Effect of pH and Oxygen Atom of the Hydrophobic Chain on the Self-Assembly Property and Morphology of the Pyridyl Boronic Acid Based Amphiphiles
作者:Monali Maiti、Aparna Roy、Sumita Roy
DOI:10.1021/la403379g
日期:2013.11.5
transmission electron microscopy (TEM). Both of the amphiphiles exhibit a single break in the surface tension vs log(concentration) plots, indicating existence of one critical aggregation concentration. Steady state fluorescence spectroscopy was used to determine the polarity indexes using pyrene and the rigidity of the microenvironments of the aggregates using 1,6-diphenyl-1,3,5-hexatriene (DPH) as fluorescence
Tailoring boron liquid crystals: Mesomorphic properties of iminodiacetic acid boronates
作者:Christopher Schilling、Alina Bauer、Julius A. Knöller、Finn Schulz、Anna Zens、Sabine Laschat
DOI:10.1016/j.molliq.2022.120519
日期:2022.12
k = 1 – 3), or N-methyl in combination with bend meta-alkoxyphenyl (Ph(n)metaMIDA), linear alkoxy-pyridyl (Pyr(n)1MIDA) and -pyrimidinyl (Pym(n)1MIDA) respectively, were prepared. Analysis by differential scanning calorimetry (DSC), polarizing optical microscopy (POM) and X-ray diffraction (WAXS, SAXS) revealed that N-ethyl and bend-shaped aryl units mostly lowered the clearing transition temperatures
当 MIDA 硼酸盐与传统的单、双或三烷氧基苯基介晶连接时,高极性N-甲基亚氨基二乙酸 (MIDA) 单元会诱导液晶自组装。为了了解刚性介晶单元和N-取代基对介晶性质的影响,六系列带有N-乙基的 IDA 硼酸盐与经典的介晶芳基单元 ( Ph(n) k EIDA,n = 10 – 16, k = 1 – 3),或N-甲基与弯曲间-烷氧基苯基( Ph(n)间MIDA )、直链烷氧基-吡啶基 ( Pyr(n) 1 MIDA) 和-嘧啶基 ( Pym(n) 1 MIDA ) 分别制备。通过差示扫描量热法 (DSC)、偏光显微镜 (POM) 和 X 射线衍射 (WAXS, SAXS) 分析表明,N-乙基和弯曲形芳基单元主要降低了透明转变温度,降低了热分解和影响 SmA 相的偏好,而杂环单元有利于稳定的 SmA 相。
DIFLUORPHENYLPYRIMIDYLPYRIDIN-DERIVATE UND IHRE VERWENDUNG IN FLÜSSIGKRISTALLINEN MISCHUNGEN
申请人:Aventis Research & Technologies GmbH & Co KG
公开号:EP0883618B1
公开(公告)日:2001-05-16
US6022492A
申请人:——
公开号:US6022492A
公开(公告)日:2000-02-08
Boronic species as promising inhibitors of the Staphylococcus aureus NorA efflux pump: Study of 6-substituted pyridine-3-boronic acid derivatives
including hydrophilic fluoroquinolones. Starting from 6-benzyloxypyridine-3-boronic acid I that we previously identified as a potential inhibitor of the NorA efflux pump against the NorA-overexpressing S. aureus 1199B strain (SA1199B), we describe here the synthesis and biologicalevaluation of a series of 6-(aryl)alkoxypyridine-3-boronic acids. 6-(3-Phenylpropoxy)pyridine-3-boronic acid 3i and 6-