Sorption of acetanilide herbicides, metolachlor, acetochlor, pretilachlor and butachlor on eight soils with various physical and chemical properties was studied. The adsorption isotherms could fit Freundich equation w...Sorption of acetanilide herbicides, metolachlor, acetochlor, pretilachlor and butachlor on eight soils with various physical and chemical properties was studied. The adsorption isotherms could fit Freundich equation well (r 2 ≥0.91) and the adsorption extents increased in the order: metolachlor < acetochlor < pratilachlor < butachlor. The product of Freundlich adsorption constants, Kf (1/n), showed to have a good correlation with organic matter content (OM) of soils for each of these herbicides, suggesting that OM is the primary factor dominating in the adsorption process of these asetanilide herbicides. Multivariant correlation regression between Kf (1/n) and two factors, water solubility (S.) of herbicides and OM, was also performed. Kf(1/n) correlated with 1/S. and OM/S. well, showing that high S. corresponds to a weak tendency to adsorb on soils. Infrared (IR) spectra and electron spin resonance (ESR) parameters confirmed that multifunctional H-bonds and charge-transfer bonds were the main adsorption mechanisms of these acetanilide herbicides. The abilities of herbicides to form these adsorption bonds with HA increased in the same order as the extent of adsorption.展开更多
N-[4-（2-Methoxyphenoxy）]phenyl acetanilide has been synthesized and its structure was determined by X-ray diffraction analysis with a = 0.6152（4）, b = 1.1728（4）, c = 1.2367（4） nm, α = 91.34（3）, β = 93.22（...N-[4-（2-Methoxyphenoxy）]phenyl acetanilide has been synthesized and its structure was determined by X-ray diffraction analysis with a = 0.6152（4）, b = 1.1728（4）, c = 1.2367（4） nm, α = 91.34（3）, β = 93.22（4）, γ = 102.61（3）°, V = 0.8688（7） nm3 and Dc = 1.274 Mg/m3. Theoretical investigations on the title compound were carried out by full optimization on its structural unit at the B3LYP/6-31G＊＊ level. And ultimately, the infrared, Raman spectra, electronic absorption spectra, and the relationships between temperature and thermodynamic functions （Hm, Sin, Cpm） were obtained.展开更多
he initiation mechanism of ceric ion/2-benzoyl acetanilide system was studiedby means of FT-IR, EPR and kinetic studies which revealed that 2-benzoyl ac-etanilide acts as a very active promotor to the polymerization i...he initiation mechanism of ceric ion/2-benzoyl acetanilide system was studiedby means of FT-IR, EPR and kinetic studies which revealed that 2-benzoyl ac-etanilide acts as a very active promotor to the polymerization initiated by ceric ion.The initiation mechanism was then proposed which involved the complex formationbetween a ceric ion and a l ,3-diketone group or a carbamate group, followed by,thedecomposition of the complex to generate C-centered secondary alkyl radical and N-centered anillido radical, both of which would initiate polymerization of vinylmonomer as the end groups of the polymers formed.展开更多
Two molecularly imprinted polymers binding to analgesic acetanilide were prepared using either dual functional monomers of calix[4]arene derivative and acrylamide or single monomer acrylamide, respectively. The polyme...Two molecularly imprinted polymers binding to analgesic acetanilide were prepared using either dual functional monomers of calix[4]arene derivative and acrylamide or single monomer acrylamide, respectively. The polymers were ground, sieved and investigated by equilibrium binding experiment to evaluate their recognition properties for the template and other substrates. Scatchard analysis showed that homogeneous recognition sites were formed in the imprinted polymer matrix. Our results demonstrated that the polymer using two functional monomers exhibited better selectivity for the template. This study may open new frontiers for the development and application of imprinted polymers, such as drug separation and purification.展开更多
Metal ions, such as Cr<sup>6+</sup>, V<sup>5+</sup>, Ce<sup>4+</sup>, Co<sup>3+</sup>, Mn<sup>3+</sup>, coupled with some organic compounds, have been report...Metal ions, such as Cr<sup>6+</sup>, V<sup>5+</sup>, Ce<sup>4+</sup>, Co<sup>3+</sup>, Mn<sup>3+</sup>, coupled with some organic compounds, have been reported to be useful as a redox system for initiating vinyl polymerization. The organic compounds commonly used are alcohols, aldehydes, ketons, α-hydroxy acids, amines, etc. Samal et al. reported that Ce<sup>4+</sup> coupled with thioacetamide, succinamide and acetamide can initiate acryionitrile to polymerize. Feng et al. found展开更多
A reliable method for direct synthesis of β-dichlorosubstituted acetanilides is reported. The key transformation involves the oxidative and catalytic cleavage of a carbon-carbon bond in the presence of iodine trichlo...A reliable method for direct synthesis of β-dichlorosubstituted acetanilides is reported. The key transformation involves the oxidative and catalytic cleavage of a carbon-carbon bond in the presence of iodine trichloride （ICl3）. In this protocol ICl3 is used not only as the catalyst but also as the oxidant which widely broadens the scope of its ap- plication in organic synthetic chemistry.展开更多
基金the National Natural Science Foundation of China (Nos: 29477274 and 3967O420)
文摘Sorption of acetanilide herbicides, metolachlor, acetochlor, pretilachlor and butachlor on eight soils with various physical and chemical properties was studied. The adsorption isotherms could fit Freundich equation well (r 2 ≥0.91) and the adsorption extents increased in the order: metolachlor < acetochlor < pratilachlor < butachlor. The product of Freundlich adsorption constants, Kf (1/n), showed to have a good correlation with organic matter content (OM) of soils for each of these herbicides, suggesting that OM is the primary factor dominating in the adsorption process of these asetanilide herbicides. Multivariant correlation regression between Kf (1/n) and two factors, water solubility (S.) of herbicides and OM, was also performed. Kf(1/n) correlated with 1/S. and OM/S. well, showing that high S. corresponds to a weak tendency to adsorb on soils. Infrared (IR) spectra and electron spin resonance (ESR) parameters confirmed that multifunctional H-bonds and charge-transfer bonds were the main adsorption mechanisms of these acetanilide herbicides. The abilities of herbicides to form these adsorption bonds with HA increased in the same order as the extent of adsorption.
