Self-assembly of porphyrin–azulene–porphyrin and porphyrin–azulene conjugates
作者:Ze-Yun Xiao、Xin Zhao、Xi-Kui Jiang、Zhan-Ting Li
DOI:10.1039/b904009a
日期:——
In this paper we report the synthesis and self-assembling behavior of new porphyrin-azulene-porphyrin and porphyrin-azulene conjugates. The porphyrin-azulene-porphyrin conjugate gelates a number of organic solvents, while the porphyrin-azulene conjugates form vesicles in a chloroformâmethanol binary mixture. The structures of the organogels and vesicles have been characterized by SEM and AFM. Two porphyrin-naphthalene-porphyrin and porphyrin-naphthalene conjugates were also prepared. A comparison of their properties with those of the azulene analogues reveals that the intermolecular dipoleâdipole interaction of the azulene units plays an important role in promoting the self-assembly of the porphyrin-azulene-porphyrin and porphyrin-azulene conjugates.
Concerning the molecular and electronic structure of a tungsten-tungsten quadruply bonded complex supported by two 6-Carboethoxy-2-carboxylatoazulene ligands
作者:Mikhail V. Barybin、Malcolm H. Chisholm、Nathan J. Patmore、Randall E. Robinson、Namrata Singh
DOI:10.1039/b708746b
日期:——
The preparation and molecularstructure of a W2(4+)-quadruply bonded complex is reported wherein two mutually trans azulene-2-carboxylato ligands are shown to be strongly coupled by ligand pi-M2delta-ligand pi conjugation.
Molecular, electronic structure and spectroscopic properties of MM quadruply bonded units supported by trans-6-carboethoxy-2-carboxylatoazulene ligands
作者:Brian G. Alberding、Mikhail V. Barybin、Malcolm H. Chisholm、Terry L. Gustafson、Carly R. Reed、Randall E. Robinson、Nathan J. Patmore、Namrata Singh、Claudia Turro
DOI:10.1039/b919282d
日期:——
ecarboxylic acid (2 equiv.) in toluene leads to the formation of complexes M2(TiPB)2(6-carboethoxy-2-azulenecarboxylate)2. Compound I (M = Mo) is blue and compound II (M = W) is green. Both are air sensitive, hydrocarbon soluble species that gave the corresponding molecular ions in their mass spectra (MALDI-TOF). They show metal based oxidations and ligand based reductions. Electronic structure calculations
Synthesis and Properties of 2,6-Substituted Push-Pull Azulenes
作者:Jürgen Zindel、Santanu Maitra、David A. Lightner
DOI:10.1055/s-1996-4370
日期:1996.10
Red colored 2,6-disubstituted push-pull aminoazulenecarboxylates were prepared in very good yields from 2,6-azulenedicarboxylate, the key compound in this synthesis, which was prepared in four steps from 2-indancarboxylic acid. Effects of the push-pull substituents on the azulenes were analyzed by NMR and UV-visible spectroscopy.