Multi-stimuli-responsive induced chirality of polyoxometalates in natural polysaccharide hydrogels
Multi-stimuli-responsive induced chirality of polyoxometalates in natural polysaccharide hydrogels
复制标题
天然多糖水凝胶中多金属氧酸盐的多刺激响应诱导手性
DOI：
10.1039/c9cc01981b
复制
发表时间：
2019
影响因子：
4.9
通讯作者：
Jie Zhang
中科院分区：
文献类型：
--
作者：
Rong Wang;Xinhua Wan;Jie Zhang
在三种具有分级手性的天然多糖水凝胶中实现了多钼酸盐和多钨酸盐的诱导圆二色性（ICD）。有趣的是，外在手性因素在离子型κ/ι-卡拉胶杂化物中占主导地位，而簇的ICD主要受到琼脂糖杂化物中多金属氧酸盐的内在交替键长（ABL）畸变的影响。 POM 的光学活性对多种刺激（例如温度、K+ 盐、紫外线照射和氧化还原剂）表现出敏感的响应。
Induced circular dichroism (ICD) of polyoxomolybdates and polyoxotungstates was realized in three kinds of natural polysaccharide hydrogels possessing hierarchical chirality. Interestingly, the extrinsic chiral factors were dominant in ionic κ/ι-carrageenan hybrids, while the ICD of clusters was dominantly influenced by the intrinsic alternating bond length (ABL) distortions of polyoxometalates in agarose hybrid. The optical activity of the POMs shows sensitive response to multiple stimuli, such as temperature, K+ salts, UV irradiation and redox agents.