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Synthesis and Properties of Azobenzene-containing Surfactant

Author: LiXiangHui
Tutor: WangGuang
School: Northeast Normal University
Course: Analytical Chemistry
Keywords: Surfactant AOT Azobenzene Pyridine azobenzene Photoisomerization A ferroelectric liquid crystal Chiral group Synthesis
CLC: TQ423
Type: Master's thesis
Year: 2008
Downloads: 143
Quote: 1
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Abstract


A surface active agent may be used in the analog film structure the synthetic LB technique , a dye , quantum dots , and drug substance carrier and controlled release and other related fields . Therefore, the design and synthesis of new surfactants with a specific structure and function has a special significance . Is designed and synthesized two new optical active surfactant , one containing the azo phenyl group of the new optically active surfactant AZO - AOT- , which is introduced into the surface of the light - reactive azo phenyl group having a active agent 2 - ( 2 - ethyl - hexyl ) succinate sulfonate (AOT) synthesized ; another containing pyridylazo phenyl group of the block polymer surfactant , this surfactant is while having a light reaction activity and an acid -reactive pyridylazo phenyl groups can be introduced into the the amphoteric block polymer by atom transfer radical process synthesis . In this paper, nuclear magnetic resonance spectroscopy (~ 1HNMR), mass spectrometry, UV - visible spectroscopy (UV-VIS) , a variety of means were used to characterize the structure and the nature of the two new surfactant . Azo phenyl group and a pyridyl - azo phenyl group is introduced into the surfactant molecules , and the formation and cleavage of the capsule in the solvent be able to enable the synthesis of a novel surface active agent by UV - the irradiation of visible light and UV - visible and acidity dual control reversible control , which is due to the azo phenyl group in the UV - visible light irradiation can undergo a reversible isomerization of cis -and trans- , and the pyridine nitrogen atom in the molecule is combined with an acid , causing cleavage and re-formation of the capsule . The surface active agent in a solvent to form a capsule can be regulated by a variety of ways such process, making it more extensive application . Ferroelectric liquid crystal has a fast response speed compared with other LCD caused widespread concern . Almost all of the ferroelectric liquid crystal molecules having a chiral structure . Thione chiral group into the desired form of the liquid crystal in the liquid crystal molecules having ferroelectric properties . The molecular structure of the Mass Spectrometry ( MS ) , nuclear magnetic resonance spectra (HNMR) and an ultraviolet spectrometer (UV) and other methods characterization.

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CLC: > Industrial Technology > Chemical Industry > Reagents and the production of pure chemicals > Surfactant
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