-ray crystallography confirms the structure of methylenesuccinic acid, fluorescence correlation spectroscopy (FCS) confirms the presence of a molecular fluorophore with an average hydrodynamic diameter of similar to 0.9 nm. This size is much smaller than the size of the particles observed using a TEM. We conclude that the particles observed using a TEM are the drying mediated nanocrystals of methylenesuccinic acid.
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