Yazar "Sidir, İsa" için listeleme
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Acidity constant determination of novel drug precursor benzothiazolon derivatives including acyl and piperazine moieties
Sidir, İsa; Sidir, Yadigar Gülseven; Berber, Halil (Pergamon-Elsevier Science LTD, 2013)In this study, protonation and deprotonation behaviors of eight new drug precursor benzothiazolon derivatives in all of acidic and basic scale (super acidic, pH, super basic regions) are analyzed by using UV-visible ... -
Electronic structure and optical properties of Schiff base hydrazone derivatives by solution technique for optoelectronic devices: Synthesis, experiment and quantum chemical investigation
Sidir, İsa; Sidir, Yadigar Gülseven; Berber, Halil; Demiray, Ferhat (Elsevier Science BV, 2019)In 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-phenoxybe ... -
The electronic structure, solvatochromism, and electric dipole moments of new Schiff base derivatives using absorbance and fluorescence spectra
Sidir, Yadigar Gülseven; Aslan, Cebrail; Berber, Halil; Sidir, İsa (Springer/Plenum Publishers, 2019)The electronic structure and electronic transitions of four new mono Schiff base derivatives are interpreted by using absorption and fluorescence spectra including 28 different solution medium. Electrical dipole moments ... -
Emerging ground and excited state dipole moments and external electric field effect on electronic structure. A solvatochromism and theoretical study on 2-((phenylimino)methyl)phenol derivatives
Sidir, İsa; Sidir, Yadigar Gülseven; Berber, Halil; Demiray, Ferhat (Elsevier Science BV, 2015)The absorption and fluorescence spectra of three 2-((phenylimino)methyl)phenol derivatives have been evaluated in a series of organic solvents. The ground state (mu(g)) and excited state (mu(e)) dipole moments are determined ... -
Estimation of ground and excited states dipole moments of alpha-hydroxy phenyl hydrazone derivatives: Experimental and quantum chemical methods
Sidir, İsa; Sidir, Yadigar Gülseven; Demiray, Ferhat; Berber, Halil (Elsevier Science BV, 2014)The ground state (mu(g)) and excited state (mu(e)) dipole moments of the studied alpha-hydroxy phenylhydrazones are determined by using solvatochromism theory which is based on the variation of Stokes shift with solvent's ... -
Solvatochromic behavior and electronic structure of some symmetric 2-aminophenol Schiff base derivatives
Sidir, Yadigar Gülseven; Sidir, İsa; Berber, Halil; Türkoğlu, Gülsen (Elsevier Science BV, 2014)The solvatochromic behavior and electronic structure of four symmetric 2-aininophenol Schiff base derivatives were investigated by using electronic absorption spectra in fourteen different spectroscopic grade solvents. The ... -
Solvatochromic effect studies on the absorption spectra of 4-((2-ethylphenyl)diazenyl)benzene-1,3-diol and 2-((2-ethylphenyl)diazenyl)benzene-1,3,5-triol molecules
Gülseven, Yadigar; Tasal, Erol; Sidir, İsa; Güngör, Tayyar; Berber, Halil; Öğretir, Cemil (Pergamon-Elsevier Science LTD, 2009)The electronic absorption spectra of 4-((2-ethylphenyl)diazenyl)benzene-1,3-diol and 2((2-ethylphenyl)diazenyl)benzene-1,3,5-triol molecules in the nine different solvent variable electronic characters have been recorded. ... -
Solvatochromism and electronic structure of some symmetric Schiff base derivatives
Sidir, Yadigar Gülseven; Sidir, İsa; Berber, Halil; Türkoğlu, Gülsen (Elsevier Science BV, 2015)In this present work, we have investigated electronic absorption spectra of three symmetric Schiff bases in fourteen spectroscopic grade solvents which have different polarities. The electronic transitions have been evaluated ... -
Specific and non-specific interaction effect on the solvatochromism of some symmetric (2-hydroxybenzilydeamino)phenoxy Schiff base derivatives
Sidir, İsa; Sidir, Yadigar Gülseven; Berber, Halil; Türkoğlu, Gülsen (Elsevier Science BV, 2016)In this present work, solvatochromic behavior, specific and non-specific solute-solvent interactions and electronic structure of (2-hydroxybenzilydeamino)phenoxy Schiff base derivatives have been investigated by using ... -
Spectroscopic Determination of Acid Dissociation Constants of N-Substituted-6-acylbenzothiazolone Derivatives
Sidir, Yadigar Gülseven; Sidir, İsa; Berber, Halil (American Chemical Society, 2011)The acid dissociation constants of twelve novel drug precursor N-substituted-6-acylbenzothiazolone derivatives were determined by using the UV-vis spectroscopic technique. The protonation and deprotonation behaviors of the ... -
Spectroscopic Determination of Acid Dissociation Constants of Some Novel Drug Precursor 6-Acylbenzothiazolon Derivatives
Sidir, Yadigar Gülseven; Sidir, İsa; Berber, Halil; Tasal, Erol; Öğretir, Cemil (American Chemical Society, 2010)The acid dissociation constants, as pK(a) values, of eight drug precursor 6-acylbenzothiazolon derivatives were determined using UV-vis spectroscopic technique. The protonation and deprotonation behaviors of the investigated ... -
Studies on solvatochromic behavior of some monoazo derivatives using electronic absorption spectra
Sidir, İsa; Tasal, Erol; Gülseven, Yadigar; Güngör, Tayyar; Berber, Halil; Öğretir, Cemil (Pergamon-Elsevier Science LTD, 2009)The electronic absorption spectra of 2',4'-dihydroxy-2-methoxyazobenzene and 4,2',4'-trihydroxyazobenzene molecules have been investigated in solvents with different polarities. The solvent dependent UV-vis spectral shifts, ... -
Studies on the electronic absorption spectra of some monoazo derivatives
Sidir, Yadigar Gülseven; Sidir, İsa; Tasal, Erol; Ermiş, Emel (Pergamon-Elsevier Science LTD, 2011)The electronic absorption spectra of a series of azo dye compounds containing -Cl, -SO(3)H and -OH groups were recorded in twenty one solvents with different polarities. The solvents were selected to cover a wide range of ... -
A study on solvatochromism of some monoazo dye derivatives
Sidir, İsa; Sidir, Yadigar Gülseven; Berber, Halil; Tasal, Erol (Elsevier Science BV, 2013)The UV-vis and fluorescence spectra of four monoazo dye derivatives were investigated in the solvents with different polarities. Characterization of UV-vis electronic bands is specified by calculating charge transfer energy ... -
Study on the electronic and photophysical properties of the substitute-((2-phenoxybenzylidene)amino)phenol derivatives: Synthesis, solvatochromism, electric dipole moments and DFT calculations
Sidir, Yadigar Gülseven; Pirbudak, Gülsen; Berber, Halil; Sidir, İsa (Elsevier Science BV, 2017)In this study, new substitute-((2-phenoxybenzylidene)amino)phenol derivatives were synthesized and characterized by elemental analysis, H-1 NMR,C-13 NMR and FT-IR spectra. The absorption and fluorescence spectra of the ... -
UV-spectral changes for some azo compounds in the presence of different solvents
Sidir, Yadigar Gülseven; Sidir, İsa; Berber, Halil; Tasal, Erol (Elsevier Science BV, 2011)The electronic absorption spectra of four azo dyes with different substituents (such as Cl, I, OH) are determined at room temperature in twenty-one solvents with different polarities. The electronic transitions of azo dyes ...
