Relevant bibliographies by topics / Radical clock

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  2. Dissertations / Theses
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  5. Conference papers

Academic literature on the topic 'Radical clock'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Radical clock"

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Nevill, S. M., and J. A. Pincock. "The design of radical clocks to probe the reactivity of the intermediates in arylmethyl ester photochemistry." Canadian Journal of Chemistry 75, no. 2 (1997): 232–47. http://dx.doi.org/10.1139/v97-027.

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The photochemistry in methanol of the esters 1–6was examined. These reactions normally proceed through radical pairs that result from homolytic cleavage of the carbon–oxygen bond in the excited singlet state. Each of the esters was designed to probe the intervention and reactivity of the substituted arylmethyl radical by incorporating a potential radical clock at the carbon of the reactive bond. For esters 1–5, the products isolated indicated that the radical clock was not reactive enough to compete with the very rapid alternate processes of the radical pair, namely, electron transfer to form
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Mai-Linde, Yasemin, and Torsten Linker. "Radical Clock Probes to Determine Carbohydrate Radical Stabilities." Organic Letters 22, no. 4 (2020): 1525–29. http://dx.doi.org/10.1021/acs.orglett.0c00111.

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Kunka, Cheryl P. A., and John Warkentin. "Facile 5-endo ring closures to the azo group. A free radical synthesis of indazoles." Canadian Journal of Chemistry 68, no. 4 (1990): 575–80. http://dx.doi.org/10.1139/v90-088.

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Five 1-alkyl-3-methylindazoles were prepared by treatment of 1-(2-bromophenyl)-1-methoxy-1-(2-alkylazo)ethanes with tri-n-butyl stannane and AIBN at 80 °C in benzene. Yields in the radical cyclization step ranged from 39 to 92%. 1-Phenyl-3-methylindazole was prepared by an analogous route but in very poor yield (<5%). Rate constants for the 5-endo radical closures [Formula: see text], estimated by the radical clock method, were 5.2 × 109 s−1 and 9.2 × 108 s−1 for two of the alkyl systems. Rate constants for analogous 5-endo cyclizations of aryl radicals onto C—C double bonds are much smalle
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Buckmelter, Alexandre J., Angie I. Kim, and Scott D. Rychnovsky. "Conformational Memory in Enantioselective Radical Reductions and a New Radical Clock Reaction." Journal of the American Chemical Society 122, no. 39 (2000): 9386–90. http://dx.doi.org/10.1021/ja002068k.

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He, Xiang, та Paul R. Ortiz de Montellano. "α- and β-Thujone Radical Rearrangements and Isomerizations. A New Radical Clock". Journal of Organic Chemistry 69, № 17 (2004): 5684–89. http://dx.doi.org/10.1021/jo0493267.

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Hollis, R., L. Hughes, V. W. Bowry, and K. U. Ingold. "Calibration of a fast benzylic radical clock reaction." Journal of Organic Chemistry 57, no. 15 (1992): 4284–87. http://dx.doi.org/10.1021/jo00041a040.

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Wang, Wenbo, Haotian Lu, Mengsi Zhang, et al. "Synthesis of maleimide-based enediynes with cyclopropane moieties for enhanced cytotoxicity under normoxic and hypoxic conditions." Journal of Materials Chemistry B 9, no. 22 (2021): 4502–9. http://dx.doi.org/10.1039/d1tb00142f.

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Maleimide-based enediynes with cyclopropane moieties show enhanced radical character by taking advantage of radical clock reactions. They are highly effecient antitumor agents under both normoxic and hypoxic conditions.
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Jewell, Deborah Rae, Lukose Mathew, and John Warkentin. "Rate constant for chlorine abstraction from CCl4 by the 5-hexenyl radical." Canadian Journal of Chemistry 65, no. 2 (1987): 311–15. http://dx.doi.org/10.1139/v87-052.

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Cyclization of the 5-hexenyl free radical to the cyclopentylmethyl free radical was used to clock chlorine atom abstraction by 5-hexenyl from carbon tetrachloride in solution. The source of 5-hexenyl radicals was 5-hexenyl[1-hydroxy-1-methyl-ethyl]diazene ((CH3)2C(OH)N=N(CH2)4CH=CH2), which decomposes thermally in CCl4 by a radical chain mechanism to afford chloroform, acetone, nitrogen, 6-chloro-1-hexene, cyclopentylchloromethane, 1-hexene, and methylcyclopentane as primary products. 6-Chloro-1-hexene is converted, in part, to a secondary product, 1,1,1,3,7-pentachloroheptane, by radical chai
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Lu, Qingyi, and William C. Agosta. "A radical clock reaction in the photochemistry of an acylpyrazine." Tetrahedron Letters 37, no. 48 (1996): 8629–32. http://dx.doi.org/10.1016/s0040-4039(96)02023-0.

