Novel Bis-hydroxymethylation of Imidazole and 2-Methylimidazole

Sincethedevelopmentofsupramolecularchemistrytheheterophaneshavbeenattractinggrowingattentionbecauseoftheirpotentialuseasartificialempesandreceptors,inseif-assembly,innanoscalemachinery,andinprovidinginsightintononcovalentbondinginteractions[1-2].Thoughavarietyofheterophaneswithnovelstructuresandpropenieshavebeenreported,onlyafewarecomposedofinddazole[3-10].4,5-bis(hydroxymethyl)imidazoleanditsderivativesarehighiyimportantintermediatesfortheSynthesisofvariousimidazolophanes,imidazolecrownethers…     

《影像科学与光化学》参考文献格式要求

一.专著作者.书名[M].版本(第1版不著录).出版地:出版单位,出版年.起止页码.示例:[1]Griffiths L.Colour and Constitution of Organic Molecules[M].London:Academic Press,1976.25-32.[2]王德海,江棂.紫外光固化材料理论与应用[M].北京:科学出版社,2001.316-319.Wang D H,Jiang L.Theory and Application of UV-curing Material[M].Beijing:Science Press,2001.316-319.二.期刊作者.文章题名[J].刊名,出版年,卷号(期号):起止页码.示例:[1]Kobayashi C A N,Leite A L,Silva T L,et al.Proteomic analysisof urine in rats chronically exposed to fluoride[J].Journal of Biochemical and Molecular Toxicology,2011,25(1):8-14.     

《影像科学与光化学》参考文献格式要求

一.专著作者.书名[M].版本(第1版不著录).出版地:出版单位,出版年.起止页码.示例:[1]Griffiths L.Colour and Constitution of Organic Molecules[M].London:Academic Press,1976.25-32.[2]王德海,江棂.紫外光固化材料理论与应用[M].北京:科学出版社,2001.316-319.二.期刊作者.文章题名[J].     

《影像科学与光化学》参考文献格式要求

正一.专著作者.书名[M].版本(第1版不著录).出版地:出版单位,出版年.起止页码.示例:[1]Griffiths L.Colour and Constitution of Organic Molecules[M].London:Academic Press,1976.25-32.[2]王德海,江棂.紫外光固化材料理论与应用[M].北京:科学出版社,2001.316-319.Wang D H,Jiang L.Theory and Application of UV-curing Material[M].Beijing:Science Press,2001.316-319.     

《影像科学与光化学》参考文献格式要求

一.专著作者.书名[M].版本(第1版不著录).出版地:出版单位,出版年.起止页码.示例:[1] Griffiths L.Colour and Constitution of Organic Molecules[M].London:Academic Press,1976.25-32.[2]王德海,江棂.紫外光固化材料理论与应用[M].北京:科学出版社,2001.316-319.Wang D H,Jiang L.Theory and Application of UV-curing Material[M].Beijing:Science Press,2001.316-319.二.期刊作者.文章题名[J].刊名,出版年,卷号(期号):起止页码.示例:[1] Kobayashi C A N,Leite A L,Silva T L,et al.Proteomic analysisof urine in rats chronically exposed to fluoride[J].     

Synthesis,Photophysical Properties and TD-DFT Calculation of Fluorescent Dyes Based on Pyrenylthiazoles

Pyrene is one of significant fluorescent material and its fluorescence properties are excellent.It has been widely used for such as OLEDs,DSCs,LMOGs and so on[1-5].What＇s more,pyrene has been successfully applied to signaling the presence of metal ions,nucleic acids,proteins and so on[6-9].Thus,the development of the fluorescent dyes based on pyrene has been a research focus[10-12].However,the synthesis of many pyrene derivatives needed the high-cost coupling reaction such as Heck reaction and Suzuki reaction[1-3,10-12].     

两种稀土镧配合物与大肠杆菌作用的热动力学研究

8-羟基喹啉和水杨酸是常用的消炎灭菌、抗肿瘤药物[1-2].硫代脯氨酸是一种能使癌细胞逐步转化为正常细胞的抗瘤药物[3-5].研究结果表明:稀土和许多生物分子有亲合力,参与重要的生命过程,对多种酶或酶原具有激活或抑制作用,具有明显的抗菌消炎作用和抗肿瘤作用[6-8].     

