An efficient preparation and characterization of 1-(2-ethoxy-2-oxoethyl)imidazolium based ionic liquids derivatives as potential bioactive agents

A set of new 1-(2-ethoxy-2-oxoethyl)imidazolium-based ionic liquids (1–16) have been prepared via the alkylation reaction of ethyl 2-(1H-imidazol-1-yl)acetate with various type of substituted alkyl halides using a microwave irradiation reaction in yields above 90%. The chemical structures of the manufactured ILs (1–16) were analyzed by mass and NMR spectroscopy. The newly prepared ILs were examined for their in vitro anti-microbial activities towards different types of Gram (+) and Gram (−) bacteria, and also for their antifungal activities. The preliminary tests showed that most of the resultant ILs presented modest activities towards S. aureus and B. subtilis with IZ values ranging between 10 and 14 mm, while the E. coli activities was in the range of 16 and 20 mm. However, ILs (1–16) displayed poor activities against the C. albicans.     

Particles in composite polymer electrolyte for solid-state lithium batteries: A review

Solid-state lithium batteries (SSLBs) have been identified as one kind of the most promising energy conversion and storage devices because of their safety, high energy density, and long cycling life. The development of solid-state electrolyte is vital to commercialize SSLBs. Composite polymer electrolyte (CPE), derived by compositing inorganic particles into solid polymer electrolyte has become the most practical species for SSLBs because it inherits the advantages of polymer electrolyte and simultaneously achieves enhanced ionic conductivity and mechanical properties. The characteristics of inorganic particles and their interaction with polymers strongly impact the performance of CPE, improving its ionic conductivity, mechanical properties, thermal and electrochemical stability, as well as interface compatibility with both electrodes. In this review, the effects of particle characteristics including its species, size, proportion, morphology on the ionic conductivity and mechanical properties of CPE are reviewed. Meanwhile, some novel composite strategies are also introduced including surface modification, hybridization, and alignment of particles in polymer matrices, as well as some new preparation methods of CPE. The interactions between particles and other components in CPE including polymer matrices or lithium salt are particularly focused herein to reveal the lithium conductive mechanism. Finally, a perspective on the direction of future CPE development for SSLBs is presented.     

Metal ion capacitor composed of the thin-walled surfaces enabling high-rate performance and long cycling stability

Electrochemical capacitors (referred to as supercapacitors) have high power density, long cycling stability, and are eco-friendly for use in electronic applications. The proper and stable utilization of supercapacitor systems can expand the practical scope of energy-powering applications in various device platforms. Nevertheless, the low energy density of conventional oxide and sulfide electrode materials still limits the practical realization of supercapacitor devices in real electronic applications. This limitation results from the poor surface stability, structural collapse, and low electrical conductivity of the oxide and sulfide materials. Single metal electrodes with multivalent metal ions exhibit promising energy-storing kinetics and may be viable alternatives to these oxide and sulfide electrode materials. Here, we report a metal zinc (Zn) electrode supercapacitor (ZIC) consisting of a thin-walled architecture as an electrode by means of a voltage-controlled electroplating method. The optimized ZIC exhibited excellent pseudo-capacitive performance, excellent high-rate performance, and an outstanding cycling stability.     

室温离子液体中合成方钠石的研究

本文以离子液体为溶剂, 在常压下采用离子液体热合成方法合成了方钠石分子筛.     

Solid-state nanopores for ion and small molecule analysis

Solid-state nanopore in analytical chemistry has developed rapidly in the 1990s and it is proved to be a versatile new tool for bioanalytical chemistry. This review focuses on the analysis of ions and small molecules with nanopores including nanopipettes, polymer film nanopores, Si₃N₄ nanopores, graphene nanopores, MoS₂ nanopores and MOFs.     

POE incorporation into ionic clusters of ionomer and ion-conduction behaviors

Poly(oxyethylene) (POE) was incorporated into the ionic clusters of ionomers, ethylene and methacrylic acid (7.2% neutralized with KOH) copolymer membrane. The changes of properties were studied from SAXS, DSC, IR and ionic conductivity. The IR study suggested that the coordinated structures in ionic clusters of the membrane were destroyed by POE incorporation, and also SAXS suggested that ionic clusters were swollen by POE incorporation. The ionic conductivity, a carrier being K⁺ in this system, increases from 10^?16 S/cm to 10^?9 S/cm at 30°C by the incorporation of POE (20.5 wt%). On the other hand, a large amount of POE (63 wt%) could be incorporated into ionomer membrane by the esterification of methacrylic acid groups (93%) with POE. When LiClO₄ was added, ionic conduction occurred in the phase-separated POE domain, which had a low glass transition temperature (?55.2°C), showing an ionic conductivity 2.6 × 10^?6 S/cm at 25°C.     

Cation identity dependence of crown ether photonic crystal Pb<Superscript>2+</Superscript> sensing

We quantitatively modeled the volume phase transition of a hydrogel containing a crystalline colloidal array with a crown ether ligand which binds Pb²⁺. The hydrogel volume response and the wavelength diffracted depend on the Pb²⁺ concentration and on both the ionic strength and the valence of the nonbinding ionic species. We successfully modeled the response of this hydrogel Pb²⁺ sensor to ionic strength and the cation valence of the added salts. Figure Cation identity dependence of crown ether photonic crystal Pb⁺ sensing     

LiTFSI/2-噁唑烷酮电解液与不同微结构碳材料的电化学兼容性

二（三氟甲基磺酸酰）亚胺锂（LiTFSI）与1,3-氮氧杂环戊-2-酮（OZO）形成的离子液体具有良好的物理和电化学性能,表现出宽的液相温度范围和高的离子电导率,可满足超级电容器的应用需求。本文制备的LiTFSI-OZO离子液体体系中,各种离子的结构组成（如自由离子、离子对、积聚离子）及其之间的相互作用对离子液体的电化学性能具有较大的影响,将其作为电解液应用于不同微结构特性（孔径、比表面积等）的炭材料（碳纳米管(CNTs)、中孔活性炭(MEACs)和微孔活性炭(MIACs)）作为电极的电化学双层电容器中,电化学兼容性研究表明,由于中孔活性炭电极材料有最大的比表面积及最适宜的孔径分布,相应的模拟电容具有最高的比容量184.6 F?g-1。该研究表明,对电极材料的微结构特性与离子液体离子尺度进行优化匹配是实现离子液体作为电解液应用于超级电容器的关键。     

恒电位自动滴定法分析脂肪酶水解活性影响因素

利用恒电位自动滴定法分析了脂肪酶(Candida rugosa lipase,CRL)催化橄榄油水解活性的影响因素,确定了适宜的酶活性测定条件,对比了传统表面活性剂和咪唑类离子液体对酶活性的影响.37 ℃时,与酶蛋白浓度呈线性关系的酶活性测定范围为1～14 μmol/min;酶蛋白浓度范围为0.01～0.07 g/L;...     

壳聚糖在4种咪唑型离子液体中溶解性的研究

研究、比较了壳聚糖在4种咪唑型离子液体氯化1-丁基-3-甲基咪唑([BMIM]Cl)、1-丁基-3-甲基咪唑醋酸盐([ BMIM] Ac)、1-乙基-3-甲基咪唑醋酸盐([EMIM] Ac)和氯化1-烯丙基-3-甲基咪唑([AMIM] Cl)中的溶解性,提出了可能的溶解机理,并利用红外光谱(FTIR)、热重分析(TGA...