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CATALYTIC ACTIVITY OF TRANSITION METAL SUBSTITUTED POLYOXOMETALATES FOR ALKENE EPOXIDATION

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Chinese Chemical Letters 1995年第2期6卷 155-158页

作者： jing fu liu Qi Hua YANG Ming Xiu LI Dgpartment of Chemistry Northeast Normal UniversityChangchun130024

The alkene cpoxidation by iodosylbenzene can be catalyzed by transition metal substituted polyoxometalates. Among the polyoxomctalates examined β-SiW9M3 and ZnW11Ti was found to be the most cfficient catalyst. The ox... 详细信息

关键词： ?

Removal of iodide anions in water by silver nanoparticles supported on polystyrene anion exchanger

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Journal of Environmental Sciences 2023年第6期128卷 45-54页

作者： Li Li Su-Juan Yu Rong-Gang Zheng Peng Li Qing-Cun Li jing-fu liu State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances Institute of Environment and HealthJianghan UniversityWuhan 430056China University of Chinese Academy of Sciences Beijing 100049China Department of Ecology and Resources Engineering He Tao CollegeInner Mongolia 015000China

The removal of iodide(I^(−))from source waters is an effective strategy to minimize the formation of iodinated disinfection by-products(DBPs),which are more toxic than their brominated and chlorinated *** this work,a nanocomposite Ag-D201 was synthesized by multiple in situ reduction of Ag-complex in D201 polymer matrix,to achieve highly efficient removal of iodide from *** electron microscope/energy dispersive spectrometer characterization showed that uniform cubic silver nanoparticles(AgNPs)evenly dispersed in the D201 *** equilibrium isotherms data for iodide adsorption onto Ag-D201 was well fitted with Langmuir isotherm with the adsorption capacity of 533 mg/g at neutral *** adsorption capacity of Ag-D201 increased with the decrease of pH in acidic aqueous solution,and reached themaximum value of 802 mg/g at pH *** was attributed to the oxidization of I^(−),by dissolved oxygen under the catalysis of AgNPs,to I2 which was finally adsorbed as ***,the aqueous solutions at pH 7–11 could hardly affect the iodide *** adsorption of I^(−)was barely affected by real water matrixes such as competitive anions(SO_(4)^(2−),NO_(3)^(−),HCO3−,Cl^(−))and natural organic matter,of which interference of NOM was offset by the presence of Ca^(2+).The proposed synergistic mechanism for the excellent performance of iodide adsorption by the absorbent was ascribed to the Donnan membrane effect caused by the D201 resin,the chemisorption of I^(−)by AgNPs,and the catalytic effect of AgNPs.

关键词： Ag-D201 Iodide removal Donnan membrane effect Chemisorption Catalytic effect High selectivity

Synthesis, structure and spectroscopic properties oforganophosphoryl polyoxotungstates of Formula α-[R_2PW_9O_(34)]^(5-)(R=C_6H_5P(S), C_6H_(11)P(O))

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Chinese Chemical Letters 1999年第11期10卷 971-972页

作者： Zhen Gang SUN Jian Xin LI Qun liu jing fu liu(Department. of Chemistry, Northeast Normal University, Changchun 130024) NE Normal Univ Dept Chem Changchun 130024 Peoples R China

Tetrabutylammonium salt of organophosphoryl derivatives of trivacant tungstophosphateof formula α -[R_2PW_9O_34]~5-(R=C_6H_5P(S), C_6H_11P(O)) have been prepared, purified andcharacterized by elemental analysis, IR, ~31P and ~183W NMR. According to spectroscopicobservations and chemical analysis, the hybrid anion consists of an α-[PW_9O_34]~9- framework onwhich are grafted two equivalent organophosphoryl groups through P-O-W bridges, and the IRspectral data show that these new species still retain the keggin structure.

关键词： Polyoxometalates organophosphorus complex.

SYNTHESIS OF A TITANIUM-CONTAINING POLYOXOANION [ZnW_(11)O_(39)Ti(H_2O)]^(6-) AS CATALYST FOR ALKENE EPOXIDATION

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Chinese Chemical Letters 1995年第2期6卷 153-154页

作者： Ming Xiu LI jing fu liu Ying WANG Qi Hua YANG Ya Guang CHEN Department of Chemistry Northeast Normal University Changchun 130024

The synthesis and characterization of the previously unreported[ZnW11O39Ti (H2O)](6-) polyoxoanion is described. Also reported is a survey of the catalytic epoxidation of five olefinic substrates PhIO or 30% aqueous H... 详细信息

关键词： 2&

α-Oxoketene Cyclic S, S-cetals Chemistry-Substitution Reaction of α,α'-Dicinnamoyl Ketene Cyclic S, S-Acetals with Ethylenediamine

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Chinese Chemical Letters 1998年第3期9卷 231-232页

作者： Mei Xin ZHAO Qun liu fu Shun LIANG jing fu liu Bao Zhong ZHAO LianZhong LI (Department of Chemistry, Northeast Normal University, Changchun, 130024)(Department of Chemistry, Jilin Teacher college, Jilin, 131000) NE Normal Univ Dept Chem Changchun 130024 Peoples R China Jilin Teacher Coll Dept Chem Changchun 131000 Peoples R China

