Log in

Relevant bibliographies by topics / Basic media and aprotic solvent / Journal articles

To see the other types of publications on this topic, follow the link: Basic media and aprotic solvent.

Journal articles on the topic 'Basic media and aprotic solvent'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Basic media and aprotic solvent.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Janderka, Pavel, Oldřich Fischer, and Eva Fischerová. "Effect of the Solvent Basicity and Additives on the Electroreduction of Picric Acid and Tetramethylammonium Picrate in Aprotic Media." Collection of Czechoslovak Chemical Communications 62, no. 4 (1997): 581–96. http://dx.doi.org/10.1135/cccc19970581.

Full text

Abstract:

The electroreduction of picric acid and tetramethylammonium picrate in acetonitrile, acetone, N,N-dimethylformamide, dimethyl sulfoxide and hexamethylphosphoramide has been studied by normal pulse polarography, cyclic voltammetry and by coulometric analysis. The reduction of undissociated acid starts in all aprotic media with consumption of one electron. The reduction potential is shifted to more negative potentials with rising basicity of the solvent, i.e. with rising dissociation constant of picric acid. The formation of anion radicals is followed by the sequence of acido-basic selfprotonati

APA, Harvard, Vancouver, ISO, and other styles

2

Nevěčná, Taťjana, Vojtěch Bekárek, and Oldřich Pytela. "A Study of Effects of Temperature and Medium on Reaction of Triethylamine with Ethyl Bromide." Collection of Czechoslovak Chemical Communications 59, no. 6 (1994): 1384–91. http://dx.doi.org/10.1135/cccc19941384.

Full text

Abstract:

The rate constants of reaction of triethylamine with ethyl bromide have been measured in 13 solvents at the temperatures of 293, 313, 333, and 373 K. The activation entropies in the individual solvents increase when going from nonpolar to dipolar aprotic and polar protic solvents, which is explained by dominant solvation of the basic triethylamine and by formation of highly ordered associates without solvent in the activated complex in nonpolar solvent media. No isokinetic relationship has been found between the activation entropy and activation enthalpy, which indicates different solvent effe

APA, Harvard, Vancouver, ISO, and other styles

3

Kankaanperä, Alpo, Pirketta Scharlin, Ilona Kuusisto, Riitta Kallio, and Emma Bernoulli. "Ureas and amides as dipolar aprotic solvents in highly basic media. The dependence of kinetic basicity on solvent composition." Journal of the Chemical Society, Perkin Transactions 2, no. 2 (1999): 169–74. http://dx.doi.org/10.1039/a808435a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Morteza, Shiri, Farajpour Behnaz, Bozorgpour-Savadjani Zahra, et al. "Transition-metal free highly selective aerobic oxidation of hindered 2-alkylindoles." Tetrahedron 71, no. 34 (2015): 5531–37. https://doi.org/10.1016/j.tet.2015.06.065.

Full text

Abstract:

A novel and easy access to highly complex 3-oxoindolin-2-ylidene derivatives from the exposure of Ugiadducts bearing an indolyl moiety in Cs2CO3/DMF to air is reported. This is the first example of aerobic oxidation of 2-alkylindoles to 3-oxoindolin-2-ylidenes. Some advantages of this method are the use of air as oxygen source, transition metal-free reagents and simple conditions, a multicomponent and one-pot process and highly regioand stereoselective manner to trans-3-oxoindolin-2-ylidenes.

APA, Harvard, Vancouver, ISO, and other styles

5

Petukhov, Dmitrii I., Dmitrii A. Buldakov, Alexey A. Tishkin, Alexey V. Lukashin, and Andrei A. Eliseev. "Liquid permeation and chemical stability of anodic alumina membranes." Beilstein Journal of Nanotechnology 8 (March 6, 2017): 561–70. http://dx.doi.org/10.3762/bjnano.8.60.

Full text

Abstract:

A study on the chemical stability of anodic alumina membranes and their performance in long-term water and organic solvent permeation experiments is reported. Anodic alumina possesses high stability for both protonic and aprotonic organic solvents. However, serious degradation of the membrane occurs in pure water, leading to a drastic decrease of permeance (over 20% of the initial value after the passing of 0.250 m3/m2 of pure water). The drying of the membrane induces further permeance drop-off. The rate of membrane degradation strongly depends on the pH of the penetrant solution and increase

APA, Harvard, Vancouver, ISO, and other styles

6

Mchedlov-Petrossyan, Nikolay O. "Nikolai Izmailov (1907-1961): An appreciation." Pure and Applied Chemistry 80, no. 7 (2008): v. http://dx.doi.org/10.1351/pac20088007v.

