Beilstein J. Org. Chem.2009,5, No. 79, doi:10.3762/bjoc.5.79
in the snug, self-assembled complex 1.1 and exhibited fluorescencequenching due to the distortion of its ground-state geometry. When the complex is elongated by incorporating glycouril spacers, trans-stilbene is allowed to adapt a fully coplanar arrangement and fluorescence returns.
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Graphical Abstract
Figure 1:
(Top) Tetraimide cavitand 1, the dimeric capsule 1.1 and its cartoon representation. (Bottom) The s...
Beilstein J. Org. Chem.2008,4, No. 52, doi:10.3762/bjoc.4.52
receptor 1 and its 1:1 complexes with citric, D-(−)-tartaric, D-(−)-gluconic, succinic, glutaric, adipic, sebacic and terephthalic acids. On complexation, fluorescencequenching of the monomer emission occurs significantly with simultaneous generation of a new peak at longer wavelength, presumably due to