نتایج جستجو برای: P-toluene sulfonic acid

تعداد نتایج: 1930135  

Journal: :iranian chemical communication 2015
fariba heidarizadeh saeed asadipour

polypyrrole is one of the most useful conductive polymers, but green synthesis of this polymer has been restricted until now. the objective of the present paper is green synthesis of nano polypyrrole (ppy) by oxidative polymerization using urea-hydrogen peroxide. it was found that conductivity and morphology of polypyrrole are highly dependent on the reaction conditions such as the molar ratio ...

Journal: :Science and Technology of Advanced Materials 2015

2015
Shaista Andleeb Arun Kumar Singh Jonghwa Eom

We report the tailoring of the electrical properties of mechanically exfoliated multilayer (ML) molybdenum disulfide (MoS2) by chemical doping. Electrical charge transport and Raman spectroscopy measurements revealed that the p-toluene sulfonic acid (PTSA) imposes n-doping in ML MoS2. The shift of threshold voltage for ML MoS2 transistor was analyzed as a function of reaction time. The threshol...

Journal: :Clinical chemistry 1955
B J JONES F B MORELAND

HAVE BEEN USING the method of Pearson, Stern, and McGavack (1) for the determination of cholesterol for some time. It has proved to be a convenient and accurate procedure and the reaction had always gone smoothly. One day recently, however, the tubes were set up for the determination as usual, using a freshly prepared solution of p-toluenesulfonic acid. Solutions made from the same bottle of so...

2015
Raina Boyle Guy Crundwell Neil M. Glagovich

The title compound, C20H18N2S, was synthesized by the condensation reaction between p-tolu-idine and thio-phene-2,5-dicarboxaldehye in refluxing toluene with p-toluene-sulfonic acid added as catalyst. The mol-ecule lies on a twofold rotation axis and adopts an E orientation with respect to the azomethine bonds. The dihedral angle between the unqiue benzene ring and the least-squares plane [maxi...

Journal: :Organic & biomolecular chemistry 2006
Shu-Jiang Tu Bo Jiang Jun-Yong Zhang Run-Hong Jia Yan Zhang Chang-Sheng Yao

Reactions of aldehydes, 1,3-indanedione and enaminones were successfully carried out using p-toluene sulfonic acid (p-TsOH) as a catalyst and high-temperature water as a solvent under microwave irradiation. This method provided several advantages such as rapid reaction times, high yields, and a simple workup procedure. In addition, a possible mechanism to account for the reaction was proposed.

Alireza Foroumadi, Pegah Nouraie Shahram Moradi Dehaghi

In this paper, the synthesis of various enaminones from the reaction of 3-aminocoumarin and ethyl-2,4-dioxo-4-arylbutanoate in the presence of p-toluene sulfonic acid is reported. The reaction was examined under different solvents and catalytic systems, which clearly proved the importance of acidic catalyst in this organic transformation. This work was also accompanied by density functional the...

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