Academic literature on the topic 'Mn-catalyzed'
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Journal articles on the topic "Mn-catalyzed"
WHELAN, GENE, and RONALD C. SIMS. "Mn-Catalyzed Oxidation of Naphthalenediol." Hazardous Waste and Hazardous Materials 12, no. 4 (January 1995): 381–94. http://dx.doi.org/10.1089/hwm.1995.12.381.
Full textNishikori, Hisashi, and Tsutomu Katsuki. "Mn-salen catalyzed enantioselective sulfimidation." Applied Catalysis A: General 194-195 (March 2000): 475–77. http://dx.doi.org/10.1016/s0926-860x(99)00393-2.
Full textChen, Yuanjin, Tian Tian, and Zhiping Li. "Mn-Catalyzed azidation–peroxidation of alkenes." Organic Chemistry Frontiers 6, no. 5 (2019): 632–36. http://dx.doi.org/10.1039/c8qo01231h.
Full textCozzi, P. "Mn-Catalyzed Reformatsky Reaction with Ketones." Synfacts 2006, no. 7 (June 2006): 0698. http://dx.doi.org/10.1055/s-2006-941862.
Full textFu, Niankai, Yifan Shen, Anthony R. Allen, Lu Song, Atsushi Ozaki, and Song Lin. "Mn-Catalyzed Electrochemical Chloroalkylation of Alkenes." ACS Catalysis 9, no. 1 (December 5, 2018): 746–54. http://dx.doi.org/10.1021/acscatal.8b03209.
Full textRehman, S., M. Hafeez, U. Manzoor, M. A. Khan, and A. S. Bhatti. "Competitive role of Mn diffusion with growth in Mn catalyzed nanostructures." Journal of Applied Physics 111, no. 8 (April 15, 2012): 084301. http://dx.doi.org/10.1063/1.3702881.
Full textOsipova, Elena S., Ekaterina S. Gulyaeva, Nikolay V. Kireev, Sergey A. Kovalenko, Christian Bijani, Yves Canac, Dmitry A. Valyaev, Oleg A. Filippov, Natalia V. Belkova, and Elena S. Shubina. "Fac-to-mer isomerization triggers hydride transfer from Mn(i) complex fac-[(dppm)Mn(CO)3H]." Chemical Communications 58, no. 32 (2022): 5017–20. http://dx.doi.org/10.1039/d2cc00999d.
Full textSchmidt and Husted. "The Biochemical Properties of Manganese in Plants." Plants 8, no. 10 (September 27, 2019): 381. http://dx.doi.org/10.3390/plants8100381.
Full textZhang, Liang, Shuya Liu, Zhiguo Zhao, Hongmei Su, Jingcheng Hao, and Yao Wang. "(Salen)Mn(iii)-catalyzed chemoselective acylazidation of olefins." Chemical Science 9, no. 28 (2018): 6085–90. http://dx.doi.org/10.1039/c8sc01882k.
Full textWang, Congyang, and Ting Liu. "Manganese-Catalyzed C(sp2)–H Addition to Polar Unsaturated Bonds." Synlett 32, no. 13 (March 27, 2021): 1323–29. http://dx.doi.org/10.1055/a-1468-6136.
Full textDissertations / Theses on the topic "Mn-catalyzed"
Pietikäinen, Pekka. "Mn-salen catalyzed asymmetric epoxidation : search for new oxidation systems." Helsinki : University of Helsinki, 2001. http://ethesis.helsinki.fi/julkaisut/mat/kemia/vk/pietikainen/.
Full textCui, Yu. "Delignification of Kraft-AQ Southern Pine Pulp with Hydrogen Peroxide Catalyzed by Mn(IV)2-Me4DTNE." NCSU, 2000. http://www.lib.ncsu.edu/theses/available/etd-20000203-202106.
