54373-16-9Relevant articles and documents
Spin Switching with Triazolate-Strapped Ferrous Porphyrins
Peters, Morten K.,Hamer, Sebastian,J?kel, Torben,R?hricht, Fynn,S?nnichsen, Frank D.,Von Essen, Carolina,Lahtinen, Manu,Naether, Christian,Rissanen, Kari,Herges, Rainer
, p. 5265 - 5272 (2019)
Fe(III) porphyrins bridged with 1,2,3-triazole ligands were synthesized. Upon deprotonation, the triazolate ion coordinates to the Fe(III) ion, forming an overall neutral high-spin Fe(III) porphyrin in which the triazolate serves both as an axial ligand a
Synthesis, conformational interconversion, and photophysics of tethered porphyrin-fullerene dyads with parachute topology
Fazio, Michael A.,Durandin, Alexander,Tkachenko, Nikolai V.,Niemi, Marja,Lemmetyinen, Helge,Schuster, David I.
experimental part, p. 7698 - 7705 (2010/03/25)
The synthesis of a porphyrin-fullerene dyad with "parachute" topology is reported. To determine whether the dyad is "flexing" at room temperature, low-temperature NMR experiments were used. Computational modeling has shown the low-energy conformation of the dyad to be nonsymmetric. Although, 1H NMR spec-troscopy at room temperature is consistent with a molecule with C2v symmetry, the spectrum changes on lowering the temperature consistent with "wind-shield wiper"-like motion, in which the porphyrin moiety rotates from one side of the C60 sphere to the other. Nanosecond and picosecond fluorescence lifetime experiments show two components contribute to the fluorescence decay, also consistent with the presence of more than one conformer. 2009 Wiley-VCH Verlag GmbH & Co. KGaA.
Design, synthesis, and photophysical studies of a porphyrin-fullerene dyad with parachute topology; charge recombination in the marcus inverted region
Schuster, David I.,Cheng, Peng,Jarowski, Peter D.,Guldi, Dirk M.,Luo, Chuping,Echegoyen, Luis,Pyo, Soomi,Holzwarth, Alfred R.,Braslavsky, Silvia E.,Williams, Rene M.,Klihm, Gudrun
, p. 7257 - 7270 (2007/10/03)
As part of a continuing investigation of the topological control of intramolecular electron transfer (ET) in donor-acceptor systems, a symmetrical parachute-shaped octaethylporphyrin-fullerene dyad has been synthesized. A symmetrical strap, attached to or
Synthesis of New Five-Atom-Linked Capped Porphyrins
Ma, Wuping,Slebodnick, Carla,Ibers, James A.
, p. 6349 - 6353 (2007/10/02)
The synthesis and characterization of three new five-atom-linked "capped" porphyrins, 6, 12, and 18, are reported.The general synthetic procedure involves synthesis of a tetraaldehyde "cap" by reacting the five-atom "arm" with 1,2,4,5-tetrahydroxybenzene
Intramolecular Cycloadditions with Carbonyl Ylides: From Oxiranes to Large Ring Systems
Brokatzky-Geiger, Juergen,Eberbach, Wolfgang
, p. 2157 - 2192 (2007/10/02)
Within the classes of 1,3-dipoles intramolecular cycloaddition reactions with carbonyl ylides, accessible by heating of the oxirane precursors 4-10, are studied for the first time in a systematic manner.Although the formation of the corresponding fused and/or bridged tetrahydrofuran derivatives (32-34, 44-46, 50-63) has been established in all cases with the exception of 4e and 6a, the rate of formation as well as the yield of the cycloadducts depend strongly on the dipolarophilicity of the olefinic component: Whereas non-activated C=C bonds undergo the cycloaddition step slowly and only when being arranged in a relatively close position to the dipole unit (the maximum size of the second ring, formed by "tieing": 9-membered), ene-oxiranes with an electron deficient double bond are reacting much faster and (in contrast to cycloadditions so far known for other 1,3-dipoles) also at a large distance between the ?-centers.In this way macrocycles with up to 34 ring members have been obtained.This high regio- and stereoselectivity observed in most cases of the cycloadditions is explained mainly by steric factors.
