Scaling behaviour of PAMAM dendrimers determined by diffusion NMR

被引：49

作者：

Fritzinger, B ^{[1
]}

Scheler, U ^{[1
]}

机构：

[1] Leibniz Inst Polymer Res Dresden, D-01069 Dresden, Germany

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2005年 / 206卷 / 13期

关键词：

dendrimers; diffusion; hydrodynamic size; PAMAM; PFG NMR; scaling law;

D O I：

10.1002/macp.200500048

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The hydrodynamic radius of PAMAM dendrimers as a function of molar mass is investigated by diffusion NMR. As a characteristic length, the hydrodynamic radius is calculated by Stokes-Einstein equation. Poly(amidoamine) (PAMAM) dendrimers of generations 0 to 7 of two different terminal groups (NH2, COONa) have been investigated. This dependence of the hydrodynamic radius from molar mass is compared with a scaling model and statistical model. A scaling exponent of 3.7 has been found in both cases. The scaling exponent found exceeds the dimension of the embedding space, thus the possible growth of dendrimers of this structure is limited.

引用

页码：1288 / 1291

页数：4

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