Kurum Yazarı "Berber, Halil" WoS İndeksli Yayınlar Koleksiyonu İçin Listeleme
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An ab initio study on protonation of some substituted thiazole derivatives
Yarlıgan, S; Öğretir, C; Csizmadia, IG; Acikkalp, E; Berber, Halil; Arslan, T (Elsevier Science BV, 2005)The preferred tautomeric forms of some 2-oxothiazole derivatives were predicted using acidity constants calculated by experimental and ab initio methods. Thiazole derivatives were subject to geometry optimization at two ... -
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 ... -
Electrochemical Determination of Paracetamol by a Novel Derivative of Formazan Modified Pencil Graphite Electrode
Görçay, Hakan; Türkoğlu, Gülsen; Şahin, Yücel; Berber, Halil (IEEE-Inst Electrical Electronics Engineers Inc, 2014)A modified electrode, based on electrodeposition of 5,5'-(oxybis(4,1-phenylene))bis(3-(2-hydroxyphenyl)-1-phenylformazan (BF) onto pencil graphite (PG) electrode, was investigated for the determination of paracetamol in ... -
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 ... -
A new 2,2 '-oxydianiline derivative symmetrical azomethine compound containing thiophene units: Synthesis, spectroscopic characterization (UV-Vis, FTIR, H-1 and C-13 NMR) and DFT calculations
Ermiş, Emel; Durmus, Kaan; Aygüzer, Ömer Uğur; Berber, Halil; Güllü, Mustafa (Elsevier Science BV, 2018)In this study, a new symmetrical azomethine compound, N,N'-oxydiphenylenebis(5-(thiophen-2-yl) salicylidenimine OPBTS (5), having two thiophene rings and N, O donor groups, was successfully prepared by a simple condensation ... -
Novel formazan derivatives containing phenylsulfanyl and carbonyl units: synthesis, optical and electrochemical properties
Türkoğlu, Gülsen; Berber, Halil (Royal Soc Chemistry, 2016)A series of phenylsulfanyl and aryl carbonyl containing formazan derivatives 4a-4h and 5a-5h were synthesized by coupling of substituted phenylhydrazones with diazonium salts of 2-(phenylthio) benzenamine and 5-chloro-2- ... -
Quantum chemical and experimental studies on the mechanism of alkylation of beta-dicarbonyl compounds. The synthesis of five and six membered heterocyclic spiro derivatives
Sadıkov, N; Nasibov, A; Öğretir, Cemil; Berber, Halil; Hüseyinli, A (MDPI, 2004)The alkylation of beta-dicarbonyl compounds in a K2CO3/DMSO system was found to afford O- and C-alkylated derivatives, depending on the type of the P-dicarbonyl compound involved. The alkyl derivatives obtained were used ... -
Quantum chemical studies on some 1,2,4-triarylsubstituted imidazoles
Öğretir, Cemil; Berber, Halil (Elsevier Science BV, 2002)The geometries, proton affinities and thermodynamic properties of some 1,2,4-triarylsubstituted imidazole derivatives were calculated with full geometry optimization using AM1 and PM3 methods in aqueous phase. A possible ... -
A quantum chemical study on structure of 1,2-bis(diphenylphosphinoyl)ethane and hydroquinone cocrystal
Yenikaya, Cengiz; Öğretir, C; Berber, Halil (Elsevier Science BV, 2005)The cocrystal of 1,2-Bis(diphenylphosphinoyl)ethane (DPPEO) with hydroquinone (HQ) (1: 1) were studied theoretically with MINDO/3, MNDO, PM3 and AM I semi-empirical methods to elucidate its structure. The bond lengths and ... -
A quantum chemical study on structure of 1,2-bis(diphenylphosphinoyl)ethane and phenol cocrystal
Yenikaya, Cengiz; Öğretir, C; Berber, Halil (Elsevier Science BV, 2004)The cocrystal of 1,2-bis(diphenylphosphinoyl)ethane (DPPEO) with phenol (1: 1) were studied theoretically with AM1, PM3, MNDO and MINDO/3 semi-empirical methods to elucidate its structure. The bond lengths and angles from ... -
A quantum chemical study on structures of (+)-(R)-2,2-bis(diphenylphosphinoyl)-1,1 '-binaphthyl and its hydroquinone complex
Yenikaya, Cengiz; Öğretir, C; Berber, Halil (Elsevier Science BV, 2005)The (+)-(R)-2,2-bis(diphenylphosphinoyl)-1,1'-binaphthyl ((+)-(R)-BINAPO) and its cocrystal with hydroquinone (HQ) (1:1) were studied theoretically with AM1, PM3, MNDO and MINDO/3 semi-empirical methods to elucidate their ... -
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 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 ...