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Bowry, V., J. Lusztyk, and K. U. Ingold. "Calibration of very fast alkyl radical 'clock' rearrangements using nitroxides." Pure and Applied Chemistry 62, no. 2 (1990): 213–16. http://dx.doi.org/10.1351/pac199062020213.

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Dissertations / Theses on the topic "Radical clock"

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Rowell, Simon C. "Mechanism and promotion of Sandmeyer chemistry." Thesis, University of York, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387548.

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Chen, Gaojian. "Surface modification with polymers using living radical polymerisation and click chemistry." Thesis, University of Warwick, 2007. http://wrap.warwick.ac.uk/4462/.

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Thin organic and polymer layers on solid substrates play a key role in many processes aimed at modifying surface properties. Both "grafting to" and "grafting from" methods have been used in this project to modify a variety of surfaces including cellulose, resins and carbon nanotubes (CNT) with functional polymers. Living radical polymerisation and Huisgen [2+3] cycloaddition (often termed "click" reaction) were used to carry out these modifications. Living radical polymerisation was first used to synthesize different α-functional polymers and used for surface modification. For example, Living
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Geng, Jin. "Synthesis of glycopolymers and glycoproteins by combination of living radical polymerisation and 'click' chemistry." Thesis, University of Warwick, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487813.

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Amato, Douglas Vincent. "LATENT CYSTEINE RESIDUES FROM POLYMERS PREPARED VIA FREE AND CONTROLLED RADICAL POLYMERIZATIONS." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/972.

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One less commonly used “click” reaction is thiazolidine chemistry. Thiazolidine chemistry is a commonly used reaction used in biological systems because the reaction requires the presence of both cysteine (a common amino acid) and an aldehyde or ketone. If cysteine residues could be incorporated into a polymer then a variety of applications could be developed. Polymers containing free thiols (aka thiomers) have developed in the last decade to become great mucoadhesives. If there was a facile route to control the amount of free thiols along the polymer then more fine-tuned and potentially stron
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Lang, Andreas [Verfasser], and Mukundan [Akademischer Betreuer] Thelakkat. "Semiconductor Polymer Architectures using Click Chemistry and Controlled Radical Polymerization / Andreas Lang. Betreuer: Mukundan Thelakkat." Bayreuth : Universitätsbibliothek Bayreuth, 2011. http://d-nb.info/101923458X/34.

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Li, Guang-Zhao. "Synthesis and application of some novel functional polymers via controlled radical polymerization and click chemistry." Thesis, University of Warwick, 2012. http://wrap.warwick.ac.uk/54118/.

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The objective of this thesis was to prepare thermoresponsive PEG-based homopolymers and copolymers by combination of cobalt-mediated catalytic chain-transfer polymerization (CCTP) and thiol-ene “click” chemistry and prepare well-defined glycopolymers via “living” polymerization and “click” chemistry. The effect of different catalysts for the nucleophilic mediated thiol-ene reaction was investigated using model compounds, both monomers and oligomers obtained by CCTP. Different catalysts, including pentylamine and hexylamine (primary amines), triethylamine (tertiary amine), and two different pho
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Langlais, Marvin. "Des xanthates aux γ-thiolactones fonctionnelles : synthèse et applications à l'ingénierie macromoléculaire". Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30172.

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L'accès à de nouvelles techniques de synthèse simples permettant l'obtention d'architectures macromoléculaires complexes et bien définies demeure un enjeu permanent. Les réactions de couplage dites " click " permettent de relever en parti ce défi et dans cette catégorie, les γ-thiolactones sont apparues comme un nouvel outil important. Dans ce contexte, nous avons développé un nouveau procédé de synthèse de mono- et bis(γ-thiolactones) fonctionnelles basé sur la chimie radicalaire des xanthates, permettant l'accès à une bibliothèque de thiolactones porteuses de groupements fonctionnels divers.
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Maleki, Laleh. "Synthesis of AcGGM Polysaccharide Hydrogels." Doctoral thesis, KTH, Polymerteknologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-195091.

