Kimya Bölümü: Recent submissions
Now showing items 121-140 of 171
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Synthesis and competitive 7 Li NMR studies of two morpholine-based ligands
(Elsevier, 2021)7 Li NMR spectroscopy was used to investigation the stability, stoichiometry and thermodynamic infor- mation of a Li + complex with one known, N1-(2-morpholinoethyl)-N1-((pyridine-2-yl)methyl)propane- 1,3-diamine (A 1 ) ... -
Investigations of structural, spectral (IR, 1H‑, 9F‑, 11B‑, 13C‑, 15 N‑, 17O‑NMR) and anticancer properties of 5FU@B12N12 complexes
(2021)B12N12 nanocage was selected as a drug carrier for 5-fluorouracil (5FU). Both compounds were optimized B3LYP/6– 31 + G(d) level in the water. Electrophilic/nucleophilic attack regions and the appropriate interaction sites ... -
Could Peganum harmala be effective in the treatment of COVID-19?
(2021)BACKGROUND: Predominant molecules in Peganum harmala leaves were detected using gas chromatography-mass spectrometry (GC-MS). Based on the results of this analysis, most alkaloids, fl avonoids and triterpenoids in found ... -
Scale factor database for the vibration frequencies calculated in M06-2X, one of the DFT methods
(2021)Vibrational scale factors were determined for the M06-2X method. The calculated scale factors were supported statistically. The main objective is to determine the concordance between frequencies. Descriptive statistics ... -
The highly protective natural medical agents against COVID-19
(2021)OBJECTIVE: The studies to prevent the Corona virus, which is a huge epidemic nowadays and causes the death of many people, are of great importance. Drugs to be developed to prevent the proliferation and spread of it. The ... -
New anti-viral drugs for the treatment of COVID-19 instead of favipiravir
(2021)The SARS-CoV-2 virus is a major problem in the world right now. Currently, all the attention of research centers and governments globally are focused on the investigation of vaccination studies and the discovery of small ... -
Investigations substituent effect on structural, spectral and optical properties of phenylboronic acids
(2021)Ortho- and para-substituent arylboronic acid are investigated. Geometric structure and structural proper- ties of these compounds are done. IR and NMR spectrum are calculated for the spectral characterizations. Contour ... -
Experimental and Computational Investigation for (E)-2-hydroxy-5-(2- benzylidene) Aminobenzoic Acid Schiff Base as a Corrosion Inhibitor for Copper in Acidic Media
(2021)The corrosion behavior of copper in 1 M HCl in the absence and presence of Hha ((E)-2-hydroxy-5-(2-benzylidene) aminobenzoic acid) has been investigated experimentally and computationally. In this way, the electrochemical ... -
Experimental and theoretical investigation of inhibition behavior of 2-((4-(dimethylamino)benzylidene)amino)benzenethiol for carbon steel in HCl solution
(2021)2-((4-(dimethylamino) benzylidene)amino)benzenethiol (DBB) compound has been synthesized and tested for prevention of carbon steel corrosion in HCl at different temperatures. The research was carried out using ... -
Computational structure characterization, nonlinear optical properties and antitumor activities of Nickel(II) complexes containing alkoxy-derived dicyandiamide ligands
(NISCAIR, 2021)[Ni(dcda-O-Me)2] 2+ (1), [Ni(dcda-O-Et)2] 2+ (2), [Ni(dcda-O-nPr)2] 2+ (3), and [Ni(dcda-O-nBu)2] 2+ (4) complexes (dcda-O-R is dicyandiamide ligands with alkoxy-derived) have been optimized in the gas phase at ... -
Self-adjoint extensions for a class of singular operators
(Turkish Journal of Mathematics, 2021)In this study, we consider the domains of the minimal and maximal operators generated of singular differential-expression-type Sturm–Liouville and obtain all self-adjoint extensions of the operator in terms of ... -
