Sıdır, İsaSıdır, Yadigar GülsevenBerber, HalilDemiray, Ferhat2021-06-232021-06-2320190022-28601872-8014https://doi.org/10.1016/j.molstruc.2018.08.067https://hdl.handle.net/20.500.12491/10233In this study, electronic, optical and spectroscopic FT-IR, UV properties of new synthesized Schiff base hydrazone derivatives, 1-(4-nitrophenyl)-2-(4-phenoxybenzylidene)hydrazone and 1-(2,4-dinitropheny1)-2-(4-phenoxybenzylidene)hydrazone are investigated by performing solution techniques and theoretical calculations. Solvatochromism and solute-solvent interactions were discussed based on the spectral results. It is observed that Schiff base hydrazone derivatives exhibit positive solvatochromism. Energy band gap E-g is determined experimentally and theoretically in solution. Concentration effect on E-g was investigated in DCM solvent for different molarities of solute. It is observed that solvent and concentration can be used for tuning E-g. NO2 substituent group gives rise to E-g value lows 0.3 eV. The refractive index (n) values were obtained from Moss, Ravindra, Herve-Vandamme, Kumar-Singh and Reddy relations based on E-g data. It is observed that n can be controlled with solvents and concentration of solutions. External electric field (EF) is theoretically applied in order to tuning HOMO-LUMO gap and dipole moment. Consequently, Schiff base hydrazone derivatives intend to be insulator under applied EF. (C) 2018 Elsevier B.V. All rights reserved.eninfo:eu-repo/semantics/closedAccessHydrazoneSchiff BaseOptical PropertiesEnergy Band GapRefractive IndexDensity Functional TheoryElectric FieldArticle10.1016/j.molstruc.2018.08.067117631462-s2.0-85053063120Q2WOS:000449310600004Q3