Elucidating the structure of the Pm3n cubic phase of supramolecular dendrimers through the modification of their aliphatic to aromatic volume ratio.
Elucidating the structure of the Pm3n cubic phase of supramolecular dendrimers through the modification of their aliphatic to aromatic volume ratio.
复制标题
通过改变脂肪族与芳香族体积比来阐明超分子树枝状聚合物的 Pm3n 立方相的结构。
作者：
V. Percec;M. Peterca;Y. Tsuda;Brad M. Rosen;S. Uchida;M. R. Imam;G. Ungar;P. Heiney
报告了自组装成球形超分子树枝状聚合物的第二代圆锥形树枝状分子库的合成、结构和逆结构分析。该文库由具有含有 4 至 16 个碳原子的正烷基的两亲性树枝组成。正烷基中含有 6 至 16 个碳原子的树枝自组装成球形超分子树枝状聚合物，并在 Pm3n 立方晶格中自组织。对超分子树枝状聚合物生成的 Pm3n 晶格的结构和逆结构分析表明，球形树枝状聚合物的芳香核的体积不依赖于其烷基的碳原子数。该结果有助于计算球形超分子树枝状聚合物的脂肪族和芳香族域的绝对电子密度的平均值。 Pm3n 晶格的高阶衍射峰的相对强度随着正烷基中碳原子数量介导的球体脂肪族部分体积的减小而增加。这项研究证明了非空心超分子树枝状聚合物产生的 Pm3n 晶格的高阶衍射峰的相对强度的最大增加。
The synthesis, and structural and retrostructural analysis of a library of second-generation conical dendrons that self-assemble into spherical supramolecular dendrimers is reported. This library consists of amphiphilic dendrons with n-alkyl groups containing from 4 to 16 carbon atoms. The dendrons containing 6 to 16 carbon atoms in their n-alkyl groups self-assemble into spherical supramolecular dendrimers that self-organize in a Pm3n cubic lattice. The structural and retrostructural analysis of the Pm3n lattices generated from the supramolecular dendrimers demonstrated that the volume of the aromatic core of the spherical dendrimers is not dependent on the number of carbon atoms from their alkyl groups. This result facilitated the calculation of the average values of the absolute electron density of the aliphatic and aromatic domains of the spherical supramolecular dendrimers. The relative intensity of the higher order diffraction peaks of the Pm3n lattice increases as the volume of the aliphatic part of the sphere mediated by the number of carbon atoms in the n-alkyl groups decreases. This study demonstrates the maximum increase of the relative intensity of the higher order diffraction peaks of the Pm3n lattice generated from non-hollow supramolecular dendrimers.
影响因子：
2.9
作者：
D. Turner;S. Gruner
通讯作者：
D. Turner;S. Gruner