Dissertations / Theses on the topic 'Novel Catalytic System'
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1
Basak, Puja. "Organic transformations using novel catalytic system." Thesis, University of North Bengal, 2022. http://ir.nbu.ac.in/handle/123456789/4790.
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Quanson, Jonathan Luke. "The characterisation of the catalytic activity of human steroid 5α-reductase towards novel C19 substrates." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97057.
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Thesis (MSc)--Stellenbosch University, 2015.ENGLISH ABSTRACT: This study describes: • The UPLC-MS/MS analyses and quantification of novel 5α-reduced steroids using response factors. • The kinetic characterisation of human steroid 5α-reductase type 1 (SRD5A1), expressed in HEK-293 cells, towards 11OHA4 and 11OHT and their keto derivatives by progress curve analysis. • The subcloning, transformation and functional expression of SRD5A1 in the yeast expression system, P. pastoris. • The conversion of 11OHA4 and 11OHT and their keto derivatives by SRD5A1 expressed in P. pastoris. • The endogenous enzymatic activity in P. pastoris towards the 5α-reduced metabolites in the 11OHA4- and alternate 5α-dione pathways. • The potential application of P. pastoris as a biocatalyst in the production of 5α- reduced C19 steroids.
AFRIKAANSE OPSOMMING: Hierdie ondersoek beskryf: • Die UPLC-MS/MS analise en kwantifisering van nuut-ondekte 5α-gereduseerde steroïede met behulp van responsfaktore. • Die kinetiese karakterisering van menslike steroïed 5α-reduktase tipe 1 (SRD5A1), uitgedruk in HEK-293 selle, vir 11OHA4 en 11OHT en hul ketoderivate deur middel van progressiekurwe-analise. • Die subklonering, transformasie en funksionele uitdrukking van SRD5A1 in die gis P. pastoris. • Die omsetting van 11OHA4 en 11OHT en hul ketoderivate deur SRD5A1 uitgedruk in P. pastoris. • Die omsetting van 5α-gereduseerde steroïede in die 11OHA4 en alternatiewe 5α-dioon paaie deur endogene ensieme in P. pastoris • ‘n Ondersoek na die toepassing van die gisuitdrukkingstelsel as ‘n moontlike OR potensiële biokatalis vir die produksie van 5α-gereduseerde C19 steroïede.
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Paterson, Rachel. "A novel two-ligand system for investigation of signal integration by non-catalytic tyrosine-phosphorylated receptors." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:910f605d-3d7e-4a2c-a33a-d380d9702029.
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Appropriate immune responses require integration of a variety of activating, coinhibitory, and co-stimulatory signals from cell surface receptors. One important class of immune receptors are the non-catalytic tyrosine-phosphorylated receptors (NTRs), a group of over 100 receptors, such as PD-1, CTLA-4, CD28, and the T and B cell antigen receptors. These receptors have a number of shared features that we propose have a functional significance, such as relatively small receptor-ligand dimensions and binding of surface-associated ligands. The mechanism through which NTR-ligand engagement leads to signal initiation and integration is not well understood and may offer novel targets for emerging immunotherapies, including checkpoint blockade therapies and adoptive cell transfer approaches such as the use of chimeric antigen receptors. We have developed a generic cellular two-ligand system to investigate signal integration between NTRs by manipulating their extra- and intra-cellular dimensions. We hypothesise that close co-localisation of receptors is important for optimal signal integration and that this requires compatible receptor-ligand dimensions. We also hypothesise that intracellular tail length influences the effectiveness of inhibitory NTRs by determining the âreachâ of the tail and any effector molecules recruited to it. To manipulate the dimensions of receptor-ligand interactions, CHO.K1 cells ("ligand cells") were transfected with SpyTag constructs of different lengths and either CD48- or HLA-A2 single chain dimer-based constructs. SpyTag can be covalently coupled via SpyCatcher to StrepTactin, which binds to NTRs tagged with the short peptide tag Strep-tag II, such as the co-inhibitory receptor PD-1 studied here. Ligand cells expressing HLA-A2 SCD presenting cognate peptide or expressing CD48 can be used to provide activating signals through binding of the 1G4 TCR and a 2B4-CD64 fusion protein respectively, in THP-1 and Jurkat "receptor cells". CD48-based and SCD-based ligand cells were able to activate IL-8 production orupregulation of NF-{deletd} kB-eGFP gMFI by THP-1 receptor cells expressing 2B4-CD64 and Jurkat receptor cells expressing the 1G4 TCR, respectively. This activation of THP-1 and Jurkat receptor cells was partially inhibited by engagement of