- Bitlis Eren University Journal of Science and Technology
- Vol: 1 Issue: 1
- An experimental study on relationship between hammett substituent constant and electronic absorption...
An experimental study on relationship between hammett substituent constant and electronic absorption wavelength of some azo dyes
Authors : Yadigar Gülseven Sidir, Yadigar Gülseven Sidir, Isa Sidir, Isa Sidir, Halil Berber, Halil Berber, Erol Taşal, Erol Tasal
Pages : 7-11
Doi:10.17678/beuscitech.47153
View : 9 | Download : 3
Publication Date : 2011-12-23
Article Type : Other
Abstract :In this study, absorption spectra of sixteen azo dyes have been recorded in various solvents. These azo dyes have substituents such as OH, SO3H, Cl, I, NO2, C2H5 and OCH3 in different positions of phenyl ring. There is a shift in ?max whose amount is dependent upon the type and position of substituent on the ring. The effects of substituent on the absorption spectra of azo dyes are interpreted by correlation of absorption maximum wavelengths (nm) with the hammett substituent parameters. Charge transfer transitions are observed in inverse direction for azo dyes with electron acceptor substituent compared to azo dyes with electron donorKeywords : Absorption spectra, azo dye, electronic charge transfer hammett substituent constant, non-linear optic