Full textOver the years, hydrogen peroxide has been used to improve the brightness of pulp at the end of a bleaching sequence. However, the degree of delignification achieved by a hydrogen peroxide stage is usually modest. That is because in alkaline condition the hydroperoxy anion reacts with chromophores in pulp as a nucleophile that does not oxidize residual lignin to a significant extent. In order to enhance the reactivity of hydrogen peroxide as an oxidant, a binuclear manganese complex Mn(IV)2-Me4DTNE was added. As a result, the degree of delignification was significantly improved, while at the same time, the strength properties of the pulp were better preserved compared traditional in hydrogen peroxide delignification. In order to better understand the mechanism of this delignification process, lignin model compound oxidation and kinetics of pulp delignification were studied. In addition, residual lignin was isolated from the pulp before and after delignification and then characterized by GPC, FTIR, and 1H-13C 2D NMR. Shown by the model compound study, hydrogen peroxide is able to oxidize 1-(3,4-dimethoxyphenyl)ethanol, E-diphenylethene, and 1-(3,4-dimethoxyphenyl)-1-propene to a considerable extent when catalyzed by Mn(IV)2-Me4DTNE, indicating that the reactivity of hydrogen peroxide as an oxidant is significantly improved. Indeed, as shown by the kinetic study of pulp delignification, the degree of delignification as well as the rate of delignification were greatly improved when the catalyst was applied. In addition, the catalyzed delignification process benefits from the concerted reaction mechanism that regulates the formation of hydroxyl radicals responsible for the severe damage to the fibers. As a result, the strength properties were well preserved. Shown by the characterization of residual lignin before and after the delignification, residual lignin was oxidized to a good extent which accounts for the significant degree of delignification. The process simulation of this catalyzed delignification process by WinGEMS4.0 showed that this process was profitable if the cost of the catalyst was kept below $330/kg.
Jabeen, Fauzia. "III-V semiconducting nanowires by molecular beam epitaxy." Doctoral thesis, Università degli studi di Trieste, 2009. http://hdl.handle.net/10077/3097.
Full textThis thesis is devoted to the study of the growth of III-V nanowires (NWs) by catalyst assisted and catalyst free molecular beam epitaxy (MBE). The nanostructures have been routinely characterized by scanning electron microscopy (SEM) and, to a minor extent by transmission electron microscopy (TEM). X-ray photoemission spectroscopy (XPS), scanning photoemission microscopy (SPEM), extended X-ray absrorption fi ne structure analysis (EXAFS), photoluminescence (PL) and trans- port measurements have given an important contribution on specifi c topics. The first section of this thesis reports on GaAs, InAs, and InGaAs NWs growth by Au assisted MBE. A substrate treatment is proposed that improves uniformity in the NWS morphology. Thanks to a careful statistical analysis of the NWs shape and dimensions as a function of growth temperature and duration, evidence is found of radial growth of the NWs taking place together with the axial growth at the tip. This eff ect is interpreted in term of temperature dependent diff usion length of the cations on the NWs lateral surface. The control of the NWs radial growth allowed to grow core shell InGaAs/GaAs NWs, displaying superior optical quality. A new procedure is proposed to protect NWs surface from air exposure. This procedure allowed to perform ex-situ SPEM studies of electronic properties of the NWs. The second part of this thesis is devoted to Au-free NWs growth. GaAs and InAs NWs were successfully grown for the first time using Mn as catalyst. Incorporation of Mn in the NW is studied using EXAFS technique. It is shown that Mn atoms are incorporated in the body of GaAs NWs. Use of low growth temperature is suggested in order to improve the Mn incorporation inside GaAs NWs and obtain NWs with magnetic properties. Finally, growth of GaAs and InAs NWs on cleaved Si subtrate is demonstrated without the use of any outside metal catalyst. Two kinds of nanowires have been obtained. The experimental findings suggest that the two types of nanowires grow after di fferent growth processes.
