Supramolecular Metal-Polypyridyl and Ru(II) Porphyrin Complexes: Photophysical, Electron Paramagnetic Resonance, and Electrochemical Studies
作者:Fabrizia Fabrizi de Biani、Emanuela Grigiotti、Franco Laschi、Piero Zanello、Alberto Juris、Luca Prodi、Kelly S. Chichak、Neil R. Branda
DOI:10.1021/ic7018428
日期:2008.6.1
A series of mixed-metal supramolecular porphyrin arrays in which the geometry of the central metal-polypyridyl moiety defines the spatial arrangement of two or more Ru(II)-porphyrin units through axial coordination have been prepared by employing self-assembly based protocols, and their photophysical and electrochemical properties have been studied. The electrochemical properties of the constituent
We report the synthesis of first examples of hexaporphyrin and dodecaporphyrin assemblies on cyclotriphosphazene scaffold by adopting two different approaches based on Ru-pyridyl “N” coordination in decent yields. The multiporphyrin assemblies were confirmed by 31P, 13C, 1H, 1H–1H COSY, and NOESY NMR spectroscopic studies. The absorption studies showed 2-fold intensity enhancement with negligible changes
我们通过采用两种基于钌-吡啶基“ N”配位的不同方法,在环三磷腈支架上报告了六卟啉和十二碳卟啉组装体的第一个实例的合成,得率较高。通过31 P,13 C,1 H,1 H– 1 H COSY和NOESY NMR光谱学研究证实了多卟啉组装体。吸收研究表明,与卟啉单体相比,峰强度增加了2倍,而峰的变化可忽略不计。多卟啉组装体的氧化还原电位显示了所构成的卟啉单体的氧化还原特征,并支持了非共价六卟啉和十二碳卟啉阵列中的卟啉单元之间的弱相互作用。
Axially coordinated porphyrins as new rotaxane stoppers
作者:Kelly Chichak、M. Catherine Walsh、Neil R. Branda
DOI:10.1039/b001259i
日期:——
Coordination to the axial position of the metalloporphyrin
Ru(TTP)(CO) is an effective means to end-cap the
1,2-bis(4,4′-dipyridinium)ethane dication·dibenzo[24]- crown-8
[2]pseudo-rotaxane and generate the stable porphyrinic [2]rotaxane 4.
Functionalized Macrocyclic Ligands for Use in Supramolecular Chemistry
作者:Katie Campbell、Robert McDonald、Rik R. Tykwinski
DOI:10.1021/jo0159744
日期:2002.2.1
been used to characterize the supramolecular complexes in solution. X-ray crystallographic analysis of solid-state assemblies 7a and 7c provides insight into the scope and flexibility of these macrocyclicligands as supramolecular building blocks. UV-vis and fluorescence spectroscopies provide a description of their electronic characteristics.
Photomodulation of Lewis basicity in a pyridine-functionalized 1,2-dithienylcyclopentene
作者:Hema D. Samachetty、Neil R. Branda
DOI:10.1039/b501779c
日期:——
The ability of a pyridine ligand on the photoresponsive 1,2-dithienylethene backbone to coordinate to a ruthenium porphyrin is modulated by interconverting the compound between its electronically insulated ring-open and electronically connected ring-closed form.