STUDIES ON GRAFT COPOLYMERIZATION OF DL-LACTIDE ON CORN STARCH AND BIODEGRADABILITY OF THE COPOLYMERS

1.INTRODUCTIONItiswellknownthataliphaticpolyestershaveahighlevelofbiodegradabilityandstarchwasakindoftotallybiodegradablenaturalpolymermaterial[1,2].Thebiodegradabilityofthealiphaticpolyesters/starchgraftcopolymerswereinvestigatedextensively[3-6].Thepresentpaperrelatestoaprocedureforpreparingastarch/D,L-lactidegraftcopolymer,akindofhydrophobic,totallybiodegradableproducthavinggoodwater-resistanceandmechanicalproperties.ThegraftcopolymersweresynthesizedbyreactingD,L-lactidewithcornstarchi…     

《燃料化学学报》参考文献著录格式

参考文献是科技论文的一个重要组成部分,是进行引文统计分析的重要信息源之一。参考文献的质量与数量是评价论文质量和水平的重要指标。参考文献著录的完整性、准确性直接影响统计结果及期刊的文献计量学指标。作者在投稿时不应忽视参考文献特有的价值和作用。因此本刊要求作者必须严格按照下列要求准确、完整地著录参考文献。 各类参考文献格式如下： (1)期刊文章[序号]作者(只列3人,其余用"等").文章题名[J].刊名,出版年,卷(期)：起止页码.例：[2]金显贺,王显长,王忠东,等.一种用于在线检测局部放电的数字滤波技术[J].清华大学学报(自然科学版),1993,33(4)：62～67. (2)专著(书籍)、论文集[序号]作者.书或文集名[M或C].版本(第1版不注).出版地：出版者,出版年.起止页码.例：[1]徐如人,庞文琴,屠昆岗,等.沸石分子筛的结构与合成[M].吉林：吉林大学出版社,1987.131～161. (3)学位论文、报告[序号]作者.论文或报告题名[D或R].保存地点：保存单位,年份.例：[6]张筑生.微分半动力系统的不变集[D].北京：北京大学数学研究所,1983. (4)专著、论文集中的析出文献[序号]作者.析出文献题名[A].见(英文用In)：主编.专著或文集名[M或C].出版地：出版者,出版年.析出文献起止页码.例：[5]陈俊武.流化催化裂化反应工程[A].见：侯祥麟主编.中国炼油技术新进展[M].北京：中国石化出版社,1998.18～26. (5)专利[序号]发明人.专利题名[P].专利国别：专利号,出版日期.例：[3]姜锡洲.一种温热外敷药制备方案[P].中国专利：881056073,1989-07-26. (6)国际、国家标准[序号]标准编号,标准名称[S].例：[4]GB/T 16159-1996,汉语拼音正词法基本规则[S]. (7)电子文献[序号]主要责任者.电子文献题名[电子文献及载体类型标识].电子文献的出处或可获得地址,发表或更新日期/引用日期(任选).例：[7]万锦堃.中国大学学报论文文摘(1983～1993).英文版[DB/CD].北京：中国大百科全书出版社,1996. [8]王明亮.关于中国学术期刊标准化数据库系统工程的进展[EB/OL].http：∥www.cajcd.edu.cn/pub/wml.txt/980810-2.html,1998-08-16/1998-10-04. (8)各种未定义类型的文献[序号]主要责任者.文献题名[Z].出版地：出版者,出版年.     

《影像科学与光化学》参考文献格式要求

一.专著作者.书名[M].版本(第1版不著录).出版地:出版单位,出版年.起止页码.示例:[1]Griffiths L.Colour and Constitution of Organic Molecules[M].London:Academic Press,1976.25-32.[2]王德海,江棂.紫外光固化材料理论与应用[M].北京:科学出版社,2001.316-319.     

Synthesis of chlorobis/β-diketonato/oxotechnetium/V/ and tris/β-diketonato/technetium/III/ complexes

Chlorobis/-diketonato/ oxotechnetium/V/ complexes [TcOCl/-dik/₂, -diketone=acetylacetone, benzoylacetone and dibenzoylmethane] were newly synthesized using macroamount of⁹⁹Tc. These complexes were further separated into geometrical isomers. Furthermore, an improvement of the yields for the syntheses of tris/-dike-tonato/technetium/III/ complexes [Tc/-dik/₃, -diketone=acetylacetone, benzoylacetone and 2-thenoyltrifluoroacetone] was examined using Tc/III/-thiourea complexes as a starting material.     

Solvent extraction separation of In/III/-Tl/III/ and Hg/II/-Cd/II/-Co/II/ with sulphoxides

Solvent extraction studies have been made on some metals: In/III/-Tl/III/ and Hg/II/-Cd/II/-Co/II/, from ammonium thiocyanate solutions by dialkyl sulphoxides. Separation of these metals from one another can be achieved by suitable choice of the extracted conditions. The nature of the extractable metal species has been elucidated.     

Separation of Tl/III/ from Tl/I/

A method for the separation of Tl/III/from Tl/I/ is reported employing 1-/2-pyridylazo/-2-naphthol /PAN/ and Rhodamine-B as extracting agents.     