Full text

Abstract:

The International Conference on Modern Physical Chemistry for Advanced Materials was organized primarily to commemorate the centenary of the birth of Prof. Nikolai Izmailov and to pay tribute to his scientific achievements and legacy. Nikolai Arkadievich Izmailov was born in Sukhumi, in the southern region of the Russian Empire, on 22 June 1907. After his family moved to Kharkov (in Ukrainian: Kharkiv), he developed an early interest in chemistry and eventually enrolled as a Ph.D. student at Kharkov State University (at that time, it was called the Kharkov Institute of Public Education) in 192

APA, Harvard, Vancouver, ISO, and other styles

7

Bowden, Keith, and Shyla Prasannan. "Reactions in strongly basic media. Part 8. Correlation of the rates of alkaline hydrolysis of 2,4-dinitroanisole and 2-methoxy-5-nitropyridine in aqueous dipolar aprotic solvents with acidity functions. An order of basicity for aqueous dipolar aprotic solvents." Journal of the Chemical Society, Perkin Transactions 2, no. 2 (1987): 185. http://dx.doi.org/10.1039/p29870000185.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Panteleev, S. V., S. V. Maslennikov, A. N. Egorochkin, and V. Yu Vakulenko. "Solvent effect on metal oxidation rates in aprotic media." Russian Journal of General Chemistry 77, no. 6 (2007): 1004–7. http://dx.doi.org/10.1134/s1070363207060084.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Kushch, S. D. "Nitrobenzene Hydrogenation to N-phenylhydroxylamine: a New Approach to the Selectivity." Eurasian Chemico-Technological Journal 4, no. 1 (2017): 19. http://dx.doi.org/10.18321/ectj513.

Full text

Abstract:

A new approach to resolve the problem of selectivity with respect to N-phenylhydroxylamine in nitrobenzene hydrogenation is proposed. N-phenylhydroxylamine only is the final product of nitrobenzene electroreduction in aprotic media. In this case nitrobenzene reduction carries out by alternation of electrochemical (electron transfer) and chemical (species formed protonation) stages i.e. by so-called EC mechanism. Such mechanism realization in nitrobenzene hydrogenation is possible if i) a catalyst activates hydrogen as “hydrogen electrode” i.e. serves electrons source; ii) a reaction media cont

APA, Harvard, Vancouver, ISO, and other styles

10

Amanchukwu, Chibueze. "(Invited) Manipulating Water Using Aprotic Solvents for CO2 Electrochemical Reduction." ECS Meeting Abstracts MA2024-02, no. 62 (2024): 4164. https://doi.org/10.1149/ma2024-02624164mtgabs.

Full text

Abstract:

Carbon dioxide (CO2) electrochemical conversion is vital because it provides a pathway to efficiently valorize CO2 and incentivize CO2 capture. Electrocatalytic CO2 reduction reaction (CO2RR) is of great interest because it is scalable and can be done at ambient temperature and pressure. However, these reactions are typically performed in water which suffers from undesired hydrogen evolution reaction (HER) from water breakdown. Aprotic nonaqueous electrolytes can suppress HER and enable a wider range of catalysts for CO2RR. However, water is still needed as a proton source and to stabilize cha

APA, Harvard, Vancouver, ISO, and other styles

11

Chmurzynski, L., and Z. Warnke. "Acid-Base Equilibria of Substituted Pyridine N-Oxides in N,N-Dimethylformamide and Dimethyl Sulfoxide." Australian Journal of Chemistry 46, no. 2 (1993): 185. http://dx.doi.org/10.1071/ch9930185.

Full text

Abstract:

Acidity constants have been determined potentiometrically for a variety of conjugate acids of substituted pyridine N-oxides in N,N- dimethylformamide ( dmf ) and dimethyl sulfoxide ( dmso ). The pKa values in these solvents varied in the same direction and correlated with the pKa values of these species in water and in the protophobic aprotic solvent acetonitrile. Further, a linear relationship has been established between the pKa values in the two protophilic aprotic solvents under study. The most basic substituted pyridine N-oxides exhibited a weak tendency towards cationic homoconjugation i

APA, Harvard, Vancouver, ISO, and other styles

12

Nagy, Otto B., Victor Reuliaux, Nicole Bertrand, Anne van Der Mensbrugghe, Jean Leseul, and Janos B. Nagy. "Mechanism of Ester Aminolysis in Aprotic Media and Specific Solvent Effects." Bulletin des Sociétés Chimiques Belges 94, no. 11-12 (2010): 1055–74. http://dx.doi.org/10.1002/bscb.19850941127.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Wagnerczauderna, E., and MK Kalinowski. "Hammett-Streitwieser Reaction Constants for the Electroreduction of Diaryl Ketones in Aprotic Media." Australian Journal of Chemistry 49, no. 8 (1996): 901. http://dx.doi.org/10.1071/ch9960901.

Full text

Abstract:

Cyclic voltammetry has been used to measure formal potentials of seven aromatic ketone/ketyl radical anion systems in benzonitrile, acetonitrile , propylene carbonate, acetone, N,N- dimethylformamide, N-methylpyrrolidin-2-one, dimethyl sulfoxide and hexamethylphosphoric triamide. The values measured in each solvent obey the Hammett- Streitwieser equation; the reaction constants were found to depend on the solvent acidity and basicity expressed by acceptor and donor numbers, respectively. The results are discussed in terms of the solvation of the products and reactants of the electrode reaction

APA, Harvard, Vancouver, ISO, and other styles

14

Smith, Gregory N. "Proton transfer in nonpolar solvents: an approach to generate electrolytes in aprotic media." Physical Chemistry Chemical Physics 20, no. 28 (2018): 18919–23. http://dx.doi.org/10.1039/c8cp02349b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Fejzic, Hannah, Ritesh Kumar, Reginaldo Gomes, et al. "Water Clustering Modulates Activity and Enables Hydrogenated Product Formation during Carbon Monoxide Electroreduction in Aprotic Media." ECS Meeting Abstracts MA2024-02, no. 62 (2024): 4250. https://doi.org/10.1149/ma2024-02624250mtgabs.

