10.48788/DVUA/FWVPREBoiko BohdanBoikoBohdan0009-0007-9359-1004Sumy State UniversityYermakov Maksym0000-0003-1170-6415Sumy State UniversityPshenychnyi Roman0000-0002-2560-9379Sumy State UniversityOpanasyuk Anatolii0000-0002-1888-3935Sumy State UniversityDataverseUA2026PhysicsTransmittance spectraOpanasyuk AnatoliiSumy State University2026-09-142026-09-15Experimental numeric data179531722517379173481701916894171688519text/tab-separated-valuestext/tab-separated-valuestext/tab-separated-valuestext/tab-separated-valuestext/tab-separated-valuestext/tab-separated-valuestext/tab-separated-valuestext/plain1.0CC0 1.0Transmittance spectra data of Zn₁₋ₓMgₓO nanoparticle dispersions in isopropyl alcohol at x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, and 0.6 in the wavelength range of 200–1200 nm.Zn₁₋ₓMgₓO nanoparticles were prepared by the polyol method under an inert argon atmosphere. Ethylene glycol (EG) was used as the reaction medium. Zn(CH₃COO)₂·2H₂O and Mg(CH₃COO)₂·4H₂O salts, with a total amount of 0.01 mol and specified molar ratios, were placed in a three-necked flask, followed by the addition of EG. The mixture was heated to 180 °C under vigorous stirring and maintained at this temperature for 60 min. After cooling, the nanoparticles were separated by centrifugation, washed with isopropyl alcohol using ultrasonic treatment, and centrifuged again. As a result, Zn₁₋ₓMgₓO nanoparticle dispersions in isopropyl alcohol were obtained for x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, and 0.6. For optical measurements, 4 mL of each dispersion was placed in a quartz cuvette with dimensions of 10 × 10 × 50 mm. The transmittance spectra of the dispersions were recorded using a SPECORD 210 Plus spectrophotometer over the wavelength range of 200–1200 nm. The measurement results were saved in .xlsx format using the corresponding software.Ministry of Education and Science of Ukraine0126U001202