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Lignocellulosic biomass is believed to serve a prominent role in tomorrow’s sustainable energy and material development. Among the polysaccharide fractions of lignocellulosic biomass, the potential of hemicelluloses as a valuable material resource is increasingly recognized. Thanks to their hydrophilic structure, hemicelluloses are suitable substrates for hydrogel design. The work summarized in this thesis aims to develop feasible strategies for the conversion of O-acetyl galactoglucomannan (AcGGM), an ample hemicellulose in softwood, into hydrogels. Within this framework, four synthetic pathw
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Wang, Miao. "Nouveaux polycondensats greffés à perméabilité contrôlée : application à la purification d'un biocarburant par un procédé de séparation membranaire." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0205/document.

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Ce travail a consisté en la synthèse et la caractérisation de nouveaux polycondensats poly(urée-imide)s (PUIs) greffés par une réaction de chimie "click" avec des nombres de greffons variables. Deux familles de matériaux ont été obtenues à partir d'un même PUI et de greffons de structures différentes mais de mêmes masses molaires : poly(méthoxy (diéthylène glycol) méthacrylate) (PMDEGMA) synthétisé par polymérisation radicalaire par transfert d’atome (ATRP) ; poly(hydroxyéthyl acrylate) (PHEA) préparé par Single Electron Transfer Living Radical Polymerization (SET-LRP). Ces matériaux ont ensui
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Zarafshani, Zoya. "Chain-end functionalization and modification of polymers using modular chemical reactions." Phd thesis, Universität Potsdam, 2012. http://opus.kobv.de/ubp/volltexte/2012/5972/.

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Taking advantage of ATRP and using functionalized initiators, different functionalities were introduced in both α and ω chain-ends of synthetic polymers. These functionalized polymers could then go through modular synthetic pathways such as click cycloaddition (copper-catalyzed or copper-free) or amidation to couple synthetic polymers to other synthetic polymers, biomolecules or silica monoliths. Using this general strategy and designing these co/polymers so that they are thermoresponsive, yet bioinert and biocompatible with adjustable cloud point values (as it is the case in the present the
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Books on the topic "Radical clock"

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Stock, Catherine McNicol. Rural Radicals. Cornell University Press, 2018. http://dx.doi.org/10.7591/cornell/9781501714030.001.0001.

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This book originally appeared in the wake of the bombing of the Murrah Federal Building in Oklahoma City on April 19, 1995. Written for a general audience, it asks where these “angry, white, rural men” came from and how their movements and grievances both stayed the same and changed over time. Timothy McVeigh and Terry Nichols acted in a long line of rural protesters on the left and the right—including the nineteenth century Populists--- who crusaded against big government, big business, and big banks. At the same time, and with little sense of contradiction, rural people also used violence to
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Book chapters on the topic "Radical clock"

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Franz, J. A., J. C. Linehan, and M. S. Alnajjar. "Hydrogen Atom Abstraction from a Molybdenum Hydride: Radical Clock Studies." In Organic Free Radicals. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73963-7_32.

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Dondoni, Alessandro, and Alberto Marra. "Free-Radical Thiol-Ene and Thiol-Yne Couplings as Click Processes for Glycoconjugation." In Click Chemistry in Glycoscience. John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118526996.ch3.

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Vacher, B., A. Samat, and M. Chanon. "α-Halosulfones Reduction Mechanism: Application of Highly Efficient Radical Clocks." In Organic Free Radicals. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73963-7_12.

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Spruell, Jason M. "Highly Stable TTF Radical Dimers in a Five-State [3]Catenane." In The Power of Click Chemistry for Molecular Machines and Surface Patterning. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9647-3_7.

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Saikia, Bhaskar Jyoti, Dhaneswar Das, Pronob Gogoi, and Swapan Kumar Dolui. "Designing Self-Healing Polymers by Atom Transfer Radical Polymerization and Click Chemistry." In Industrial Applications for Intelligent Polymers and Coatings. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26893-4_13.

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Sumerlin, Brent S., Nicolay V. Tsarevsky, Haifeng Gao, et al. "Click Functionalization of Well-Defined Copolymers Prepared by Atom Transfer Radical Polymerization." In ACS Symposium Series. American Chemical Society, 2006. http://dx.doi.org/10.1021/bk-2006-0944.ch011.

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Cai, Tao, Koon-Gee Neoh, and En-Tang Kang. "Surface-Functionalized and Surface-Functionalizable Poly(vinylidene fluoride) Membranes via Controlled/Living Radical Polymerization and Click Chemistry." In ACS Symposium Series. American Chemical Society, 2012. http://dx.doi.org/10.1021/bk-2012-1101.ch014.

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Imran-ul-haq, Muhammad, Nadja Förster, Radovan Vukicevic, Kristin Herrmann, Rebekka Siegmann, and Sabine Beuermann. "Iodine Transfer Radical Polymerizations of Vinylidene Fluoride in Supercritical Carbon Dioxide and Polymer Functionalization via Click Chemistry." In ACS Symposium Series. American Chemical Society, 2009. http://dx.doi.org/10.1021/bk-2009-1024.ch015.