Full text

Abstract:

As the effects of climate change are becoming increasingly visible, carbon dioxide electroreduction reaction (CO2RR) is gaining popularity to convert waste carbon dioxide to value-added products. As carbon monoxide (CO) is a key intermediate for valuable products such as methane and ethylene, CORR is studied to bypass CO2 activation. Most of the work on CO2RR and CORR has focused on using water as a proton source as water’s hydrogen bonding supports key intermediates and acts as a proton source for hydrogenated products. Using nonaqueous solvents instead of water decreases the competitive hydr

APA, Harvard, Vancouver, ISO, and other styles

16

Carter, Stephen J., Bruce M. Foxman, and Louis S. Stuhl. "Cobalt(II) cyanides in aprotic media: effect of varying counterion and solvent." Inorganic Chemistry 25, no. 16 (1986): 2888–94. http://dx.doi.org/10.1021/ic00236a046.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Akatyev, Nikolay. "THEORETICAL INVESTIGATION OF 2,6-DIFLUORO-4-NITROANILINE WITH SEMI-EMPIRICAL LEVELS OF THEORY." DULATY UNIVERSITY BULLETIN 3, no. 11 (2023): 145–53. http://dx.doi.org/10.55956/huyg3105.

Full text

Abstract:

Abstract. In this work quantum chemical approach was applied in order to investigate the electronic structure and certain properties of 2,6-difluoro-4-nitroaniline with a series of semi-empirical methods using the GAMESS software. Protic and aprotic Polarized Continuum solvent models were used to study the influence of the media to the electronic structure and geometry of the molecule. It has been found that calculations using solvent models make possibility to obtain more accurate results than for vacuum. The comparison of calculated results with the available XRD crystallographic data shows

APA, Harvard, Vancouver, ISO, and other styles

18

U., Arvind, and Kumar Sanjay. "Non-specific solvent effects on proton transfer equilibrium between toluic acids and carbinol base of crystal violet." Journal of Indian Chemical Society Vol. 87, Mar 2010 (2010): 361–63. https://doi.org/10.5281/zenodo.5779115.

Full text

Abstract:

Department of Chemistry, Rajendra College, Chapra-841 301, Bihar, India Department of Chemistry, Jagdam College, Chapra-841 301, Bihar, India <em>Manuscript received 27 April 2009, accepted 20 August 2009</em> Acid-base reactions In apolar aprotic media provide a sufficiently close measure of intrinsic acid/base strengths. A study on reaction equilibria between <em>o</em>- and m-methyl benzoic: (toluic) acids with the carbinol base of crystal violet in five apolar aprotic solvents of similar Kirkwood polarity function (\(\in\) - 1)/(2\(\in\)+ 1) and significantly different Dimroth Reichar

APA, Harvard, Vancouver, ISO, and other styles

19

Carac, Andreea, Rica Boscencu, Andreea Veronica Dediu, Simona Gabriela Bungau, and Rodica Mihaela Dinica. "Solvent Effects on the Spectral and Electrochemical Properties of Some Pyridinium Quaternary Compounds." Revista de Chimie 68, no. 7 (2017): 1423–28. http://dx.doi.org/10.37358/rc.17.7.5688.

Full text

Abstract:

The physicochemical properties and the redox potential of two pyridinium compounds, a diquaternary salt of 4,4�-bipyridinium (BP) and one of 1,2-bis(4-pyridyl)ethane (BPE) were studied. Cyclic voltammetry on platinum electrode was used to evaluate the solvent influence on the redox properties of the pyridinium compounds. Electrochemical measurements were performed in aqueous media, ethanol and aprotic solvent. The solvent variation causes changes in the electro-oxidation processes of the heterogeneous electron transfer at the applied potential. The presence of the ethylenic group in the struct

APA, Harvard, Vancouver, ISO, and other styles

20

Ābele, Līga, Ieva Baķe, Laimdota Vilcēna, and Silvija Kukle. "Development of Graphene-Based Functional Coating for the Surface Modification of Textiles." Materials Science Forum 1104 (November 10, 2023): 77–85. http://dx.doi.org/10.4028/p-i7kxsv.

Full text

Abstract:

The objective of the presented research is to improve the ballistic performance of para-aramid woven fabric by deposition of graphene coatings directly on woven textile substrates. The improvement of mechanical properties of the ballistic fabric is attributed to the formation of a highly ordered layered structure and the efficient load transfer between the fabric fibers and the graphene nanosheets. The results of deposition of layered graphene coatings on woven textiles are discussed here. The pristine graphite directly subjected to a solvent treatment in this work, which resulted in the produ

APA, Harvard, Vancouver, ISO, and other styles

21

Perfilov, Maxim M., Elvira R. Zaitseva, Nadezhda S. Baleeva, et al. "Meta-CF3-Substituted Analogues of the GFP Chromophore with Remarkable Solvatochromism." International Journal of Molecular Sciences 24, no. 12 (2023): 9923. http://dx.doi.org/10.3390/ijms24129923.

