摘要：
A novel water-compatible hypercrosslinked resin modified by p-aminophenol was synthesized with chloromethylated polystyrene and p-aminophenol by Friedel-Crafts reaction. The objective of this work was to study the adsorption performances for salicylic acid onto p-aminophenol resin. The results showed that the adsorption capacity of salicylic acid onto p-aminophenol resin was superior to XAD-4 resin. It is seen that the maximum adsorption capacity is observed at pH of 3.0. It was found the adsorption dynamics obeyed the pseudo-first-order rate equation and the intra-particle diffusion was the rate-limiting step. The maximum adsorption capacity of salicylic acid for p-aminophenol resin was measured to be 283.7 mg/g with the equilibrium concentration at 404.6mg/L. The micropore structure, the pore diameter of p-aminophenol resin, the hydrogen bond between p-aminophenol resin and salicylic acid bring the larger adsorption capacity.
作者机构：
[龙立平; 王姣亮] College of Chemistry and Environmental Engineering, Hunan City University, Yiyang 413000, China;[徐满才] College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China;[肖谷清] College of Chemistry and Environmental Engineering, Hunan City University, Yiyang 413000, China<&wdkj&>College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
通讯机构：
[Xiao, G.] C;College of Chemistry and Environmental Engineering, , Yiyang 413000, China
作者机构：
[刘文英; 王威燕; 胡韬; 杨运泉; 王锋; 罗和安] School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China;[王锋] Department of Chemical and Environment Engineering, Hunan City University, Yiyang 413000, China
期刊：
SCIENCE IN CHINA SERIES B-CHEMISTRY,2010年53(5):1095-1101 ISSN：1006-9291
通讯作者：
Shan, Z.(zxshan@whu.edu.cn)
作者机构：
[Hu XiaoYun; Hu Lin; Shan ZiXing] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China.;[Luo XinXiang] Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413049, Peoples R China.
通讯机构：
Department of Chemistry, Wuhan University, China
关键词：
SOLVENT-FREE;REACTION;solid;base;mixture;catalysis;CHEMOSELECTIVITY;aldehyde-ketone;REACTION;solid base mixture catalysis;chemoselectivity;aldehyde-ketone reaction
摘要：
Solvent-free reactions of aromatic aldehydes with three representative ketones,including acetophenone,acetone and cyclohexanone,have been examined under the catalysis of a low-cost inorganic base system consisting of NaOH and K2CO3.It was found that the chemoselectivity of the reactions is in close relationship with the composition of the reactants and the doublecomponent catalyst.Under the optimized experimental conditions,1,2,3,4,5-pentasubstituted cyclohexanols,α,β-unsaturated ketones and Claisen-Schmidt bicondensation products were obtained in high yields.Two Kostanecki’s triketones were separated,The composition and structure were affirmed by X-ray crystallographic analysis.
摘要：
I2S (Inter-IC Sound Bus) is one of the general audio buses applied in various industrial or embedded systems. It only processes the audio data, while other signals like various codes and control signals are transmitted individually. This paper presents an approach how to construct an embedded audio system using the I2S bus to connect relevant supporting code chip and decode chip. This system can reduce the consumption of system resources drastically, therefore fluent WAV broadcast can be guaranteed. Moreover, the familiar media files, such as MPEG1, MPEG2, MP3, MPEG4 can be played through adding its decoder. The ARM chipset of the LPC2300 series is applied in this system, therefore, system's reliability can be improved. This method can be wiedly used in vehicle- borne, ship-borne embedded flash players and portable media players.
关键词：
solvent-free reaction;solid base mixture catalysis;chemoselectivity;aldehyde-ketone reaction
摘要：
Solvent-free reactions of aromatic aldehydes with three representative ketones, including acetophenone, acetone and cyclohexanone, have been examined under the catalysis of a low-cost inorganic base system consisting of NaOH and K(2)CO(3). It was found that the chemoselectivity of the reactions is in close relationship with the composition of the reactants and the double-component catalyst. Under the optimized experimental conditions, 1,2,3,4,5-pentasubstituted cyclohexanols, alpha,beta-unsaturated ketones and Claisen-Schmidt bicondensation products were obtained in high yields. Two Kostanecki's triketones were separated, The composition and structure were affirmed by X-ray crystallographic analysis.
作者机构：
[胡拥军] Department of Chemistry and Environmental Engineering, Hunan City University, Yiyang 413000, China;[李义兵; 胡拥军; 陈白珍] School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China
通讯机构：
[Hu, Y.] D;Department of Chemistry and Environmental Engineering, , Yiyang 413000, China
摘要：
<jats:title>Abstract</jats:title><jats:p>Cyt2Ca1 is an insecticidal crystal protein produced by <jats:italic>Bacillus thuringiensis</jats:italic> ET29 during its stationary phase, and this δ‐endotoxin demonstrates remarkable insecticidal activity against not only insects of the order <jats:italic>Coleoptera</jats:italic>, but also against fleas, and in particular the larvae of the cat flea, <jats:italic>Ctenocephalides felis</jats:italic>. The first theoretical model of the three‐dimensional structure of Cyt2Ca1 was predicted and compared with Cyt2Aa, which is lethal to insect larvae. The three‐dimensional structure of the Cyt2Ca1 was obtained by homology modeling on the structures of the Cyt2Aa protein. The deduced model resembles previously reported Cyt2Aa toxin. A binding mode of inositol monophosphate as a polar head group of the putative membrane phospholipid ligand to Cyt2Ca1 was presented using molecular docking. The residues of Leu9, Glu21, Tyr23 and Gln110 of the Cyt2Ca1 toxin are responsible for the interactions with inositol monophosphate via eight hydrogen bonds. Those residues could be important for receptor recognition. This binding simulation will be helpful for the design of mutagenesis experiments aimed at the improvement of toxicity, and lead to a deep understanding of the mechanism of action of Cyt toxins.</jats:p>
摘要：
A novel carbazole functionalized bis-β-diketone type organic ligand, 1,1′-(2,6-bispyridyl)bis-3-(9-ethylcarbazole-3-yl)-1,3-propanedione (H2L) and its corresponding lanthanide complexes Eu2(L)3and Tb2(L)3 were successfully prepared. The ligand and complexes were characterized in detail based on FT-IR spectra, 1H NMR and elemental analysis. The observed UV-Vis absorption and photoluminescence properties of the complexes were investigated, it shows that the Eu(III) and Tb(III) ions can be sensitized efficiently by the ligand (H2L) to some extent, in particular, the complex Tb2(L)3 exhibits a more excellent luminescence property than the Eu(III) complex. Meanwhile, the introduction of the carbazole moiety can enlarge the π-conjugated system of the ligand and enhance the luminescent intensity of the complexes. The results show that the complexes would be used as excellent luminescent materials.