Strep-tag II-tagged PD-1 with the StrepTactin-based ligand coupled to CHO.K1 ligand cells, demonstrating PD-1-mediated inhibition in the two-ligand system. Experiments testing the study hypotheses have provided promising preliminary results, including that mismatching of receptor-ligand dimensions partially abrogates PD-1-mediated signalling and that the inhibitory function of PD-1 variants of different lengths is dependent on the presence of an immunoreceptor tyrosine-based switch motif (ITSM). Truncation of the PD-1 intracellular tail abolished PD-1-mediated inhibition, even in the presence of an ITSM. There was no evidence that elongation of the intracellular tail affected PD-1 inhibitory function using preliminary experimental conditions, although this result needs to be confirmed using alternative conditions such as lower ligand density. These experiments have provided several insights into areas for further development of the two-ligand system. Optimisation of some aspects of the system, such as improving coupling of the soluble StrepTactin-based ligand, increasing the StrepTactin-Strep-tag II affinity, and incorporating co-stimulatory signalling, should provide a suitable platform for studying signal integration between a wide range of NTRs of interest.
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Lu, Xun. "Exploration of novel carbon(II) and carbon(0) catalyst systems for organic synthesis." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/22939.
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This PhD thesis is focused on the development of novel carbon(II) and carbon(0) catalysis for organic synthesis. More specifically, the major objective has been to explore and design non-toxic and effective catalysts based on: an unusual Bertrand carbene type, a so-called bis(dialkylamino)cyclopropenylidene (BAC), and the carbodicarbene (CDC) framework; the central carbon atom in these molecules is in the formal low-oxidation state ‘+II’ and ‘0’, respectively. These species may be used in base catalysis or as ligands in metal catalysis, and in the context of frustrated Lewis pair (FLP) or dual catalysis. Prior to catalysis studies, the Lewis basicity of such carbon-based compounds has been assessed with 11B NMR analysis using various boron-based Lewis acids. Boron binding has been detected in all cases with a BAC, thereby confirming its strongly nucleophilic character and decreased steric demand. In contrast, only few ate complexes have been identified with CDCs (or precursors thereof), which means that CDCs may be more suitable for FLP catalysis. A preliminary electrophile binding study with a BAC has provided interesting data, based on which unprecedented aldimine Umpolung may be developed in the future. In the context of organocatalysis, BAC-mediated C–C bond formations between various Michael acceptors and N-tosyl imines have been developed (aza-Morita–Baylis–Hillman chemistry). In addition, C–N or C–Hal bond formations between various Michael acceptors and azodicarboxylates or electrophilic halogen reagents have been developed. The characteristic features of these unprecedented BAC catalyses include low catalyst loading, mild reaction conditions, and broad substrate scopes. Importantly, several novel chiral BACs have been synthesized and characterized, and excellent results have been achieved in BAC-catalysed asymmetric aza-MBH reactions (ee up to 97%). To the best of our knowledge, these data represent the first highly enantioselective BAC catalysis; chiral N-heterocyclic carbenes (NHCs) have proved to be substantially less effective in this context (ee up to 38%). In the same line, BAC-catalysed asymmetric borylations and silylations of Michael acceptors have been developed (preliminary ee up to 69%). These results demonstrate the high potential of the newly developed chiral BACs in asymmetric organocatalysis. Meanwhile, several BAC–gallium and BAC–iron complexes have been synthesized and characterized. These novel complexes may be used in Lewis acid catalysis after appropriate activation of the corresponding metal sites. Finally, the exploration of the catalysis potential of various C(0) compounds, namely CDCs, is still under investigation.
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Martinelli, Ada <1993>. "Novel catalytic systems and methidologies for organocatalysis and photocatalysis." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amsdottorato.unibo.it/9777/1/Martinelli_Ada_tesi.pdf.
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The thesis is divided into two main parts. In the first one organocatalysis is briefly introduced. Then, new enantiopure trityl pyrrolidines modified with an ionic tag are described. All the catalysts are tested in the benchmark Michael addition reaction to prove their activity and stereoselectivity.