Half-inverse problems for the quadratic pencil of the Sturm–Liouville equations with impulse
(2021)In this paper, we consider the inverse spectral problem for the impulsive Sturm–Liouville differential pencils on [0, π] with the Robin boundary conditions and the jump conditions at the point 𝜋������ 2 . We prove ... -
Eco-friendly trace analysis of silver in beer/wine samples using a new co-polymeric nanocomposite based-ultrasound assisted-cloud point extraction combined with spectrophotometry
(ELSEVIER, 5 şubat 20)In this study, a new magnetic nanocomposite based on the tris(2-hydroxymethyl)aminomethane-modified poly (styrene-co-N-maleimide) copolymer and Fe3O4 nanoparticles were prepared as a new micellar interface for preconcentration ... -
Application of a novel poly(SMAm)-Tris-Fe3O4 nanocomposite for selective extraction and enrichment of Cu(I) /Cu(II) from beer, soft drinks and wine samples, and speciation analysis by micro-volume UV–Vis spectrophotometry
(ELSEVIER, 2021)In this study, a novel functional nanocomposite was synthesized, characterized and selectively used in pHcontrolled separation, pre-concentration and speciation analysis of Cu(I) and Cu(II) from sample matrices where ... -
Use of new polymeric composites for preconcentration of trace Ag+ ions from the selected mushroom/vegetables by ultrasoundassisted cloud-point extraction coupled to microvolume UV-Vis spectrophotometry
(Taylor&Francis, 2021)The magnetic nano-composites based on the tris(hydroxymethlmethyl) aminomethane-modified maleic anhydride-co-styrene copolymers and Fe3O4 nano-particles were prepared as new potential chelating agents for ultrasound-a ... -
Investigations substituent effect on structural, spectral and optical properties of phenylboronic acids
(ELSEVIER, 2021)Ortho- and para-substituent arylboronic acid are investigated. Geometric structure and structural proper ties of these compounds are done. IR and NMR spectrum are calculated for the spectral characterizations. Contour ... -
Selective extraction and enrichment of 5-hydroymethylfurfural from honey, molasses, jam and vinegar samples prior to sensitive determination by micro-volume UV-vis spectrophotometry
(CADEMIC PRESS INC ELSEVIER SCIENCE525 B ST, STE 1900, SAN DIEGO, CA 92101-4495, 2021)In this study, a new method was developed for the extraction/enrichment of 5-hydroxymethylfurfural (5-HMF) from sample matrix prior to analysis. The method is based on the selective formation of the imine adduct and ionpair ... -
Computational investigation of molecular structures, spectroscopic properties and antitumor-antibacterial activities of some Schiff bases
(ELSEVIER, 2021)Molecular structures, spectroscopic properties (IR, 1 H NMR and 13C NMR, UV-VIS), molecular electrostatic poten tial maps and some molecular properties (ionization energy, electron affinity, energy gap, hardness, electroneg ... -
A New Enrichment Method for Quantification of 5-Hydroxymethylfurfural by Indirect Flame Atomic Absorption Spectrometry in Honey and Jam Samples
(OXFORD UNIV PRESS INCJOURNALS DEPT, 2001 EVANS RD, CARY, NC 27513, 2021)Background: Because of increasing amounts of 5-hydroxymethylfurfural (5-HMF) in processed foods and the complexity of the matrix, monitoring of trace 5-HMF requires accurate and reliable methods. Hence, an efficient sample ... -
Eco-friendly trace analysis of silver in beer/wine samples using a new co-polymeric nanocomposite based-ultrasound assisted-cloud point extraction combined with spectrophotometry
(ACADEMIC PRESS INC ELSEVIER SCIENCE525 B ST, STE 1900, SAN DIEGO, CA 92101-4495, 2021)In this study, a new magnetic nanocomposite based on the tris(2-hydroxymethyl)aminomethane-modified poly (styrene-co-N-maleimide) copolymer and Fe3O4 nanoparticles were prepared as a new micellar interface for preconcentration ...