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Chinese Journal of Structural Chemistry 2013年第9期32卷 1362-1366页

作者：李杰马鹏涛 basic experiment teaching center Henan University College of Chemistry and Chemical Engineering Henan University

An organic-inorganic hybrid copper-substituted [Cu（EnMe）2 ]1.5{[Cu（EnMe）2]2-[Cu5Na（OH）4（α-SbW9O33）2]·5.5H2O（I,EnMe = 1,2-diaminopropane） has been hydrothermally synthesized and structurally characterized by elemental analysis,IR spectroscopy and single-crystal X-ray *** data for I： C21H75Cu8.50N14NaO75.50Sb2W18,Mr = 5847.83,triclinic,space group P1,a = 13.029（3）,b = 14.613（3）,c = 16.887（4）,α = 72.875（3）,β = 73.893（3）,γ = 74.761（3）o,V = 2894.0（10）3,Z = 1,S = 1.028,R = 0.0548 and wR = *** I consists of two α-SbW9O33 units joined by a cyclic {Cu5Na} *** {Cu5Na} cluster is stabilized by the inorganic O-donor ligand from both {α-SbW9O33 } and H2O ligand,in which the two disordered Cu/Na ions pairwisely part the four copper ions to form a centrosymmetric *** the cluster,two of the copper ions have no terminal water molecules,resulting in a tetragon configuration,while other four have terminal water molecules,leading to the square-pyramidal coordination geometry.

关键词： tungstoantimonite hydrothermal crystal structure

Decatungstate Incorporated Metal-organic Framework for Degradation of Rhodamine B under Sunlight Irradiation

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Chinese Journal of Structural Chemistry 2013年第12期32卷 1897-1903页

作者： LI Jie HUANG Yuan HAN Qiu-Xia Institute of Molecular and Crystal Engineering Basic Experiment Teaching CenterHenan University Environmental Monitoring Bureau Henan University

A new decatungstate incorporated metal-organic framework {[Co2（bpdo）5（H2O）n- W10O32]}n·nbpdo·2nH2O（1, bpdo = 4,4＇-bis（pyridine-N-oxide） has been synthesized through a one-step hydrothermal reaction and characterized by elemental analyses, IR, solid UV-vis absorption spectra, and single-crystal X-ray diffraction. The structural analysis indicates that 1 displays a one-dimensional ladder structure with [W10O32]4- as guest incorporated by electrostatic interaction. The photocatalytic property of the framework toward a rhodamine B （RhB） solution was also investigated. The results indicated that compound 1 possesses high photocatalytic activity in heterogeneous system under sunlight irradiated.

关键词： polyoxometalate heterogenous catalyst decatungstate photocatalyst

Combination of Lindqvist-type Tungstovanadates and Transition Metal Clusters under Hydrothermal Conditions

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Chinese Journal of Structural Chemistry 2013年第2期32卷 282-288页

作者：李杰刘云马鹏涛 basic experiment teaching center Henan University Institute of Molecular and Crystal Engineering School of Chemistry and Chemical Engineering Henan University

Two novel organic-inorganic heteropolyoxometalate compounds [{Cu（1,10-phen）OH}2]2[V2WaO199]·6H2O （1） and [Co（1,10-phen）3]2[V2WaO19]·5H2O （2）（1,10-phen = 1,10-phenanthroline） were hydrothermally synthesized and characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction. Compound 1 contains a di-V substituted classical Lindqvist-type polyanion [V2W4O19]^4-, two dinuclear copper cations [ {Cu（1,10-phen）OH} 2]^2＋ and six water molecules of crystallization. Two dinuclear copper cations [{Cu（1,10-phen）OH}2]^2＋ con-sist of four transition metal coordination cations {Cu（1,10-phen）}^2＋, bridged by four hydroxyl groups. Meanwhile, both two dinuclear cations are grafted on the Lindqvist polyanion [V2W4O19]^4- through two terminal oxygen （0（9）） and two μ2-0xygen （O（6）） atoms. Such an unusual linking fashion is unique in the polyoxometalate chemistry. The basic framework of 2 is similar to that of 1 and contains one Lindqvist-type polyanion [V2W4O19]^4-, two six-coordinated cobalt cations [Co（1, 10-phen）3]^2＋ and five free water molecules.

