共轭聚合物／C60复合体系及其在光伏打电池中的应用

共轭聚合物／C60复合体系在有机太阳能电池中的应用引起了化学工作者的广泛兴趣。本文介绍了共轭聚合物／C60复合体系的光诱导电子转移，以及近年来该体系在光伏打电池中的研究进展。     

2-丙酮氧基-3,4-二氟硝基苯的合成工艺改进

2 ,3,4 三氟硝基苯在氢氧化钾溶液中水解生成酚钾 ,在碘化钾作用下 ,酚钾与一氯丙酮缩合生成 2 丙酮氧基 3,4 二氟硝基苯 (Ⅰ )。在原料量比为n(三氟硝基苯 )∶n(一氯丙酮 )∶n(碘化钾 ) =1.0 0∶1 2 5∶0 0 6 ,缩合反应温度 5 5℃的条件下 ,产品收率达 70 2 % ,w(Ⅰ ) =97 5 % ,该工艺避免了旧工艺需使用盐酸和碳酸钾的缺点 ,成本较低 ,适于工业生产。     

Characterization of the adipose tissue atrophy induced by peroxisome proliferators in mice

In the present study, we characterized the effects of peroxisome proliferators (PP) on adipose tissue in mice. Treatment with potent PP, such as perfluorooctanoic acid (PFOA), 2-methyl-2-(p(1,2,3,4-tetrahydroxy-naphthyl)-phenoxy)propionic acid, (4-chloro-6-(2,3-xylidino)2-pyrimidinylthio) acetic acid, and di(2-ethylhexyl)phthalate, caused dramatic decreases in adipose tissue weight, whereas the moderately potent PP, acetylsalicylic acid, had a relatively weak effect. This decrease in weight reflects a loss of fat from adipocytes rather than a loss of cells, as demonstrated by constant DNA content. The dose-dependency and time-course experiments indicate that peroxisome proliferation occurs simultaneously with or prior to adipose tissue atrophy. Thus, hepatic peroxisome proliferation might result in the increased mobilization of lipids and lipid utilization in liver. The enhanced adipose tissue hormonesensitive lipase (HSL) activity and down-regulated lipoprotein lipase (LPL) activity observed upon PP treatment might, at least in part, explain the loss of fat via increase FA release from adipocytes and/or decreased FA uptake from the circulation, respectively. In addition, the possible involvement of the increased tumor necrosis factor α expression found upon PFOA treatment in reducing the insulin sensitivity of adipose tissue and thereby altering LPL and HSL activities is discussed.     

溴酚蓝-丁基罗丹明B双显色高灵敏体系测定废水中镉的研究

镉是一种高毒而且具有蓄积性的重金属 ,在环境中含量较低 ,需要灵敏的监测技术进行测定。研究了双显色体系测定镉的方法 ,对于Cd -邻二氮菲 -溴酚蓝形成的三元络合体系 ,首先用三氯甲烷萃取 ,然后加入碳酸钠解析 ,解析出来的溴酚蓝可与丁基罗丹明B形成染料离子对 ,该离子对被甲苯萃取 ,并用乙醇等色。在 5 89nm测定溴酚蓝 -丁基罗丹明B等色染料离子对的吸光度 ,该方法摩尔吸光系数可达到 4 .0 8× 10 5L/(mol·cm) ,在 6 .0× 10 -8～ 3.1× 10 -5mol/L范围内服从比尔定律 ,样品标准加入回收率为 98.0 %～ 10 1.8% ,相对标准偏差为3.2 % ,利用该高灵敏度体系测定了三个化工废水样品的镉 ,结果令人满意。     

蒲葵根中脂肪油的GC-MS联用分析

采用GC—MS联用技术首次分析了蒲葵根中脂肪油的组成，共分离出36个峰，并鉴定出其中的23种化合物。该脂肪油的主要成分为月桂酸乙酯、十六烷酸乙酯、亚麻酸、亚油酸乙酯、9—十八碳烯酸乙酯等。为蒲葵根资源的开发利用提供了科学依据。     

合理选择裂隙岩体注浆方法的判据研究

根据弹性变形理论分析了巷道围岩裂隙开度在注浆过程中增大和恢复的机理 ,提出了采用稀水泥浆液注浆时 ,选择常量法和常压法的判断准则 ,给出了使用该判据选择合理注浆方法的步骤     

气相色谱法测定生活饮用水中的挥发酚

本实验以气相色谱法同时测定水质中较具代表性的挥发酚：苯酚、间甲苯酚、2，4-二氯苯酚，取得了满意的结果。     

我国氯碱工业新时期的发展特点

在分析了国际、国内经济形势的基础上，提出了我国氯碱行业的发展趋势，即结构调整向大规模，集约化发展；企业改制转制向投资多元化发展，产品结构要实现氯碱平衡、大力发展聚氯乙烯及氯碱的下游精细化工产品。强调指出要建立氯碱行业物流中心，并重视环境保护?建议有条件的企业推行热电与碱联产，实现企业发展。     

Effect of TeO2 on Near‐Infrared Emission from Bismuth Centers in Borogermanate Glasses

Bi‐doped xTeO₂–(60?x)GeO₂–15B₂O₃–20MgO–5Al₂O₃ glasses were prepared by the conventional melt‐quenching method and their absorption and fluorescence spectra were characterized. Broadband near‐infrared (NIR) emission from Bi centers centered around 1240 nm with a full width at half maximum (FWHM) of 250 nm was observed, and the position of the emission peak strongly depends on the excitation wavelength. Increasing TeO₂ concentration results in the strong coloration of the glass, leading to the reduction and finally, complete quenching of the NIR emission. Based on Raman, X‐ray photoelectron spectroscopy and transmission microscopy observation, the coloration of the glass at high TeO₂ concentration can be ascribed to the precipitation of elemental Te nanoparticles of around 3–8 nm, which effectively suppresses the NIR emission by reabsorption. The precipitation of Te nanoparticles in an oxide glass may find novel applications in photonics and relevant fields.     

2-乙基-1,3-氧硫杂环戊烷的合成

以对甲苯磺酸为催化剂 ,巯基乙醇与丙醛 (摩尔比 1∶ 1 .1 )在苯中共沸脱水 ,合成目标产物2 -乙基 - 1 ,3-氧硫杂环戊烷。产物产率为 91 % ,质量分数为 96%。经红外光谱、色 -质联用和核磁共振谱检测 ,确证了产物结构。此方法简便易行 ,产率较高