The effect of intermolecular interactions on the electro-optical properties of porphyrin dendrimers with conjugated dendrons

Frampton, M. J., Magennis, S. W., Pillow, J. N. G., Burn, P. L. and Samuel, I. D. W. (2003) The effect of intermolecular interactions on the electro-optical properties of porphyrin dendrimers with conjugated dendrons. Journal of Materials Chemistry, 13 2: 235-242. doi:10.1039/b209910c


Author Frampton, M. J.
Magennis, S. W.
Pillow, J. N. G.
Burn, P. L.
Samuel, I. D. W.
Title The effect of intermolecular interactions on the electro-optical properties of porphyrin dendrimers with conjugated dendrons
Journal name Journal of Materials Chemistry   Check publisher's open access policy
ISSN 0959-9428
Publication date 2003-01-01
Year available 2003
Sub-type Article (original research)
DOI 10.1039/b209910c
Open Access Status Not Open Access
Volume 13
Issue 2
Start page 235
End page 242
Total pages 8
Place of publication Cambridge
Publisher Royal Society of Chemistry
Language eng
Abstract We have synthesised a new family of dendrimers with stilbene dendrons attached to a porphyrin core via a stilbene unit and compared their properties with a family of dendrimers with the same core and dendrons but with the dendrons attached via a phenyl unit. The oxidation and reduction half potentials of the two dendrimer families were found to be the same and independent of generation indicating that the dendrons were not creating a micro-environment for the core. However, the rate of heterogeneous electron transfer was found to be strongly dependent on link type and generation. The photoluminescence quantum yield (PLQY) of the dendrimers was also found to be strongly dependent on the method of attachment of the core. In solution the dendrimers with the stilbene link between core and dendrons had PLQYs 1.5 times higher than their phenyl counterparts but in the solid state the trend was reversed with the phenyl linked dendrimers generally having a higher PLQY. The difference in properties has been assigned to the comparative openness of the dendrimer architectures and the effect of the dendrons on the shape of the porphyrin core.
Keyword Chemistry, Physical
Materials Science, Multidisciplinary
Free-base
Energy
Core
Singlet
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

 
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Created: Thu, 20 Sep 2007, 01:14:30 EST