Abstract:Magnetic N-carboxymethy chitosan as a kind of potential magnetic resonance imaging contrast agent was synthesized by a simple and economic route (compared with traditional Microemulsion and Thermal Decomposition). N-carboxymethyl chitosan was synthesized by the process of carboxymethylation of chitosan firstly. Then, Fe3O4 nanoparticles were obtained by in-situ reaction in the chains of N-carboxymethyl chitosan. The characterization and performance of magnetic N-carboxymethy chitosan were tested. The result of TGA showed that the generation amounts of Fe3O4 were related to the contents of catboxymethyl groups in N-carboxymethy chitosan. It increased unceasingly along with the increase of the contents of catboxymethyl groups. But the generation amounts of Fe3O4 reach a peak when the contents of catboxymethyl groups increased to some degree. The result of TEM presented that the average grain size of the Fe3O4 nanoparticles was about 5-10 nm. The MRI depicted that the magnetic N-carboxymethy chitosan provided high transversal relaxation rate with 82.82 mmoL/L/s. It was higher than the minimum standard of R2 being over 62 mmoL/L/s when superparamagnetic iron oxide as magnetic resonance imaging contrast agent. The magnetic N-carboxymethy chitosan could be used as a kind of potential magnetic resonance imaging negative contrast agent.

Abstract:The hydrolysis reaction and thermal-oxidative degradation tend to occur in the traditional polyacrylamide polymers under high temperature and high salinity conditions, leading to a reduction of polymer solution viscosity with increasing the temperature and salt content, and finally the limitation of their applications. A small amount of hydrophobic groups introduced onto the hydrophilic macromolecular chains of polymers endow them with the special rheological properties and excellent tolerance to high temperature and high salt content. This paper summarizes the research progress of the heat and salt-resistant water-soluble polyacrylamide series in recent years in detail based on different unit construction of monomers. Furthermore, the gelation and profile modification mechanism and research status of the salt and heat-tolerant crosslinking polymers, especially the weak gel flooding agents, were concisely discussed.

Abstract:CdSe nanoparticles have been prepared by ultrasonic assisted ionic liquid method and characterized by XRD, SEM and fluorescence spectroscopy. XRD spectrum demonstrates the product is a cubic phase of well–crystallized CdSe and the crystallinity increases with increasing reaction time. The effects of ionic liquid of [Bmim]OH–H2O and reaction time on microstructure and fluorescence of the CdSe were studied. The diameter of CdSe nanoparticles synthesized in 1 ml [Bmim]OH–H2O solution (ultrasonic irradiation, 1 h)is 30-60 nm and fluorescence intensity achieves 54 a.u.. CdSe nanoparticles could be enhanced by the method of being coated with ionic liquid to prevent the aggregation of nanoparticles.

Abstract:A fluorescent molecular probe CCu for Cu2+ based on biscoumarin bearing hydrazide and imine unit was designed and synthesized. The structure of CCu was identified by 1HNMR, IR, HRMS and elemental analysis, and the spectral properties of CCu was investigated. CCu exhibited Cu2+-only sensitive among metal ions such as alkali (K+, Na+), alkaline earth (Ca2+, Mg2+), and transition metal ions (Cd2+, Ag+, Fe3+, Pb2+, Cr3+, Co2+, Ni2+, Cu2+, Zn2+). The addition of Cu2+ led to a 38 nm blue-shift in absorbance maximum, a 17 nmblue-shift in fluorescence maximum , a 8.2-fold fluorescence enhancement and an obvious fluorescence change from almost colorless to blue. CCu was pH-insensitive Cu2+ fluorescent probe with the pKa of 3. 32 ± 0. 07, which could be used for Cu2+ detection in neutral and weakly alkaline pH span.

Abstract:the electronic ink microcapsules containing TiO2 nanoparticles modified with stearic acid dispersed in Tetrachloroethylene（TCE）were prepared by complex coacervation using Gelatin-Gum acacia as wall materials. The influence of SDS on complex coacervation was discussed. The influence of Span on surface morphology of the electronic ink microcapsules was also studied. The results showed there was high surface activity existed complex coacervation generated between SDS and gelatin. Furthermore, When the concentration of Span 80 increased to 2.0-3.0 %, the microcapsules can be prepared with regular morphology and transparent and smooth surface, the average diameter was ~60 μm. Finally, the particles in microcapsules possessed reversible response to dc under the electric field intensity of 2.5V/μm

