Abstract
The formation of host-guest complexes between C(60) and polybenzyl ether dendrimers with different central cores (phloroglucinol, meso-tetraphenylporphyrin, cyclotriveratrylene) has been investigated in organic solvents by means of (13)C-NMR and UV-Vis spectroscopy. The interior of the dendrimers with a phloroglucinol core provides the correctly sized space for the inclusion of [60]fullerene and (13)C-NMR studies suggest that the guest resides near the central core. In the dendrimers containing a meso-tetraphenylporphyrin (TPP) core, the absorbance of the porphyrin Soret band is substantially reduced in the presence of [60]fullerene, thus providing evidence for close vicinity of the fullerene guest to the central core. In solution, the cyclotriveratrylene (CTV) unit alone is a poor receptor for fullerene, but its functionalization with polybenzyl ether dendrons affords an internal cavity with a more appropriate shape and dimension, thus allowing complexation. Indeed, the K(a) values (order of magnitude 101-102 L mol-1) increase significantly with the generation number of the surrounding dendritic substituents.
Original language | English |
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Pages (from-to) | 749-758 |
Number of pages | 10 |
Journal | New Journal of Chemistry |
Volume | 24 |
Issue number | 10 |
DOIs | |
Publication status | Published - Jan 1 2000 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Catalysis
- Chemistry(all)
- Materials Chemistry