Browsing Chemistry & Earth Sciences by Title
Now showing items 433-452 of 542
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Spectrofluorometric investigations on the solvent effects on the photocyclization reaction of diclofenac
( Elsevier , 2023 , Article)The solvent effects on the photochemical conversion rate of the photosensitizing drug diclofenac (DCF) were investigated using steady-state fluorescence spectroscopy. The spectral information obtained for the photochemical ... -
Spectrophotometric and thermal studies on the charge – Transfer complexes of 4-(aminomethyl) piperidine as donor with σ- and π-electron acceptors
( Elsevier , 2014 , Article)The spectroscopic characteristics of the solid charge-transfer molecular complexes (CT) formed in the reaction of the electron donor 4-(aminomethyl) piperidine (4AMP) with the σ-acceptor iodine and the π-acceptors ... -
Spectrophotometric Determination of Hydrogen Peroxide by a Hydroquinone-Aniline System Catalyzed by Molybdate
( Korean Chemical Society , 2004 , Article)In this system hydroquinone is oxidized to pbenzoquinone by H2O2. 2 aniline are added, in successive stages, to pbenzoquinone, to yield the disubstituted quinone as the final product. 20 The UV-VIS spectrum of the product ... -
Spectroscopic investigation of the charge-transfer interactions between 1,4,7-trimethyl-1,4,7-triazacyclononane and the acceptors iodine, TCNE, TCNQ and chloranil
( Elsevier , 2007 , Article)The interaction of the interesting polynitrogen cyclic base 1,4,7-trimethyl-1,4,7-triazacyclononane (TMTACN) with the σ-acceptor iodine and π-acceptors tetracyanoethylene (TCNE), 7,7,8,8-tetracyanoquinodimethane (TCNQ) and ... -
Spectroscopic investigation of the donor-acceptor interaction between o-phenylenediamine and tetracyanoethylene in dichloromethane
( Elsevier B. V. , 2007 , Article)The interaction between the electron donor o-phenylenediamine (o-phendn) and the π-acceptor tetracyanoethylene (TCNE) has been investigated spectrophotometrically in dichloromethane at 25 °C. The results indicate that the ... -
Spectroscopic investigation of the novel charge-transfer complex [(phen)(TCNE)12] formed in the reaction of phenacetin with tetracyanoethylene
( Elsevier , 2005 , Article)The charge-transfer (CT) interaction of the electron donor phenacetin (phen) and the π-electron acceptor tetracyanoethylene (TCNE) has been studied in CH2Cl2. The results obtained indicate the formation of the novel ... -
Spectroscopic studies on the charge-transfer complex [VO(acac) 2]I5 formed in the reaction of oxovanadium(IV) acetylacetonate with iodine
(2005 , Article)Spectroscopic Studies on the Charge-Transfer Complex [VO(acac)2]I5 Formed in the Reaction of Oxovanadium(IV)acetylacetonate with Iodine -
Sputtered manganese oxide thin film on carbon nanotubes sheet as a flexible and binder-free electrode for supercapacitors
( John Wiley and Sons Ltd , 2019 , Article)In this work, flexible carbon nanotubes (CNTs)/manganese oxide (MnO2) composite electrode was fabricated by direct deposition of MnO2 nanoparticles on CNTs sheet by RF magnetron sputtering. The surface morphology and ... -
Stabilized Octahedral Frameworks in Layered Double Hydroxides by Solid-Solution Mixing of Transition Metals
( Wiley-VCH Verlag , 2017 , Article)Pseudocapacitors have received considerable attention, as they possess advantages of both rechargeable batteries and electric double layer capacitors. Among various active materials for pseudocapacitors, α-layered double ... -
Stratigraphy and sedimentology of the Hofuf Formation in the State of Qatar in relation to the tectonic evolution of the East Arabian Block
( Sultan Qaboos University , 2002 , Article)Well-exposed, fine-grained to pebbly coarse-grained fluvial sandstones of Late Miocene to Pleistocene age crop out in the south-central and south-western parts of Qatar. These sandstones belong to the Hofuf Formation and ... -
