Show the presence of sharp high-intensity bands characteristic on the low molecular weight modifiers–1,4-hydroquinone and 2-methyl-1,4-hydroquinone.The shapes of your 13C-NMR spectra were standard for coal HA [21,368]. They may be The shapes with the 13 C-NMR spectra were typical for coal HA [21,368]. They’re characterized by high spectral intensity in the selection of alkyl chains (05 ppm), aromaticAgronomy 2021, 11,This really is indicative on the presence of this structural group inside the resulting derivative. For the spectra of hydroquinone derivative–CHP-HQ and FA-HQ there are actually alter within the ratio on the intensities of the regions at 10820 and 12035, which can clarify the occurrence of a fragment of hydroquinone in the modification, which features a signal at 115 ppm. Typical FTIR spectra are shown in Figure 3. The spectra of each CHP and FA deriva-16 eight of tives didn’t show the presence of sharp high-intensity bands characteristic from the low molecular weight modifiers–1,4-hydroquinone and 2-methyl-1,4-hydroquinone.Figure 3. 3. FTIR spectra the the parent humic acids (CHP), fulvic acids (FA), derivatives with diFigure FTIR spectra of of parent humic acids (CHP), fulvic acids (FA), and and derivatives with hydroxybenzenes (1,4-hydroquinone and and 2-methyl-1,4-hydroquinone). dihydroxybenzenes (1,4-hydroquinone 2-methyl-1,4-hydroquinone).The FTIR spectra CHP and its derivatives show two broad absorption peaks at the FTIR spectra ofof CHP and its derivatives show two broad absorption peaks at 1500550 cm-1 and 1350400 cm-1 characteristic from the carboxylate anion. An intense 1500550 cm-1 and 1350400 cm-1 characteristic of your carboxylate anion. An intense and and peak inside the inside the of 1000 cm-1 could be is usually attributed to silicate impurities with the broad broad peak region region of 1000 cm-1attributed to silicate impurities of the parent parent potassium The spectra ofspectra of FA are characterized with intense absorption potassium humate. humate. The FA are characterized with intense absorption peaks at -1 peaks at cm-1 which can which is usually attributed to of signals of stretching in the C-H 2960, 2880 2960,, 2880 cm ,be attributed to the signals thestretching vibrations vibrations on the C-H methyl group in the The data of data spectroscopy are indicative in the formethyl group in the Olutasidenib Technical Information modifier.modifier. The FTIR of FTIR spectroscopy are indicative of the formation of modified derivatives of CHP and FA, whilst they be regarded as a mere mation of modified derivatives of CHP and FA, whilst they cannotcannot be regarded as as a mere superposition of your compounds. superposition on the startingstarting compounds. Optical properties the HS derivatives synthesized in this perform have been characterized Optical properties ofof the HS derivatives synthesized in this operate were characterized applying UV-vis and Almonertinib MedChemExpress fluorescence spectroscopy. The spectra of HA and FA derivatives with applying UV-vis and fluorescence spectroscopy. The spectra of HA and FA derivatives with naphthoquinones contain characteristic absorption bands of individual quinones and naphthoquinones contain characteristic absorption bands of individual quinones and hyhydroquinones. The spectra CHP CHP derivatives of 2-hydroxy-1,4-naphthoquinone droquinones. The spectra of theof the derivatives of 2-hydroxy-1,4-naphthoquinone concontain a peak at 260 nm. At the characteristic bands for bands for derivatives with tain a peak at 260 nm. At the very same,the same, the characteristicderivatives with hydroquihydroquinones wer.