Porphyrin-based systems containing polyaromatic fragments: decoupling the synergistic effects in aromatic-porphyrin-fullerene systems
作者:Sergio Ferrero、Héctor Barbero、Daniel Miguel、Raúl García-Rodríguez、Celedonio M. Álvarez
DOI:10.1039/d0ra07407a
日期:——
investigated by NMR titrations and DFT studies. Despite having two potentialbinding sites, the pyrene derivatives did not associate with C60 or C70. In contrast, the tetracorannulene derivatives bound C60 and C70, although with modest binding constants. In these novel para-substituted systems, the porphyrin core acts as a simple linker that does not participate in the binding process, which allows the system
Octapodal Corannulene Porphyrin-Based Assemblies: Allosteric Behavior in Fullerene Hosting
作者:Sergio Ferrero、Héctor Barbero、Daniel Miguel、Raúl García-Rodríguez、Celedonio M. Álvarez
DOI:10.1021/acs.joc.0c00072
日期:2020.4.3
the four corannulene units, the relatively flexible porphyrin tether actively participates in the recognition process, resulting in a strong synergistic effect. This leads to a very strong interaction with C60, which in turn also induces a large structural change on the other face (second potential binding site), leading to a negative allosteric effect. We also introduced Zn2+ in the porphyrin core
Synergistic Effect of Tetraaryl Porphyrins Containing Corannulene and Other Polycyclic Aromatic Fragments as Hosts for Fullerenes. Impact of C<sub>60</sub> in a Statistically Distributed Mixture of Atropisomers
作者:Celedonio M. Álvarez、Héctor Barbero、Sergio Ferrero、Daniel Miguel
DOI:10.1021/acs.joc.6b00454
日期:2016.7.15
Suzuki–Miyaura reactions. Their 1H NMRspectra showed the typical pattern of four atropisomers distributed according to their statistical ratio not properly separable due to their fast isomerization. Their ability to bind buckminsterfullerene has been tested with the whole mixture, and different behaviors have been found, α4 isomer corannulene-substituted porphyrins being the best hosts in the family
在微波辐射下,通过四重Suzuki-Miyaura反应,通过简单的方法合成了在间位带有菲,pyr和and环烯基的对称内消旋-四芳基卟啉。他们的1 H NMR光谱显示了根据其统计比率分布的四种阻转异构体的典型模式,由于它们的快速异构化,它们不能适当地分离。其结合能力富勒烯已与整个混合物进行测试,不同的行为已经发现,α 4异构体碗烯基取代的卟啉是在家庭中的最好的主机。
Trifluoromethyl/Perfluoroalkyl Corannulenes: Directed Synthesis and Photophysical Characterization
作者:Yeqing Xia、TianJian Guo、Kim K. Baldridge、Jay S. Siegel
DOI:10.1002/ejoc.201601449
日期:2017.1.26
Metal‐mediated couplings enable the synthesis of a series of perfluoroalkyl‐substituted corannulenes. Optical measurements display a constant set of electronic transitions across the series despite large changes in the first reduction potential. A possible transferable substituent effect on the radiative lifetimes and quantum yields is discussed.