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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 ... -
Spectrophotometric determination of the acidity dissociation constants of symmetric Schiff base derivatives
Türkoğlu, Gülsen; Berber, Halil; Yaman, Özkütük, M. (Gazi University Eti Mahallesi, 2014)In this study, the acidity constants of series symmetric Schiff base derivatives have been determined using the UV-visible spectrophotometric method at a temperature of 25(±0.1) °C. The deprotonated acidity constants (pKa) ... -
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 imidazole derivatives
Öğretir, Cemil; Berber, Halil; Asutay, O (American Chemical Society, 2001)The acid dissociation constants, pK(a), of eight biologically active imidazole derivatives were determined using a spectroscopic technique. Using the obtained acid dissociation constants, attempts were made to elucidate ... -
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 ... -
Spectroscopic determination of acid dissociation constants of some pyridyl Shiff bases
Öğretir, Cemil; Dal, Hakan; Berber, Halil; Taktak, Fadime Fulya (American Chemical Society, 2006)The acid dissociation constants (pK(a)) of eight biologically active pyridyl Shiff bases were determined using a UV-vis spectroscopic technique at 25 +/- 0.1 degrees C. The first acidity constants (pK(a1)) of the ... -
Spectroscopic determination of acidity constants of some monoazo resorcinol derivatives
Berber, Halil; Öğretir, Cemil; Lekesiz, Emine Çiğdem Sev; Ermiş, Emel (American Chemical Society, 2008)The acidity constants, as pK(a) values, of six monoazo resorcinol derivatives were determined by the UV-visible spectroscopic technique at 25 degrees C (+/- 0.1 degrees C). The protonation and deprotonation behaviors of ... -
Spectroscopic Determination of the Acid Dissociation Constants of Some 2-Hydroxy Schiff Base Derivatives
Taktak, Fadime Fulya; Berber, Halil; Dal, Hakan; Öğretir, Cemil (American Chemical Society, 2011)In this study the acidity constants of a series of biologically active pyridyl Schiff bases were calculated from UV-visible spectrophotometric data at (25 +/- 0.1)degrees C. The first acidity constants (pK(a1)) of the ... -
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, ... -
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 ... -
Synthesis and theoretical study of bis(fluoroisatinato)mercury(II)
Kandemirli, Fatma; Koksoy, Baybars; Arslan, Taner; Sagdinc, Seda; Berber, Halil (Elsevier Science BV, 2009)Bis(fluoroisatinato)mercury(II) was synthesised from the reaction between 5-fluoroisatin (HFI) and mercury(II) acetate in methanol. Mercury(II) coordination with nitrogen atom of 5-fluoroisatin molecule was observed using ... -
Synthesis characterization and biological activity of mixed ligand silver(I) complex of 2-benzimidazolylurea and triphenylphosphine
Poyraz, Mehmet; Berber, Halil; Banti, Christina N.; Kourkoumelis, Nikolaos; Manos, Manolis J.; Hadjikakou, Sotiris K. (Pergamon-Elsevier Science LTD, 2017)The treatment with triphenylphosphine (TPP) in DMF solution of the white precipitation derived from the reaction of silver(I) nitrate with 2-benzimidazolylurea (BZIMU) results in the [Ag(TPP)(2)(BZIMU)NO3] (1) complex. The ... -
Synthesis of some alkylaminothiophene derivatives from 3,4-dibromothiophene and their theoretical calculations
Ermiş, Emel; Berber, Halil; Güllü, Mustafa (Elsevier Ltd, 2019)In this study, the copper catalyzed amination reactions of 3,4-dibromothiophene with some primary, cyclic and acyclic secondary amines were investigated to prepare novel electron rich-thiophenes which are expected to be ... -
Synthesis, Characterization and Spectroscopic Studies on Tautomerism and Acidity Constants of Certain 4- (Phenyldiazenyl) Benzene-1,3-Diol Derivatives
Aksu, Ateş Nilüfer; Berber, Halil; Yaman, Müjgan (2016)Bu çalışmada, benzen-1,3-triol ve bazı sübstitüe amino benzen ile monoazo boyar maddeleri sentezlendi. Kimyasal yapıları spektroskopik teknikler ile aydınlatıldı. 4-(fenildiazenil)benzen-1,3-diol türevi bileşiklerinin ... -
Synthesis, Characterization, Crystal Structure and Theoretical Studies of N-(2,4-Dichlorobenzylidene)-3-Methylbenzenamine
N-(2,4-dichlorobenzylidene)-3-methylbenzenamine (L6) was synthesized as single crystal and characterized by FT-IR, Raman, 1H NMR, 13C NMR and UV-VIS spectroscopy. The thermal stability of the title compound was also studied ... -
Synthesis, characterization, tautomerism and theoretical study of some new Schiff base derivatives
Türkoğlu, Gülsen; Berber, Halil; Dal, Hakan; Öğretir, Cemil (Pergamon-Elsevier Science LTD, 2011)New Schiff base derivatives were prepared by the condensation of 5-chloro and 5-bromo salicylaldehyde with bis(o-aminophenol)ethers. Five bis(o-nitrophenol)ether compounds were synthesized using some ditosylate, ...