In the second part, photocatalysis is first introduced. Then, four different research projects are described.
At first, the construction of a hybrid metal-organo-photoredox catalyst is described. The hybrid photocatalysts obtained were employed in the benchmark photoredox alkylation of aldehydes.
Then, the use of visible light and a photocatalytic system for the cyclization of iodoaryl vinyl derivatives to tetrahydroquinoline structures is described. In addition, the reaction can also be performed using flow-chemistry. Finally, a mechanistic proposal based on some mechanistic studies is described.
Third, a new photoredox catalyzed transformation for the synthesis of 2,3-dihydrofurans is reported. Depending on the involved starting materials, different pathways have arisen. A mechanistic proposal based on reported literatures and experimental data is described.
At last, a new photoredox catalyzed transformation for the synthesis of 2-aminofurans is described. Electrophilic radical addition on allenamides and subsequential intramolecular cyclization are exploited. The reaction proceeds under very mild conditions and in 2-aminofurans are obtained in good to high yield. It represents one of the few applications of allenamides in photoredox catalysis. A mechanistic proposal is described. Finally, preliminary investigations on the applicability of the developed transformation under flow chemistry conditions.
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Cubbon, Rachel Jane. "Novel nitrogen-phosphorus ligands for asymmetric catalysis." Thesis, University of Sheffield, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310817.
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Perperi, Evangelia. "A novel continuous homogeneous catalytic process for flourous biphasic systems." Thesis, University College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412909.
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Schettini, Rosaria. "Novel macrocyclic systems in asymmetric phase-transfer catalysis." Doctoral thesis, Universita degli studi di Salerno, 2017. http://hdl.handle.net/10556/2422.
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2014 - 2015In the great realm of organic synthesis, phase-transfer catalysis (PTC) is a well recognized methodology which plays a key role both in industry and academia research. This process involves reactions that take place between reagents which are located in different phases, for example an inorganic water-soluble reagent and a substrate soluble in the organic phase. Considering the well-defined advantages of asymmetric phase-transfer catalysis as a powerful method for organic synthesis, the aim of this research project is to introduce novel macrocycle systems as new and efficient catalysts in this field. First of all, considering the advantages of the easy synthetic process for the preparation of cyclopeptoids, their well-explored complexation properties and the preliminary study on the application as phase-transfer catalysts, the idea is to deeply investigate their use in PTC. The advantages of the solid phase synthesis, such as the easy purification of the intermediates and the modular nature of the products, make cyclopeptoids ideal candidates for the discovery of new catalytic systems, as it is possible to incorporate a wide variety of functionalities inside the backbone of the macrocycle in an expeditious way. As a consequence, a library of peptoid-based chiral macrocycles of different size, decorated with alternating residues of L-Proline and different aromatic side chains, will be prepared and used for enantioselective alkylation reactions. The scope of this project extends also to the investigation of novel chiral calixarenes. However, in this case, the idea is to exploit the ability of calixarenes to form host-guest complexes with alkali cations. The study is also devoted to further explore the potential of crown ethers in new catalytic processes. The second chapter focus first on the synthesis of novel chiral cyclopeptoids and then on their application in asymmetric phase-transfer alkylations, in particular for the enantioselective synthesis of α-amino acids. Afterwards the application of new designed calixarenes for the same alkylation reaction is described. Finally the application of cyclopeptoidic systems in the enantioselective alkylation of 2-aryl-oxazoline-4 carboxylic acid esters is discussed. The third chapter describes the application of crown ethers in phase-transfer processes. For this purpose a diasteroselective methodology for the synthesis of γ-substituted butenolides by a direct vinylogous Mukayama-Michael reaction has been developed. [edited by author]
L’attività di ricerca svolta dalla Dr.ssa Schettini Rosaria ha riguardato la sintesi e l’applicazione di nuovi sistemi macrociclici nella catalisi asimmetrica a trasferimento di fase. In particolare, il progetto di dottorato è stato incentrato sulla sintesi di nuovi sistemi chirali di natura ciclopeptoidica impiegati come catalizzatori nel campo asimmetrico. Nel corso del dottorato nuovi sistemi calixarenici chirali sono stati impiegati nel medesimo campo. L’ultima parte del progetto ha riguardato l’impiego di catalizzatori facilmente reperibili in commercio, gli eteri corna. Essi sono stati impiegati con successo in una reazione altamente diastereoselettiva. Durante il corso di dottorato, la dott.ssa Schettini Rosara ha seguito costantemente le attività didattiche previste nel progetto. [a cura dell'autore]
XIV n.s.
