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Intramolecular Charge Transfer in 1:1 Cu(II)/Pyrenylcyclam Dendrimer Complexes.
- Source :
-
Journal of Physical Chemistry B . Dec2006, Vol. 110 Issue 50, p25149-25152. 4p. - Publication Year :
- 2006
-
Abstract
- Two newly synthesized pyrenylcyclam dendrons (1and 2) exhibit a new emission band centered at 450 nm when coordinated with copper triflate. Observed fluorescence shifts induced by coordinative metalation indicate an unusual intramolecular charge transfer from a pyrenyl excited state to the coordinated metal ion that competes with pyrene excimer formation. This interaction likely proceeds by photoexcitation of a -complex of the appended arene, followed by intramolecular charge transfer within the dendritic 1:1 cyclam/metal complex, effecting reduction of the bound Cu(II) metal ion. The appended dendritic groups not only decrease the equilibrium binding constant with Cu(II) but also participate in a new excited-state pathway as an alternative to energy-dissipative excimer formation. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CHARGE transfer
*COPPER
*DENDRIMERS
*NUCLEAR excitation
Subjects
Details
- Language :
- English
- ISSN :
- 15206106
- Volume :
- 110
- Issue :
- 50
- Database :
- Academic Search Index
- Journal :
- Journal of Physical Chemistry B
- Publication Type :
- Academic Journal
- Accession number :
- 23619016
- Full Text :
- https://doi.org/10.1021/jp0643449