Stratigraphy, faciès analysis and reservoir characterization of the Upper Jurassic Arab "C", Qatar, Arabian Gulf
( Gebruder Borntraeger Verlagsbuchhandlung , 2011 , Article)The Arab C is a member of the Jurassic Arab Formation, one of the largest carbonate reservoirs in the Arabian Basin. Detailed petrographic analysis of cores and thin sections from selected wells in the onshore Dukhan ... -
Studies on chemistry, spectroscopy and antioxidant activities of chromium(III)-hydrazide complexes
( Bentham Science Publishers B.V. , 2015 , Article)Acid hydrazides are vital chemical entities due to their biological activities. Upon complexation with certain metal ions, their biological activities are known to be positively enhanced. The present work describes the ... -
Sub-Femtojoule Hybrid Plasmonic Optical Modulator
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)A highly compact optical modulator is proposed and analyzed. The modulator is based on the hybrid plasmonic waveguide platform. The structure of the modulator is built from silicon, silver, and electro-optical polymer ... -
Substituted 2-aminobenzothiazoles salicylidenes synthesis and characterization as cyanide sensors in aqueous medium
( MDPI AG , 2018 , Article)(E)-2-((benzo[d]thiazol-2-ylimino)methyl)-4-nitrophenol 1 and (E)-2-(((6-methoxybenzo[d]thiazol-2-yl)imino)methyl)-4-nitrophenol 2 were synthesized efficiently under microwave conditions. The structures were confirmed using ... -
Substituted phenols as corrosion inhibitors for copper in nitric acid
( WILEY-VCH Verlag GmbH , 1988 , Article)The dissolution of copper in nitric acid solution in the presence of resorcinol, o, p-aminophenols, catechol, o-cresol and salicylaldehyde as corrosion inhibitors has been studied by galvanostatic polarization and weight ... -
The supramolecular host-guest complexation of Vemurafenib with β-cyclodextrin and cucurbit[7]uril as drug photoprotecting systems: A DFT/TD-DFT study
( Elsevier , 2020 , Article)The supramolecular host-guest complexation of the first-line anticancer drug Vemurafenib (VFB) with β-cyclodextrin (β-CD) and cucurbit[7]uril (CB7) is computationally investigated employing the DFT/TD-DFT method in implicit ... -
Surfactant induced microwave disintegration for enhanced biohydrogen production from macroalgae biomass: Thermodynamics and energetics
( Elsevier , 2022 , Article)This research work aimed about the enhanced bio-hydrogen production from marine macro algal biomass (Ulva reticulate) through surfactant induced microwave disintegration (SIMD). Microwave disintegration (MD) was performed ... -
Surfactant-aided impregnation of MnF2 into CNT fabrics as cathode material with high electrochemical performance for lithium ion batteries
( Elsevier , 2018 , Article)© 2018 Elsevier Ltd MnF2 infiltrated-CNT fabrics was prepared by surfactant-aided impregnation of MnSiF6 precursors in acid-treated CNT fabric followed by annealing MnSiF6-loaded CNT fabric. The structural and morphological ... -
Suspensions of carbon nanofibers in organic medium: Rheo-electrical properties
( Royal Society of Chemistry , 2015 , Article)The nonaqueous suspensions of carbon nanofibers (CNFs) in 1 M lithium bis(trifluoromethanesulfonaimide) in propylene carbonate electrolyte reveal unique structural evolution and shear-induced transition due to the high ... -
Synchronous spectrofluorimetric study of the supramolecular host–guest interaction of β-cyclodextrin with propranolol: A comparative study
( Elsevier , 2015 , Article)The objective of this work is to assess the use of constant-wavelength synchronous fluorescence spectroscopy (SFS) in comparison to conventional fluorescence spectroscopy (CFS) for the investigation of the supramolecular ...
