Excellent Ag+ selective receptors: Syntheses and complexation properties of novel biscalix[4] arene with benzalazine groups

被引：13

作者：

Yang, Fafu ^{[1
]}

Hong, Biqiong ^{[1
]}

Chai, Xianfeng ^{[1
]}

Yin, Fengju ^{[1
]}

Chen, Yuanyin ^{[2
]}

机构：

[1] Fujian Normal Univ, Coll Chem & Mat, Fuzhou, Peoples R China

[2] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China

来源：

SUPRAMOLECULAR CHEMISTRY | 2009年 / 21卷 / 08期

基金：

中国国家自然科学基金;

关键词：

dendrimer; critical aggregation concentration; aggregation behaviour; EXTRACTION PROPERTIES; 2; KINDS; BISCALIXARENE; BINDING; DESIGN;

D O I：

10.1080/10610270802709394

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Dendrimers composed of G1 polyamidoamine branched with poly(propylene oxide) (PPO)-block-poly(ethylene oxide) (PEO) were synthesised for the first time. Surface tension results showed an increase in the critical aggregation concentration (cac) with PPO-b-PEO chain lengthening. The thermodynamic parameters associated with aggregate formation were determined by isothermal titration microcalorimetry, indicating that both the cac and the Gibbs free energy for aggregation (G degrees) ascended as the amphiphilic chain length increased. The gain of entropy (S degrees) was the main contribution to aggregation due to TS degrees being larger than the enthalpy (H degrees). Aggregate morphology and size distribution were studied through transmission electron microscope and dynamic light scattering measurements. Furthermore, the relationship between PEO chain length and aggregation behaviour was discussed.

引用

页码：691 / 698

页数：8

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