A threading receptor for polysaccharides.
A threading receptor for polysaccharides.
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DOI:
10.1038/nchem.2395
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发表时间:
2016-01
期刊:
影响因子:
21.8
通讯作者:
Davis AP
中科院分区:
文献类型:
--
作者:
Mooibroek TJ;Casas-Solvas JM;Harniman RL;Renney CM;Carter TS;Crump MP;Davis AP
Cellulose, chitin and related polysaccharides are key renewable sources of organic molecules and materials. However, poor solubility tends to hamper their exploitation. Synthetic receptors could aid dissolution provided they are capable of cooperative action, for example by multiple threading on a single polysaccharide molecule. Here we report a synthetic receptor designed to form threaded complexes (polypseudorotaxanes) with these natural polymers. The receptor binds fragments of the polysaccharides in aqueous solution with high affinities (Ka up to 19,000 M−1), and is shown to adopt the threading geometry by nuclear Overhauser effect spectroscopy (NOESY). Evidence from induced circular dichroism (ICD) and atomic force microscopy (AFM) implies that the receptor also forms polypseudorotaxanes with cellulose and its polycationic analogue chitosan. The results hold promise for polysaccharide solubilisation under mild conditions, as well as new approaches to biological activity.
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影响因子:
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