The synthesis of a G0 polyamidoamide (PAMAM) dendrimer end‐capped with four β‐cyclodextrin (β‐CD) units, named as Tetra‐CD was performed by using copper(I)‐catalyzed alkyne‐azide cycloaddition (CuAAC). This new platform presents a considerable high water‐solubility in comparison to native β‐CD. Tumbling process involving half of the CD cavities in D2O was evidenced by 1H NMR spectroscopy. Interaction of adamantane with Tetra‐CD has been fully investigated by 1D/2D NMR techniques and mass spectrometry besides a joint study on new β‐CD monomers (named as A and B) and on a dimer (Di‐CD) and a trimer (Tri‐CD). The obtained results demonstrate that the tumbling effect can be shifted in the presence of an appropriate hydrophobic guest resulting in the full host‐ability of the CD units in water for that guest.

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A new series of dendronized bodipys containing pyrene units was synthesized and characterized. Their optical and photophysical properties were determined by absorption and fluorescence spectroscopy. This series includes three different compounds. The first one has an anisole group linked to the bodipy unit, which was used as the reference compound. In the second, the bodipy core is linked to a zero generation dendron with one pyrene unit. The third compound contains a first generation Fréchet-type dendron bearing two pyrene units. In this work, the combination pyrene-bodipy was selected as the donor-acceptor pair for this fluorescence resonance energy transfer (FRET) study. Doubtless, these two chromophores exhibit high quantum yields, high extinction coefficients, and both their excitation and emission wavelengths are located in the visible region. This report presents a FRET study of a novel series of pyrene-bodipy dendritic molecules bearing flexible spacers. We demonstrated via spectroscopic studies that FRET phenomena occur in these dyads.

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