使用高导电性固态电解质代替常规的液态有机电解质能够从根本上改善锂电池的可靠性,安全性和性能。在这里,我们报告基于离子液体接枝到八倍硅倍半氧烷上的一类新的不可燃固体电解质的合成和表征。电解质具有出色的室温离子电导率(〜4.8×10 -4 S cm -1),出色的电化学稳定性(相对于Li +高达5 V)/ Li)和高热稳定性。使用制备的电解质膜的全固态锂金属电池在环境温度下成功地以高库仑效率循环。已经证明电解质对锂具有良好的循环稳定性。这项工作为开发用于室温锂电池的固体聚合物电解质提供了一个新的平台。
Mono- and dicationic short PEG and methylene dioxyalkylglycerols for use in synthetic gene delivery systems
作者:Christopher A. Hurley、John B. Wong、Jimmy Ho、Michele Writer、Scott A. Irvine、M. Jayne Lawrence、Stephen L. Hart、Alethea B. Tabor、Helen C. Hailes
DOI:10.1039/b719702k
日期:——
A range of monocationic and dicationic dioxyalkylglycerol cytofectins have been synthesised possessing methylene and short n-ethylene glycol spacers. The monocationic compounds were found to be effective in transfections when formulated as lipopolyplexes with peptide and DNA components, in particular with shorter PEG head groups which may have less effect on peptide targeting in the ternary complex.
[EN] CONJUGATES COMPRISING PEPTIDE GROUPS AND METHODS RELATED THERETO<br/>[FR] CONJUGUÉS COMPRENANT DES GROUPES PEPTIDIQUES ET PROCÉDÉS ASSOCIÉS À CEUX-CI
申请人:LEGOCHEM BIOSCIENCES INC
公开号:WO2017089894A1
公开(公告)日:2017-06-01
In some aspects, the invention relates to an antibody-drug conjugate, comprising an antibody; a linker; and at least two active agents. In preferred embodiments, the linker comprises a peptide sequence of a plurality of amino acids, and at least two of the active agents are covalently coupled to side chains of the amino acids. The antibody-drug conjugate may comprise a self-immolative group, preferably two-self-immolative groups. The linker may comprise an O-substituted oxime, e.g., wherein the oxygen atom of the oxime is substituted with a group that covalently links the oxime to the active agent; and the carbon atom of the oxime is substituted with a group that covalently links the oxime to the antibody.
Pyrene‐Tagged Alcoholic Ionic Liquids as Phase Transfer Catalysts for Nucleophilic Fluorination
作者:Abu Taher、Dong Wook Kim
DOI:10.1002/bkcs.12123
日期:2020.12
Functional group−activity relationships of pyrene‐tagged ionicliquid (PTIL)‐based organocatalysts for nucleophilic fluorination using alkali metal fluorides (MFs) are described, which demonstrate that the pyrene, oligoether and alcohol moieties on the imidazolium ring are vital for efficient catalysis. Further investigation of these findings led to the discovery of new strategy, which showed superior
描述了of标记的离子液体(PTIL)基有机催化剂用于使用碱金属氟化物(MF)进行亲核氟化的官能团活性关系,这表明咪唑环上的pyr,寡醚和醇部分对于有效催化至关重要。对这些发现的进一步研究导致了新策略的发现,该策略显示了卓越的催化剂分离工艺,即使用还原性氧化石墨烯可轻松地从反应混合物中分离出催化剂。PTIL作为相转移催化剂的催化效率通过使用CH 3 CN或t中的MF进行反应物的高转化率(高达98%的氟化产率)得到证明。戊醇。重要的是,该催化剂不仅可以在较短的反应时间内提高双分子亲核取代基(S N 2)的反应性,减少副产物的形成,而且在温和条件下易于分离和分离,可提供高收率。
Organocatalysis of nucleophilic substitution reactions by the combined effects of two promoters fused in a molecule: oligoethylene glycol substituted imidazolium salts
作者:Vinod H. Jadhav、Ju-Young Kim、Dae Yoon Chi、Sungyul Lee、Dong Wook Kim
DOI:10.1016/j.tet.2013.10.070
日期:2014.1
Oligoethylene glycol substituted imidazolium salts were synthesized as promoters for a range of SN2 reactions, and their efficiency was examined. These tailor-made organic promoters enhanced the nucleophilicity of alkali metal salts significantly through the combined effects of two promoters (oligoethylene glycols and imidazolium salts) in a single molecule. The effects of the oligoethylene glycol
合成了低聚乙二醇取代的咪唑鎓盐作为一系列S N 2反应的促进剂,并检查了它们的效率。这些量身定制的有机促进剂通过两个促进剂(低聚乙二醇和咪唑鎓盐)在单个分子中的联合作用,显着增强了碱金属盐的亲核性。系统研究了低聚乙二醇侧链长度,离子液体阴离子,亲核试剂和底物的影响。[hexaEGmim] [OMs]和[dihexaEGim] [OMs]显示了使用碱金属盐进行S N 2反应的最高效率。通过检查相对S N来评估低聚乙二醇部分的末端羟基基团的作用2氯化和溴化收率。结果表明,羟基与亲核试剂的氢键强度非常重要。通过量子化学计算研究了oligoEGILs促进S N 2反应的优异机理。结果表明,低聚乙二醇部分中的氧原子和离子液体阴离子作为路易斯碱作用于抗衡阳离子K +或Na +上,从而显着提高了金属盐的反应性。