Grafting of dendritic polyethers onto nanometre silica surface

被引：39

作者：

Guo, ZX ^{[1
]}

Yu, J ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Chem Engn, Inst Polymer Sci & Engn, Beijing 100084, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2002年 / 12卷 / 03期

关键词：

D O I：

10.1039/b107032k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Frechet-type polyether dendrons bearing COOH groups at the focal points have been grafted onto nanometre silica premodified with 3-aminopropyltriethoxysilane by N,N'-dicyclohexylcarbodiimide mediated amidation. The dendron grafted silicas have been characterized by FTIR spectroscopy, elemental analysis and thermogravimetric analysis (TGA). The percentages of net grafting were 4-16% (thus the percentages of total grafting were 11-23%), as determined by TGA and elemental analysis, suggesting that 4-19% of the total amino groups were involved in amidation. The effects of solvent, catalyst and generation number have also been studied.

引用

页码：468 / 472

页数：5

共 24 条

[11]

2-M

[12]

HENRIE SA, 1999, POLYM MAT SCI ENG, V80, P318

[13] Self-assembled lanthanide-cored dendrimer complexes: Enhancement of the luminescence properties of lanthanide ions through site-isolation and antenna effects [J].

Kawa, M ;

Frechet, JMJ .

CHEMISTRY OF MATERIALS, 1998, 10 (01) :286-296

[14]

MAJERLE RS, 1997, POLYM PREPR AM CHEM, V38, P690

[15] The synthesis of immobilised chiral dendrimers [J].

Mathews, BT ;

Beezer, AE ;

Snowden, MJ ;

Hardy, MJ ;

Mitchell, JC .

NEW JOURNAL OF CHEMISTRY, 2001, 25 (06) :807-818

[16]

Nalwa H., 2000, HDB NANOSTRUCTURED M

[17]

Nitzan B, 1997, J POLYM SCI POL CHEM, V35, P171

[18] Characterization of dendritic polymer-modified porous silica particles using size exclusion chromatography [J].

Sakai, K ;

Teng, TC ;

Katada, A ;

Harada, T ;

Uemura, S ;

Asami, Y ;

Sakata, M ;

Kunitake, M ;

Hirayama, C .

CHEMISTRY LETTERS, 2001, (06) :510-511

[19] Silica surface modification by cationic polymerization and carbenium intermediates [J].

Spange, S .

PROGRESS IN POLYMER SCIENCE, 2000, 25 (06) :781-849

[20] Grafting reaction of surface carboxyl groups on carbon black with polymers having terminal hydroxyl or amino groups using N,N'-dicyclohexylcarbodiimide as a condensing agent [J].

Tsubokawa, N ;

Hosoya, M ;

Kurumada, J .

REACTIVE & FUNCTIONAL POLYMERS, 1995, 27 (01) :75-81

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