Relevant bibliographies by topics / Carbonato de Guanidina

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Carbonato de Guanidina'

Author: Grafiati
Published: 4 June 2025
Last updated: 15 July 2025

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Journal articles on the topic "Carbonato de Guanidina"

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Carolina, Pfaff, González Douglas, Brito Joaquín, Gómez Luisana, and Díaz Yraida. "Síntesis y evaluación HDS de nitruros mixtos de níquel y vanadio usando carbonato de guanidina como acomplejante." Catálisis 8 (January 1, 2019): 19–23. https://doi.org/10.5281/zenodo.4016376.

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Se sintetizaron nitruros de vanadio y níquel, a partir de Complejos Metal-Orgánicos por la interacción con carbonato de guanidina ([C(NH2)3]2CO3) por el método de Reacción a Temperatura Programada empleando 100mL/min de amoniaco o nitrógeno a 500750°C; y posteriormente pasivados a temperatura ambiente con una mezcla oxígeno/argón (1% molar).  Se caracterizaron por: Difracción de Rayos X, Análisis Químico Elemental, Microscopía Electrónica de Barrido y Área Específica, evidenciando
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Carolina, Pfaff, González Douglas, Rico Emily, Brito Joaquín, and Díaz Yraida. "Preparación y evaluación catalítica en hidrodesulfuración de nitruros mixtos de cobalto y vanadio usando carbonato de guanidina como acomplejante." Catálisis 8 (January 1, 2019): 15–18. https://doi.org/10.5281/zenodo.4016362.

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Se sintetizaron nitruros de vanadio y cobalto, a partir de Complejos Metal-Orgánicos por la interacción con carbonato de guanidina ([C(NH2)3]2CO3) por el método de Reacción a Temperatura Programada empleando 100mL/min de amoniaco o nitrógeno a 500-800°C; y posteriormente pasivados a temperatura ambiente con una mezcla oxígeno/argón (1% molar).  Se caracterizaron por: Difracción de Rayos X, Análisis Químico Elemental, Microscopía Electrónica de Barrido y Área Específica, evidenciando forma
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Tiritiris, Ioannis, Jochen Mezger, Edmont V. Stoyanov та Willi Kantlehner. "Orthoamide und Iminiumsalze, LXXI [1]. Zur Fixierung von Kohlendioxid mit organischen Basen (Teil 2) – Reaktionen von Guanidinen und ω-Aminoalkyl-guanidinen mit Kohlendioxid/ Orthoamides and IminiumSalts, LXXI [1]. Capturing of Carbon Dioxidewith OrganicBases (Part 2) – Reactions of Guanidines and ω-Aminoalkyl-guanidines with Carbon Dioxide". Zeitschrift für Naturforschung B 66, № 4 (2011): 407–18. http://dx.doi.org/10.1515/znb-2011-0411.

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The guanidines 1, 4, 6, 8, 10, and 12 react with carbon dioxide in the presence of traces of water to give the guanidinium hydrogen carbonates 3, 5, 7, 9, 11, and 13. The crystal structures of the salts reveal the presence of centrosymmetric hydrogen carbonate ion dimers, which are connected by O-H・ ・ ・O hydrogen bonds. Additionally the cations are associated with the anions via N-H・ ・ ・O hydrogen bonds. The reaction of the N-(aminoalkyl)guanidine 14 with CO2 in the presence of traces of water affords a stable hygroscopic carbamic acid as the hydrogen carbonate salt 15. In the crystal structur
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Mihara, Masatoshi, Kaname Moroga, Tetsuo Iwasawa, et al. "Selective Synthesis of Carbonates from Glycerol, CO2, and Alkyl Halides Using tert-Butyltetramethylguanidine." Synlett 29, no. 13 (2018): 1759–64. http://dx.doi.org/10.1055/s-0037-1610027.

