首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Oxidation triggers guest dissociation during reorganization of an FeII4L6 twisted parallelogram
Authors:Alex J Plajer  Felix J Rizzuto  Larissa K S von Krbek  Yohan Gisbert  Víctor Martínez-Agramunt  Jonathan R Nitschke
Institution:Department of Chemistry, University of Cambridge, Lensfield Rd, Cambridge CB2 1EW UK,
Abstract:A three-dimensional FeII4L6 parallelogram was prepared from ferrocene-containing ditopic ligands. The steric preference of the bulky ferrocene cores towards meridional vertex coordination brought about this new structure type, in which the ferrocene units adopt three distinct conformations. The structure possesses two distinct, bowl-like cavities that host anionic guests. Oxidation of the ferrocene FeII to ferrocenium FeIII causes rotation of the ferrocene hinges, converting the structure to an FeII1L1+ species with release of anionic guests, even though the average charge per iron increases in a way that would ordinarily increase guest binding strength. The degrees of freedom exhibited by these new structures – derived from the different configurations of the three ligands surrounding a meridional FeII center and the rotation of ferrocene cores – thus underpin their ability to reconfigure and eject guests upon oxidation.

An oxidation-triggered twist in its ferrocene ligands causes an Fe4L6 parallelogram to release its guests and collapse into a high spin Fe1L1 structure.
Keywords:
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号