科研之友
微信
新浪微博
Facebook
分享链接
摘要
Systematic studies of the thermal expansion, optical, and redox properties of a series of six squarate-based frameworks, [M-II(C4O4)(H2O)(2)] (M-II = Mn-II, Fe-II, Co-II, Ni-II, Zn-II, Cd-II) have revealed that five members of the series exhibit cubic structures in which the squarate ligands are configured in an %26apos;eclipsed%26apos; phase, while the Cd-II analogue exhibits a trigonal structure with a %26apos;staggered%26apos; orientation of the ligands. The %26apos;eclipsed%26apos; structures are characterised by a positive coefficient of thermal expansion, while the Cd-II analogue exhibits zero thermal expansion. Ultraviolet-visible-near infrared (UV-Vis-NIR) spectra and electrochemical measurements indicate that electron delocalisation across the dianionic squarate bridge is absent.
- 出版日期2013