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Herein, we describe the guanidine-promoted synthesis of carbonates from glycerol, CO2, and alkyl halides. Specifically, a linear tricarbonate (1,2,3-tri-O-butoxycarbonylglycerol), a dicarbonate [butyl (2-oxo-1,3-dioxolan-4-yl)methyl carbonate] containing a linear and a cyclic moiety, and a cyclic monocarbonate (4-hydroxymethyl-2-oxo-1,3-dioxolan) were selectively obtained in good yields, which were strongly affected by the steric bulkiness of the guanidine group substituents. The developed method exhibits the advantages of high efficiency and mild conditions, thus being a powerful tool for the
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Dai, Qiu Ju, and Ming Gao. "Thermal Degradation of Hemp Treated with Guanidine Carbonate." Advanced Materials Research 705 (June 2013): 106–9. http://dx.doi.org/10.4028/www.scientific.net/amr.705.106.

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Hemp was treated with guanidine carbonate to impart flame retardance. The thermal degradation of the samples were studied by thermogravimetry (TG) and differential thermal analysis (DTA). The flame retardance was determined by LOI. Morphology of the char structure was studied by SEM to obtain information concerning the thermal degradation mechanism. For hemp treated with guanidine carbonate, which has higher LOI and char yield values, the oxidative decomposition stages include a decomposition stage at lower temperatures (172-210°C) , leading to more carbonaceous residue and small amount of fla
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Shi, Tujin, Junfang Zhao, PY Iris Shek, Alan C. Hopkinson, and KW Michael Siu. "Carbonate, carbamate, urea, and guanidine as model species for functional groups in biological molecules — A combined density functional theory and mass spectrometry examination of polysodiation and gas-phase dissociation." Canadian Journal of Chemistry 83, no. 11 (2005): 1941–52. http://dx.doi.org/10.1139/v05-204.

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Electrospray mass spectrometric analyses of carbonate, carbamate, urea, and guanidine in the presence of sodium ions results in polysodiated complexes of the type, [M – (n – 1)H + nNa]+, where M is the species analyzed and n = 2 and (or) 3. These complexes are unusual in their high sodium contents and their attractive structures. The [M – H + 2Na]+ complexes fragment to produce [Na2NH2]+, Na+, and a product ion resulting from the loss of NH3. The [M – 2H + 3Na]+ complexes dissociate to give a number of fragment ions, including [Na3O]+, [Na2OH]+, [NaOCNNa]+, [Na2NH2]+, [Na3CN2]+, and Na+, depen
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Shang, Yuhan, Mai Zheng, Haibo Zhang, and Xiaohai Zhou. "The Guanidine-Promoted Direct Synthesis of Open-Chained Carbonates." Australian Journal of Chemistry 72, no. 12 (2019): 933. http://dx.doi.org/10.1071/ch18623.

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In order to reduce CO2 accumulation in the atmosphere, chemical fixation methodologies were developed and proved to be promising. In general, CO2 was turned into cyclic carbonates by cycloaddition with epoxides. However, the cyclic carbonates need to be converted into open-chained carbonates by transesterification for industrial usage, which results in wasted energy and materials. Herein, we report a process catalyzed by tetramethylguanidine (TMG) to afford linear carbonates directly. This process is greener and shows potential for industrial applications.
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Wang, Xingxing, Peng Zhang, Penglei Cui, Weiguo Cheng, and Suojiang Zhang. "Glycerol carbonate synthesis from glycerol and dimethyl carbonate using guanidine ionic liquids." Chinese Journal of Chemical Engineering 25, no. 9 (2017): 1182–86. http://dx.doi.org/10.1016/j.cjche.2017.06.025.

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Sivakumar, Reajean, Julien Kwiatoszynski, Amaury Fouret, et al. "Enantiomer-Specific Oriented Attachment of Guanidine Carbonate Crystals." Crystal Growth & Design 16, no. 7 (2016): 3573–76. http://dx.doi.org/10.1021/acs.cgd.6b00547.

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Xu, Yaohui, Liangjuan Gao, Jinyuan Yang, Qingxiu Yang, Wanxin Peng, and Zhao Ding. "Effective and Efficient Porous CeO2 Adsorbent for Acid Orange 7 Adsorption." Materials 16, no. 7 (2023): 2650. http://dx.doi.org/10.3390/ma16072650.