Full text

Abstract:

In this work, we have shown that the introduction of a trifluoromethyl group into the me-ta-position of arylidene imidazolones (GFP chromophore core) leads to a dramatic increase in their fluorescence in nonpolar and aprotic media. The presence of a pronounced solvent-dependent gradation of fluorescence intensity makes it possible to use these substances as fluorescent polarity sensors. In particular, we showed that one of the created compounds could be used for selective labeling of the endoplasmic reticulum of living cells.

APA, Harvard, Vancouver, ISO, and other styles

22

AlMarzouq, Douaa Salman, and Noha M. Hilmy Elnagdi. "Glycerol and Q-Tubes: Green Catalyst and Technique for Synthesis of Polyfunctionally Substituted Heteroaromatics and Anilines." Molecules 24, no. 9 (2019): 1806. http://dx.doi.org/10.3390/molecules24091806.

Full text

Abstract:

The role of glycerol as a green bio-based solvent, reactant, and/or a catalyst in the synthesis of novel heterocycles, under pressure, is studied. Synthesis of novel quinolines in good yields using a new modified Skraup synthesis, utilizing glycerol and pressure Q-tubes, is demonstrated. Novel aniline trimers are prepared using glycerol, and substituted anilines under pressure, in acidic medium and water. Glycerol was employed as a catalyst and a green solvent in the synthesis of novel pyridazines 13a–c. The mechanisms of the reactions and the catalytic effect of glycerol in protic and aprotic

APA, Harvard, Vancouver, ISO, and other styles

23

Golzardi, Maryam, and Una Glamočlija. "Solubility of phytochemicals and challenges in in vitro studies: a literature review." Periodicals of Engineering and Natural Sciences (PEN) 13, no. 2 (2025): 417–24. https://doi.org/10.21533/pen.v13.i2.456.

Full text

Abstract:

Poor solubility remains a critical barrier in the in vitro evaluation of phytochemicals, many of which are hydrophobic and difficult to dissolve in aqueous media. This review explores the physicochemical factors influencing phytochemical solubility, emphasizing the role of solvent properties such as polarity, proximity, and cytotoxicity. Commonly used solvents—including polar protic, polar aprotic, and non-polar solvents —are discussed concerning their solubilizing capacity and compatibility with biological systems. Solvent-induced changes in membrane dynamics and cytotoxic profiles are also e

APA, Harvard, Vancouver, ISO, and other styles

24

Mazloum-Ardakani, Mohammad, Shahram Lotfi, Jahanbakhsh Ghasemi, Alahdad Shababi, and Mohammad Noroozi. "Spectrophotometric determination of the acidity constants of calcon in water and mixed water-organic solvents." Journal of the Serbian Chemical Society 74, no. 2 (2009): 159–69. http://dx.doi.org/10.2298/jsc0902159m.

Full text

Abstract:

The acid-base properties of calcon (1-(2-hydroxy-1-naphthylazo)-2- -naphthol-4-sulfonic acid) in water and mixed water-organic solvents at 25 ?C at an ionic strength of 0.10 M are studied by a multiwavelength spectrophotometric method. The organic solvents used were the amphiprotic (methanol), dipolar aprotic (dimethylsulfoxide), and low basic aprotic (acetonitrile). To evaluate the pH absorbance data, a resolution method based on the combination of soft- and hard-modeling was applied. The acidity constants of all related equilibria were estimated using the whole spectral fitting of the collec

APA, Harvard, Vancouver, ISO, and other styles

25

Verma, Sanno. "EFFECT OF AQUO-N-PROPANOL SOLVENT SYSTEMS ON THE MEDICINAL EFFICIENCY OF HEAVY PROPIONATES." SCHOLARLY RESEARCH JOURNAL FOR INTERDISCIPLINARY STUDIES 9, no. 69 (2021): 16489–98. http://dx.doi.org/10.21922/srjis.v9i69.10048.

Full text

Abstract:

For highlighting the Solvent-effect of a diapolar aprotic solvent, n-propanol on the biochemical behaviour of propionate ester, the kinetics of alkali catalysed hydrolysis of butyl propionate was carried out in aquo-n-propanol solvent systems having different concentration of the organic component (n-propanol) varying from 20 to 80% (v/v) at different temperatures ranging from 20 to 40°C. The number of water molecules associated with the activated complex of the reaction were found to increase from 0.338 to 1.401 and from this, it is it inferred that n-propanol acts as structure breaker of wat

APA, Harvard, Vancouver, ISO, and other styles

26

Pytela, Oldřich. "A new classification of solvents based on chemometric empirical scale of parameters." Collection of Czechoslovak Chemical Communications 55, no. 3 (1990): 644–52. http://dx.doi.org/10.1135/cccc19900644.

