作者:Iman Elidrisi、Saeedeh Negin、Pralav V. Bhatt、Thavendran Govender、Hendrick G. Kruger、George W. Gokel、Glenn E. M. Maguire
DOI:10.1039/c0ob01236j
日期:——
Five new cavitands were prepared that have four pendant n-undecyl chains and “headgroups” connected by 2-carbon spacers. The headgroups were ∼OCH2CONH-Ala-OCH3, 1; ∼OCH2CONH-Phe-OCH3, 2; ∼OCH2CONH-Ala-OH, 3; ∼OCH2CONH-Phe-OH, 4; and ∼OCH2CONHCH2CH2-thyminyl, 5. Pore formation by each cavitand was studied by use of the planar bilayer conductance experiment. All five compounds were found to form pores in asolectin bialyer membranes. Compounds 1–3 behaved in a generally similar fashion and exhibited open-close dynamics. Compounds 4 and 5 formed pores more rapidly, were more dynamic, and led more quickly to membrane rupture. Differences in the ion transport activity are rationalized in terms of structure and aggregate cavitand assemblies.
制备了五种新的腔体分子,这些腔体分子具有四个悬挂的正十一烷链和由两个碳间隔相连的“头部”。头部的结构分别为∼OCH2CONH-Ala-OCH3(1);∼OCH2CONH-Phe-OCH3(2);∼OCH2CONH-Ala-OH(3);∼OCH2CONH-Phe-OH(4);和∼OCH2CONHCH2CH2-胸苷基(5)。通过平面双层电导实验研究了每个腔体分子的孔形成。发现所有五种化合物均能在asolectin双层膜中形成孔。化合物1-3的行为一般相似,并显示出开闭动态。化合物4和5形成孔的速度更快,更具动态性,并且更快导致膜破裂。离子传输活性的差异可以从结构和聚集腔体分子组装的角度进行解释。