625-74-1Relevant articles and documents
Photocatalytic degradation of imidacloprid by phosphotungstic acid supported on a mesoporous sieve MCM-41
Feng, Changgen,Li, Yanzhou,Liu, Xia
experimental part, p. 127 - 132 (2012/03/09)
Solid catalysts consisting of polyoxometalates (POM) namely phosphotungstic acid H3PW12O40 (HPW) supported on a mesoporous sieve MCM-41 have been prepared and characterized by FT-IR, X-ray diffraction, nitrogen adsorption and high resolution transmission electron microscope (HRTEM). The HPW/MCM-41 with different HPW loadings from 10 to 60 wt% possess large specific surface area and rather uniform mesopores. Keggin structure of HPW retains on the prepared composite catalysts. The photocatalytic performance of HPW/MCM-41 was examined by degradation of a durable pesticide imidacloprid. It is found that the prepared photocatalysts exhibit high activity under irradiation of 365 nm monochromatic light. For 50 mL of imidacloprid (10 mg/L), conversion of imidacloprid using 20 mg of HPW/MCM-41 with 50 wt% loading level and calcined at 300°C reaches 58.0% after 5 h irradiation. Copyright
M+-SN1 AND M+-SN2 REACTIONS OF PRIMARY ALKYL IODIDES IN AQUEOUS SOLUTIONS OF THE NITRITE COMPLEXES OF SILVER
Zamashchikov, V. V.,Rudakov, E. S.,Bezbozhnaya, T. V.,Matveev, A. A.
, p. 424 - 429 (2007/10/02)
In the AgNO3-NaNO3-NaNO2-H2O system alkyl iodides RI are converted into nitroalkanes and alcohols.The formation of alcohols with a rearranged structure was used as a test for the M+-SN1 mechanism of hydrolysis, and the increase in the accumulation rate of RNO2 with increase in the concentration of NO2- and silver complexes was used as a test for the M+-SN2 mechanism of substitution of iodide by a nitrite ion.It was established that the rate constants vary in the order CH3I +-SN1 paths and CH3I (CH3)2CHCH2I >> (CH3)3CCH2I for the M+-SN2 paths.