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Johnston, Kenneth R. "Radical in a Lamb’s Cloak." In Unusual Suspects. Oxford University Press, 2013. http://dx.doi.org/10.1093/acprof:oso/9780199657803.003.0016.

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"4. Functional (co)polymers via a combination of reversible deactivation radical polymerization techniques and thiol-based “click”/conjugation chemistries." In Reversible Deactivation Radical Polymerization. De Gruyter, 2019. http://dx.doi.org/10.1515/9783110643695-004.

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Conference papers on the topic "Radical clock"

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Kaur, Inderjit, Swarupa Mitra, Manoj Kumar Sharma, et al. "Case report of vaginal melanoma." In 16th Annual International Conference RGCON. Thieme Medical and Scientific Publishers Private Ltd., 2016. http://dx.doi.org/10.1055/s-0039-1685371.

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Primary malignant melanoma of vagina is a rare disease with a predilection for local recurrence, distant metastasis and short survival time. Due to the low incidence and lack of reporting in the literature, treatment choices still remain controversial. We describe 2 cases of vaginal malignant melanoma. A 42 yr old female presented with complaints of post coital and per vaginal bleed of 1 month duration. Examination findings show growth 6 cm x 6 cm on anterior vaginal wall, another 3 x 3 cm lesion on right lateral vaginal wall. Vaginal biopsy showed malignant melanoma, S-100 and HMB-45 positive
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Kaur, Inderjit. "Case report of vaginal melanoma." In 16th Annual International Conference RGCON. Thieme Medical and Scientific Publishers Private Ltd., 2016. http://dx.doi.org/10.1055/s-0039-1685370.

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Primary malignant melanoma of vagina is a rare disease with a predilection for local recurrence, distant metastasis and short survival time. Due to the low incidence and lack of reporting in the literature, treatment choices still remain controversial. We describe 2 cases of vaginal malignant melanoma. A 42 yr old female presented with complaints of post coital and per vaginal bleed of 1 month duration. Examination findings shows growth 6 cm x 6 cm on anterior vaginal wall, another 3 x 3 cm lesion on right lateral vagianl wall. Vaginal biopsy showed malignant melanoma, S-100 and HMB-45 positiv
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Ströhle, Stefan, Zoran Jovanovic, Andreas Haselbacher, and Aldo Steinfeld. "One-Dimensional Heat and Mass Transfer and Discrete Granule Model of a Tubular Packed-Bed Reactor for Thermochemical Storage of Solar Energy." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17301.

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Thermochemical storage of high-temperature (450°C – 1000°C) thermal energy can be applied to concentrated solar power systems for round-the-clock electricity dispatchability. Reversible, non-catalytic gas-solid reactions are used to convert thermal into chemical energy during endothermic charging, and vice versa during exothermic discharging. To assist the experimental investigation of such chemical reactors, a numerical model of the heat and mass transfer in a tubular packed bed reactor has been developed. The fluid serves as both heat transfer medium and gas reactant supplier and is modeled
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Li, Jianhua, Lee Xie, Feng Xie, and Ganquan Xie. "The 0 to R1 cylinder radial coordinate transformation can not be used to induce cylinder layer EM invisible cloak and acoustic no scattering cloak." In 2017 Progress in Electromagnetics Research Symposium - Fall (PIERS - FALL). IEEE, 2017. http://dx.doi.org/10.1109/piers-fall.2017.8293324.

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Li, Jianhua, Lee Xie, Feng Xie, and Ganquan Xie. "The 0 to R1 spherical radial transformation can not be used to induce acoustic no scattering cloak but some can be for EM invisible cloak." In 2017 Progress in Electromagnetics Research Symposium - Fall (PIERS - FALL). IEEE, 2017. http://dx.doi.org/10.1109/piers-fall.2017.8293310.

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Schlüter, Dominik, Robert P. Grewe, Fabian Wartzek, et al. "Reduced-Order Modelling of Rotating Stall." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14459.

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Abstract Rotating stall is a non-axisymmetric disturbance in axial compressors arising at operating conditions beyond the stability limit of a stage. Although well-known, its driving mechanisms determining the number of stall cells and their rotational speed are still marginally understood. Numerical studies applying full-wheel 3D unsteady RANS calculations require weeks per operating point. This paper quantifies the capability of a more feasible quasi-2D approach to reproduce 3D rotating stall and related sensitivities. The first part of the paper deals with the validation of a numerical base
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