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ID:52352649
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页数:8页
时间:2020-03-26
《基于多重氢键的寡聚芳酰胺自组装囊泡.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、物理化学学报(WuliHuaxueXuebao1AugustActaP.-Chim.Sin.2014,30(8),1501-15081501[Article]doi:10.3866/PKU.WHXB201406122www.whxb.pku.edu.CI1基于多重氢键的寡聚芳酰胺自组装囊泡贺有周刘云刘鹏冯文袁立华(四川大学化学学院,原子核科学技术研究所,辐射物理及技术教育部重点实验室,成都610064)摘要:六重氢键的异互补寡聚芳酰胺双股分子链在自组装过程中表现出极高的顺序专一性.本文借助扫描电镜(SEM)、透射电镜(TEM)和动态光
2、散射(DLS)等实验手段,研究了氢键编码顺序为DADDAD—DADDAD的寡聚芳酰胺分子1及异互补分子2(ADAADA.ADAADA)存在下的自组装行为.实验结果表明,分子1在四氢呋喃/甲醇(体积比为85/15)和单一溶剂丙酮中都能组装成大小均匀的囊泡结构,并且囊泡的尺寸随着溶液浓度的增加而增大:当加入异互补分子2后,囊泡则转变成实心球.利用荧光显微镜,发现该囊泡能很好地包裹荧光分子(罗丹明B),通过进一步分子结构修饰有可能实现药物包埋和缓释方面的应用.关键词:自组装:囊泡:寡聚芳酰胺:氢键:双股分子链中图分类号:0647Self-A
3、ssemblyofVesiclesfromOligoaramideBasedonMultipleHydrogenBondsHEYou-ZhouLIUYunLIUPengFENGWenYUANLi-Hua(KeyLaboratoryforRadiationPhysicsandTechnologyoftheMinistryofEducation,InstituteofNuclearScienceandTechnology,CollegeofChem&try,SichuanUniversity,Chengdu610064.R.China)A
4、bstract:Six—hydrogen-bondedoligoaramideheterOduDIexesdemonstrateextremelyhighsequence-specificityandtunablestabilityduringtheirself-assembly.Theself-assemblybehaviorofmolecularoligoaramide1arrayedinaDADDAD—DADDADsequenceandthatinthepresenceofoligoaramide2withanADAADA-AD
5、AADAsequencewereexaminedusingmultipletechniques,includingscanningelectronmicroscopy(SEM),transmissionelectronmicroscopy(TEM),anddynamiclightscattering(DLS).Resultsfr0mtheseexperimentsindicatethat1canself-assembletovesicleswithuniformshapesinbothtetrahydrofuran/methanol(
6、V/85/15)andacetone.thesizeofwhichincreasedwithanincreaseinsolutioncOncentratiOn.Uponadditionofthecorrespondingcomplementary2,thevesiclesturnedintosolidballs.Fluorescencemicroscopyexperimentsrevealedthatthevesicleswereabletoencapsulatethefluorescencemolecules(RhodamineB)
7、.Withfurthermodificationofmolecularstructures.thesevesiclesmayholdpotentiaIforapplicationsasdrugcarrieraswelfasjncontrolled-releasetechnology.KeyWords:Self-assembly;Vesicle;Oligoaramide;Hydrogenbond;Molecularduplex1引言关注.早期的研究主要是通过磷脂分子、“表面活性囊泡因其在生物模拟、纳米材料以及药物剂和嵌段共聚物“等作为主
8、体分子来设计和构和基因传递。等方面的重要意义而受到日益广泛筑囊泡体系.随着超分子化学的深入发展,相继出Received:April17,2014;Revised:June10,2014;PublishedonWeb:Ju
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