Abstract:N-[3-perfluorohexylsuflonamido)propyl] -N,N,N-trimethyl ammoniuim iodide [I] was prepared by amidation from perfluorohexylsulphonyl fluoride [II] and N,N-dimethyl-1,3-propane diamine [III], then quaternization with methyl iodide [IV], and was characterized by IR, 1H NMR, and MS. The surface tension (γ) and critical micelle concentration (CMC) of aqueous solutions of I were investigated. The optimal process conditions of amidation: n(II)：n[III]＝1:1.2, the reactants agitated at room temperature for 3h in EtOAc and in the presence of N(Et)3. the reaction temperature to give C6F13SO2NHC3H6N(CH3)2 [V] in the yield of 90.9%. The optimal process conditions of quaternization: n[V] : n(IV)＝1:1.7, V and IV reacted at room temperature for 2h in CCl4 to give I in the yield of 97.6 %. The CMC of aqueous solution of I is 3.50 mmol/L and its γCMC is 17.8 mN/m which show excellent performance of surface activity of I.

Abstract:The compositions and contents of volatile components from dracocephalum integrifolium Bge. were analyzed by using headspace solid-phase microextraction (HS-SPME) fixed with gas chromatography-mass spectrometry (GC-MS) method. The results indicate that volatile components were basically identical on the main components for 6 min and 30 min headspace adsorption time except for different proportion. The hydrocarbons (mainly for terpenoids) were gave priority to dracocephalum integrifolium Bge, which account for about 50%, the alcohol compounds for around 20%, others are in order as esters, ketones, terpene oxides and aldehyde compounds, respectively. However, the contents in such as ether, amine and sulfur compound were very low.

Abstract:The catalyst (HPW/APTES-SiO2) of heteropoly acid supported on acid activated and silanizing silica (APTES-SiO2) by 3-aminopropyl-triethoxysilane (APTES) was prepared via chemical bonding. The properties of the catalyst was characterized by infrared spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller (BET) specific area measurement and thermogravimetric analysis（TG-DTA）.The catalytic activity of the catalyst was determined by the condensation of cyclohexanone with glycerol. The highest conversion of cyclohexanone and the selectivity of 1,4-dioxasp iro[4,5] decane-2-methanol reached 92.7% and 97. 8%, respectively, by using HPW/APTES-SiO2 as the catalyst under the optimum reaction conditions .The recycling tests show that the catalyst can be easily separated from the reaction system and to be reused many times.

Abstract:The catalytic process of tetrahydrofurfuryl alcohol(THFA) and ammonia by fixed-bed reactor to give pyridine was studied. Various Ni-NiO content of Ni-NiO/γ-Al2O3 catalysts were prepared. The catalyst was characterized. The catalytic effect of the reaction between tetrahydrofurfuryl alcohol and ammonia to obtain pyridine and other main byproducts was estimated. The influences of temperature, molar ratio of ammonia and THFA， and LHSV on the catalytic reaction were investigated. The catalytic results of Ni-NiO/γ-Al2O3 catalyst were given as the followings. With the increase of Ni-NiO content in catalyst, the content of pyridine and isoquinoine in products increases. Piperidine content decreases; In certain temperature range between 350℃~550℃, with the temperature increasing, pyridine content in products increases. Piperidine content decreases. Isoquinoline content has higher value at the temperature of 400℃.

Abstract:Abstract: Chemical method was adapted to prepare the key substrate , l – α – phosphatidylinositol(PI）, of Listeria monocytogenes(LM） chromogenic medium. The purity and the yield were contradict factors which could not be improved both in the extraction of PI. The experiment combined single and mixed solvent methods to extract PI, especially investigated the influences of solvent ratio, solvent volume, the kind of alkalinity substances to the purity and yield of the products. The optimal conditions appeared after pretreatment of alkali methanol, under the solvent ratio of V(n-hexane) ： V(ethanol solution) = 1:1.5, using aqueous ammonia as alkalinity substance, and pH = 8.0. The comparison of color development among the PI before and after the purification and the product purchased from abroad, showed that the product had a promising application future.

Abstract:A type of visible light catalysis Cu-BiVO4 is prepared by hydrothermal method and characterized by UV-vis DRS and XRD. Using the thiophene in octane as the simulation of model sulfur compounds, the desulfurization activity of Cu-BiVO4 was researched by photocatalytic oxidation in visible light. The effects of pH of catalysts prepared, irradiation time, photocatalyst Cu-BiVO4 mass, air flow on the desulfurization efficiency were also investigated. The results show that the Cu-BiVO4 catalyst has a significant red-shift in the absorption band in the visible region, and the absorption intensity increases greatly for the composite catalyst. Under suitable conditions, the desulfurization rate of Cu-BiVO4 to the model compound can reach 95%.

