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Effect of nanodiamonds on fluorescence enhancement of tryptophan phototransformation reaction products in the presence of halocarbons
Russian version
DOI: 10.21883/EOS.2022.11.55095.3659-22
Kalvinkovskaya Ju. A. 1, Pavich T. A. 1, Ramanenka A. A. 1, Bushuk S. B. 2, Sobchuk A. N. 1, Lapina V. A. 1
1B.I.Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, Belarus
2State Scientific - Production Association of Optics, Optoelectronics and Laser Technology, Minsk, Belarus
Email: juliet@ifanbel.bas-net.by, pavich@imaph.bas-net.by, a.ramanenka@ifanbel.bas-net.by, bushuk@oelt.basnet.by, sobchuk@ifanbel.bas-net.by, vlapina@ifanbel.bas-net.by
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The role of nanodiamonds in the reaction of photochemical transformation of tryptophan in the presence of halogen hydrocarbons has been studied. The photochemical transformation of free tryptophan in a suspension with diamond nanoparticles and in a hybrid complex with them when exposed to UV radiation in the presence of chloroform is investigated. Data from stationary and time-resolved spectroscopic studies show the presence of non-radiative transfer of electron excitation energy between tryptophan molecules and its photodestruction products for the case of a covalent complex with a nanodiamond. It is shown that in the presence of energy transfer, an increase in the intensity of integral fluorescence occurs in the range of ~ 450 nm. Thus, a covalent tryptophan complex with a nanodiamond can serve as a fluorescent marker for the presence of chloroform in solution. Keywords: nanoscale diamonds, hybrid complexes, tryptophan phototransformation, spectral-luminescent properties, fluorescence decay kinetics, chloroform.
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