关键词： polyoxometalate hydrothermal crystal structure Lindqvist

A New Sandwich Type Transition Metal Substituted Polyoxotungstate under Hydrothermal Conditions: [NH_3(CH_2)_4NH_3]_6[Co_4(H_2O)_2(B-α-GeW_9O_(34))_2]}·7H_2O

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Chinese Journal of Structural Chemistry 2009年第1期28卷 25-28页

作者：韩秋霞刘云李杰王敬平 basic experiment teaching center Henan University Institute of Molecular and Crystal Engineering School of Chemistry and Chemical Engineering Henan University

A new sandwich transition metal substituted polyoxotungstate, [NH3（CH2）4NH3]6[Co4（H2O）2（B-α-GeW9O34）2]}·7H2O 1, was hydrothermaUy synthesized and characterized by IR spectra and single-crystal X-ray diffraction. The single-crystal X-ray analysis reveals that the crystal crystallizes in monoclinic system, space group P21/c with a = 16.6073（6）, b = 15.3333（5）, c = 19.9869（7） A, β = 103.41（1）°, Mr = 5481.38, V = 4950.8（3） A3, Z = 2, Dc = 3.677 g/cm^3, F（000） = 4900, μ（MoKa） = 22.165 mm^-1, GOOF = 1.005, the final R = 0.0228 and wR = 0.0527. The crystal structure indicates that the [Co4（H2O）2（B-α-GeW9O34）2]^12- polyoxoanion contains two trivacant Keggin [B-α-GeW9O34]^10- fragments in a staggered fashion linked via a rhomb-like Co4O16 group in a centrosymmetric arrangement （C2h symmetry） leading to a sandwich-type structure.

关键词： heteropolyanion hydrothermal crystal structure sandwich

A New Bis-(As_3O_6) Capping 6-Molybdonickelate Complex:Preparation and Characterization of [Ni(en)_2(H_2O)]_2[(NiO_6)Mo_6O_(18)(As_3O_3)_2]·2H_2O

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Chinese Journal of Structural Chemistry 2010年第8期29卷 1219-1224页

作者：吴强贺洁韩秋霞杨文华王敬平 Medical School Henan University basic experiment teaching center Henan University Institute of Molecular and Crystal Engineering School of Chemistry and Chemical EngineeringHenan University

A new complex constructed from a unit with two As3O6 rings capping Anderson-type moieties,[Ni（en）2（H2O）2]2[（NiO6）Mo6O18（As3O3）2]·2H2O（1,en = ethylenediamine）,has been hydrothermally synthesized and characterized by IR,single-crystal X-ray diffraction and thermogra-vimetric *** compound crystallizes in triclinic,space group P1 with a = 9.1230（16）,b = 11.8078（9）,c = 12.2111（9） ,α = 114.5210（10）,β = 98.0350（10）,γ = 100.0320（10）o,Mr = 2029.80,C8H44As6Mo6N8Ni3O36,V = 1145.0（2） 3,Dc = 2.944 g/cm3,Z = 1,GOF = 0.997,μ = 7.203 mm-1,F（000） = 970,R = 0.0352 and wR = *** 1 consists of an Anderson-type capped by a two-ring（As3O6） unit [（NiO6）Mo6O18（As3O3）2]4-,two six-coordinate [Ni（en）2（H2O）2]2＋ cations and two water molecules.

关键词： polyoxometalate hydrothermal synthesis crystal structure Anderson-type unit

Sediment record of environmental change at Lake Lop Nur (Xinjiang, NW China) from 13.0 to 5.6 cal ka BP

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Chinese Journal of Oceanology and Limnology 2017年第5期35卷 1070-1078页

作者：汪敬忠贾红娟 experiment & Practice teaching center Heibei GEO University Shifiazhuang 050031 China

Lake Lop Nur is located in the eastern part of the Tarim Basin in Xinjiang,northwestern China.A 220-cm-long sediment core was collected from the center of the ear-shaped depression forming the basin and dated with AMS^(14)*** size,total organic matter(TOC),total nitrogen(TN),and TOC/TN(C/N)analyses were used to reconstruct climatic conditions from 13.0 to 5.6 cal ka *** results showed fi ve main climatic *** I(13.0–11.3 cal ka BP)was a wet–dry environment,whereas Zone II(11.3–8.9 cal ka BP)consisted of a primarily wet *** III(8.9–7.7 cal ka BP)was subdivided into Zone IIIa(8.9–8.2 cal ka BP)that indicated lake constriction and dry climate,and Zone IIIb(8.2–7.7 cal ka BP)in which the proxies indicated wet *** Zone IV(7.7–6.6 cal ka BP),the climate presented a bit wet *** Zone V(6.6–5.6 cal ka BP),abundant glauberite is present in the sediment and silt dominates the lithology;these results indicate the lake shrank and the overall climate was *** environmental events were also identifi ed,including six dry events at 11.0,10.5,9.3,8.6,8.2,and 7.6 cal ka BP and one fl ood event from 7.8 to 7.7 cal ka BP in the Early–Middle Holocene.