α,α'-Dicinnamoyl ketene cyclic S, S-acetals 4 were reacted with ethylenediamine to afford α,α'-dicinnamoyl ketene cyclic N,N-acetals 5. This process provides a new method for thesynthesis of 5 in high yield under ... 详细信息

关键词： α,α'-dicinnamoyl ketene cyclic S,S-acetals ethylenediamine substitution reaction,α,α'-dicinnamoyl ketene cyclic N,N-acetals

Distribution and chemical speciation of arsenic in different sized atmospheric particulate matters

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Journal of Environmental Sciences 2021年第10期33卷 1-7页

作者： Jin Xie Xiao-Dong Niu Jiao-Jiao Xie Kai-Qiang He Meng-Dan Shi Su-Juan Yu Chun-Gang Yuan jing-fu liu State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control Department of Environmental Science&EngineeringNorth China Electric Power UniversityBaoding 071000China

The distribution and chemical speciation of arsenic(As)in different sized atmospheric particulate matters(PMs),including total suspended particles(TSP),PM_(10),and PM_(2.5),collected from Baoding,China were *** average total mass concentrations of As in TSP,PM_(10),and PM_(2.5)were 31.5,35.3,and 54.1μg/g,respectively,with an order of PM_(2.5)>PM_(10)>TSP,revealing that As is prone to accumulate on fine *** to the divergent toxicities of different As species,speciation analysis of As in PMs is further *** of previous studies mainly focused on inorganic arsenite(iAs^(Ⅲ)),inorganic arsenate(iAs^(Ⅴ)),monomethylarsonate(MMA),and dimethylarsinate(DMA)in PMs,while the identification and sensitive quantification of trimethylarsine oxide(TMAO)were rarely *** this study,a high-performance liquid chromatography coupled to inductively coupled plasma mass spectrometry system was optimized for As speciation including TMAO in *** anion exchange column was used to separate MMA,DMA and iAs^(Ⅴ),while a cation exchange column to separate TMAO and iAs^(Ⅲ).Results showed that iAs^(Ⅴ) was the dominate component in all the samples,corresponding to a portion of 79.2%±9.3%of the total extractable species,while iAs^(Ⅲ),TMAO and DMA made up the remaining 21%.Our study demonstrated that iAs^(Ⅲ) accounted for about 14.4%±11.4%of the total extracted species,with an average concentration of 1.7±1.6 ng/m^(3).It is worth noting that TMAO was widely present in the samples(84 out of 97 samples),which supported the assumption that TMAO was ubiquitous in atmospheric particles.

关键词： Arsenic Particulate matters Speciation Size distribution

Synthesis, Structure of Organophosphonyl Polyoxotungstates of Formula [C_6H_(11)P (O)]_2 X^(n+)W_(11)O^((8-n)-)_(39) (X^(n+)=P^(5+), Si^(4+), B^(3+), Ga^(3+))

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Chinese Chemical Letters 1999年第8期10卷 705-706页

作者： Zhen Gang SUN jing fu liu Xiao Hong WANG Shu Mei YUE Jian Xin LI (Department of chemistry, Northeast Normal University, Changchun 130024) Department of Chemistry Northeast Normal University Changchun 130024 China

Cyclohexanephosphonyl heteropolyundecatungstates of formula [C6H11P(O)]2 Xn+ W11O398-n- (Xn+=P5+, Si4+, B3+, Ga3+ have been prepared. purified and characterized by elemental analysis .IR and 1H. 31P and 183W NMR.

关键词： Polyoxometalates organophosphorus,complex

SYNTHESIS AND ￣(183)W NMR CHARACTERIZATION OF A-β-Ge_2W_18Ti_6O_(77)￣(14) HETEROPOLYANION

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Chinese Chemical Letters 1995年第3期6卷 265-266页

作者： Lu MENG jing fu liu(Department of Chemistry, Northeast Normal University, Changchun 130024)

A dimeric Keggin-type polyoxotungstate β-Ge2W18Ti6O77 has been synthesized from the lacunary precursor β-GeWoO34 and characterized by means of elemental analysis IR, polarogram 183W NMR and FAB mass *** 183W NMR spectrum consists of two lines with intensity ratio 1:2 as expected for trisubstituted *** the help of FAB mass *** concluded that it is a dimer of two Keggin units with D symmetry.

关键词： NMR SYNTHESIS AND CHARACTERIZATION HETEROPOLYANION OF Ge2W18Ti6O Ti

SYNTHESIS AND ￣(183)W NMR CHARACTERIZATION OF P_4W_(30)Al_4 (H_2O)_2O_(112)￣(20-) HETEROPOLYANION

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Chinese Chemical Letters 1995年第5期6卷 453-454页

作者： Lu MENG jing fu liu (Department of Chemistry, Northeast Normal University, Changchun 130024)

A trivacant heteropolytungstate derivative P4W30Al4 (H2O) 2O11220-has been synthesized from the lacunary precursor Na12 [α-P2W15O56]24H2O and characterized by IR. polarogram and 183W NMR spectrum 183W NMR of the title anion consists of eight lines with intensity ratio 1: 2: 2: 2: 2: 2: 2: 2 as expected for the dimeric Dawson- typed anion with C2h symmetry.

关键词： NMR CHARACTERIZATION SYNTHESIS OF H2O Al4 AND