A Springloaded Metal-Ligand Mesocate Allows Access to Trapped Intermediates of Self-Assembly
作者:Paul M. Bogie、Lauren R. Holloway、Yana Lyon、Nicole C. Onishi、Gregory J. O. Beran、Ryan R. Julian、Richard J. Hooley
DOI:10.1021/acs.inorgchem.8b00370
日期:2018.4.2
The strained assembly is reactive toward transimination in minutes at ambient temperature and allows observation of kineticallytrapped intermediates in the self-assembly pathway. When diamines are used that can only form less favored cage products upon full equilibration, trapped ML3 fragments with pendant, “hanging” NH2 groups are selectively formed instead. Slight variations in diamine structure
应变的,“弹簧加载的” Fe 2 L 3亚氨基吡啶甲磺酸酯在与竞争性二胺的组装后反应中显示出高度可变的反应性。应变的组装物在室温下几分钟内即可对转导反应,并允许观察自组装途径中被动力学捕获的中间体。当使用仅能在完全平衡后形成不太受欢迎的笼状产物的二胺时,捕获的ML 3片段带有侧链,“悬挂” NH 2而是选择性地形成组。二胺结构的轻微变化对产物的结果有很大影响:刚性较低的二胺在温和的条件下将内消旋体转变为更有利的自组装笼状复合物,并允许在置换路径中观察到杂配合物中间体。内消旋体允许通过增加的亚组分结构中的细小,反复的变化来控制平衡过程和产品结果的方向,并提供了一种访问金属-配体笼结构的方法,该结构通常在多组分Fe-亚氨基吡啶自组装中没有观察到。
Small Structural Variations Have Large Effects on the Assembly Properties and Spin State of Room Temperature High Spin Fe(II) Iminopyridine Cages
作者:Tabitha F. Miller、Lauren R. Holloway、Phoebe P. Nye、Yana Lyon、Gregory J. O. Beran、W. Hill Harman、Ryan R. Julian、Richard J. Hooley
DOI:10.1021/acs.inorgchem.8b01973
日期:2018.11.5
M2L3meso-helicate and M4L6 cagecomplexes display longer N–Fe bond distances and larger interligand N–Fe–N bond angles than their diamagnetic counterparts, and these structural changes invert the ligand selectivity in narcissistic self-sorting and accelerate subcomponent exchange rates. The paramagnetic cages can be easily converted to diamagnetic cages by subcomponent exchange under mild conditions, and
Stereoselective Postassembly CH Oxidation of Self-Assembled Metal–Ligand Cage Complexes
作者:Lauren R. Holloway、Paul M. Bogie、Yana Lyon、Ryan R. Julian、Richard J. Hooley
DOI:10.1021/acs.inorgchem.7b01958
日期:2017.9.18
Self-assembled Fe-iminopyridine cage complexes containing doubly benzylic methylene units such as fluorene and xanthene can be selectively oxidized at the ligand backbone with tBuOOH, with no competitive oxidation observed at the metal centers. The self-assembledcage structure controls the reaction outcome, yielding oxidation products that are favored by the assembly, not by the reactants or functional