Electrophilicsubstitutionreactions of sumanene were studied. Mono-, di-, and trisubstituted sumanenes were selectively prepared with the separation of all regioisomers. The regioselectivity was p...
Site-selective cation–π interaction as a way of selective recognition of the caesium cation using sumanene-functionalized ferrocenes
作者:Artur Kasprzak、Hidehiro Sakurai
DOI:10.1039/c9dt03162f
日期:——
The first sumanene–ferrocene probes for efficient and selective caesium cation (Cs+) recognition are reported. The working mechanism of the sumanene moiety as the sensing unit was based on the site-selective cation–πinteraction in its neutral state. The interactions with Cs+ were characterized by high association constant values together with low limits of detection.
is a bowl-shaped pi-conjugated molecule with C3v symmetry, consisting of alternating benzene rings and cyclopentadiene rings around the central benzene ring. The structure corresponds to the smallest C3v-symmetric fragment for the structural motifs of fullerenes or end-caps of carbon nanotubes. The presence of three sp(3)-hybridized benzylic sites is one of the most characteristic structural features
library of sumanene receptors for such applications. Spectroscopic fluorescence titration with caesium hexafluorophosphate revealed that the formation of sandwich complexes is highly favourable, but the steric hindrance of bulky substituents can disrupt this preference. In the case of triaryl-substituted sumanene derivatives, theoretical calculations show that, indeed, sandwich complexes are energetically