New Urea-Based Surfactants Derived from α,ω-Amino Acids
New Urea-Based Surfactants Derived from α,ω-Amino Acids
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DOI：
10.1021/jp807396k
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发表时间：
2009-01-29
影响因子：
3.3
通讯作者：
Garcia-Rio, Luis
中科院分区：
文献类型：
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作者：
Faustino, Celia M. C.;Calado, Antonio R. T.;Garcia-Rio, Luis
合成了从α、ω -氨基酸，特别是β -丙氨酸中提取的新型阴离子脲基表面活性剂，并通过电导率、平衡表面张力和稳态荧光光谱技术对其溶液性质进行了表征。双链表面活性剂和含有硫酸盐头基的单链表面活性剂的临界胶束浓度（cmc）值最低，降低表面张力的效果较好。所有表面活性剂都促进了相对于胶束化的吸附，胶束参数对氨基酸残基的疏水性敏感。用溶剂致变色探针E-T(30)（赖克特甜菜碱染料）测定的界面区极性与十二烷基硫酸钠（SDS）胶束相似。
New anionic urea-based surfactants derived from alpha,omega-amino acids and in particular from beta-alanine were synthesized and their solution properties characterized by electrical conductivity, equilibrium surface tension, and steady-state fluorescence spectroscopy techniques. Double-chain surfactants and the single-chain surfactant containing a sulfate head group exhibited the lowest critical micelle concentration (cmc) values and superior efficiency in lowering surface tension. All surfactants promoted adsorption relative to micellization, and micellar parameters were sensitive to the hydrophobicity of the amino acid residue. The polarity of the interfacial region, measured with the solvatochromic probe E-T(30) (Reichardt's betaine dye), was similar to sodium dodecyl sulfate (SDS) micelles.