Full text

Abstract:

The paper presents a classification of 51 solvents based on clustering in three-dimensional space formed by the empirical scale of PAC, PBC, and PPC parameters designed for interpretation of solvent effect on a model with cross-terms. For the classification used are the clustering methods of the nearest neighbour, of the furthest neighbour, of average bond, and the centroid method. As a result, the solvents have been divided into 8 classes denoted as: I - nonpolar-inert solvents (aliphatic hydrocarbons), IIp - nonpolar-polarizable (aromatic hydrocarbons, tetrachloromethane, carbon disulphide),

APA, Harvard, Vancouver, ISO, and other styles

27

Milescu, Roxana A., C. Robert McElroy, Thomas J. Farmer, Paul M. Williams, Matthew J. Walters, and James H. Clark. "Fabrication of PES/PVP Water Filtration Membranes Using Cyrene®, a Safer Bio-Based Polar Aprotic Solvent." Advances in Polymer Technology 2019 (July 7, 2019): 1–15. http://dx.doi.org/10.1155/2019/9692859.

Full text

Abstract:

A more sustainable dialysis and water filtration membrane has been developed, by using the new, safer, bio-based solvent Cyrene® in place of N-methyl pyrrolidinone (NMP). The effects of solvent choice, solvent evaporation time, the temperature of casting gel, and coagulation bath together with the additive concentration on porosity and pore size distribution were studied. The results, combined with infrared spectra, SEM images, porosity results, water contact angle (WCA), and water permeation, confirm that Cyrene® is better media to produce polyethersulfone (PES) membranes. New methods, Mercur

APA, Harvard, Vancouver, ISO, and other styles

28

Sukhanova, Tatyana E., Andrey L. Didenko, Ilya L. Borisov, et al. "Morphological Analysis of Poly(4,4′-oxydiphenylene-pyromellitimide)-Based Organic Solvent Nanofiltration Membranes Formed by the Solution Method." Membranes 12, no. 12 (2022): 1235. http://dx.doi.org/10.3390/membranes12121235.

Full text

Abstract:

Poly-(4,4′-oxydiphenylene) pyromellitimide or Kapton is the most widely available polyimide with high chemical and thermal stability. It has great prospects for use as a membrane material for filtering organic media due to its complete insolubility. However, the formation of membranes based on it, at the moment, is an unsolved problem. The study corresponds to the rediscovery of poly(4,4′-oxydiphenylene–pyromellitimide)-based soluble copoly(urethane-imides) as membrane polymers of a new generation. It is shown that the physical structure of PUI films prepared by the solution method becomes por

APA, Harvard, Vancouver, ISO, and other styles

29

Kolling, Orland W. "Solvent Reaction Field Effects upon the Trans/Gauche Conformational Equilibrium of 1,2-Dichloroethane in Aprotic Media." Transactions of the Kansas Academy of Science (1903-) 101, no. 3/4 (1998): 89. http://dx.doi.org/10.2307/3627955.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Omer, M. E., A. M. Qandil, A. S. Ali, and H. J. Habib. "Preparation and solubility profile study of sodium and potassium salts of mefenamic acid: the effect of pH and polarity." Digest Journal of Nanomaterials and Biostructures 16, no. 2 (2021): 443–54. http://dx.doi.org/10.15251/djnb.2021.162.443.

Full text

Abstract:

Enhancing the solubility of active pharmaceutical ingredients became a fundamental concept in the manufacturing of different pharmaceutical dosage forms. This research aims to enhance the solubility of mefenamic acid by salt formation method and study the effect of polarity, pH, and temperature on the solubility of mefenamic acid and its salts. Two deferent salts of mefenamic acid (sodium and potassium salts) were prepared. Using the asymmetric factorial as an experimental design, the solubility of mefenamic acid (MA), sodium mefenamate (Na-MA), and potassium mefenamate (K-MA) were studied in

APA, Harvard, Vancouver, ISO, and other styles

31

Nielson, Roger M., George E. McManis, and Michael J. Weaver. "Solvent relaxation in electron-transfer reactions: comparisons between barrier-crossing dynamics in water and polar aprotic media." Journal of Physical Chemistry 93, no. 12 (1989): 4703–6. http://dx.doi.org/10.1021/j100349a005.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Preda, Loredana, and Elena Volanschi. "Electrochemical study and MO — modeling of the reduction behaviour of some arylidene substituted derivatives of dibenz [b,e]-thiepin-5,5-dioxide-11-one." Open Chemistry 7, no. 3 (2009): 486–93. http://dx.doi.org/10.2478/s11532-009-0046-7.

Full text

Abstract:

AbstractThe electrochemical reduction of four arylidene substituted derivatives of dibenz-[b,e]-thiepin-5,5-dioxide-11- one has been studied by cyclic voltammetry on platinum (Pt) electrode in aprotic media (DMSO), coupled with spectral EPR techniques. From the analysis of cyclic voltammetry experiments, aided by digital simulations using DigiSim software, the kinetic and thermodynamic parameters were evaluated for each system. The electrochemical behaviour is strongly directed by the nature of the arylidene substituents bound to the central heterocycle. The electrochemical investigation and s

APA, Harvard, Vancouver, ISO, and other styles

33

Aditi, Shelke* Shritej Varhadi Dr. Lokhande R. P. Mahadik Jay Dhamane Yash. "Indole Synthesis: A Review and Medicinal Uses of Their Derivatives." International Journal of Pharmaceutical Sciences 3, no. 5 (2025): 4361–69. https://doi.org/10.5281/zenodo.15517986.