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Hardacre, Christopher. "Surface chemistry and catalysis of novel Pt/CeOâ†2 systems." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282862.
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Al-Harrasi, Wail Saif Salim. "Novel plasma catalytic systems for Fischer-Tropsch reactions : intensified gas-to-liquid fuel production." Thesis, University of Newcastle Upon Tyne, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578549.
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One of the impacts of climate change is the emergence of food, energy and water shortages which can be circumvented through intensified technologies in agriculture, energy and chemical/biological processes. Furthermore, depleting fossil fuel reserves requires the establishment of alternative sustainable energy resources. Biomass based energy and chemicals technology is an important component of sustainable development which can be integrated with food and water generation. However, due to distributed nature of biomass, biomass based energy technology needs to be distributed generation which would benefit from low temperature and pressure operation. Syngas produced from gasification of waste/biomass can be. converted to power or liquid fuel after cleaning. Although process intensification (PI) is still in its infancy, potentially, it is highly suitable for the distributed production of power and liquid fuels. The objective of this study is to develop a syngas-to-liquid fuel conversion process suitable for distributed production using principles of PI through the intensification of Fischer Tropsch Synthesis (FTS). The first approach was by using structured catalysts in monolithic forms for FTS. The second approach was to couple the structured catalyst with non thermal plasma by using dielectric barrier discharge (DBD) in hybrid FTS reactors. A hybrid reactor was designed and fabricated to test this novel catalytic system. Co and Co/Cu catalysts were prepared and characterised using scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction and transmission electron microscopy. The reactor was used in the FTS using H, and CO under various processing conditions (temperature, pressure, Hz/CO molar ratio, gas flowrate and plasma power) and the products were analysed using gas chromatography. It is shown that Co/Cu catalyst in plasma assisted FTS was feasible, converting up to 38% of CO at 90W, 1 bar, Hz/CO= 2, 25ml/min and 25°C. This conversion was obtained at 230°C and 6 bar in conventional FTS. This research showed that DBD in FTS enables running the reaction at room temperature and atmospheric pressure avoiding the risks and costs associated with high pressure processes. It was also shown that plasma affected the activity of the catalysts, preventing it from agglomeration.
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Cooper, Colin S. "An investigation of novel materials for the catalytic ozonation of organic compounds in aqueous systems." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309561.
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Dane, Sarah Barbara Joanne. "Applications and activation of novel ligand systems in oxidation catalysis and Ylide-based organometallics." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708166.
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Black, Elzie Dewayne. "An investigation of a novel phase transfer system - the Omega Phase : the synthesis and [4&2] cycloaddition reactions of chiral 2-phenylpropanthial." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/27308.
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Agada, Otokpa C.-M. "Catalytic efficiency of zerovalent iron compounds as paint driers compared with conventional substances: The use of ferrocene and other iron compounds as driers in autoxidative paint systems at ambient and elevated temperatures." Thesis, University of Bradford, 1985. http://hdl.handle.net/10454/3543.
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Novel paint driers based on iron co-ordination complexes were
investigated for use as stoving finishes in oil-based coatings. Cis
9, cis 12-octadecadienoic acid was employed as a model vehicle because
of its high drying capacity. Iron compounds generally have low
catalytic efficiency at low temperatures which however improve with
rises in temperature.
The catalytic efficiency of some iron compounds was compared
with those of some conventional driers at room temperature; 60 C,
80 C and 1200 C. To make the results comparative, equal weights of
drier (0.05%) metal were employed in one series of experiments. In
another series, a much higher concentration (0.25%) metal based on
the weight of 9,12-octadecadienoic acid was employed.
Equal weights of drier combination(s) and variable drier
weights were examined to determine synergism or antagonism in the
autoxidative systems.
Maximum oxygen absorption, changes in iodine and peroxide
values were monitored to determine a comparative catalytic
performance of the driers at the reaction temperatures used.
