有機合成(108) 離子液體(441) 催化(166) 離子液體制備(12) 離子液體物性數據(10) 納米(30) 分離過程(14) 綜述(5) 電化學(57) 離子液體純化(1) 氣體處理(17) 熒光(4) 脫硫(1) 催化制氫(1) 太陽能電池(1) 離子液體性能研究(20) 變焦透鏡(6) 纖維素溶解(6) 離子液體理論研究(4) 潤滑(10) 添加劑(4) 溶劑(38) 氣體壓縮(1) 功能材料(42) 脫酸工藝(1) 產業化(30) 物化性質研究(2) 新能源(9) 新型離子液體(11) 會議(18) 分析檢測(3) 電池(29) 空間技術(9) 高極性色譜柱(1) 離子液體市場分析(1) 電子技術(6) 生物相容性(9) 分析測試(16) 縮微實驗室(1)
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- 離子液體-性質、制備與應用
- 更新時間:2014-04-11;信息類型:專著
- 本書比較系統地介紹了離子液體的性質、制備和應用。全書共分7章,包括離子液體的定義和發展歷史;分類和制備;物理化學和結構性質;離子液體在有機合成、 催化、分離分析和電化學領域中的應用等。本書涵蓋了2005年10月以前國內外有關離子液體的最新研究成果,內容豐富翔實。 本書可供化學、化工、材料及相關學科領域從事研究開發、生產的科技與管理人員,以及高等院校師生閱讀參考。
- 鏈接地址:http://www.abmbags.com/download/article/2014-04-11/317.html
- Carborane-Derivatized Low-Melting Salts with Ether-Functionalized Cations—Preparation and Properties
- 更新時間:2014-04-10;信息類型:SCI論文
- A new series of low-melting ammonium salts based on the [nido-7,8-C2B9H12]– anion have been synthesized and characterized, and their physicochemical properties including spectroscopic properties, thermal properties, surface properties, solubility, density, viscosity, electrochemical properties, and tribological properties have been studied in detail. In comparison with previously reported carborane-derivatized imidazolium or pyridinium salts, these diether-functionalized ammonium salts display lower phase transition temperatures (Tg = –76 to –57 °C), and four exist as liquids at room temperature due to their flexible alkoxy chains. TGA analysis revealed that the weight loss rates of these carborane-derivatized low-melting salts were ca. 30–80 wt.-% after thermal decomposition, which is different from the traditional RTILs. SEM images showed that the resulting residue had hollow reticular shell morphology, and XPS and XRD analyses indicate that the main components of the skeleton are B2O3 and amorphous carbon. This provides a new strategy for preparing new inorganic porous materials by thermal decomposition of these low-melting salts.
- 鏈接地址:http://www.abmbags.com/download/article/2014-04-10/148.html
- Ionic liquid-modified dyes and their sensing performance toward acids in aqueous and non-aqueous solutions
- 更新時間:2014-04-10;信息類型:SCI論文
- Six ionic liquid (IL)-modified dyes were synthesized and characterized. Compared to the methyl red and methyl orange, these IL-modified [MR]- or [MO]-based dyes exhibit lower melting points and enhanced solubility, and can be used as sensitive indicators towards free proton in both aqueous and non-aqueous solutions. This work also supplies a new concept of developing novel modified materials with the ILs.
- 鏈接地址:http://www.abmbags.com/download/article/2014-04-10/135.html
- Hydrophobic 1-allyl-3-alkylimidazolium dicyanamide ionic liquids with low densities
- 更新時間:2014-04-10;信息類型:SCI論文
- Nine 1-allyl-3-alkylimidazolium ([ACnIm]) or 1-vinyl-3-alkylimidazolium ([VCnIm]) dicyanamides (DCA) were prepared and characterized, and their physicochemical properties were studied in detail. Except for [AVIm]DCA and [AC4Im]DCA, the other dicyanamides with hexyl or longer alkyl chains on the cation exhibited the characteristic of hydrophobicity. Among them, [AC8Im]DCA and [AC10Im] DCA were found to possess similar densities to water, i.e. 1.007 g cm3 and 0.988 g cm3 at 25 C, respectively. Interestingly, a reversible phase reversion of a [AC8Im]DCA/H2O mixture was observed as the temperature varied. These environmentally-friendly liquid materials have potential applications as precursors for syntheses of conducting polymeric materials.
- 鏈接地址:http://www.abmbags.com/download/article/2014-04-10/133.html
- Physicochemical Properties of Halogen-free 1,3-dialkylimidazolium Ionic Liquids Based on the Sulfonate Anions
- 更新時間:2014-04-10;信息類型:SCI論文
- 通過一步法合成了基于1,3-二烷基咪唑陽離子和甲烷磺酸或對甲苯磺酸陰離子的無鹵素離子液體, 并對它們的物理化學性質如聚集行為、表面性質、熱性質、密度、黏度、折光率和電化學性質等進行了詳細研究. 結果表明在甲烷磺酸陰離子基離子液體中觀察到離子液體中普遍存在的離子簇行為; 同等條件下[BEim]MS的熒光光譜強度較[BEim] TS弱; [C12Mim ]M S展現出液晶行為; [TS] - 基離子液體有著較高的折光率, 大于1.51
- 鏈接地址:http://www.abmbags.com/download/article/2014-04-10/128.html
- Novel Cyclic Sulfonium-Based Ionic Liquids: Synthesis, Characterization, and Physicochemical Properties
- 更新時間:2014-04-09;信息類型:SCI論文
- A new series of ionic liquids composed of three cyclic sulfonium cations and four anions has been synthesized and characterized. Their physicochemical properties, including their spectroscopic characteristics, ion cluster behavior, surface properties, phase transitions, thermal stability, density, viscosity, refractive index, tribological properties, ion conductivity, and electrochemical window have been comprehensively studied. Eight of these salts are liquids at room temperature, at which some salts based on [NO3] and [NTf2] ions exhibit organic plastic crystal behaviors, and all the saccharinbased salts display relatively high refractive indices (1.442–1.594). In addition, some ionic liquids with the [NTf2] ion exhibit peculiar spectroscopic characteristics in FTIR and UV/Vis regions, whilst those salts based on the [DCA] ion show lower viscosities (34.2–62.6 mPas at 20℃) and much higher conductivities (7.6–17.6 mScm-1 at 20℃) than most traditional 1,3-di-ACHTUNGTRENUNGalkylimidazolium salts.
