Geometry of skew information-based quantum coherence

We study the skew information-based coherence of quantum states and derive explicit formulas for Werner states and isotropic states in a set of autotensors of mutually unbiased bases (MUBs). We also give surfaces of skew information-based coherence for Bell-diagonal states and a special class of X states in both computational basis and in MUBs. Moreover, we depict the surfaces of the skew information-based coherence for Bell-diagonal states under various types of local nondissipative quantum channels. The results show similar as well as different features compared with relative entropy of coherence and l₁ norm of coherence.     

三水合氯化镨与18C6在乙醇中的配位行为及配合物的合成与表征

采用半微量相平衡方法研究了ＰｒＣｌ_３·３Ｈ_２Ｏ－１８Ｃ６－Ｃ_２Ｈ_５ＯＨ三元体系在２５℃的溶解度，测定了各饱和溶液的折光率。在该体系中有三种比学计量的配合物形成，其化学组成为：２ＰｒＣｌ_３·１８Ｃ６·６Ｈ_２Ｏ·Ｃ_２Ｈ_５ＯＨ、４ＰｒＣｌ_３·３（１８Ｃ６）·１２Ｈ_２Ｏ和ＰｒＣｌ_３·１８Ｃ６·３Ｈ_２Ｏ，依据相平衡结果，合成了三种固态配合物，利用化学分析、ＩＲ、ＴＧ、ＤＴＧ、ＤＳＣ及电导研究了配合物的组成和性质。     

Synthesis and Crystal Structure of a Novel Layered Lead(Ⅱ) Carboxylate-sulfonate Compound Templated by 4,4''-Bipyridine

A new lead(Ⅱ) carboxylate-sulfonate has been hydrothermally synthesized and characterized by X-ray single-crystal and elemental analyses. It crystallizes in triclinic, space group P,(1) with a=8.1573(6), b=9.4663(7), c=12.7488(9) (A), α=89.2320(10), β=80.7380(10), γ=77.9760(10)°, Z=2, V=950.10(12) (A)3, Mr=599.57, Dc=2.096 g/cm3, μ=9.032 mm-1, F(000)=572, the final R=0.0412 and wR=0.1035. It has a 1D chain structure, and the Pb(Ⅱ) is six-coordinated. Two PbO6 polyhedra are interconnected via edge-sharing into a two-core unit. Such units are further interconnected by 3-sulfonato-benzoic acids into 1D chains which are linked by hydrogen bonds into a layer structure. The 4,4'-bipyridines are located at the interlayer space and link the layers into a supramolecular structure by π-π stacking interactions.     

高比表面CexTi1-xO2催化剂的结构表征及其HCl催化氧化性能

以硝酸铈,硫酸钛为前驱体,用氨水共沉淀法制备了一系列CexTi1-xO2催化剂.利用XRD、Raman、N2吸附-脱附、H2-TPR对催化剂进行了表征并考察了其催化HCl氧化制Cl2的性能.结果表明:复合氧化物较CeO2和TiO2更加分散甚至高度弥散,大大增加了其比表面积,最高可达170.5 m2·g-1,同时CeO2与TiO2之间的相互作用显著提高了其可还原氧物种数目,改善了其氧化还原性能.催化反应结果表明,复合氧化物的活性较CeO2和TiO2显著提升,Ce0.1Ti0.9O2表现出了良好的氯化氢催化氧化能力和较好的催化稳定性,在430℃时氯气产率可以达到0.90 gCl2·gcat-1·h-1,反应60 h后,氯气产率稳定在0.76 gCl2·gcat-1·h-1.     

油脂类食品中脂肪酸单氯丙醇单酯和双酯的分离测定

建立了食品中脂肪酸单氯丙醇单酯与双酯含量的测定方法。称取0.1 g的油脂样品,加入内标后,转入氨基固相萃取柱,先以6.0 mL正己烷洗脱脂肪酸单氯丙醇双酯(MCPD双酯),再以6.0 mL正己烷-乙酸乙酯混合溶剂洗脱脂肪酸单氯丙醇单酯(MCPD单酯),分别收集洗脱液并浓缩至近干,残余物经甲醇钠水解和苯基硼酸(PBA)衍生后,供气相色谱/质谱(GC-MS)分析。MCPD单酯、MCPD双酯的检出限在83~142μg/kg(均以MCPD计)之间,线性范围为25~500μg/L(R2>0.9990)。以花生油和婴幼儿奶粉脂肪提取物为基质,在250~1000μg/kg范围内进行3种浓度水平的加标回收实验,MCPD单酯与双酯的回收率在86.5%~104.0%之间,相对标准偏差(RSD)为2.4%~13.2%(n=6)。此外,本方法成功应用于市售食用植物油和婴幼儿奶粉中MCPD单、双酯的污染调查。     

