新型聚2,4-二乙烯基3-十二烷基噻吩-1,3,4-噁二唑交替共聚物的合成、表征及性能研究

采用Heck偶合法首次合成了新型的含有空穴传输单元3-十二烷基噻吩和电子传输单元1,3,4-噁二唑的低带隙能的聚2,4-二乙烯基-3-十二烷基噻吩-1,3,4-噁二唑共轭聚合物(P3DDTV-OXD).并且通过1H-NMR、FT-IR、凝胶色谱(GPC)、UV-vis光谱、荧光光谱(PL)、循环伏安(CV)法对所合成的共聚物进行了分析表征.与规整的聚3-十二烷基噻吩均聚物(P3DDT)相比,共聚物的UV最大吸收波长和Pl最大发射波长明显蓝移,具有强烈的蓝色荧光,且电子亲和势较高,同时拥有空穴和电子传输能力,实现了电荷在分子内的双向传输.     

聚烷基噻吩嵌段共聚物合成及自组装的研究进展

立构规整性聚烷基噻吩具有很好的光电特性及很高的溶解度等优点,使得该材料被应用于有机场效应晶体管、化学传感器及光伏太阳能电池等领域。介绍了立构规整性聚烷基噻吩均聚物及其棒杆-线团、棒杆-棒杆型嵌段共聚物的合成及自组装行为的研究进展,并对聚烷基噻吩嵌段共聚物的发展前景进行了展望。     

聚3-烷基噻吩系列物的合成与表征

采用Fe(III)催化剂合成法合成聚3-丁基噻吩(P3BT)、聚3-己基噻吩(P3HT)和聚3-十二烷基噻吩(P3DDT)。用GPC和1 H-NMR对所合成的聚合物的相对分子质量和结构进行表征,用SEM对所合成的聚合物的表面形貌进行观察,并用紫外-可见吸收光谱和荧光光谱研究3种聚合物氯仿溶液的光学性能。结果表明,用该方法合成的聚合物以非晶态形式存在;具有较高的相对分子质量;在氯仿溶液中,P3BT、P3HT、P3DDT的最大吸收峰分别为:436nm、437nm和430nm,最大发射峰分别为570.0nm、581.2nm和573.8nm。综合分析发现P3HT更适于用做聚合物太阳能电池材料。     

两种新型D/A型聚噻吩衍生物的合成、定性和光学性能

采用Heck偶联法和三氯化铁氧化还原聚合法合成了两种新型的D/A-PTh衍生物,聚(3-(2-(4叔丁基笨基)-5-(4乙烯苯基)-1,3,4-惡二唑))噻吩(P3OXDT)和聚(3-辛-4-(2-(4-叔丁基笨基)-5-(4-乙烯苯基)-1,3,4-惡二唑))-聚3-辛噻吩(P3O40XDT-P30T)共聚物,它们都...     

电子受体材料功能化还原氧化石墨烯的结构和光学性能

采用Hummers法制备氧化石墨烯(GO),利用水热法对GO分别还原5 h和10 h制得两种还原氧化石墨烯(5-RGO和10-RGO),进一步用异氰酸苯酯对还原前后的氧化石墨烯材料进行改性,即得功能化氧化石墨烯和功能化还原氧化石墨烯(SPFGO、5-SPFRGO和10-SPFRGO)。以功能化还原氧化石墨烯材料为电子受体,聚3-己基噻吩(P3HT)为电子给体,制备复合膜。结果表明:GO由3-5层组成,经水热还原后样品表面仍含有—CO,—COOH等含氧官能团;功能化后石墨烯在邻二氯苯中分散性良好,与P3HT能级相匹配,满足作为聚合物太阳能电池受体材料要求;以5-SPFRGO做为受体材料与P3HT复合制备的复合膜表面规整致密,光吸收强度高,荧光光谱强度低,性能最优。     