Full text

Abstract:

A large variety of bioactive natural products and molecules with significant therapeutic value include indoles, a functional group that is widely distributed in nature. The development of new techniques for the synthesis of indole core and site-specific indoles has consequently increased exponentially. Greener techniques that employ solid acid catalysts, ionic liquids, water as a solvent, microwave irradiation, and solvent-free nanoparticles are replacing conventional methods for the synthesis of indoles. Additionally, the substituted indoles have a wide range of uses. 3-The sulfur-substituted

APA, Harvard, Vancouver, ISO, and other styles

34

Kolling, Orland W. "Reaction Field Models for the Solvent Influence upon the Fundamental Carbonyl Vibrational Peak of 2-Butanone in Aprotic Media." Journal of Physical Chemistry 100, no. 40 (1996): 16087–91. http://dx.doi.org/10.1021/jp9617682.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Bisz, Elwira, Pamela Podchorodecka, and Michal Szostak. "N -Methylcaprolactam as a Dipolar Aprotic Solvent for Iron-Catalyzed Cross-Coupling Reactions: Matching Efficiency with Safer Reaction Media." ChemCatChem 11, no. 4 (2019): 1196–99. http://dx.doi.org/10.1002/cctc.201802032.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Tsoutsoura, Aikaterini, Zhiqi He, and Paschalis Alexandridis. "Phase Behavior and Structure of Poloxamer Block Copolymers in Protic and Aprotic Ionic Liquids." Molecules 28, no. 21 (2023): 7434. http://dx.doi.org/10.3390/molecules28217434.

Full text

Abstract:

Ionic liquids are promising media for self-assembling block copolymers in applications such as energy storage. A robust design of block copolymer formulations in ionic liquids requires fundamental knowledge of their self-organization at the nanoscale. To this end, here, we focus on modeling two-component systems comprising a Poly(ethylene oxide)-poly (propylene oxide)-Poly(ethylene oxide) (PEO-PPO-PEO) block copolymer (Pluronic P105: EO37PO58EO37) and room temperature ionic liquids (RTILs): protic ethylammonium nitrate (EAN), aprotic ionic liquids (1-butyl-3-methylimidazolium hexafluorophospha

APA, Harvard, Vancouver, ISO, and other styles

37

Abdel-Mottaleb, M. S. A., H. R. Galal, A. F. M. Dessouky, et al. "Fluorescence and photostability studies of anthracene-9-carboxylic acid in different media." International Journal of Photoenergy 2, no. 1 (2000): 47–53. http://dx.doi.org/10.1155/s1110662x00000076.

Full text

Abstract:

Electronic absorption and fluorescence spectra of anthracene-9-carboxylic acid (ANCA) were studied in different homogeneous solvents, binary protic/aprotic solvent mixtures and in heterogeneous solutions of the cationic cetyltrimethyl ammonium bromide (CTAB) micelle. Different chemical species of ANCA were identified spectroscopically in different media. The results are discussed on the basis of a mechanism that involves two equilibria: acid-base equilibrium and monomer-dimer equilibrium. These equilibria were found to be very sensitive to the nature of the medium and the concentration of ANCA

APA, Harvard, Vancouver, ISO, and other styles

38

Keppeler, Miriam, Jürgen Holzbock, Johanna Akbarzadeh, Herwig Peterlik, and Nicola Hüsing. "Inorganic–organic hybrid materials through post-synthesis modification: Impact of the treatment with azides on the mesopore structure." Beilstein Journal of Nanotechnology 2 (August 26, 2011): 486–98. http://dx.doi.org/10.3762/bjnano.2.52.

Full text

Abstract:

Hybrid, hierarchically organized, monolithic silica gels, comprising periodically arranged mesopores and a cellular macroscopic network, have been prepared through a co-condensation reaction of tetrakis(2-hydroxyethyl)orthosilicate with chloromethyl-trimethoxysilane or 3-(chloropropyl)-triethoxysilane. Subsequent conversion of the chloro groups into azido groups, by nucleophilic substitution with NaN3 in N,N-dimethylformamide, was conducted upon preservation of the monolithic structure. However, treatment with NaN3 had a strong influence on the structure in the mesoporous regime, with changes

APA, Harvard, Vancouver, ISO, and other styles

39

Valverde, Clodoaldo, João Victor Batista Soares, André Duarte da Silva, et al. "Theoretical study of solvent effects on the hyperpolarizabilities of two chalcone derivatives." Revista Colombiana de Química 49, no. 1 (2020): 33–39. http://dx.doi.org/10.15446/rev.colomb.quim.v1n49.82156.