Water-soluble Porphyrin as Temperature Sensor Based on Fluorescent Enhancement

A novel water-soluble porphyrin[5,10,15,20-tetra（3-ethoxy-4-hydroxy-5-sulfonate）phenyl porphyrin, H2TEHPPS] was designed and synthesized, which could be used as a potential fluorescence sensor to detect temperature changes. The studies were performed in solution phase and the concentration of H2TEHPPS was 2.0×10^-5 mol/L. The optical properties of H2TEHPPS were investigated based on the UV and fluorescence spectra. The results show that the fluorescence intensity of H2TEHPPS is directly proportional to temperature in the range of 293-353 K So H,TEHPPS can be used as a molecular temoerature sensor in biomedical and other fields.     

非晶态MnO_x/TiO_2催化剂的制备及其低温NH_3-SCR性能

采用自发沉积法、共沉淀法及浸渍法制备MnO_x/TiO_2催化剂,通过XRD、TEM、N2吸附-脱附、XPS、H_2-TPR、NH_3-TPD等一系列表征手段研究MnO_x/TiO_2催化剂的结构与性质,并考察MnO_x/TiO_2催化剂低温NH_3-SCR性能。结果表明,自发沉积法制备的MnO_x/Ti O2(s)催化剂具有完全非晶态结构,Mn和Ti之间存在强相互作用,较共沉淀法制备的MnO_x/TiO_2(c)及浸渍法制备的MnO_x/Ti O2(i)表现出更强的氧化还原能力。MnO_x/TiO_2(s)具有较高的比表面积、较多的表面酸量,有利于NH_3的吸附与活化。且表面高浓度的Mn4+离子及吸附氧,有利于将NO氧化为NO2,促进发生"fast-SCR"反应,进而使其表现出优异的低温脱硝性能。MnO_x/TiO_2(s)催化剂在150℃时NO的转化率高达92.8%,在150-350℃NO的转化率保持在90%以上,此外其还具备较强的抗H_2O和SO_2毒化能力。     

化学修饰超高交联吸附树脂对水中四环素的吸附研究

本文采用偏苯三酸酐修饰的超高交联吸附树脂(TMAMR)和羟丙基纤维素修饰的超高交联吸附树脂(HPCMR)作为吸附剂,以NDA150树脂作对照,研究了3种树脂对水中四环素的吸附性能和吸附机理,同时考察了p H值和Na+浓度对TMAMR和HPCMR树脂吸附四环素的影响。结果表明,TMAMR和HPCMR树脂的比表面积较高,树脂表面修饰了大量的羟基,对四环素均具有较好的吸附性能。3种树脂对四环素的吸附量均随着温度的升高而增大,吸附过程中同时存在较强的物理吸附和化学吸附作用。Langmuir和Freundlich等温吸附方程均能够较好地拟合吸附等温线,吸附机理较复杂。吸附热力学结果表明,四环素在3种树脂上的吸附为自发的吸热过程,且吸附过程的熵增加。p H值对TMAMR和HPCMR树脂吸附四环素有较大的影响,在中性条件下,树脂对四环素的吸附量最大,在强酸和强碱条件下树脂的吸附量均较低。吸附液中加入无机盐后,发生盐析作用,导致TMAMR和HPCMR树脂对四环素的吸附量增大。     

含噻唑、硫醚结构的1,2,4-三唑类化合物的合成及生物活性

以三氟乙酰乙酸乙酯、磺酰氯、水合肼、异硫氰酸苯酯、碘代芳烃、氯乙酸等为原料,设计、合成了7种新型的含噻唑环、硫醚和三氟甲基的1,2,4-三氮唑类化合物,通过¹H NMR、¹³C NMR、¹⁹F NMR和MS等技术手段对新化合物进行了结构表征。 杀菌活性测试表明,化合物6b、6d和6g在浓度为100 mg/L时对纹枯病菌(Rhizoctoniasolani)的抑制率分别为91%、92%和93%。     

亚微米级四方相钛酸钡低温固相法制备及晶型控制

以八水合氢氧化钡和α-钛酸为原料,在相对低的焙烧温度下,制备出近似球形、亚微米级的钛酸钡。通过XRD、SEM、Raman和FTIR等手段对钛酸钡样品进行表征,样品具有高结晶度,颗粒均一性良好。晶型转变的初步探究表明,立方相为主的钛酸钡可以在400℃发生晶相转变,成为以四方相为主的钛酸钡。