Experimental and computational studies on the absorption properties of novel formazan derivatives

Authors : Gülşen TÜRKOĞLU, M Emin ÇINAR

Pages : 710-727

View : 15 | Download : 5

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Eight novel 3-insert ignore into journalissuearticles values(4-insert ignore into journalissuearticles values(benzyloxy);phenyl);-5-insert ignore into journalissuearticles values(4-bromophenyl);-1-insert ignore into journalissuearticles values(4-substituted-phenyl);formazan insert ignore into journalissuearticles values(4a-4h); were synthesized by coupling of substituted phenylhydrazones with diazonium salts of 4-bromoaniline. The substituted phenylhydrazones, which are intermediate products, were obtained from the condensation of substituted phenylhydrazines with 4-insert ignore into journalissuearticles values(benzyloxy);benzaldehyde. All target compounds were characterized by using FTIR, $^{1}$H NMR, $^{13}$C NMR, LC$-$MS spectrometry, and elemental analysis. Absorption spectra of these compounds in solvents with different polarities were investigated thoroughly. Time-dependent density functional theory insert ignore into journalissuearticles values(TD-DFT); studies were conducted to shed light on their electronic structures, Kohn--Sham orbitals, and electronic transitions.
Keywords : Formazans, UV visible absorption spectroscopy, substituent effect, solvent effect, density functional theory DFT,