Full text

Abstract:

The use of organic as nonlinear optical materials has been intensively explored in the recent years due to the ease of manipulation of the molecular structure and the synthetic flexibility regarding the change of substituent groups. In the present work, the linear and nonlinear properties of two chalcones derivatives (E)-1-(4-methylphenyl)-3-phenylprop-2-en-1-one (4MP3P) and (E)-1-(4-Nitrophenyl)-3-phenylprop-2-en-1-one (4NP3P), that differ by the substituent position at the phenyl ring, were studied in the presence of protic and aprotic solvents simulated by the Polarizable Continuum Model (P

APA, Harvard, Vancouver, ISO, and other styles

40

Vander Hoogerstraete, Tom, Ernesto Rezende Souza, Bieke Onghena, Dipanjan Banerjee, and Koen Binnemans. "Mechanism for Solvent Extraction of Lanthanides from Chloride Media by Basic Extractants." Journal of Solution Chemistry 47, no. 8 (2018): 1351–72. http://dx.doi.org/10.1007/s10953-018-0782-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Svartman, Esther Lea, José Alberto Caram, María Virginia Mirífico, and Enrique Julio Vasini. "Electrochemistry of 1,2,5-thiadiazole 1,1-dioxide derivatives with 3,4 substituents presenting separated, connected, and fused Pi-systems." Canadian Journal of Chemistry 77, no. 4 (1999): 511–17. http://dx.doi.org/10.1139/v99-051.

Full text

Abstract:

The voltammetric electroreduction properties of 1,2,5-thiadiazole 1,1-dioxide derivatives with different 3,4 substituents have been investigated in aprotic (mainly acetonitrile) solvent solution. The 3,4 substituents, selected according to the characteristics of their π-system, were phenanthro-9,10 (connected π-system) and acenaphtho-1,2 (fused π-system). New measurements are also presented for 3,4-diphenyl (separated π-systems). The basic properties of the substrates were investigated through voltammetry in acidic acetonitrile solutions. The substrates were more easily electroreduced (between

APA, Harvard, Vancouver, ISO, and other styles

42

Tran, Chau B., Quoc Bao Le, and Rudolf Kiefer. "Linear Actuation of Dielectrophoretic Formed Multi-Walled Carbon Nanotube Fiber with Carbide-Derived Carbon in Polar Aprotic and Polar Protic Solvents." Materials 18, no. 14 (2025): 3254. https://doi.org/10.3390/ma18143254.

Full text

Abstract:

Carbon nanotube (CNT) fiber research focuses on developing functional fabrics with dual or multifunctional capabilities. This study investigates CNT fibers fabricated via dielectrophoresis (DEP) with the incorporation of 10 wt.% carbide-derived carbon (CDC), referred to as CNTCDC fibers. The linear actuation behavior of the CNT and the CNTCDC fibers is compared using identical electrolyte concentrations in both a polar aprotic solvent (propylene carbonate, PC) and a polar protic solvent (aqueous solution, aq). Electromechanical deformation (EMD) is studied through cyclic voltammetry and chrono

APA, Harvard, Vancouver, ISO, and other styles

43

Arshad, Mahwish, Nasir Rasool, Muhammad Usman Qamar, Syed Adnan Ali Shah, and Zainul Amiruddin Zakaria. "Facile Synthesis of Functionalized Phenoxy Quinolines: Antibacterial Activities against ESBL Producing Escherichia coli and MRSA, Docking Studies, and Structural Features Determination through Computational Approach." Molecules 27, no. 12 (2022): 3732. http://dx.doi.org/10.3390/molecules27123732.

Full text

Abstract:

The synthesis of new 6-Bromoquinolin-4-ol derivatives (3a–3h) by Chan–Lam coupling utilizing different types of solvents (protic, aprotic, and mixed solvents) and bases was studied in the present manuscript. Furthermore, their potential against ESBL producing Escherichia coli (ESBL E. coli) and methicillin-resistant Staphylococcusaureus (MRSA) were investigated. Commercially available 6-bromoquinolin-4-ol (3a) was reacted with different types of aryl boronic acids along with Cu(OAc)2 via Chan–Lam coupling methodology utilizing the protic and aprotic and mixed solvents. The molecules (3a–3h) ex

APA, Harvard, Vancouver, ISO, and other styles

44

Nagani, Afzal, Moksh Shah, Salman Patel, and M. R. Yadav. "Sustainable synthesis of piperazine analogs using varied energy sources in the petasis reaction: A green chemistry perspective." INDIAN JOURNAL OF HETEROCYCLIC CHEMISTRY 34, no. 03 (2024): 399. http://dx.doi.org/10.59467/ijhc.2024.34.399.

Full text

Abstract:

The Petasis reaction between substituted boronic acids (1a-c), N-Boc-piperazine, and glyoxylic acid in the conventional method of synthesis needs continuous refluxing for 16 h in a solvent like acetonitrile (ACN) to obtain the products. Using the same reactants, the source of energy was changed to microwave irradiation, ultrasonication, or mechanical energy (Trituration) to obtain good yields of the products consuming much less energy and time. Apart from the use of different sources of energy, the solvents as the media of the reactants were also changed. In microwave synthesis, more than 95%

APA, Harvard, Vancouver, ISO, and other styles

45

Langton, Matthew J., and Paul D. Beer. "Nitrate anion templated synthesis of a [2]catenane for nitrate recognition in organic–aqueous solvent media." Chem. Commun. 50, no. 60 (2014): 8124–27. http://dx.doi.org/10.1039/c4cc03200d.

