One‐Step Electrodeposition to Layer‐by‐Layer Graphene–Conducting‐Polymer Hybrid Films

One‐step fabrication of graphene–polyaniline (graphene–PANI) hybrid film was facilely achieved by cyclic voltammetric electrolysis of a bath containing both graphene oxide (GO) and aniline, where graphene is obtained by electrochemical reduction of GO and PANI is simultaneously obtained by aniline electropolymerization. As there is no strong attraction between aniline and GO under the electrodeposition conditions, the independent depositions of PANI and reduced GO nanosheets at their greatly differed potentials led to alternate layered graphene–PANI films, with the topmost layer being PANI particles or graphene sheets just by changing the initial scan directions. The two kinds of graphene–PANI hybrid films present excellent but different electrical and electrochemical behaviors.     

Manganese mercury thio­cyanate (MMTC) glycol mono­methyl ether

In the title complex, [MnHg(NCS)₄(C₃H₈O₂)]_n, each Hg atom is tetrahedrally coordinated with four S atoms of the SCN^? ions, and each Mn atom is octahedrally coordinated with four N atoms of the SCN^? ions, one hydroxyl O atom and one ethereal O atom of the glycol mono­methyl ether mol­ecule. Each pair of Hg and Mn atoms is bridged by one SCN^? ion. A 24‐membered Mn₃Hg₃(SCN)₆ ring is formed as the strucrural unit, with the six metal atoms in a chair‐form hexagonal arrangement. The units are condensed and linked three‐dimensionally in the crystal resulting in a diamond‐like structure.     

Organic/inorganic hybrid vesicles based on a reactive block copolymer

Presented in this communication is a novel hybrid vesicle with a cross-linked polyorganosiloxane wall based on a new reactive block copolymer, poly(ethylene oxide)-block-poly(3-(trimethoxysilyl)propyl methacrylate) (PEO-b-PTMSPMA), which was synthesized by atom transfer radical polymerization. The vesicles were prepared first by self-assembly of the block copolymer in a selective solvent, and then the PTMSPMA block was subjected to hydrolysis and polycondensation reaction to fix vesicle wall in the presence of triethylamine as a catalyst. Transmission electron microscopy, scanning electron microscopy, NMR, and light scattering have been used to characterize the vesicles.     

唾液酸衍生物的合成进展

唾液酸是一类九碳糖,主要以糖脂或者糖蛋白的形式广泛分布于哺乳动物组织中,是脊椎动物细胞表面最重要的单糖.唾液酸可修饰的位点较多,目前已发展出成千上万的非天然唾液酸衍生物用于分子成像.尽管如此,非天然糖代谢工程方法还处于发展的初期,很多方面亟待发展和完善.结合本课题组的研究成果,着重介绍了唾液酸衍生物的合成进展.     

含镨稀土抛光粉的制备及其抛光性能研究

通过采用碳酸镧(铈、镨)为前驱体,经氟化、高温焙烧、机械湿磨的方法得到稀土抛光粉,研究了不同掺镨量对稀土抛光粉的物相结构、表面形貌、粒度、密度、抛蚀量的影响。通过XRD分析得出结论:La2O3,Pr6O11固溶于CeO2的晶格结构中,并且出现了新的物相LaOF;随镨掺量的增大,LaOF的衍射峰强度不断增加,晶化程度不断增加;CeO2的XRD特征峰向左偏移,晶胞参数变大,晶面间距变大。通过粒度分析得出结论:随镨掺量的增加,抛光粉的中位粒径出现了先减小后增大的规律性变化。通过抛蚀量测试得出结论:随镨掺量的增加,抛光粉的抛蚀量出现了先增大后减小的变化。掺镨稀土抛光在镨含量为4.8%时,具有最小的中位粒径、较好的表面形貌和最大的抛蚀量。     

中心切割GC-MS法分析煤液化油中的酚类化合物

使用碱洗提酚法提取煤液化油中的酚类化合物,然后结合Deans Switch装置和LTM色谱柱模块,采用中心切割气相色谱(GC)-质谱(MS)法对提取的酚类化合物进行定性。采用GC建立标准曲线,对煤液化油中主要酚类化合物的质量分数进行测定,并测定了煤液化油中邻甲基苯酚、2-乙基苯酚、4-丙基苯酚和5-茚酚4种酚类化合物的加标回收率。结果表明,在煤液化油中共定性出51种酚类化合物,测定了其中的35种酚类化合物的质量分数,其量占煤液化油总量的2.54(wt)%,苯酚和烷基苯酚占35种酚类化合物的88.2(wt)%。煤液化油中4种酚类化合物的加标回收率高,重复性好。     

Facile Preparation of α‐Zirconium Phosphate/Polyaniline Hybrid Film for Detecting Potassium Ion in a Wide Linear Range

A novel α‐zirconium phosphate/polyaniline (α‐ZrP/PANI) hybrid film used as K⁺ ion sensor was fabricated on carbon paper by electrochemical method. Mechanisms of film formation and detection of K⁺ ions were also proposed. The exfoliated α‐ZrP was mixed with PANI and deposited on carbon paper. The resultant α‐ZrP/PANI film exhibited a good current response to K⁺ ion with different concentrations. It also showed a wide logarithmic linear response in detecting K⁺ ions in the ranges of 10^?8–10^?4 M and 10^?4–10^?2 M, respectively. The results can be attributed to the synergetic effect of α‐ZrP and PANI.     

High‐expression β1 adrenergic receptor/cell membrane chromatography method based on a target receptor to screen active ingredients from traditional Chinese medicines

β‐Adrenergic receptors are important targets for drug discovery. We have developed a new β₁‐adrenergic receptor cell membrane chromatography (β₁AR‐CMC) with offline ultra‐performance LC (UPLC) and MS method for screening active ingredients from traditional Chinese medicines. In this study, Chinese hamster ovary‐S cells with high β₁AR expression levels were established and used to prepare a cell membrane stationary phase in a β₁AR‐CMC model. The retention fractions were separated and identified by the UPLC–MS system. The screening results found that isoimperatorin from Rhizoma et Radix Notopterygii was the targeted component that could act on β₁AR in similar manner of metoprolol as a control drug. In addition, the biological effects of active component were also investigated in order to search for a new type of β₁AR antagonist. It will be a useful method for drug discovery as a leading compound resource.     

Construction of Shallow Surface States through Light Ni Doping for High‐Efficiency Photocatalytic Hydrogen Production of CdS Nanocrystals

Ni‐doped CdS nanowires were synthesized by a simple one‐step method. X‐ray diffraction, X‐ray photoelectron spectroscopy, and photoluminescence spectroscopy confirmed that light Ni doping can form shallow surface states due to the presence of substitutional Ni ions, and heavy Ni doping can form deep surface states due to the presence of interstitial Ni ions. Surface photovoltage spectroscopy and transient photovoltage measurements revealed that the shallow surface states can prolong the lifetime of the photogenerated charge carriers, whereas the deep surface states lead to recombination of the photogenerated charge carriers. The relationship between different surface states and the photocatalytic performance of CdS nanocrystals are discussed. The enhanced density of shallow surface states due to light Ni doping significantly promotes photocatalytic H₂ production.