An investigation of the promotional effect of propylene or propane traces on the activity of sulfatedPt/g-Al2O3andPt-Sn/g-Al2O3inCH4combustion

Summary A strong promoting effect of the presence of C₃H₈or C₃H₆was determined for the combustion of CH₄in excess oxygen, over pre-sulfated 1%Pt/g-Al₂O₃and pre-sulfated 1%Pt-2%Sn/g-Al₂O₃catalysts.</o:p>     

LixZryOz三元化合物的制备及表征

采用高温固相法制备了4种高纯度晶相组成的LixZryOz三元化合物,研究了焙烧温度、时间、反应物的种类和初始反应物物质的量比对产物组成的影响,进一步用XRD、SEM及BET分析方法对产物的晶相结构、表面形貌及比表面积进行了表征.实验结果表明,Li2CO3与ZrO2在适当条件下可以合成得到单斜相Li3ZrO3;以LiOH替代Li2CO3,在适当条件下可以分别合成得到四方相Li2ZrO3和三斜/单斜相Li6Zr2O7;进一步以Zr(NO3)4·5H2O代替Zr02,可将单斜相Li6Zr2O7的制备时间由96 h缩短至24 h.SEM照片显示产物硬团聚明显,粒径分布在1～10μm间,BET分析表明样品比表面积处于1.0～9.0 m2·g-1间分布,反应过程中锂的过量以及长时间高温焙烧是引起产物粒径长大和产生硬团聚的主要原因.     

Analysis of nonvalent interactions in the crystals of conformational polymorphs of the composition CaHbNcOdSe by means of molecular voronoi-dirichlet polyhedra

Nonvalent interactions in crystals of compounds of the composition C _a H _b N _c O _d S _e that exhibit conformational polymorphism and have no fewer than four structurally characterized modifications are analyzed using molecular Voronoi-Dirichlet polyhedrals. A unique combination of the types of occurring intra- and intermolecular nonvalent contacts is shown to correspond to each conformational polymorph. Nonvalent interactions involving hydrogen atoms are found to occur most often in crystal structures, and least often those involving S, N, and O atoms.     

LixNi0.8-yCo0.2ZnyOp的合成及电化学性能研究

A series of single-phase Li_xNi_0.8-yCo_0.2Zn_yO_p(0.96 ≤x≤ 1.10， 0 ≤y≤ 0.05， 2 ≤p≤ 2(1+y) ) (different in the y values) were synthesized by a two-step solid state reaction method， in which LiOH·H₂O， Zn-doped spherical Ni(OH)₂ and Co₂O₃ were used as the precursors. The ICP-AES analyses proved that the Zn-doped compounds synthesized had the nonstoichiometric form. The results of the XRD， SEM identified that the uniform particles of the as-prepared materials having a good layered structure were fine， narrowly distributed and well crystallized. The electrochemical performance test was carried out and the results showed that the as-prepared Zn-doped materials had not only a high capacity， but also a better cycling stability characterization than the un-doped one. The Li_1.06Ni_0.75Co_0.22Zn_0.03O_2.03 material has an initial reversible capacity as high as 160.5mAh·g^-1; and a first discharge efficiency 89.2%， and exhibits satisfactory cyclic stability with 90% retainable capacity after 50 cycles.     

Crystal structure of Na3PO4 · 12H2O

The crystal structure of trisodium monophosphate hemihydrate was determined. The space group is $\text{C2}\text{c}$ and a unit cell contains eight formula units. The unit cell dimensions of $\text{Na}{}_3\text{PO}{}_4\text{·}\text{1}\text{2}\text{H}{}_2\text{O}$ are a = 9.631(3), b = 5.416(2), c = 16.938(8) Å, β = 102.60(5)°. The final R value is 0.027 for a set of 1430 independent reflections. This atomic arrangement is mainly a three-dimensional network of distorted NaO₆ octahedra. The hydrogen bonding scheme is given.     

橙红色荧光粉Ca_(1-x-y)Sm_xBi_ySiO_3的制备及其发光性能

以Sm3+作为激活剂,Bi3+作为辅助激活剂,采用水热法合成Ca1-x-ySmxBiySi O3前驱体,然后在1 100℃焙烧得到系列橙红色荧光粉。用X-射线衍射仪、扫描电镜和荧光分光光度计和傅里叶变换红外光谱等手段对样品的组成、结构和形貌及其发光性质进行分析和表征。分析结果表明:产物都为三斜晶系结构的Ca1-x-ySmxBiySi O3和四方结构的方石英Si O2共熔体。在405 nm近紫外光激发下,产物的发射光谱由3个峰组成,发射峰值位于566、606和650 nm处,分别归属于Sm3+的4G5/2→6HJ/2(J=5,7,9)跃迁。产物的激发光谱在405 nm有很强的发射带,与近紫外LED芯片匹配。随着Sm3+掺量的增加,样品发光强度先增强后减弱,当Sm3+的物质的量分数为3%时发光强度达到最大,浓度猝灭机理为电偶极-电偶极相互作用。当Bi3+的物质的量分数在0.3%~1.5%时,对产物Ca0.97Sm0.03Si O3的荧光强度起敏化作用。Sm3+和Bi3+的最佳物质的量分数分别为3%和0.5%。     

Isotope exchange behaviour of bis/diethyldithiocarbamate/mercury/II/ complex

Isotope exchange behaviour of bis/diethyldithiocarbamate/mercury/II/ complex has been studied at 25°C and 45°C varying the concentrations of both metal ion and the complex. The results show that the complex is kinetically labile. Temperature has a significant effect on the rate of the reaction. Increase in concentration increases the reaction rate.