Questa tesi e' dedicata allo studio della crescita di nanofili di semiconduttori III- V tramite epitassia da fasci molecolari (MBE) assistita da catalizzatore e senza l'uso di catalizzatori. Le nanostrutture sono state caratterizzate sistematicamente tramite microscopia elettronica a scansione (SEM), e in maniera minore microscopia elettronica in trasmissione (TEM). Altre tecniche come la spettroscopia di fotoemissione da raggi x (XPS), la microscopia da fotoemissione in scansione (SPEM), la spettroscopia di assorbimento x (in particolare la extended X-ray absorpition fine structure analysis (EXAFS)) la fotoluminescenza (PL), e il trasporto elettrico hanno dato importanti contributi su problematiche specifiche. La prima parte di questa tesi riguarda la crescita di nanofili di GaAs, InAs e InGaAs tramite MBE assistita da oro. Viene proposto un trattamento del substrato che migliora nettamente l'omogeneita' morfologica dei nanofili. Grazie ad un'attenta analisi statistica della forma e delle dimensioni dei nanofili in funzione della temperatura e del tempo di crescita e' stata dimostrata la crescita radiale dei nanofili, che avviene insieme alla crescita assiale che ha luogo alla punta del nanofilo. Le osservazioni sperimentali sono state interpretate in termini di dipendenza dalla temperatura della lunghezza di diffusione dei cationi sulle super ci laterali dei nanofili. Il controllo della crescita radiale ha permesso di crescere nanofili di InGaAs/GaAs core shell, costituiti cioe' da una anima centrale di InGaAs (core) e uno strato esterno di GaAs (shell) , che hanno dimostrato eccellente qualita' ottica. Viene quindi proposta una nuova procedura per proteggere la super ficie dei nanofili durante l'esposizione all'aria. Grazie a questa e' stato possibile realizzare ex-situ uno studio SPEM delle proprieta' elettroniche dei nanofili. La seconda parte della tesi riguarda la crescita di nanofili senza l'uso di oro. Viene per la prima volta dimostrata la possibilita' di crescere nanofili di GaAs e InAs usando il manganese come catalizzatore. L'incorporazione del Mn come impurezza nei nanofili e' stata studiata tramite EXAFS. Le misure hanno dimostrato che atomi di Mn sono effettivamente incorporate nel corpo dei nano fili. La crescita delle nanostrutture a temperatura piu' bassa potrebbe migliorare qualitativamente l'incorporazione del Mn e permettere la crescita di nanofili con proprieta' magnetiche. Viene in fine dimostrata la crescita di nanofili di GaAs e di InAs senza l'utilizzo di materiali diversi da quelli costituenti il semiconduttore. Tale risultato e' ottenuto su superfici sfaldate di silicio. Sono state osservate nanostrutture di due tipi, che sulla base dei dati sperimentali sembrano essere dovuti a due diversi meccanismi di crescita.
XXI Ciclo
1977
Dewhirst, William Scott. "Mn(II) oxidation by HOCl in the presence of iron oxides : a catalyzing effect /." Thesis, This resource online, 1997. http://scholar.lib.vt.edu/theses/available/etd-08252008-162202/.
Full textWu, Pei-Jou, and 伍珮瑈. "Synthesis and Analysis of Mn-catalyzed Silicon Nanowires." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/t7b5a3.
Full text國立交通大學
電子物理系所
106
In this research, we studied the growth of silicon nanowires (SiNWs) with manganese (Mn) as catalyst by UHV-CVD. We explored the influence of the different growth parameters on the morphology and growth structure of the nanowires. In the process of tuning growth parameters, we found that the metal thickness directly affected the diameter of nanowire, and the precursor gas pressure immediately related to the growth rate of nanowires. We also showed that the growth temperature and initial condition of catalyst particle are key parameters for controlling structure morphology and growth orientation. We successfully achieved to control the growth of uniform nanowires along <111> direction during VSS growth. Therefore, we developed a novel process to fabricate different morphologies of Si nanostructure, denoted as wire, inclined and vertical. Further, we in-depth discussed these growth mechanisms in this investigation. Furthermore, we proved the single crystal of Si 1D structure during VSS growth, meanwhile the phases in the metal catalyst are confirmed as solid as s single-crystalline of tetragonal Mn4Si7 structure. Then we analyzed detailed epitaxial relations at the interfaces between the catalyst and silicon nanowire. On the other hand, the results showed that the obtained SiNWs were cone-like shape, which have the superior antireflective property characterized by UV–VIS-NIR.
Hau-YuFang and 方浩羽. "Nickel-Catalyzed Cyclodimerization:Synthesis and Application of Annelated Dibenzo[de,mn]naphthacene derivatives." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/754jdw.
Full text國立成功大學
化學系碩博士班
101
Dibenzo[de,mn]naphthacene annelated derivatives has been generated by nickel-catalyzed cyclodimerization. These structure which has been comfirmed by X-ray single-crystal diffraction analysis is non-planar and twist angle about 43.8-66.6o. The bond length and bond alternation in the crystal structures and HOMA theoretical calculations reveal that the central two six-membered rings lack aromaticity. Systematic studies of reaction conditions reveal that nickel-catalyst, the amount of zinc powder, slovent and temperature all play key roles in this reaction. The reaction conditions have been optimized. Upon heating 1-bromo-(phenylethynyl)acene with mixture of NiBr2(dppe) and zinc powder in 1,4-dioxane at temperature between 130 to 150 ℃ for 14 hours, we generated 6 kinds of Dibenzo[de,mn]naphthacene annelated derivatives, the isolated yield is between 30% to 69%. These Dibenzo[de,mn]naphthacene annelated derivatives show similar perfermoce in oxidation-reduction potential as most PAHs compounds show. In optical physical properties, the maximum absorption wavelenth of these compound is between 551 nm to 647nm, which shows small HOMO-LUMO energy gap(1.81-2.12 eV).
