Structure of charged poly(propylene imine) dendrimers: Theoretical investigation

被引：24

作者：

Govorun, EN ^{[1
]}

Zeldovich, KB ^{[1
]}

Khokhlov, AR ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119992, Russia

来源：

MACROMOLECULAR THEORY AND SIMULATIONS | 2003年 / 12卷 / 09期

关键词：

calculations; counterions; dendrimers; elasticity; polyelectrolytes;

D O I：

10.1002/mats.200350030

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A mean-field model for charged dendrimers has been elaborated and applied to Astramol clenchimers of 5(th) generation in salt-free solution. The free energy of a dendrimer molecule was minimized with respect to the dendrimer size and to the profile of counterion distribution. The model of highly stretched freely jointed chain was used to describe the elasticity of long branches, the dissociated groups were assumed to be localized mostly on the periphery of the molecule, and the electrostatic interactions were described in the Poisson-Boltzmann approximation. It was found that the osmotic pressure of counterions leads to moderate expansion of dendrimer molecules upon charging, and a significant fraction of counterions is localized within the dendrimer molecule under typical experimental conditions.

引用

页码：705 / 713

页数：9

共 28 条

[1] A self-consistent mean field model of a starburst dendrimer: Dense core vs dense shell [J].

Boris, D ;

Rubinstein, M .

MACROMOLECULES, 1996, 29 (22) :7251-7260

[2]

DEGENNES PG, 1983, J PHYS LETT-PARIS, V44, pL351, DOI 10.1051/jphyslet:01983004409035100

[3]

Hult A, 1999, ADV POLYM SCI, V143, P1

[4]

JAMES H, 1943, J CHEM PHYS, V4, P153

[5]

JAMES H, 1949, J CHEM PHYS, V11, P455

[6] Polyelectrolyte behavior of astramol poly(propyleneimine) dendrimers [J].

Kabanov, VA ;

Zezin, AB ;

Rogacheva, VB ;

Gulyaeva, ZG ;

Zansochova, MF ;

Joosten, JGH ;

Brackman, J .

MACROMOLECULES, 1998, 31 (15) :5142-5144

[7] Interaction of Astramol poly(propyleneimine) dendrimers with linear polyanions [J].

Kabanov, VA ;

Zezin, AB ;

Rogacheva, VB ;

Gulyaeva, ZG ;

Zansochova, MF ;

Joosten, JGH ;

Brackman, J .

MACROMOLECULES, 1999, 32 (06) :1904-1909

[8]

Khokhlov A. R., 1994, STAT PHYS MACROMOLEC

[9]

KHOKHLOV AR, 1993, ADV POLYM SCI, V109, P123

[10] Collapse of polyelectrolyte macromolecules revisited [J].

Kramarenko, EY ;

Khokhlov, AR ;

Yoshikawa, K .

MACROMOLECULES, 1997, 30 (11) :3383-3388

← 1 2 3 →