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Synthesis of fluorescent nanonstructures based on L-aspartic acid with various additives

Vera V. Olomskaya, Saratov State University (Russia); Ekaterina A. Mordovina, Saratov State University (Russia); Irina Yu. Goryacheva, Saratov State University (Russia)


Fluorescent nanostructures have found their application in numerous medical, electrochemical, and biochemical fields of science due to their unique properties. As known, modification of fluorescent nanostructures, carbon-based in particular, by heteroatoms, leads to the regulation of their fluorescent properties depending on the purpose of future use.
Recently, much attention has been paid to fluorescent nanostructures based on biocompatible compounds, one of which may be L-aspartic acid. The purpose of this work is the hydrothermal synthesis of fluorescent nanostructures based on L-aspartic acid, to study the effect of citric acid and 1,2-ethylenediamine additives on the fluorescent properties of nanostructures synthesized in a narrow temperature range (2 and 3 hours). Citric acid and 1,2-ethylenediamine additives are interesting because these compounds include functional groups with heteroatoms.
As a result of work, we found that the highest fluorescence intensity was achieved with the combined hydrothermal treatment of L-aspartic acid and 1,2-ethylenediamine for 3 hours. Structures have an emission maximum at 400 nm and a noticeable linear dependence of the emission maximum on the wavelength of the exciting light. The use of one of the important amino acids of the body (L-aspartic acid) as the main component for the synthesis of fluorescent nanostructures, will allow them to be further used for bioimaging.
The work was supported by Ministry of Science and Higher Education of the Russian Federation (project № FSRR-2020-0002).


Vera V. Olomskaya
Saratov State University


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