Chia-HuaChen and 陳家華. "Palladium-Catalyzed Cyclodimerization of 1-ethynyl-8-iodonaphthalenes: Synthesis of Dibenzo[de,mn]naphthacenes." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/39769201263241440938.
Full text國立成功大學
化學系碩博士班
98
7,14-diphenyldibenzo[de,mn]naphthacene (zethrene, 24a) has been generated by the Pd-catalyzed cyclodimerization which used silver carbonate, Ag2CO3, and tris(furan-2-yl)phosphine, P(2-furyl)3 as cocatalyst. This structure which has been comfirmed by X-ray single-crystal diffraction analysis is non-planar and its twist angle about 43 o. The bond length and bond alternation in the crystal structures reveal that the central two six-membered rings lack aromaticity. Systematic studies of the reaction conditions reveal that palladium catalyst, the amount of silver, reactivity of phosphine and solvent all play key roles. The reaction conditions have been optimized. Upon heating 1-iodo-8-(phenylethynyl)naphthalene (23a) in o-xylene at 130 oC about 36 hours with mixture of palladium(Ⅱ??acetate, Pd(OAc)2, silver carbonate and tris(furan-2-yl)phosphine can be obtained 73% yield. We have generated about 13 zethrene derivatives in this method and the yield from 18–73%. According to the yield, when the aryl-substitutent on terminal alkynes are donating characters or larger substituent, the yield is low; verse visa, when the aryl-substituent on terminal alkynes are withdrawing characters or small substitutent, the yield is better.
Lin, Ying-Huo, and 林景和. "Abiotic transformation of pyrogallol, amino acid, and glucose-6-phosphate as catalyzed by Fe and Mn oxides." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/45770371309839378617.
Full textHsu, Wei-Ti, and 徐維悌. "Oscillating and Kinetic study of Bromate-Ethyl Hydrogen Malonate Reaction Catalyzed by Ce(III),Mn(II) and Ferriin." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/64930447860387947042.
Full text國立成功大學
化學系
84
The Ce(III), Mn(II) or Fe(phen)32+ -catalyzed redox reaction of bromate ionwith 1M aqueous sulfuric acid exhibits oscillating behavior in the concentrationof bromide as well as metal ion. The induction period is shortened by the presence of bromomalonic acid under the catalysis by Ce(III) or Mn(II) ion whereas it is not shortened under the catalysis by Fe(phen)32+ ion.The induction period is about 1 hour under the catalysis of Ce(III) or Mn(II)and no induction period exists under the catalysis of Fe(phen)32+ ion.The kinetics of the oxidation of EHM by Ce(IV), Mn(II), or Fe(phen)33+ in 1M aqueous sulfuric acid were studied by using[the spectrophotometric method . In general, the rate law can be described as-d[M(n+1)+]/dt=k2 [EHM][M(n+1)+]/(Km+[EHM])( M(n+1)+ = Ce(IV), Mn(III) or Fe( phen)33+ )The order of relative reactivity toward oxidizing EHM is Mn(II) > Ce(IV) >Fe(phen)33+ under aerobic condition and Mn( II) = Ce(IV) > Fe(phen)33+ under anaerobic condition.
Tsai, Reay-Fun, and 蔡瑞芳. "Kinetic study of the reaction to the Ce(III),Mn(II),Ferriin- catalyzed Bromate-2-ketoglutaric Acid Oscillating Reaction." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/17732684418279400981.