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A porous CeO2 was synthesized following the addition of guanidine carbonate to a Ce3+ aqueous solution, the subsequent addition of hydrogen peroxide and a final hydrothermal treatment. The optimal experimental parameters for the synthesis of porous CeO2, including the amounts of guanidine carbonate and hydrogen peroxide and the hydrothermal conditions, were determined by taking the adsorption efficiency of acid orange 7 (AO7) dye as the evaluation. A template−free hydrothermal strategy could avoid the use of soft or hard templates and the subsequent tedious procedures of eliminating templates,
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Dissertations / Theses on the topic "Carbonato de Guanidina"

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Cota, Iuliana. "New basic catalysts for fine chemicals synthesis." Doctoral thesis, Universitat Rovira i Virgili, 2010. http://hdl.handle.net/10803/8591.

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En los últimos años, existe un creciente interés en la sustitución de viejas tecnologías por alternativas catalíticas más limpias para el desarrollo de procesos respetuosos con el medio ambiente para la industria química. De esta manera, es un desafío continuo encontrar nuevos catalizadores básicos capaces de realizar, con alta actividad y selectividad, las reacciones para la síntesis de productos de alto valor añadido tanto químicos como farmacéuticos. La investigación descrita en esta Tesis se ha centrado en el estudio de nuevos protocolos de síntesis para catalizadores básicos. Nuevos mater
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Book chapters on the topic "Carbonato de Guanidina"

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Bährle-Rapp, Marina. "Guanidine Carbonate." In Springer Lexikon Kosmetik und Körperpflege. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_4515.

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Andrade, Caio César, Graziela Pereira dos Santos, Elisa Guimarães Barbosa, and Maísa Borges Costa. "USO DE REATOR DE MICRO-ONDAS PARA GUANILAÇÃO DE TIOUREIAS." In Química Orgânica: Conceitos, Fundamentos e Avanços. Editora Científica Digital, 2024. http://dx.doi.org/10.37885/240115500.

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Com o crescimento abrangente de novos fármacos, os compostos nitrogenados que possuem grupos funcionais guanidínicos, ocupam bastante espaço devido ao seu amplo espectro de atividades biológicas e farmacológicas. Em nosso grupo de pesquisa (LaBSIMCO), a aplicação de tioureias para à síntese de guanidinas e seus derivados sintéticos, é um dos alvos que norteiam nossas pesquisas científicas. Neste contexto, a síntese de guanidinas funcionalizadas, apesar de bastante descrita na literatura, objetivou este trabalho, a partir do estudo e aplicação de nova metodologia sintética com vislumbre para o desenvolvimento de reações “mais limpas” e que direcionassem para a aplicação da química verde. Principalmente, por não empregar agentes tiofílicos (que em sua grande maioria são metais com alto grau de toxicidade), como são descritos na literatura, para a obtenção de guanidinas. Nesta nova proposta de metodologia empregou-se o iodo molecular com agente tiofílico por apresentar baixa toxicidade e a água como solvente sem o uso de metal. Os produtos obtidos foram caracterizados por análise espectroscópica de Ressonância Magnética Nuclear (RMN) de Hidrogênio 1H e Carbono 13C (uni e bidimensionais). As reações na qual foram empregadas o iodo foram promovidas sob refluxo a 80ºC e a reação com a água em banho ultrassônico por 48 horas, onde a reação utilizou iodo molecular como agente de dessulfurização apresentou um rendimento de 20,88% e com a água 23,36%. Este trabalho teve como objetivo, aplicar duas novas metodologias de síntese para o desenvolvimento desta substancia voltada a química verde. Porém com os resultados obtidos, constatou-se que a metodologia com iodo molecular como agente guanilante, sem a presença de metais pesados, apresentou maior rendimento, mas que as reações ainda necessitam de algumas adaptações para obter melhores rendimentos.
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Conference papers on the topic "Carbonato de Guanidina"

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Kouril, Milan, Tomas Lovasi, Sarka Msallamova, and Jan Stoulil. "Electrochemical Injection of Corrosion Inhibitors and Chloride Extraction for Protection of Steel Reinforcement." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-13451.

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Abstract Electrochemical chloride extraction from a reinforced concrete structure may be accompanied with an electrochemical injection of healing agents if such agents are positively charged and are able migrate towards the activated reinforcement. Positive charge carrying nanoparticles or cationic corrosion inhibitors might be the proper choice. Organic substances with a positive charge and their salts are mostly such inhibitors. Critical concentration of chlorides was investigated for fresh and carbonated concrete pore solution. Corrosion inhibition efficiency was evaluated by means of polar
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Journal articles
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