A Well-Established POM-based Single-Crystal Proton-Conducting Model Incorporating Multiple Weak Interactions
Cao, XL (Cao, Xue-Li)[ 1 ] ; Xie, SL (Xie, Shuai-Lei)[ 2 ] ; Li, SL (Li, Shun-Li)[ 1 ] ; Dong, LZ (Dong, Long-Zhang)[ 1 ] ; Liu, J (Liu, Jiang)[ 1 ] ; Liu, XX (Liu, Xi-Xi)[ 1 ] ; Wang, WB (Wang, Wen-Bin)[ 1 ] ; Su, ZM (Su, Zhong-Min)[ 2 ] ; Guan, W (Guan, Wei)[ 2 ]*; Lan, YQ (Lan, Ya-Qian)[ 1 ]*(兰亚乾)
[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Nanjing 210023, Jiangsu, Peoples R China
[ 2 ] Northeast Normal Univ, Dept Chem, Changchun 130024, Jilin, Peoples R China
CHEMISTRY-A EUROPEAN JOURNAL,201802,24(10),2365-2369
Three new proton conductors with simple structures based on isolated olyoxometalate anions as well as protonated imidazole and benzimidazole, namely, NNU-6-8, have been successfully prepared by hydrothermal reaction. We could control the number of proton sources by selecting different types and changing the charges of POM anions. The single crystal sample of NNU-6 along a-axis shows a highest proton conductivity of 1.91x10(-2)Scm(-1), which is two and three orders of magnitude higher than that of 2.42x10(-4) and 8.90x10(-5) S cm(-1) along b- and c-axes, respectively, due to the more unobstructed H-bonding network and stronger pi-pi stacking between benzimidazole rings as proton-transferring pathway along a-axis than that along b and c axes. It is a straightforward model to understand the metaphysical proton-conducting process, and this is the first time to put forward the idea that pi-pi stacking could assist proton transfer and be in favor of proton conduction, which has been demonstrated by calculating potential energy surfaces of proton transfer between benzimidazole molecules.
文章链接:
https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.201705758
版权与免责声明:本网页的内容由收集互联网上公开发布的信息整理获得。目的在于传递信息及分享,并不意味着赞同其观点或证实其真实性,也不构成其他建议。仅提供交流平台,不为其版权负责。如涉及侵权,请联系我们及时修改或删除。邮箱:sales@allpeptide.com