- 鏈接地址:http://www.abmbags.com/download/article/2014-04-09/112.html
- Physicochemical Properties of Nitrile-Functionalized Ionic Liquids
- 更新時間:2014-04-09;信息類型:SCI論文
- A series of ionic liquids (ILs) based on nitrile-functionalized imidazolium, pyridinium, and quaternary ammonium as cations and chlorides and tetrafluoroborate, hexafluorophosphate, dicyanamide, and bis- (trifluoromethanesulfonyl)imide as anions have been prepared and characterized. The physicochemical properties such as spectroscopic, thermal, solubility, surface, electrochemical, tribological, and toxic properties were comparatively studied. The results showed that the incorporation of a CN group to cations could result in remarkable changes in these properties. The reason resulting in such remarkable differences in the properties may be attributed to the conformational changes in the imidazolium groups caused by the interaction between the CN group with other neighboring cations or anions and the enhancement in hydrogen-bonding interactions due to the incorporation of a CN group.
- 鏈接地址:http://www.abmbags.com/download/article/2014-04-09/104.html
- Novel Ionic Liquid Crystals Based on N-Alkylcaprolactam as Cations
- 更新時間:2014-04-09;信息類型:SCI論文
- A novel series of ionic liquids (ILs) based on N-alkyl- -caprolactam as cations [Cn-CP]+ (Cn ) alkyl with different numbers of C atoms; n ) 6, 8, 10, 12, 16, or 18) containing toluene-p-sulfonate [TS]- and methanesulfonate [MS]- as anions have been synthesized via a one-step atom-economic reaction. Characterizations of these ILs by differential scanning calorimetry, polarizing optical microscopy, variabletemperature powder X-ray diffraction, etc., were conducted. The results showed that the caprolactambased ILs (n≥8) were enantiotropic thermotropic liquid crystals, except for C18-CPMS (monotropic), and displayed smectic A phases. Some properties, such as higher transition enthalpies (e.g., ΔH=83.1 kJ/mol for C18-CPTS), higher specific heat capacities (e.g., Cp=2.85 J/g·K for C16-CPTS) and higher heat storage densities (e.g., sensible heat storage density Es=262.8l MJ/m3 for C16-CPTS; latent heat storage density El=146.0 MJ/m3 for C18-CPTS), were observed. Fluorescence measurements showed that the homologous Cn-CPTS ILs exhibited strong fluorescence behavior. Finally, the test of acute toxicity toward rats showed that these new ILs were less toxic than the popular [BMIm]BF4 IL.
- 鏈接地址:http://www.abmbags.com/download/article/2014-04-09/103.html
- Protic pyridinium ionic liquids: Synthesis, acidity determination and their performances for acid catalysis
- 更新時間:2014-04-09;信息類型:SCI論文
- Three new protic ionic liquids based on 2-methylpyridinium were prepared and characterized. Their catalytic activities for the tert-butylation of phenol and the esterification of cyclic olefins with acetic acid were examined and satisfactory results were obtained over 2-methylpyridinium trifluoromethanesulfonate ([2-MPyH]OTf). Hammett method was used to determine the acidity order of these ionic liquids and the results are consistent with the catalytic activities observed in the acid-catalyzed probe reactions.
- 鏈接地址:http://www.abmbags.com/download/article/2014-04-09/97.html
- Investigation of Physicochemical Properties of Lactam-Based Br?nsted Acidic Ionic Liquids
- 更新時間:2014-04-06;信息類型:SCI論文
- Novel lactam-cation-based Bronsted acid ionic liquids (ILs) were prepared through a simple and atom-economic neutralization reaction between a lactam, such as caprolactam and butyrolactam, and a Bronsted acid, HX, where X is BF4-, CF3COO-, phCOO(-), ClCH2COO-, NO3-, or H2PO4-. The density, viscosity, acidic scale, electrochemical window, temperature dependency of ionic conductivity, and thermal property of these ILs were measured and investigated in detail. The results show that protonated caprolactam tetrafluoroborate (CPBF) has a relatively strong acidity with -0.22 of Hammett acidic scale Ho and caprolactam trifluoroacetate (CPTFA) and pyrrolidonium trifluoroacetate (PYTFA) ILs possess very low viscosities, that is, 28 cP and 11 cP, respectively. An investigation of thermal property showed that a wide liquid range (up to -90 degrees C), moderate thermal stability (up to 249 degrees C for 10% of decomposition), and complex polymorphism were observed in these ILs. In comparison to imidazolium-cation-based ILs, the lactam-cation-based Bronsted acid ILs have a relatively lower cost, lower toxicity, and comparable ion conductivity and heat storage density (more than 200 MJ/m(3)). They have wide applicable perspectives for fuel cell devices, thermal transfer fluids, and acid-catalyzed reaction media and catalysts as replacements of conventional inorganic acids.
- 鏈接地址:http://www.abmbags.com/download/article/2014-04-06/37.html