Polymer-induced alignment of DL-alanine nanocrystals to crystalline mesostructures

被引：150

作者：

Wohlrab, S

Pinna, N

Antonietti, M

Cölfen, H

机构：

[1] Max Planck Inst Colloids & Interfaces, D-14424 Potsdam, Germany

[2] Tech Univ Dresden, Inst Inorgan Chem, D-01069 Dresden, Germany

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2005年 / 11卷 / 10期

关键词：

alanine; copolymers crystal; engineering; crystal growth mesocrystal;

D O I：

10.1002/chem.200400420

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Crystallization Of DL-alanine by cooling of a supersaturated solution in the presence of a chiral double-hydrophilic block copolymer poly(ethylene glycol)-block-poly(ethylene imine)-S-isobutyric acid (PEG(4700)-PEI1200-S-iBAc) yields crystal superstructures with an astonishing morphology. Although analysis by light microscopy reveals these crystals to be apparently well facetted, electron microscopy shows that they consist of three-dimensionally, well-aligned nanocrystals that are scaffolded to a so-called meso-crystal. This mesocrystal is formed by polymer-mediated structuration, and provides evidence for the importance of mesoscopic events in a typical crystallization process.

引用

收藏

页码：2903 / 2913

页数：11

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