53663-23-3Relevant articles and documents
Directing the Self-Assembly Behaviour of Porphyrin-Based Supramolecular Systems
van der Weegen, Rob,Teunissen, Abraham J. P.,Meijer
, p. 3773 - 3783 (2017)
The self-assembly behaviour of a library of tetra-amidated porphyrin molecules decorated with a variety of solubilizing wedges is investigated as dilute solutions in methylcyclohexane. Small changes in the solubilising wedge of the porphyrins resulted in
Synthesis and optoelectronic properties of janus -dendrimer-type multivalent donor-acceptor systems
Dengiz, Cagatay,Breiten, Benjamin,Gisselbrecht, Jean-Paul,Boudon, Corinne,Trapp, Nils,Schweizer, W. Bernd,Diederich, Fran?ois
, p. 882 - 896 (2015/01/30)
A convergent, multistep protocol was employed for the synthesis of a Janus-type multivalent donor-acceptor system. The synthetic approach is based on a Sonogashira cross-coupling of two differently ferrocene-(Fc) substituted dendrons and a final sixfold [
Shape-Switchable Azo-Macrocycles
Muri, Marcel,Schuermann, Klaus C.,De Cola, Luisa,Mayor, Marcel
experimental part, p. 2562 - 2575 (2009/09/25)
The synthesis of four shape-switchable macrocycles comprising different peripheral substituents is described. The macro- cycles 1-4 consist of m-terphenyl semicircles interlinked by two azo joints. These macrocycles were assembled from ni- tro-functionalized m-terphenyl moieties through reductive dimerization. The semicircles were assembled through Suzuki cross-coupling reactions. The molecular weights of the macrocycles were determined by vapour pressure osmome- try, because mass spectrometry failed in the cases of 2 and 3. The E - Z photoisomerization reactions were analysed by UV/Vis spectroscopy complemented by JH NMR studies. A very slow thermal back-reaction indicated considerable stabilization of the Z isomer. The reduced efficiency of the thermal back-reaction probably arises from the reduced degree of freedom due to the mechanical interlinking of the two azo groups. The photostationary state consisted of all-Z (85%) and all-E isomers (15 %). The E - Z transformation induced by irradiation displayed simple exponential kinetics, which indicates pairwise switching of the two azo groups in a macrocycle, at least on the timescale under investigation.