Full text國立成功大學
化學系
84
Abstract The Ce(III),Mn(II) or Fe( phen)3+3 -catalyzed redox reaction ofbromate ion with 2-ketoglutaric Acid (KGA) in 1M aqueous sulfuric acid exhibits oscillating behavior in the concentration of bromide ions.The induction period approaches zero and its oscillating behavior seems like the Belousov-Zhabotinsky(BZ) oscillating reaction with Pyruvic Acid (PyA). The kinetics of the Ce(IV),Mn(III), or Fe(phen)3+3 ion oxidation of 2-ketoglutaric Acid was studied by using the spectrophotometric method and the stopped flow technique.Under similar conditions,the order of relative rate is Mn(III)-KGA >Ce(IV)-KGA >Fe(phen)3+3-KGAreactions. The rate law of Mn(III)-oxidation of KGA can be described as -d[Mn(III)]/dt=k2'[KGA][Mn(III)]/Km+[KGA] at 25C,the value of k2' for Mn(III)-KGA is 0.196 s-1. The rate law of Ce(IV) and Fe(phen)3+3 -oxidation of KGA can be described as -d[M(n+1)]/dt=k2[KGA][M(n+1)] ( M(n+1)=Ce(IV) or Fe( phen)3+3) The second order rate constant at 25C for the Ce( IV)-KGA and Fe(phen)3+3 -KGA reactions are 6.01 M-1s-1 and 0.218 M-1s-1. The results have valuable implications for understanding the mechanistic details of the BZ oscillating reactions of keto Acids.
Book chapters on the topic "Mn-catalyzed"
Campestrini, S., and F. Novello. "Olefin Epoxidation by PH4PHSO5 Catalyzed by Mn(III)-Porphyrins Under Homogeneous Conditions." In The Activation of Dioxygen and Homogeneous Catalytic Oxidation, 452. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-3000-8_43.
Full text"Active Species and Mechanisms of Non-Heme Fe- and Mn-Catalyzed Oxidations." In Environmentally Sustainable Catalytic Asymmetric Oxidations, 134–45. CRC Press, 2014. http://dx.doi.org/10.1201/b17422-11.
Full textHalligudi, S. B., D. Chatterjee, D. B. Shukla, and R. S. Somani. "Homologation of methanol catalyzed by Mn(salen)Cl2 complex encapsulated in zeolite-Y." In Recent Advances In Basic and Applied Aspects of Industrial Catalysis, Proceedings of 13th National Symposium and Silver Jubilee Symposium of Catalysis of India, 841–43. Elsevier, 1998. http://dx.doi.org/10.1016/s0167-2991(98)80368-6.
Full textCuret-Arana, María C., Randall Q. Snurr, and Linda J. Broadbelt. "Quantum Chemical Analysis of the Reaction Pathway for Styrene Epoxidation Catalyzed by Mn-Porphyrins." In Mechanisms in Homogeneous and Heterogeneous Epoxidation Catalysis, 471–86. Elsevier, 2008. http://dx.doi.org/10.1016/b978-0-444-53188-9.00019-5.
Full textTaber, Douglass F. "Substituted Benzenes: The Kirsch Synthesis of Cybrodol." In Organic Synthesis. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199965724.003.0063.
Full textTaber, Douglass. "Transition Metal-Mediated Ring Construction: The Yu Synthesis of 1-Desoxyhypnophilin." In Organic Synthesis. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199764549.003.0075.
Full textTaber, Douglass F. "Metal-Mediated C–C Ring Construction: The Ding Synthesis of (−)-Indoxamycin B." In Organic Synthesis. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190646165.003.0075.
Full textKündig, E. P., and S. H. Pache. "Palladium-Catalyzed Reactions." In Compounds of Groups 7-3 (Mn..., Cr..., V..., Ti..., Sc..., La..., Ac...), 1. Georg Thieme Verlag KG, 2003. http://dx.doi.org/10.1055/sos-sd-002-00240.
Full textKündig, E. P., and S. H. Pache. "Via Palladium-Catalyzed Reactions." In Compounds of Groups 7-3 (Mn..., Cr..., V..., Ti..., Sc..., La..., Ac...), 1. Georg Thieme Verlag KG, 2003. http://dx.doi.org/10.1055/sos-sd-002-00227.
Full textDissanayake, P., D. J. Averill, and M. J. Allen. "Lanthanide-Catalyzed Mukaiyama Aldol Reactions." In Compounds of Groups 7-3 (Mn..., Cr..., V..., Ti..., Sc..., La..., Ac...), 1. Georg Thieme Verlag KG, 2011. http://dx.doi.org/10.1055/sos-sd-102-00094.
Full textConference papers on the topic "Mn-catalyzed"
Martelli, F., S. Rubini, M. Piccin, G. Bais, F. Jabeen, S. De Franceschi, V. Grillo, et al. "Fabrication And Characterization Of Mn-catalyzed GaAs Nanowires." In PHYSICS OF SEMICONDUCTORS: 28th International Conference on the Physics of Semiconductors - ICPS 2006. AIP, 2007. http://dx.doi.org/10.1063/1.2729769.
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