The reactivity of iron co-ordination complexes was found to
be influenced by the organic compound with which the iron is chelated.
Zerovalent iron complexes can be employed as high temperature
driers.
For convenience some common names have been used for major chemicals
of importance in this work, e. g.,
Linoleic acid; cis 9, cis 12-octadecadienoic acid.
Ferrocene; dicyclopentadienyl iron.
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Agada, Otokpa Christopher-Marius. "Catalytic efficiency of zerovalent iron compounds as paint driers compared with conventional substances : the use of ferrocene and other iron compounds as driers in autoxidative paint systems at ambient and elevated temperatures." Thesis, University of Bradford, 1985. http://hdl.handle.net/10454/3543.
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Novel paint driers based on iron co-ordination complexes were investigated for use as stoving finishes in oil-based coatings. Cis 9, cis 12-octadecadienoic acid was employed as a model vehicle because of its high drying capacity. Iron compounds generally have low catalytic efficiency at low temperatures which however improve with rises in temperature. The catalytic efficiency of some iron compounds was compared with those of some conventional driers at room temperature; 60 C, 80 C and 1200 C. To make the results comparative, equal weights of drier (0.05%) metal were employed in one series of experiments. In another series, a much higher concentration (0.25%) metal based on the weight of 9,12-octadecadienoic acid was employed. Equal weights of drier combination(s) and variable drier weights were examined to determine synergism or antagonism in the autoxidative systems. Maximum oxygen absorption, changes in iodine and peroxide values were monitored to determine a comparative catalytic performance of the driers at the reaction temperatures used. The reactivity of iron co-ordination complexes was found to be influenced by the organic compound with which the iron is chelated. Zerovalent iron complexes can be employed as high temperature driers. For convenience some common names have been used for major chemicals of importance in this work, e. g., Linoleic acid; cis 9, cis 12-octadecadienoic acid. Ferrocene; dicyclopentadienyl iron.
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Yen-LingYeh and 葉妍伶. "The Development of a Novel Meso-Scale Lean Catalytic Thermophotovoltaic System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/97048818283561461384.
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碩士國立成功大學
航空太空工程學系碩博士班
100
The research is focused on a novel combustor to be used on meso-scale thermophotovoltaic (TPV) devices. In order to overcome problems often encountered in miniature power systems, such as short residence time, heat loss and wall quenching, we propose a novel setup of using platinum as the catalyst as well as the emitter for TPV. It has been pointed out in other research that platinum can emit shorter wavelength at higher temperature than usual, which can be used as the material of an emitter. Moreover, using platinum catalyst can increase combustion temperature by 200°C and theoretically significantly enhance the emission efficiency. The current combustor design consists of a percolated Pt catalyst tube in the TPV combustor to stabilize the flame, enhance combustion and emit high temperature radiation. We used an R type thermocouple and a thermal vedio system (TVS) to measure the tube exit and wall temperature, so that we can identify the flame anchor position and distinguish the brightness. Compared with the backward facing step desigh of a traditional TPV combustor, the proposed percolated hole desigh is proved to have a wider operating range. The proposed combustor is also integrated with the GaSb PV cell, then measure the spectrum and I-V curve. The advantage of the outstanding features of the proposed catalyst TPV combustor is partially verified in the current research and further research in the future is urged.
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Yu, Ya-Han, and 游雅涵. "Part I The Application of Novel Bis-N-heterocyclic Carbene–Pd Catalytic System for Transfer Hydrogenation Reaction of Aldehydes and Ketones Part II The Application of Novel Bis-N-heterocyclic Carbene–Pd Catalytic System for Oxidation Reaction of Aldehydes." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/763z63.
