摘要：
A series of 2-phosphonoalkyl 1,2-benzisoselenazol-3(2H)-ones were designed and synthesized via reaction 2-chloroselenobenzoyl chloride with 1-hydrazinobenzyl phosphonate. The structures of all new compounds were confirmed by spectroscopic methods and microanalyses.
作者机构：
[Yu, Y] Cent China Normal Univ, Dept Chem, Wuhan 430079, Peoples R China.;Nankai Univ, Coll Environm Sci & Engn, Tianjin 300071, Peoples R China.;Riyue Yongli Battery Ltd Co, Wuhan 430034, Peoples R China.
通讯机构：
[Yu, Y] C;Cent China Normal Univ, Dept Chem, Wuhan 430079, Peoples R China.
摘要：
On the basis of the experimental methods of flocculated decolorization and equilibrium dialysis, the effect of dye structure on the interaction between organic flocculant PAN-DCD and dye has been explored. It was found that, under acidic conditions, PAN-DCD is effective in the decolorization of dyes with sulfonic acid groups and carboxyl groups and that the number of these groups has something to do with decolorization effectiveness. The more acidic groups in the dye, the greater the interaction extent between the flocculant and the dye and the higher the decolorization efficiency (DE) of the dye. Meanwhile, the hydrophobic groups in dyes also affect the binding of the dyes by PAN-DCD. The more hydrophobic groups in the dye, the higher the DE of the dye. The bigger the hydrophobic group in the dye, the more intensive the interaction of the dye with the flocculant. Furthermore, amino and hydroxyl groups in dyes are related to the DE of the dyes as well, according to the formation of a hydrogen bond with the groups in the macromolecule. Therefore, the process of flocculated decolorization, resulting from the interaction between dye molecules and the flocculant, is controlled by both energetic and hydrophobic interactions.
摘要：
The binuclear structure of Fe2(DTPB)(μ-O)(μ-Ac)CI(BF4)2 (DTPB = 1,1,4,7,7-penta (2′-benzimidazol-2-ylmethyl)-triazaheptane, Ac = acetate) was characterized by UV-visible absorption and infrared spectra and NMR and ESR. The binding interaction of DNA with the diiron complex was examined spectroscopically. Supercoiled and linear DNA hydrolytic cleavage by the diiron complex is supported by the evidence from anaerobic reactions, free radical quenching, high performance liquid chromatography experiments, and enzymatic manipulation such as T4 ligase ligation, 5′-32P end-labeling, and footprinting analysis. The estimation of rate for the supercooiled DNA double strand cleavage shows one of the largest known rate enhancement factors, ∼1010 against DNA. Moreover, the DNA hydrolysis chemistry needs no coreactant such as hydrogen peroxide. The poor sequence-specific DNA cleavage indicated by the restriction analysis of the pBR322 DNA linearized by the diiron complex might be due to the diiron complex bound to DNA by a coordination of its two ferric ions to the DNA phosphate oxygens, as suggested by spectral characterizations. The hydrolysis chemistry for a variety of binuclear metal complexes including Fe2(DTPB)-(μ-O)(μ-Ac)CI(BF4)2 is compared. It is established that the dominant factors for the DNA hydrolysis activities of the binuclear metal complexes are the μ-oxo bridge, labile and anionic ligands, and open coordination site(s). Concerning the hydrolytic mechanisms, the diiron complex Fe2(DTPB)(μ-O)(μ-Ac)CI(BF4)2 might share many points in common with the native purple acid phosphatases.
作者机构：
[Guo, RW] Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Kowloon, Hong Kong, Peoples R China.;Cent China Normal Univ, Dept Chem, Wuhan 430070, Peoples R China.
通讯机构：
[Guo, RW] H;Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Kowloon, Hong Kong, Peoples R China.
摘要：
The crystal structure determination of the title compound, C7H11NO3, shows that it is the E isomer. An N-H...O intermolecular hydrogen bond is observed. The molecules are linked along [101] through this intermolecular hydrogen bond.
作者机构：
Cent China Normal Univ, Chem Coll, Wuhan 430079, Peoples R China.;Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.
关键词：
rare earths;beta-alanine;thermochemistry;standard molar enthalpy of formation
摘要：
Lanthanum complex crystal with beta-alanine (1 : 3) was synthesized. Through the DTA, TG, chemistry analysis and comparison with literature, it shows that its form is \ [La-2(beta-ala)(6) . (H2O)(4)] (ClO4)(6).H2O\(n), and its purity is 98.86%. The dissolution enthalpy of the reactants and products in 2 mol . L-1 HCl solution ( 298.15K) was measured by using the isoperibol reaction calorimetry. Delta(r)H(m) was calculated by a designed thermochemical cycle of the coordination reaction. Front the results and other auxiliary quantities, the standard molar enthalpy of formation of [La-2(beta-ala)(6) . (H2O)(4)] (ClO4)(6) . H2O is obtained to be Delta(integral)H(m)degrees\ [La-2(beta-ala)(6) . (H2O)(4)] (ClO4)(6) . H2O\ = - 7062.911 kJ . mol (-1).
作者机构：
[Guo, RW] Cent China Normal Univ, Dept Chem, Wuhan 430070, Peoples R China.;Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Kowloon, Hong Kong, Peoples R China.
通讯机构：
[Guo, RW] C;Cent China Normal Univ, Dept Chem, Wuhan 430070, Peoples R China.
摘要：
The title compound, C13H15NO3, is an E isomer and the phenyl ring does not conjugate with C=C. Both intra- and intermolecular N—H⋯O hydrogen bonds are found, and the infinite molecular chains stretch along the b axis.
摘要：
4H-Imidazolin-4-ones 3 and 4 were synthesized respectively by base catalytic reactions of 4-methylthiophenol or phenthiol with carbodiimides 2, which were obtained via aza-Wittig reaction of iminophosphorane 1 with aromatic isocyanates. 3 and 4 exhibited good fungicidal activity against Pellicularia sasakii.