Abstract:The Pt-K/AC, Pt-K/γ-Al2O3, Pt-K/MgO and Pt-K/TiO2 catalysts with were prepared by the impregnation method using AC, γ-Al2O3, MgO and TiO2 as the support, respectively, and H2PtCl6 as the precursor. Catalytic performance of the catalysts for preparing o-phenylphenol(OPP) form cyclohexanone dimers dehydrogenation was evaluated in a fixed bed reactor. These catalysts were characterized by X-ray diffraction , X-ray photoelectron spectroscopy , H2 temperature programmed desorption and CO2 temperature programmed desorption. The results showed that the Pt content, basicity and adsorption of hydrogen of the Pt catalysts were influenced by the different supports. Pt-K/γ-Al2O3 had highest surface Pt content (0.41%), and more surface base sites were favorable for the adsorption of hydrogen and intermediate products and consequently increased the conversion of dimers and the selectivity for OPP. The conversion of the dimer and the selectivity of OPP was always over 99% and 90% with 0.12 h-1 of LHSV and 33 ml/g.h H2 flow rate at 380 ℃ over Pt-K/γ-Al2O3 catalyst during the pilot scale test of～8,000 h.

Abstract:3-(4-amino-3-phenyl-5-thione-4,5-dihydro-1H-1,2,4-triazol-1-yl)-1,3-diphenylpropan-1-one(4) was synthesized by nucleophilic substitution of 4-amino-3-phenyl-5- mercapto-1, 2, 4-triazole and chalcone under microwave irradiation, then reacted with aryl aldehydes to give seven novel triazolethione Schiff-base derivatives(5a-5g), namely3-(4-arylimino-3-phenyl-5-thione-4,5-dihydro-1H-1,2,4-triazol-1-yl)-1,3-diphenylpropan-1-one. The influence of mole ratio of substance, the amount of catalyst, solvent, reaction time and radiant power upon the product yield was discussed. The optimal conditions for preparation were ascertained as follows: n(aromatic aldehyde): n(amino substituted triazolethione)=1:1.1, the amount of acetic acid was 2ml, the time was 5~7min, microwave power was 500W, the solvent was DMF, and the yields were 71%~87%. The structures of intermediate and target compounds were characterized by IR, MS, 1H NMR spectra and elemental analysis．

Abstract:Crude polysaccharides obtained from Prunella vulgaris Linn by boiling water extraction and ethanol deposition, was decolorized and deproteinized with HZ-820-type resin adsorptive and further purifed by DEAE-Sepharose Fast Flow ion-exchange column chromatography and Sephadex G-50 Gel column chromatography. After that, the physicochemical properties of purified acidic polysaccharide were analyzed by gas chromatography, infrared, thermal analysis and scanning electron microscopy. Finally, antioxidant activities of it were also studied. The results exhibited that the acidic polysaccharide consisted of rhamnose, xylose, arabinose, glucose and mannose, the content of them were 0.9857％、 1.7568％、3.2029％、1.9753％ and 0.6806％, respectively. The weight-average molecular weight of acidic polysaccharide was 57234Da. The acidic polysaccharide began to degrade at 230℃ and the degradation ended at 600℃, which have better thermal stability. Meaning while, it have smooth surface, random coil and present thin slice. The antioxidant activity showed that acidic polysaccharide of Prunella vulgaris Linn had eliminating capability on NO2- radical, and also had significant reducing power and the chelating ability on ferrous ions.

Abstract:In this paper,potato starch,polyethylene glycol were used as the raw materials,adopting trans- glycosylation to synthesize polyethylene glycol glycoside,with the yield of the target product as the research index,the optimum conditions of synthesizing polyethylene glycol glycoside were investigated by orthogonal as follows: reaction temperature 118℃, reaction time 4.5h, m(starch):m(PTSA): m(ethylene glycol):m(PEG800)=1:0.025:4:2.The yield of the target product was 154.58%.The product was characterized with FT-IR, GC-MS and the moisture retention was analyzed. The results showed that the product belong to a kind of glycosidic substances, and the product with excellent moisture retentiveness was obtained.

Abstract:CuNiAl-LDHs were synthesized by coprecipitation method, and then the synthesized hydrotalcite-like were calcined under 600℃ to obtain the highly dispersed CuNiAl complex metal oxide as catalyst. The hydrotalcite-like compounds and complex metal oxides were characterized by FT-IR XRD and SEM. Then CuNiAl complex metal oxide was used as catalyst in ClO2 catalytic oxidation of phenol. The crystalline structure of CuNiAl-LDHs varied with the ratio of Cu, Ni and Al, and CuNiAl-LDHs with Cu/Ni/Al molar ratio of 1:1:1 had high crystallinity and single structure. CuNiAl complex metal oxide prepared by calcining CuNiAl-LDHs with Cu/Ni/Al molar ratio of 1:1:1 can catalyze ClO2 catalytic oxidation of phenol and promote the deep degradation of phenol, resulting in the increase of COD removal ratio. The COD removal ratio can reach 65% in the condition of 3g/L catalyst, pH 7.0, reaction time 60min and room temperature.

