463927-01-7Relevant articles and documents
Mechanism of the Self-Assembly of Donor–Acceptor Triads Based on Cobalt(II) Porphyrin Complex and Fullero[60]pyrrolidine, According to Data Obtained by Spectroscopic and Electrochemical Means
Bichan, N. G.,Gruzdev, M. S.,Kudryakova, N. O.,Lomova, T. N.,Mozgova, V. A.,Ovchenkova, E. N.
, p. 1159 - 1166 (2020/06/08)
Abstract: Kinetics and equilibriums for reactions between cobalt(II) 5,10,15,20-(tetra-4-isopropylphen-yl)21H,23H-porphyrin (CoTIPP) and 1-methyl-2-(4-(1H-imidazole-1'-yl)phenyl)- and 1-methyl-2-(pyridine-4'-yl)-3,4-fullero[60]pyrrolidines (ImC60 and PyC60, respectively) resulting in the formation of donor–acceptor (ImC60)2CoTIPP/(PyC60)2CoTIPP supramolecular triads are studied. The chemical structure of the triads is identified by means of UV, visible, IR, 1H NMR spectroscopy; their redox behavior is studied via cyclic voltammetry. It is shown that the formation of triads is accompanied by a shift in the redox potentials of the precursors, testifying to interactions between the π-systems of the donor and acceptor. It is concluded that the obtained results should be considered in further studies of donor–acceptor systems with predictable stability for photovoltaic cells.
Kinetics of the formation of metalloporphyrins and the catalytic effect of lead ions and hydrogen ions
Qi, Yong,Pan, Ji Gang
, p. 3313 - 3318 (2015/04/22)
The reaction mechanism of Lead ions catalyzing complexation reactions between TIPP and metal ions was investigated by researching the kinetics of the formation of metalloporphyrins by UV/Vis-spectra, and verified by exploring the formation of metalloporphyrins catalyzed by acetic acid. Kinetics studies suggested that the fluctuations of reaction rate indicated the formation of metalloporphyrin was step-wise, including the pre-equilibrium step (the coordination of the pyrrolenine nitrogens to Mn+) and the rate-controlling step (the deprotonation of the pyrrole proton). In the pre-equalization step, a sitting-atop (SAT) structure formed first with the complexation between larger radius of Pb2+ and TIPP, changed the activation, then Pb2+ left with the smaller radius of metal ions attacking from the back of the porphyrin ring center. In the rate-controlling step, two pyrrole protons dissociated to restore a stable structure. This was verified by adding acetic acid at different reaction times.