RAFT聚合制备嵌段聚合物对PP基材涂料附着力的改善

合成了RAFT试剂S-1-十二烷基-S’-(α,α’-二甲基-α"-乙酸)三硫代碳酸酯(DDAATB),并以此种RAFT试剂为链转移剂制备聚丙烯酸均聚物,再以此均聚物为大分子链转移剂,制备了聚丙烯酸-b-聚丙烯酸异冰片酯嵌段共聚物(PAA-b-PIBOA)。以制备的丙烯酸酯嵌段共聚物作为附着力促进剂,与UV树脂复配成UV涂料,考察了添加不同质量分数嵌段共聚物的涂料对PP基材的附着能力的改善,并与CPP进行了比较。研究结果表明,制备的丙烯酸酯嵌段共聚物可有效提高涂层对PP基材的粘附性,PIBOA链段分子量越大,效果越明显;将制备的PAA-b-PIBOA为附着力促进剂,分别添加至以聚酯丙烯酸酯、氯化聚醚为主体树脂的涂料配方中,通过附着力性能测试,发现合成的嵌段共聚物PAA-b-PIBOA能有效提高涂层对PP基材的附着力。     

利用Heck反应制备3-甲基噻吩与芴的嵌段共聚物及其性能

采用Heck反应合成了3-甲基噻吩齐聚物及3-甲基噻吩与芴的交替和嵌段共聚物。用凝胶渗透色谱（GPC）、核磁共振谱（1H-NMR）、紫外-可见光谱和荧光光谱对所得聚合物进行了表征。结果表明,利用Heck反应成功地制备了上述聚合物。在溶液和薄膜状态下嵌段共聚物与交替共聚物的最大紫外吸收峰分别为414 nm、394 nm和...     

噻吩类电致发光材料的能级结构及光电性能研究

用循环伏安法测试了一系列噻吩类聚合物和单体的氧化还原电位,确定了系列化合物的能级结构,比较了主链上不同取代基团及形成共聚物对聚合物能级和光电性能的影响,为高性能发光器件的制作提供了依据.结果表明,随着噻吩环3位取代烷基碳链的增长,单体带隙减小;形成聚合物有利于降低带隙;通过共聚方式引入聚合物主链的噁二唑吸电子基团可以改进其电子传输性能.     

苯并三氮唑与噻吩交替共聚物的合成及性能研究

以4,7-二溴-2-十二烷基-1,2,3-苯并三氮唑和带不同碳数烷基的3-烷基噻吩格式试剂为单体,通过Ni(Ⅱ)配合物催化法分别合成了带有丁基、辛基和十二烷基侧链的共聚物,并采用FT-IR、1H-NMR对其化学结构进行了表征。所得共聚物的M n分别为0.57×104,0.59×104和0.49×104g/mol,其M w(g/mol)分别为1.25×104,1.24×104和0.96×104g/mol。所得共聚物在CHCl3、THF等溶剂中具有较好的溶解和成膜性。聚合物在CHCl3溶液中的紫外-可见最大吸收波长分别为433,432和415 nm,共聚物在固态薄膜状态下的紫外-可见最大吸收波长与溶液比较约红移8nm。3种共聚物表现出较好的荧光性能。     

取代烷基对聚噻吩的热,色性能的影响

ＤＳＣ数据表明烷基取代的聚噻吩的熔点取代烷基中碳原子数增加而降低。聚（３－烷基噻吩）及其与乙烯－醋酸乙烯酯共聚物的共混物的ＵＶ吸收峰与侧链长度、浓度及温度有关。层状结构的形成与聚合物主链的棒一级转化是产生“热色”及“溶剂化显色”的原因。     

p,V, T and derived thermodynamic data for toluene,trichloromethane, dichloromethane,acetonitrile, aniline,and n-dodecane

Experimentally determined p,V,T data are reported for toluene, trichloromethane, dichloromethane, acetonitrile, aniline, and n-dodecane at 278, 288, 298, 313, and 323 K, except for dichloromethane, for which the highest temperature was 298 K. At each temperature, measurements were done at pressures up to about 280 MPa or (for aniline and n-dodecane) at a lower pressure slightly below the freezing pressure at the temperature of measurement. Values of the isobaric expansivity isothermal compressibility and (for toluene, trichloromethane, dichloromethane, and acetonitrile) internal pressure, derived from the p,V,T data, are presented.     

