Synthesis, Surface and Antimicrobial Activities of Cationic Gemini Surfactants with Semi-Rigid Spacers
作者:Hai-lin Zhu、Zhi-yong Hu、Xue-mei Ma、Jian-long Wang、Duan-lin Cao
DOI:10.1007/s11743-015-1777-4
日期:2016.3
Four cationicgeminisurfactants featuring semi‐rigidspacers were synthesized via a two‐step process. The surface‐active properties of these surfactants were investigated through surface tension and electrical conductivity measurement. The thermodynamic parameters of micellization were evaluated from electrical conductivity measurements at temperatures ranging from 293 to 313 K. The aggregation behavior
Synthesis, characterization and study of mesomorphic behavior of new bent and linear core compounds containing heterocyclic rings
作者:Nisreen H. Karam、Alaa K. Shanshal、Ammar H. Al-Dujaili
DOI:10.1080/15421406.2021.1966871
日期:2021.12.12
Abstract The article presents the synthesis and liquid crystalline properties of some of new bent and linear core compoundscontaining a 1,3,4-oxadiazole, piperazine and thiazolidin-4-one rings as a central core. The new synthesized compounds were characterized by elemental analysis and FTIR, 1HNMR and mass spectroscopy). The liquid crystalline properties were studied by polarized optical microscopy
Synthesis, surface activity and thermodynamic properties of cationic gemini surfactants with diester and rigid spacers
作者:Ting Zhang、Xianfei Cao、Xuchun Wang、Changchun Song
DOI:10.1016/j.molliq.2017.01.063
日期:2017.3
A group of cationicgeminisurfactants with diester and rigidspacers, 12-Ph-12, 14-Ph-14, 16-Ph-16, were synthesized and confirmed by IR, 1H NMR and elemental analysis. The surface parameters of the synthesized geminisurfactants including: the critical micelle concentration (CMC), the surface tension value at CMC (γCMC), effectiveness (πCMC), efficiency (pC20), maximum surface excess (Γmax) and minimum
A组与二酯和刚性隔离物,阳离子双子表面活性剂的12-PH-12,14-PH-14,16-PH-16,合成,并通过IR,确认1 H NMR和元素分析。合成的双子表面活性剂的表面参数,包括:临界胶束浓度(CMC),在CMC(γ的表面张力值CMC),有效性(π CMC),效率(PC 20),最大表面过量(Γ最大)和最小表面积(A min)是通过表面张力测量获得的。这些双子表面活性剂显示出比传统单体表面活性剂更高的表面活性。电导率测量表明,胶束化过程的热力学参数表明,胶束化过程是环境中的自发放热过程,随着烷基链长度的减小和温度的升高,胶束化过程变得不利。从稳定的荧光光谱评估微极性,并使用紫外可见光谱研究染料的增溶作用。结果表明,表面活性剂胶束的微极性非常低,这些双基表面活性剂可以真正提高水不溶性染料的溶解度。
CONTROLLED RELEASE OF BIOLOGICALLY ACTIVE COMPOUNDS
申请人:Bezwada Rao S.
公开号:US20090060979A1
公开(公告)日:2009-03-05
The present invention relates to biodegradable polymers (e.g., polyesters and polyester amides) derived from functionalized biologically active compounds that can provide site specific delivery of bioactive compounds upon biodegradation in a controlled manner.