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Solution combustion synthesis - YouTube

A solution synthesis of crystalline Ge nanoparticles (nc-Ge) is reported. The metathesis reaction of NaGe with excess GeCl4 in glyme solvents produces nc-Ge. Metathesis reactions between KGe and excess GeCl4 or GeCl2:(dioxane) in glyme and Mg2Ge and excess GeCl4 in diglyme and triglyme were also investigated. The surface of these nanoparticles is terminated with alkyl groups by reaction with alkyl Li and Grignard reagents. The alkyl-terminated crystalline Ge nanoparticles (R̂-nc-Ge) were characterized by Fourier transform infrared spectroscopy, high-resolution transmission electron microscopy, powder X-ray diffraction, UV-vis absorption spectroscopy, photoluminescence, and photoluminescence excitation spectroscopy. The optical properties of R̂-nc-Ge made by this method agree with predictions from quantum confinement models.

N2 - A solution synthesis of crystalline Ge nanoparticles (nc-Ge) is reported. The metathesis reaction of NaGe with excess GeCl4 in glyme solvents produces nc-Ge. Metathesis reactions between KGe and excess GeCl4 or GeCl2:(dioxane) in glyme and Mg2Ge and excess GeCl4 in diglyme and triglyme were also investigated. The surface of these nanoparticles is terminated with alkyl groups by reaction with alkyl Li and Grignard reagents. The alkyl-terminated crystalline Ge nanoparticles (R̂-nc-Ge) were characterized by Fourier transform infrared spectroscopy, high-resolution transmission electron microscopy, powder X-ray diffraction, UV-vis absorption spectroscopy, photoluminescence, and photoluminescence excitation spectroscopy. The optical properties of R̂-nc-Ge made by this method agree with predictions from quantum confinement models.

T1 - Shape-controlled solution-synthesis of single crystalline ZnTe 1D nanocrystals

Combinatorial Synthesis in Solution Phase

19/7/2008 · Solution combustion synthesis Velaga Srihari

T1 - Synthesis and solution-phase conformation of the RG-I fragment of the plant polysaccharide pectin reveals a modification-modulated assembly mechanism

The syntheses of pure RG-I fragments of key plant matrix biomolecule pectin using a counterintuitive late-stage convergent cis-glycosylation has allowed detailed analyses of their solution-phase conformations, metal binding affinities, pKa values, self-assembly equilibria, and diffusional kinetics. These reveal a striking, right-handed 31-helix that provides an effective and repeating lateral display of putative liganding carboxylates. Moreover, these heteropolymeric structures allow units as short as tetrasaccharides to self-assemble through carbohydrate-carbohydrate interactions that are induced by the presence of Ca(II), a known dynamic trigger in planta. These self-assembly properties can be switched simply by the addition or removal of a single methyl group in this repeating unit through methyl (de)esterification, another known dynamic trigger in planta. Together, the combined effect of Ca(II) and methylation revealed here suggests a concerted molecular basis for these two major dynamic modifications in planta.

Parallel Solution Phase Synthesis - Combinatorial …

N2 - The syntheses of pure RG-I fragments of key plant matrix biomolecule pectin using a counterintuitive late-stage convergent cis-glycosylation has allowed detailed analyses of their solution-phase conformations, metal binding affinities, pKa values, self-assembly equilibria, and diffusional kinetics. These reveal a striking, right-handed 31-helix that provides an effective and repeating lateral display of putative liganding carboxylates. Moreover, these heteropolymeric structures allow units as short as tetrasaccharides to self-assemble through carbohydrate-carbohydrate interactions that are induced by the presence of Ca(II), a known dynamic trigger in planta. These self-assembly properties can be switched simply by the addition or removal of a single methyl group in this repeating unit through methyl (de)esterification, another known dynamic trigger in planta. Together, the combined effect of Ca(II) and methylation revealed here suggests a concerted molecular basis for these two major dynamic modifications in planta.

Free Online Library: Solution chemical synthesis of nanostructured thermoelectric materials

After 160 hours have passed since the start of the electrolysis, the process is finished. The electrolyte is filtered a few times with the help of a medicinal gauze, in order to filter out larger unwanted particles. After that, the electrolyte was further filtered through cotton wool placed in a bottleneck (of a larger two-liter bottle) that was cut off. Gradually, by repetitive filtration, a yellow colored clear solution was obtained. Since the filtration was progressing at a very slow rate, I took a smaller amount of the already filtered solution, and the rest of the solution was slowly filtered for a few more hours. In the filtered solution, along with sodium chlorate, there was also some sodium hypochlorite. Because of that, the solution was heated until the boiling point was reached, and was kept at that temperature for about 15 minutes. Thanks to this step, all the sodium hypochlorite converted to more sodium chlorate (which is also the basis of the hypochlorite method of chlorate synthesis). After heating for 15 minutes, I checked the pH of the solution, and added a bit of sodium hydroxide solution so that the pH would get close to 8. If one assumes that all the NaCl passed into NaClO3, that would mean that from the starting 350 grams of sodium chloride, one could get around 627 grams of sodium chlorate, which is only possible in theory (the yield of this type of homemade cells is mostly around 50%). Although the yield of the process was surely much less than 100%, I calculated the amount of needed potassium chloride for the reaction of the ion exchange by taking into account the theoretical yield of 100%. That way, I was sure that all of the sodium chlorate passed into potassium chlorate. However, some of the potassium chloride remained unused (which is not a problem because thanks to its high solubility, it remains in the solution and doesn't cause problems when extracting potassium chlorate).