微波消解-ICP-AES法测定茶叶中钾、钠、磷、硫、铁、锰、铜、锌、钙、镁方法研究

通过优化微波消解条件,并根据不同元素性质,调谐ICP-AES工作条件至最佳,实现了茶叶中K、Na、P、S以及Fe、Mn、Cu、Zn、Ca、Mg 10种元素的同时测定。10种元素测定结果 RSD%为0.67(Cu)～5.57(Na),回收率为84.0%(Na)～101.5%(Fe),检出限为0.001(Mn)～0.029(S)μg·g-1,表明该方法准确可靠,能够满足茶叶中K、Na、P、S、Fe、Mn、Cu、Zn、Ca、Mg分析要求。     

Optical properties of the metals Al, Co, Cu, Au, Fe, Pb, Ni, Pd, Pt, Ag, Ti, and W in the infrared and far infrared

Infrared optical constants collected from the literature are tabulated. The data for the noble metals and Al, Pb, and W can be reasonably fit using the Drude model. It is shown that -epsilon1(omega) = epsilon2(omega) approximately omega(2)(p)/(2omega(2)(tau)) at the damping frequency omega = omega(tau). Also -epsilon1(omega(tau)) approximately - (1/2) epsilon1(0), where the plasma frequency is omega(p).     

Dry Autoclaving for the Nanofabrication of Sulfides,Selenides, Borides,Phosphides, Nitrides,Carbides, and Oxides

This review compiles various nanostructures fabricated by a distinct “dry autoclaving” approach, where the chemical reactions are carried out without solvents; above the dissociation temperature of the chemical precursor(s) at elevated temperature in a closed reactor. The diversity to fabricate carbides (SiC, Mo₂C, WC), oxides (VOx‐C, ZnO, Eu₂O₃, Fe₃O₄, MoO₂), hexaborides (LaB₆, CeB₆, NdB₆, SmB₆, EuB₆, GdB₆), nitrides (TiN, NbN, TaN), phosphides (PtP₂, WP), sulfides (ZnS, FeS/C, SnS/C, WS₂, WS₂/C), and selenides (Zn_1‐xMn_xSe/C, Cd_1‐xMn_xSe/C), with various shapes and sizes is accounted with plausible applications. This unique single‐step, solvent‐free synthetic process opens up a new route in the growing nanomaterials science; owing to its considerable advantages on the existing approaches.     

抓管理重服务求可靠要效益--记广西计量测试研究所国家实验室认可工作

我所2001年9月份顺利地通过了中国实验室认可委紧张而严格的评审,得到了权威机构认可,成为西南地区较早通过国家实验室认可的省级计量校准机构.在建立质量体系、运行质量体系走过了艰辛之路,我们将全所职工的艰辛之路介绍给大家,希望能给将要申请认可的实验室得以参考.     

标准·质量·认证·会议(英文)

Standards IGRS:First Complete International Standards System in 3C Collaboration Field After ISO and IEC released three international standards of Intelligent Grouping and Resource Sharing (IGRS) including Core Protocol,File Communication Framework and Device Validation,four standards of IGRS,Application Framework,Basic Application,Service Types and Devices Types,got approved with high passing rate in the voting of Final Draft International Standard (FDIS) and will be officially issued soon around the world. It symbolizes that all     

Powder X-Ray Reference Patterns of Sr2RGaCu2Oy (R = Pr,Nd, Sm,Eu, Gd,Dy, Ho,Er, Tm,and Y)

X-Ray Rietveld refinements were conducted on a series of eleven lanthanide phases, Sr₂RGaCu₂O_y (2112 phase, R = Pr, Nd, Sm, Eu, Gd, Dy, Ho, Y, Er, Tm, and Yb) that are structurally related to the high T_c superconductor Ba₂YCu₃O₇ (213). In the 2112 structure, instead of square planar Cu-O chains, tetrahedral GaO4 chains were found to run in a zig-zag fashion along the diagonal of the basal 213 ab-direction. Reference powder patterns for these compounds were prepared by using the Rietveld decomposition technique. The unit cell volume of these compounds follows the expected trend of the lanthanide contraction. The lattice parameters range from a = 22.9694(3) Å, b = 5.5587(2) Å, and c = 5.44743(7) Å for R = Pr, to a = 22.8059(2) Å, b = 5.46031(5) Å, and c = 5.37773(5) Å for R = Yb. An electon diffraction study of the Sm- and Er-analogs showed characteristic diffuse streaks along the b-axis, suggesting some disorder within the GaO₄ chains.