Journal of Siberian Federal University. Mathematics & Physics / Analysis of the Effect of pH on the Stability and Optical Spectra of Au Nanoparticles Linked by Conductive BPE Molecule

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Issue
Journal of Siberian Federal University. Mathematics & Physics. 2024 17 (6)
Authors
Lukyanenko, Anna V.; Tsarenko, Andrey V.; Aleksandrovsky, Aleksandr S.; Fedorov, Alexander S.; Umarova, Amina Sh.
Contact information
Lukyanenko, Anna V.: Kirensky Institute of Physics Federal Research Center KSC SB RAS Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation; OCRID: 0000-0001-7496-242X; Tsarenko, Andrey V.: Kirensky Institute of Physics Federal Research Center KSC SB RAS Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation; ; Aleksandrovsky, Aleksandr S.: Kirensky Institute of Physics Federal Research Center KSC SB RAS Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation; OCRID: 0000-0003-1821-6718; Fedorov, Alexander S.: Kirensky Institute of Physics Federal Research Center KSC SB RAS Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation; OCRID: 0000-0002-7911-3301; Umarova, Amina Sh.: Reshetnev Siberian State University of Science and Technology Krasnoyarsk, Russian Federation;
Keywords
Au nanoparticles; citrate method; UV-Vis spectra; 1,2-bis(2-pyridyl)ethylene
Abstract

The preparation of detergent-free gold NPs by the citrate method is shown. The procedure of functionalization of monomeric Au NPs with 1,2-bis(2-pyridyl)ethylene (termed BPE) molecule to obtain Au-BPE dimers is described. According to the results of TEM analysis, the shape of the obtained NPs is close to spherical with a diameter of 21.94 0.28 nm. In dimers, the distance between NPs is controlled by the linker and is 0.75 0.12 nm, which is in agreement with the dimensions of the BPE molecule. According to the results of Experimental absorption UV-Vis spectra, measured over time, in 0.15 M nitric acid solution, Au-BPE dimers are more stable than in an alkali solution of the same molarity. Long-term exposure leads to a decrease in the intensity of the LSP peak of the dimers

Pages
754–760
EDN
NSEMSY
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/154111