基金Project supported by National Natural Science Foundation of China（Grant No. 20472048）, and Science Foundation of Shang-hai Municipal Commission of Science and Technology（ Grant No. 03ZR14033）
文摘Acetanilide was synthesized from nitrobenzene in the presence of acetic anhydride, acetic acid and samarium by a one-pot procedure in good yield.
基金Supported by the National Natural Science Foundation of China(No.20872104)Scientific Research of Sichuan Province and Scientific Research and Innovation Team Fund of Sichuan Normal University(No.025156)
文摘N-[4-（2-Methoxyphenoxy）]phenyl acetanilide has been synthesized and its structure was determined by X-ray diffraction analysis with a = 0.6152（4）, b = 1.1728（4）, c = 1.2367（4） nm, α = 91.34（3）, β = 93.22（4）, γ = 102.61（3）°, V = 0.8688（7） nm3 and Dc = 1.274 Mg/m3. Theoretical investigations on the title compound were carried out by full optimization on its structural unit at the B3LYP/6-31G＊＊ level. And ultimately, the infrared, Raman spectra, electronic absorption spectra, and the relationships between temperature and thermodynamic functions （Hm, Sin, Cpm） were obtained.
文摘he initiation mechanism of ceric ion/2-benzoyl acetanilide system was studiedby means of FT-IR, EPR and kinetic studies which revealed that 2-benzoyl ac-etanilide acts as a very active promotor to the polymerization initiated by ceric ion.The initiation mechanism was then proposed which involved the complex formationbetween a ceric ion and a l ,3-diketone group or a carbamate group, followed by,thedecomposition of the complex to generate C-centered secondary alkyl radical and N-centered anillido radical, both of which would initiate polymerization of vinylmonomer as the end groups of the polymers formed.
基金Project supported by the National Natural Science Foundation of China (Nos. 20175009 and 20375017) the Doctoral Foundation of Education Ministry of China (No. 2002055002) and Tianjin Natural Science Foundation (No. 033603511).
文摘Two molecularly imprinted polymers binding to analgesic acetanilide were prepared using either dual functional monomers of calix[4]arene derivative and acrylamide or single monomer acrylamide, respectively. The polymers were ground, sieved and investigated by equilibrium binding experiment to evaluate their recognition properties for the template and other substrates. Scatchard analysis showed that homogeneous recognition sites were formed in the imprinted polymer matrix. Our results demonstrated that the polymer using two functional monomers exhibited better selectivity for the template. This study may open new frontiers for the development and application of imprinted polymers, such as drug separation and purification.
基金Project supported by the National Natural Science Foundation of China
文摘Metal ions, such as Cr<sup>6+</sup>, V<sup>5+</sup>, Ce<sup>4+</sup>, Co<sup>3+</sup>, Mn<sup>3+</sup>, coupled with some organic compounds, have been reported to be useful as a redox system for initiating vinyl polymerization. The organic compounds commonly used are alcohols, aldehydes, ketons, α-hydroxy acids, amines, etc. Samal et al. reported that Ce<sup>4+</sup> coupled with thioacetamide, succinamide and acetamide can initiate acryionitrile to polymerize. Feng et al. found
文摘A reliable method for direct synthesis of β-dichlorosubstituted acetanilides is reported. The key transformation involves the oxidative and catalytic cleavage of a carbon-carbon bond in the presence of iodine trichloride （ICl3）. In this protocol ICl3 is used not only as the catalyst but also as the oxidant which widely broadens the scope of its ap- plication in organic synthetic chemistry.
