104025-54-9Relevant articles and documents
Surface assembly of porphyrin nanorods with one-dimensional zinc-oxygen spinal cords
Trelka, Marta,Urban, Christian,Rogero, Celia,De Mendoza, Paula,Mateo-Marti, Eva,Wang, Yang,Silanes, Inaki,Ecija, David,Alcami, Manuel,Yndurain, Felix,Arnau, Andres,Martin, Fernando,Echavarren, Antonio M.,Martin-Gago, Jose Angel,Gallego, Jose Maria,Otero, Roberto,Miranda, Rodolfo
, p. 5591 - 5595 (2011)
We have built long-range ordered, one-dimensional (1D) nanorods by self-assembly of zinc porphyrin derivatives through axial coordination with oxygenated ligands on different noble-metal surfaces. The structures were studied by a combination of Variable-Temperature Scanning-Tunnelling Microscopy (VT-STM), X-Ray Photoelectron Spectroscopy (XPS) and Density Functional Theory (DFT) calculations. The combined morphological, chemical and theoretical results demonstrate that the zinc atoms at neighbouring porphyrin molecules are coordinatively linked through oxygen-containing species, most probably water, leading to an adsorption geometry in which the porphyrin planes are perpendicular to the substrate plane, and the polymers are lying parallel to the surface.
Unusual spectral and electrochemical properties of azobenzene-substituted porphyrins
Chiu, Kuo Yuan,Tu, Yi-Jung,Lee, Chia-Jung,Yang, Te-Fang,Lai, Long-Li,Chao, Ito,Su, Yuhlong Oliver
, p. 51 - 62 (2012/03/12)
A series of azobenzene-substituted porphyrin derivatives, MPAn (M = H2, Zn; n = 1, 2, 4), has been prepared. These compounds were characterized by spectral and electrochemical methods. The Soret and Q bands of ZnPAn were r
Neocuproine-extended porphyrin coordination complexes. 2. Spectroscopic properties of the metalloporphyrin derivatives and investigations into the HOMO ordering
Vannelli, Tommaso A.,Karpishin, Timothy B.
, p. 340 - 347 (2008/10/08)
The synthesis of a porphyrin compound, 1, containing a 2,9-dimethyl-1,10-phenanthroline moiety that is fused at the β-pyrrole positions is reported. The absorption spectra of the free-base, copper(II), and zinc(II) derivatives have been studied. On the basis of absorption band intensities, the HOMO of the free base (H21) and its copper and zinc complexes (Cu1 and Zn1) was determined to be of a(1u) symmetry. Relative to H21, compounds Cu1 and Zn1 show enhanced spectral changes upon external metal ion binding. Although the HOMO is the same in all three compounds, the energy gap between the two highest occupied orbitals is greater for Cu1 and Zn1 than it is for the free-base compound. Several metal ions (Ni2+, Cu+, Cu2+, Zn2+, Li+) were examined in their binding to the phenanthrolinic group by measuring the resulting changes in the absorption spectra. It is shown that the observed changes in the absorption spectra are insensitive to the nature of the metal ion coordinated by the phenanthroline moiety. Significant differences in the absorption and emission spectra between Zn1 and [Zn(Zn1)2]2+ clearly demonstrate that the porphyrin π-system is strongly affected by the binding of metal ions at the fused phenanthrolinic moiety.
