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Issue 1, 2018
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Small molecular organic nanocrystals resemble carbon nanodots in terms of their properties

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Abstract

The most commonly observed phenomena in carbon nanodots (CNDs) are the strong excitation wavelength dependent multicolor fluorescence emission and the particle size distribution between 3–5 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 ∼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.

Graphical abstract: Small molecular organic nanocrystals resemble carbon nanodots in terms of their properties

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Supplementary files

Article information


Submitted
06 Jun 2017
Accepted
16 Oct 2017
First published
16 Oct 2017

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2018,9, 175-180
Article type
Edge Article

Small molecular organic nanocrystals resemble carbon nanodots in terms of their properties

S. Khan, A. Sharma, S. Ghoshal, S. Jain, M. K. Hazra and C. K. Nandi, Chem. Sci., 2018, 9, 175
DOI: 10.1039/C7SC02528A

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