Cavity-Tailored, Self-Sorting Supramolecular Catalytic Boxes for Selective Oxidation
摘要:
Using a steric self-sorting strategy, the assembly of highly ordered and rigid supramolecular boxes possessing catalytic properties has been achieved in one step. The formation of these assemblies, comprising up to 18 porphyrin centers, was readily confirmed by sotution X-ray scattering in conjunction with fluorescent spectroscopy. Size-selective and enantioselective oxidation catalysis were both demonstrated.
Cavity-Tailored, Self-Sorting Supramolecular Catalytic Boxes for Selective Oxidation
摘要:
Using a steric self-sorting strategy, the assembly of highly ordered and rigid supramolecular boxes possessing catalytic properties has been achieved in one step. The formation of these assemblies, comprising up to 18 porphyrin centers, was readily confirmed by sotution X-ray scattering in conjunction with fluorescent spectroscopy. Size-selective and enantioselective oxidation catalysis were both demonstrated.
Fast energy transfer within a self-assembled cyclic porphyrin tetramer
作者:Rebecca A. Jensen、Richard F. Kelley、Suk Joong Lee、Michael R. Wasielewski、Joseph T. Hupp、David M. Tiede
DOI:10.1039/b718628b
日期:——
The structure of a cyclic self-assembled tetramer of an asymmetric meso-ethynylpyridyl-functionalized Zn(II)–porphyrin was established by solution-phase X-ray scattering and diffraction; femtosecond transient absorption and anisotropy spectroscopies were used to (a) observe rapid energy transfer (3.8 ps−1) between porphyrin subunits and (b) establish that the transfer occurs between adjacent units.
通过溶液相 X 射线散射和衍射,确定了不对称介乙炔基吡啶官能化 Zn(II)-卟啉的环状自组装四聚体结构;利用飞秒瞬态吸收和各向异性光谱 (a) 观察卟啉亚基之间的快速能量转移(3.8 ps-1),(b) 确定能量转移发生在相邻单元之间。