Full text

Abstract:

The first example of a catenane synthesised using a nitrate anion template is demonstrated. The resulting interlocked host is capable of selectively recognising nitrate over a range of more basic oxoanions in a competitive organic–aqueous solvent mixture.

APA, Harvard, Vancouver, ISO, and other styles

46

Fernández-Bautista, Marcos, Sergio Martínez-Gómez, Sandra Rivas, José Luis Alonso, and Juan Carlos Parajó. "Advances on Cellulose Manufacture in Biphasic Reaction Media." International Journal of Molecular Sciences 24, no. 15 (2023): 12404. http://dx.doi.org/10.3390/ijms241512404.

Full text

Abstract:

Cellulose is produced industrially by the kraft and sulfite processes. The evolution of these technologies in biorefineries is driven by the need to obtain greater added value through the efficient use of raw materials and energy. In this field, organosolv technologies (and within them, those using liquid phases made up of water and one partly miscible organic solvent, known as “biphasic fractionation” in reference to the number of liquid phases) represent an alternative that is receiving increasing interest. This study considers basic aspects of the composition of lignocellulosic materials, d

APA, Harvard, Vancouver, ISO, and other styles

47

Mohammed, Sawsan A. M., and Sally D. Maan. "The Effect of Asphaltene on the Stability of Iraqi Water in Crude Oil Emulsions." Iraqi Journal of Chemical and Petroleum Engineering 17, no. 2 (2016): 37–45. http://dx.doi.org/10.31699/ijcpe.2016.2.5.

Full text

Abstract:

In the present work, asphaltenes and resins separated from emulsion samples collected from two Iraqi oil wells, Nafut Kana (Nk) and Basrah were used to study the emulsion stability. The effect of oil resins to asphaltene (R/A) ratio, pH of the aqueous phase, addition of paraffinic solvent (n-heptane), aromatic solvent (toluene), and blend of both (heptol) in various proportions on the stability of emulsions had been investigated. The conditions of experiments were specified as an agitation speed of 1000 rpm for 30 minutes, heating at 50 °C, and water content of 30%. The results showed that as

APA, Harvard, Vancouver, ISO, and other styles

48

Santos, Kryslaine M. A., Simone J. Canhaci, Rafael F. Perez, and Marco A. Fraga. "Hexoses Biorefinery: Driving Glucose Dehydration over Sulfonic Polymer and Hybrid Acid Catalysts." Reactions 6, no. 2 (2025): 26. https://doi.org/10.3390/reactions6020026.

Full text

Abstract:

Glucose is the most abundant monosaccharide as it is the primary unit of cellulose and starch, which are the more relevant feedstocks for biorefineries. Dehydration of glucose can lead to anhydroglucoses, whose interest has been increasing due to its potential industrial use. Commercial sulfonic polymer resins and a synthesized organic–inorganic mesoporous material were taken as Brønsted acid catalysts. High hexose conversion (up to 98%) and selectivity to anhydroglucoses (~80%) could be reached, turning this process into an alternative route to carbohydrate pyrolysis that presents an energy-i

APA, Harvard, Vancouver, ISO, and other styles

49

Debashree, Singh, Chatterjee Abhik, Chall Sayantani, et al. "Spectroscopic study of photo-physical parameters of dyes in different solvents environment." Education in Chemical Science and Technology Vol. 12, Feb 2023 (2023): 120–29. https://doi.org/10.5281/zenodo.7777314.

Full text

Abstract:

Department of Chemistry, Haldia Institute of Technology, Haldia, West Bengal, India. Department of Chemistry, Raigang University, Uttar Dinajpur, West Bengal, India. <em>Email id*- </em><em>pijuskhatua@gmail.com</em> (corresponding Author) <em>Email id*- </em><em>abhikchemistry@gmail.com</em> (corresponding Author) Surrounding condition has a great role on the spectral characteristics of photosensitive dyes. Solvents having different characteristic and influence in the change of both ground and excited state of photo sensitive dyes as solvent molecules interact with the probe molecule in diffe

APA, Harvard, Vancouver, ISO, and other styles

50

Hillman, A. Robert, Karl S. Ryder, Hani K. Ismail, Asuman Unal, and Annelies Voorhaar. "Fundamental aspects of electrochemically controlled wetting of nanoscale composite materials." Faraday Discussions 199 (2017): 75–99. http://dx.doi.org/10.1039/c7fd00060j.

Full text

Abstract:

Electroactive films based on conducting polymers have numerous potential applications, but practical devices frequently require a combination of properties not met by a single component. This has prompted an extension to composite materials, notably those in which particulates are immobilised within a polymer film. Irrespective of the polymer and the intended application, film wetting is important: by various means, it facilitates transport processes – of electronic charge, charge-balancing counter ions (“dopant”) and analyte/reactant molecules – and motion of polymer segments. While film solv

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!