Degradation of Organic Cations under Alkaline Conditions
作者:Wei You、Kristina M. Hugar、Ryan C. Selhorst、Megan Treichel、Cheyenne R. Peltier、Kevin J. T. Noonan、Geoffrey W. Coates
DOI:10.1021/acs.joc.0c02051
日期:2021.1.1
degradation mechanisms of organiccations under basic conditions is extremely important for the development of durable alkaline energy conversion devices. Cations are key functional groups in alkaline anion exchange membranes (AAEMs), and AAEMs are critical components to conduct hydroxide anions in alkaline fuel cells. Previously, we have established a standard protocol to evaluate cation alkaline stability
了解碱性条件下有机阳离子的降解机理对于开发耐用的碱性能量转换装置极为重要。阳离子是碱性阴离子交换膜(AAEM)中的关键官能团,而AAEM是在碱性燃料电池中传导氢氧根阴离子的关键组分。以前,我们已经建立了一个标准协议来评估KOH / CD 3中的阳离子碱稳定性80°C下的OH溶液。在这里,我们使用该协议比较26种模型化合物,包括苄基铵,四烷基铵,螺环铵,咪唑鎓,苯并咪唑鎓,三唑鎓,吡啶鎓,胍鎓和and阳离子。目的不仅是评估它们的降解速率,而且是确定它们的降解途径并导致具有改善的碱性稳定性的阳离子的发展。
Rate constants for reaction of 1,2-dimethylimidazole with benzyl bromide in ionic liquids and organic solvents
作者:A. Skrzypczak、P. Neta
DOI:10.1002/kin.10162
日期:2004.4
The rateconstant for the Menschutkin reaction of 1,2-dimethylimidazole with benzyl bromide to produce 3-benzyl-1,2-dimethylimidazolium bromide was determined in a number of ionic liquids and molecular organicsolvents. The rateconstants in 12 ionic liquids are in the range of (1.0–3.2) × 10−3 L mol−1 s−1 and vary with the solvent anion in the order (CF3SO2)2 N− < PF6− < BF4−. Variations with the
Benzolsulfonylharnstoffe, Verfahren zu ihrer Herstellung sowie pharmazeutische Präparate enthaltend diese Verbindungen
申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0029983A1
公开(公告)日:1981-06-10
Sulfonylharnstoffe der Formel
worin
R1, X und Y die angegebene Bedeutung haben, sowie deren physiologisch verträgliche Salze, pharmazeutische Präparate auf Basis dieser Verbindungen sowie ihre Verwendung bei der Behandlung des Diabetes.
式中的磺酰脲类
其中
R1、X 和 Y 如上定义的磺脲类化合物及其生理耐受盐、基于这些化合物的药物组合物以及它们在治疗糖尿病中的用途。
IMIDAZOLIUM CATIONS WITH EXCEPTIONAL ALKALINE STABILITY
申请人:Cornell University
公开号:EP4108691A1
公开(公告)日:2022-12-28
The invention provides a compound of formula (II):
wherein:
R1 is
wherein ∗ represents the point of attachment to the nitrogen atom at position 1 of the imidazolium ring;
m is 0 or 1;
n is 1-8, provided that the sum of m + n does not exceed 8;
R2 is phenyl substituted with 0 to 3 substituents R6 individually selected from C1-C3 alkyl;
R3 is selected from C2-C16 hydrocarbyl;
R4 and R5 are individually selected from C1-C16 hydrocarbyl, or taken together R4 and R5, together with the carbon atoms to which they are attached, form a ring selected from benzene, cyclooctene and norbornene; and
X- is a counterion.
Imidazoles and imidazolium cations with exceptional alkaline stability
申请人:CORNELL UNIVERSITY
公开号:US11242432B2
公开(公告)日:2022-02-08
The invention provides: imidazole and imidazolium compounds of formulas (I) and (II):
polymers containing a plurality of imidazolium-containing repeating units of formula (III′):
and membranes and devices comprising the polymers. Also provided are methods of making the inventive compounds and polymers.
本发明提供:式 (I) 和 (II) 的咪唑和咪唑鎓化合物:
含有多个式(III′)含咪唑重复单元的聚合物:
以及包含这些聚合物的膜和装置。此外,还提供了制造本发明化合物和聚合物的方法。