由N-烷基(烷基醚)-N-甲基吡咯烷鎓,-恶唑烷鎓,-哌啶鎓或-吗啉鎓阳离子(烷基= nC4H9,烷基醚= CH3OCH2,CH3OCH2CH2)和全氟烷基三氟硼酸根阴离子([R(合成并表征R(F)= CF 3,C 2 F 5,nC 3 F 7,nC 4 F 9)。这些盐大多数在室温下为液体。测量了这些盐的关键特性-相变,热稳定性,密度,粘度,电导率和电化学窗口-并将其与相应的[BF4]-和[(CF3SO2)2N]-盐进行比较。就阳离子和阴离子的身份,阳离子侧链的变化(即烷基对烷基醚),以及[R(F)BF3]-离子中全氟烷基(R(F))长度的变化。在纯的N-丁基-N-甲基吡咯烷鎓五氟乙基三氟硼酸酯作为支持电解质中,发生Li +离子的还原和锂金属的再氧化。这样的全面研究增强了为许多应用(包括电解质)设计和优化离子液体所必需的知识。这些新盐中的某些显示出所需的特性,包括低熔点,高热稳定性,低粘
Tartrate-based ionic liquids: unified synthesis and characterisation
摘要:
本文介绍了一种制备酒石酸衍生有机盐与大块非配位阳离子的方便而通用的方法。该方法基于酒石酸与阳离子氢氧化物在水溶液中的中和反应。通过系统地改变半酒石酸阴离子或双酒石酸阴离子以及有机阳离子的性质,制备出一系列 24 种酒石酸盐。此外,还将阴离子的手性作为结构改造的载体进行了探索。我们还进行了包括 X 射线晶体学在内的全面表征。通过对这些盐的理化性质进行比较研究,发现了一些有用的趋势,有助于设计适当的酒石酸手性离子液体。
A convenient and general preparative approach for tartrate-derived organic salts with bulky non-coordinating cations is described. This route is based on neutralisation of tartaric acid with cation hydroxides in aqueous solution. A series of 24 tartrate salts was prepared by systematic variation of the hemi- or bis-tartrate anion and the nature of the organic cation. Chirality of the anion was also explored as a vector for structural modification. Complete characterisation, including X-ray crystallography, was carried out. This comparative study of the physicochemical properties of these salts led to the identification of several informative trends useful for designing proper tartrate-based chiral ionic liquids.
本文介绍了一种制备酒石酸衍生有机盐与大块非配位阳离子的方便而通用的方法。该方法基于酒石酸与阳离子氢氧化物在水溶液中的中和反应。通过系统地改变半酒石酸阴离子或双酒石酸阴离子以及有机阳离子的性质,制备出一系列 24 种酒石酸盐。此外,还将阴离子的手性作为结构改造的载体进行了探索。我们还进行了包括 X 射线晶体学在内的全面表征。通过对这些盐的理化性质进行比较研究,发现了一些有用的趋势,有助于设计适当的酒石酸手性离子液体。
Synthesis and properties of ionic liquids based on mecoprop
Ionicliquids with the mecoprop anion and 1-alkyl-1-methylpiperidinium cation were synthesized by using a two-step approach. In the obtained homologue series the alkyl chain ranged from two to eighteen atoms. Basic physicochemical properties such as density, viscosity and refractive index as well as solubility in water and common organic solvents were determined for the prepared ILs. Additionally,
In this study, fourteen new herbicidal ionic liquids (HILs) based on MCPB with a 1-alkyl-1-methylpiperidinium cation were synthesized and characterized.
Influence of the alkyl chain length on the physicochemical properties and biological activity in a homologous series of dichlorprop-based herbicidal ionic liquids
This study focused on the synthesis and subsequent characterization of a homologous series of herbicidal ionic liquids (HILs) that incorporate a 2-(2,4-dichlorophenoxy)propionate (dichlorprop) anion and 1-alkyl-1-methylpiperidinium cation with a varied alkyl length from ethyl to octadecyl. Novel derivatives of dichlorprop were synthesized in high yields (≥90%) via a simple and eco-friendly two-step
Photoresist underlayer film-forming composition and pattern forming process
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP2813890A2
公开(公告)日:2014-12-17
In lithography, a composition comprising a novolak resin comprising recurring units derived from a naphtholphthalein is used to form a photoresist underlayer film. The underlayer film is strippable in alkaline water, without causing damage to ion-implanted Si substrates or SiO2 substrates.