期刊
INORGANIC CHEMISTRY FRONTIERS
卷 8, 期 24, 页码 5225-5233出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1qi01065d
关键词
-
资金
- National Natural Science Foundation of China [21971040, 21971039, 21773029]
A novel pure inorganic cobalt-containing hetero-polyoxoniobate has been constructed into a 2D layered structure through helical chains, showing reversible color change upon heating or desorption. The fast reversible color transition occurs only in the presence of saturated water vapor, related to the quantitative adsorption/desorption of water.
A novel pure inorganic cobalt-containing hetero-polyoxoniobate H9KNa2(H2O)(10)[Co(H2O)(2)(SiNb18O54)]center dot 15H(2)O (1-purple) has been constructed from crescent-shaped [SiNb18O54](14-) units. In compound 1-purple, the [SiNb18O54](14-) units are connected by [Co(H2O)(2)](2+) ions to form a chiral helical chain. The adjacent helical chains with left/right-handedness are bridged by K+ ions to generate a 2D inorganic layered structure, where the water molecules were trapped by coordination and hydrogen bonds. Compound 1-purple shows reversible chromotropic behaviour in the solid state, changing from purple to dark blue (1-blue) upon heating or desorption. Interestingly, fast reversible blue to purple color transition can only be achieved in the presence of water or vapour. The chromism is demonstrated to stem from the quantitative desorption/adsorption of water by UV-vis-NIR spectroscopy and 2D IR correlation spectroscopy. In addition, the proton conductivity, water vapor adsorption and magnetic properties are also investigated. The dependence of coordinated water molecules with Co(ii) centres on the proton conductivity is discussed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据