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碩士國立中興大學
化學系所
106
The novel bis-N-heterocyclic carbene salt 27 used in this study was easy to prepare. The bis-NHC–Pd catalytic system derived from the salt 27 with Pd(OAc)2 in situ can catalyze the reaction in the air and the aqueous phase. In this study, the transfer hydrogenation of aldehydes and ketones was performed in the presence of 5.0 mol% of salt 27 and Pd(OAc)2 when potassium formate (4.0 equiv.) was used as the hydrogen source and EtOH or DMF as a solvent at 80 °C. The corresponding primary or secondary alcohols were obtained in good yields. In addition, the aldehydes reacted with alcohols to obtain the corresponding esters when potassium formate (1.2 equiv.) was used in moderate yield. However, the oxidation of aldehydes raised to form the corresponding carboxylic acid in the presence of 1.0 mol% bis-NHC–Pd catalytic system in good yields. It is worth noting that the oxidation of 4-(trifluoromethyl)-benzaldehyde still gave in good yield when the loading of the catalytic system was reduced to 0.001 mol% from 1.0 mol%. The turnover number (TON) is up to 34000 and the turnover frequency (TOF) is 1417 h-1. In this study, the reduction and oxidation of aldehydes can be successfully catalyzed by the bis-NHC–Pd catalytic system at 80 °C. When a polar organic solvent such as dimethylformamide or ethanol is used, the aldehydes can be reduced to alcohols. The aldehydes can be oxided to carboxylic acid when water is used as the solvent. In addition, these catalytic reactions are completely operated in air. The aldehydes or ketones containing various functional groups, such as olefins, halogen, methoxy, cyano, ketones, are tolerated in the presence of bis-NHC–Pd catalytic system. The oxidations of aldehydes occur at mild temperature and can be carried out with 0.01 mol% loading of the bis-NHC–Pd catalytic system, even on a gram scale. The generality of these methodologies gives it operational simplicity and the potential for use on an industrial scale.
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Lai, Yong-Long, and 賴永隆. "Investigation of Novel Low Temperature Atmospheric Pressure Plasma System for Deposition Photo-catalytic TiO2 Thin Film and Light-emitting ZnO Thin Film/Nanorods." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/95980137714097913302.
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碩士義守大學
材料科學與工程學系碩士班
95
In the conventional low-pressure plasma process, operating gas pressure usually ranges from 1 mTorr to several Torr. If the processing plasma can be generated under atmospheric pressure and included the complicated shape application, it could be used for reducing the material processing cost and wider industries. Therefore, low temperature atmospheric plasma system which contains priorities of low cost, high throughput, more environmental protection, easy installation, widely used in various geometrical substrates, in-line process capabilities, acceptable to treat substrates of large areas and various geometrical shapes, and maintaining the reasonable material characteristics have become to be the promising candidate system of next generation for replacing low-pressure plasma or wet chemical process in the future. The purpose of this work is to develop a novel low temperature atmospheric pressure (AP) plasma system and use the system to deposit photo-catalytic TiO2 thin film and ZnO nanorods. In this study, we used titanium isopropoxide (TIP) and 2M Zn(NO3)2 aqueous solutions as precursors for TiO2 thin film and ZnO nanorods, respectively. The precursor was vaporized by ultrasonic oscillator, and moisture of precursor was introduced into plasma reaction quartz tube by argon carrier gas. The main plasma working gas is argon mixed with O2. At the same time, the optimum results indicated the parameters of the AP plasma system are the TIP precursors flow rate/oxygen flow rate of 20 sccm/200 sccm for TiO2 thin film at 500℃ and the Zn(NO3)2 precursors flow rate/oxygen flow rate of 70 sccm/37 sccm for ZnO nanorods at 300℃, respectively. The relationship between material and optical characteristics of titanium oxide (TiO2) photo-catalytic films and zinc oxide (ZnO) films mixed with nano-rods structures were analyzed in this study. It is found that titanium oxide films possessed more columnar structure and larger specific surface area would result in better photo-catalytic characteristics. However, it is revealed that zinc oxide films had higher nano-rods density would lead to more visible light emission.
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Machado, Bruno Alexandre Fernandes Ribeiro. "Novel catalytic systems for the selective hydrogenation of a,B-unsaturated aldehydes." Doctoral thesis, 2008. http://hdl.handle.net/10216/13471.
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Machado, Bruno Alexandre Fernandes Ribeiro. "Novel catalytic systems for the selective hydrogenation of a,B-unsaturated aldehydes." Tese, 2008. http://hdl.handle.net/10216/13471.
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Bahutski, Viktar. "Development of Viable Synthetic Approaches to Highly Functionalized Small Ring Systems - Synthesis of Novel Cyclopropylacrylates as Monomers for Low-Shrinkage Polymer-Composites." Doctoral thesis, 2004. http://hdl.handle.net/11858/00-1735-0000-0006-B0A8-E.
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