关键词： sediment record environmental evolution abrupt environmental changing events Lop Nur northwestern China

Localization and vasopressin regulation of the Na^+-K^+-2Cl^- cotransporter in the distal colonic epithelium

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World Journal of Gastroenterology 2014年第16期20卷 4692-4701页

作者： Hong Xue Zi-Juan Zhang Xiao-Shuang Li Hai-Mei Sun Qian Kang Bo Wu Ya-Xi Wang Wan-Jing Zou De-Shan Zhou Department of Histology and Embryology School of Basic Medical ScienceCapital Medical University experiment teaching center School of Basic Medical ScienceHenan University of Traditional Chinese Medicine

AIM: To investigate whether Na+-K+-2Cl- cotransporter (NKCC2) is expressed in the mouse distal colonic epithelia and whether it is regulated by vasopressin in the colon.

关键词： Na+-K+-2Cl- cotransporter Apical membrane Vasopressin Distal colonic epithelia Trafficking

Crystal Structure of the 1:2 Stoichiometric Nd: [α-SiW_(11)O_(39)]^(8-): K_5Na_5H_3[Nd(α-SiW_(11)O_(39))_2]·6H_2O

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Chinese Journal of Structural Chemistry 2007年第2期26卷 234-238页

作者： HAN Qiu-Xia WANG Jing-Ping NIU Jing-Yang basic experiment teaching center Henan University Kaifeng 475001 China Institute of Molecular and Crystal Engineering School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

Single-crystal X-ray structural analysis of K5Na5H3[Nd（α-SiW11O39）2]·6H2O （triclinic, space group P1^-, a = 13.7738（10）, b = 19.722（2）, c = 20.6647（15） A, α = 111.0090（10）, β = 105.1740（10）, y = 98.6870（10）°, Z = 2, V = 4867.2（8）, Mr = 5914.40, Dc = 4.026,μ = 26.754 mm^-1, F（000） = 5076, R = 0.0750 and wR = 0.2077） reveals that two [α-SiW11O39]^8- moieties are connected through one Nd atom which is in a square antiprismatic coordination environment by eight oxygen atoms from two [α-SiW11O391]^8- moieties. The Nd（Ⅲ） ion is substituted for a [WO]^4＋ unit in the ＂cap＂ region of the tungsten-oxygen framework of the parent Keggin ion. Disordered Na^＋ cations and water molecules reside outside these channels, leaving empty pores with an intersecting slot （13 A × 10 A）.

关键词： crystal structure characterization polyoxometalates

Strong invariance principle for a counterbalanced random walk

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Applied Mathematics(A Journal of Chinese Universities) 2024年第2期39卷 370-380页

作者： TAN Hui-qun HU Zhi-shui DONG Liang International Institute of Finance School of ManagementUniversity of Science and Technology of ChinaHefei 230026China center for basic teaching and experiment Nanjing University of Science and TechnologyJiangyin 214443China

We study a counterbalanced random walkS_(n)=X_(1)+…+X_(n),which is a discrete time non-Markovian process andX_(n) are given recursively as *** n≥2,X_(n) is a new independent sample from some fixed law̸=0 with a fixed probability p,andX_(n)=−X_(v(n))with probability 1−p,where v(n)is a uniform random variable on{1;…;n−1}.We apply martingale method to obtain a strong invariance principle forS_(n).

关键词： random walk martingale invariance principle

pH-responsive Micelles from a Blend of PEG-b-PLA and PLA-b-PDPA Block Copolymers: Core Protection Against Enzymatic Degradation

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Chinese Journal of Polymer Science 2018年第11期36卷 1262-1268页

作者： Yan-Ling Xu Ao-Ting Qu Ru-Jiang Ma Ang Li Zhen-Kun Zhang Zhi-Qiang Shang Yao-Fang Zhang Lu-Xia Bu Ying-Li An State Key Laboratory of Medicinal Chemical Biology Key Laboratory of Functional Polymer Materials of Ministry of Education Institute of Polymer Chemistry Nankai University College of basic Science Chemistry Experiment Teaching Center Tianjin Agricultural University

pH-responsive micelles with a biodegradable PLA core and a mixed PEG/PDPA shell were prepared by self-assembly of poly（ethylene glycol）-b-poly（lactic acid）（PEG-b-PLA） and poly（2-（diisopropylamino）ethyl methacrylate）-b-poly（lactic acid）（PDPA-b- PLA）. The micellization status with different pH and the enzyme degradation behavior were characterized by IH-NMR spectroscopy, dynamic light scattering measurement and zeta potential test. The pH turning point of PDPA block was determined to be in the range of 5.5-7.0. While the pH was above 7.0, the PDPA block collapsed onto the PLA core and could protect the PLA core from invasion of enzyme, as a result, the micelle exhibited a resistance to the enzymatic degradation.

关键词： pH-responsive Enzymatic degradation Poly(lactic acid)