Synthesis and characterization of rigid [2.2]paracyclophane–porphyrin conjugates as scaffolds for fixed-distance bimetallic complexes
作者:Daniel M. Knoll、Thomas B. Wiesner、Stefan M. Marschner、Zahid Hassan、Patrick Weis、Manfred Kappes、Martin Nieger、Stefan Bräse
DOI:10.1039/c9ra07055a
日期:——
This work presents a new approach to prepare mono- and disubstituted linear rigid bimetallic [2.2]paracyclophane–porphyrin conjugates via palladium-mediated Stille cross-coupling reaction. The metalated porphyrin moiety can be varied allowing convenient access to modular metal–metal fixed-distance Cu/Zn complexes.
Ultrafast Intersystem Crossing and Spin Dynamics of Zinc <i>meso</i>-Tetraphenylporphyrin Covalently Bound to Stable Radicals
作者:Michael T. Colvin、Amanda L. Smeigh、Emilie M. Giacobbe、Sarah M. Mickley Conron、Annie Butler Ricks、Michael R. Wasielewski
DOI:10.1021/jp2021006
日期:2011.7.7
1*ZnTPP by the radicals and time-resolved electronparamagneticresonance (TREPR) spectroscopy is used to monitor the spin dynamics of the paramagnetic product states. The presence of BPNO• or BDPA• accelerates the intersystem crossing rate of 1*ZnTPP about 10- to 500-fold in 1–4 depending on the structure compared to that of 1*ZnTPP itself. In addition, the lifetime of 3*ZnTPP in 1 is shorter than that
Iron porphyrin complexes, which were linked via a para-phenylethynyl group to a chiral scaffold with a lactam binding site, were probed as catalysts in the enantioselectiveepoxidation of 4-(ω-alkenyl)-quinolones. It was found that the 3-butenyl group in the substrate accounts for the highest enantioselectivity (up to 44% ee) and the absolute configuration of an oxirane product was elucidated by electron
Synthesis and Network-Like Self-Assembly of Porphyrin-Polyselenophene Complexes
作者:Lianshan Li、Jon Hollinger、Gerald Guerin、Dwight S. Seferos
DOI:10.1002/cphc.201200682
日期:2012.12.21
A hexagonal network structure fabricated by self-assembly of a branched conjugated polymer with a porphyrin core and P3HT or P3HS arms is presented (see picture). Polymer symmetry is very important to the network structure formation probably due to the different viscosities in linear and branched polymers.