Abstract:From spirocyclic phosphate, 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphasprio [5.5]undecane-3,9-dioxide (SPDPC) and piperazine mixed in appropriate ratio in high speed universal grinder, no solvent and catalyst, spirocyclic piperazine phosphate was synthesized under the heat energy produced from the grinder rotating knife high-speed shear strength. The mole ratio of raw material and the mixing time were researched and the suitable reaction condition was identified. The result is SPDPC and piperazine were mixed 350 s in 1:2(n/n) and the fuzzy white powder yielded over 95%. The product’s structure was characterized by IR and NMR.

Abstract:The amphoteric hydrophobic association polyacrylamide (HAPAM), AA/ AM/ AMC8S/ DMDAAC, with hydrophobic carbon chain, sulfonic group and quaternary ammonium group was synthesized using AM, DMDAAC and AMC8S as monomers, the average molecular weight was 5.5×106, The structure was characterized by infrared spectrum and 1H-NMR. Based on the researches of monomer conversion and molecular weight, the optimum reaction conditions were obtained: ω(monomer concentration)= 30%, ω (initiator) = 0.1% (based on the total amount of the monomers), reaction temperature 55 ℃, reaction time 5 h and productivity 84%. At the same time, the results showed that when temperature was 80℃, viscosity reserved rate was more than 66%, salinity was 8%, viscosity reserved rate was more than 75%, shear-resistant time was 240 min, viscosity reserved rate increased. These performances were better than HPAM.

Abstract:The effect of the addition of some chemical substances such as Sodium dodecyl sulfate, low carbon chain of fatty alcohols and some viscous substance (sodium carboxymethyl cellulose) on the foaming ability of rosin based foaming agent and its foam stability was investigated experimentally and systematically in this paper. Results showed that introduction of three low carbon chain of fatty alcohols into the rosin based foaming agent improved the foam stability effectively, and the addition of buryl alcohol showed the best effect, 1h bleeding ratio reduced from 37% to 22.4%, whereas sodium dodecyl sulfate presented the poorest one. Stability of the resultant foam was found improved significantly with the chain length of the introduced low carbon chain of fatty alcohols at the same dosage. The simultaneous addition of 0.16% normal butanol and viscous substance Sodium carboxy methyl cellulose into the 6% diluted rosin based foaming agent was proved the most effective to the foaming ability and the stability of the resultant foam, which presented its foaming ability 27.33 and its 1h bleeding ratio16.23%.

Abstract:VO(acac)2 was synthesized from V2O3 in the present study. In the synthesis process, three oxidizing agents including air, O2, and H2O2, and toluene as a kind of water entrainment agent were introduced to facilitate the reaction and realize the continuous green synthesis of VO(acac)2. The effects of oxidizing agents were detected and the obtained VO(acac)2 was compared with commercial VO(acac)2. The results show that the yield of VO(acac)2 was significantly promoted and above 80% when used oxidizing agent. O2 was found be the most efficient oxidizing agent. The yield of VO(acac)2 can reach to 90% when O2 flow rate was 200 mL/min and reflux time was 2 h. XRD, FTIR and TG results show that the VO(acac)2 synthesized in this paper has high purity and is comparable to commercial VO(acac)2.

Abstract:5-Chloromethylsalicylaldehyde was synthesized from salicylaldehyde, paraformaldehyde and concentrated hydrochloric acid as the raw materials and used with phosphorus oxychloride. The result showed that the yield of 5-chloromethylsalicylaldehyde reached 92% when the quality of phosphorus oxychloride is 30% of the salicylaldehyde, 15~25℃, 28h, stirred. Phosphorus oxychloride was not only used as the source of hydrogen chloride in the chloromethylation reaction, but also the regeneration for the mother liquor, which reduced the discharge value of waste acid. The raw materials cost to synthesize 5-chloromethylsalicylaldehyde reduced 25% compared to the references.

Abstract:Abstract :Diglycolic acid has been synthesized by the reaction of diethylene glycol and oxygen under heterogeneous conditions using water as solvent and Bi-Pt/C as catalyst.The structure of the product is confirmed by IR,1NMR spectra,etc.Effect of reaction temperature, volumes of solvents, amounts of catalysts , amounts of oxygen and reaction time have been studied.The optimum conditions are found as follows:reaction temperature 80℃,reaction time 8h, mass ratio substrate and catalyst 30,volume ratio water and substrate 30,oxygen flow 40ml/min.Under these conditions, the average yield of diglycolic acid is 95.0%.The catalyst can not be significant decreased in the terms of catalytic activity after six recycles.