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Parallel Solution Phase Synthesis


Low-Temperature Solution Synthesis of Few-Layer ..

A special paragraph will be dedicated to the problems caused by peptide aggregation in the course of the synthesis. This phenomenon is a major cause of trouble as it is difficult to predict, is sequence dependent and no universal solution has been found up to now.

Rebek Synthesis | Hydrogen | Solution - Scribd

As for the power source, I used a power supply from an old computer, which was modified in order to give an alternating current of the desired value of electric current. For the formation of one mole of chlorate ions, six moles of electrons are needed. The total charge of one mole of electrons, i.e. the Avogadro's number of electrons is equal to one farad (which is equal to 96485.3415 coulombs). Since 1 Ah = 3600 C, and by taking into account the fact that 6 moles of electrons are needed, I calculated that for the synthesis of one mole of sodium chlorate, 160.8 Ah are needed. Since the cells are in a series circuit, and by using the electric current of 3 A, I calculated that the time needed to convert one mole of NaCl to one mol of NaClO3 equals 26.8 hours. In each electrolytic cell there was 500 mL of the saturated NaCl solution, so in total, I was dealing with about 350 grams of NaCl, i.e. about 5.9 moles. Finally, the conclusion is that the reaction should be in progress for 158.12 hours in order to convert all the NaCl into NaClO3. As for the voltage, around 3 volts are needed for the oxidation of the chloride to the chlorate ion (and for the reduction of hydrogen on the cathode), but I used a bit higher voltage (9 V) because of the electrical resistance of the cells themselves.

Solution phase synthesis of CuO nanorods - [PDF …

AB - A solution synthesis of crystalline Ge nanoparticles (nc-Ge) is reported. The metathesis reaction of NaGe with excess GeCl4 in glyme solvents produces nc-Ge. Metathesis reactions between KGe and excess GeCl4 or GeCl2:(dioxane) in glyme and Mg2Ge and excess GeCl4 in diglyme and triglyme were also investigated. The surface of these nanoparticles is terminated with alkyl groups by reaction with alkyl Li and Grignard reagents. The alkyl-terminated crystalline Ge nanoparticles (R̂-nc-Ge) were characterized by Fourier transform infrared spectroscopy, high-resolution transmission electron microscopy, powder X-ray diffraction, UV-vis absorption spectroscopy, photoluminescence, and photoluminescence excitation spectroscopy. The optical properties of R̂-nc-Ge made by this method agree with predictions from quantum confinement models.

On the Methodology of Solution Synthesis - EconBiz

This method of potassium chlorate synthesis is used in the industry for the mass production of the mentioned compound. The process is based on the electrolysis of an aqueous solution of sodium chloride. The product of this reaction is sodium chlorate. After that, via the process of ion exchange between potassium chloride and sodium chlorate, one can obtain potassium chlorate, and sodium chloride. This step is also used in the thermal decomposition method. As an electrolyte, one can also use solutions of other metallic chlorides (for example, barium or potassium chloride). However, using sodium chloride has its advantages - for example, the product (sodium chlorate) is much more soluble in water than barium or potassium chlorate. Because of that, after the reaction of electrolysis is finished, the product is completely dissolved, and that makes filtration of the electrolyte easier, because by filtration one can remove all impurities without removing some of the desired product as well. As I already mentioned, later one can use the obtained sodium chlorate to make potassium chlorate (or barium chlorate, which is also important in pyrotechnics) via a simple ion exchange reaction. Although this method is used in the mass production of the mentioned compounds, it can also be used to make smaller amounts of these products.

A Social Intranet for Architecture and Engineering …

AB - The syntheses of pure RG-I fragments of key plant matrix biomolecule pectin using a counterintuitive late-stage convergent cis-glycosylation has allowed detailed analyses of their solution-phase conformations, metal binding affinities, pKa values, self-assembly equilibria, and diffusional kinetics. These reveal a striking, right-handed 31-helix that provides an effective and repeating lateral display of putative liganding carboxylates. Moreover, these heteropolymeric structures allow units as short as tetrasaccharides to self-assemble through carbohydrate-carbohydrate interactions that are induced by the presence of Ca(II), a known dynamic trigger in planta. These self-assembly properties can be switched simply by the addition or removal of a single methyl group in this repeating unit through methyl (de)esterification, another known dynamic trigger in planta. Together, the combined effect of Ca(II) and methylation revealed here suggests a concerted molecular basis for these two major dynamic modifications in planta.

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