Balbinot D, Atalick S, Guldi DM, Hatzimarinaki M, Hirsch A, Jux N (2003)
Publication Type: Journal article, Original article
Publication year: 2003
Original Authors: Balbinot D., Atalick S., Guldi D.M., Hatzimarinaki M., Hirsch A., Jux N.
Publisher: American Chemical Society
Book Volume: 107
Pages Range: 13273-13279
Journal Issue: 48
URI: https://www.scopus.com/record/display.uri?eid=2-s2.0-0346947210&origin=inward
The Coulomb complex formation of a dendritic fullerene oligocarboxylate (1) and an octapyridinium zinc porphyrin salt (ZnP) was investigated. A Job plot obtained by monitoring the Soret absorption of ZnP upon addition of 1 in a phosphate buffer (pH 7.2, ionic strength = 0.012) indicated the formation of a 1:1 complex, ZnP/1, for which an association constant of (3.5 ± 1.0) × 10 M was determined. Parallel fluorescence titration experiments revealed that the ZnP emission is strongly quenched in the ZnP/1 complex. In particular, the noted decrease of fluorescence intensity in ZnP with variation of 1 and evidence for a new short-lived emissive component suggest a static quenching event inside a ZnP/1 complex. From the fluorescence titration, a value of (1.1 ± 0.1) × 10 M for the association constant of the ZnP/1 complex at pH 7.2 was derived. The association constant decreased, however, when the ionic strength of the solution was raised. Electron-transfer quenching was confirmed by transient absorption spectroscopy, which showed the fingerprint absorptions of the ZnP radical cation and the 1 radical anion and a lifetime of 1.1 μs for the charge-separated state. Molecular dynamic simulations offer insight into the supramolecular structure of the fullerene-porphyrin hybrid, ZnP/1.
APA:
Balbinot, D., Atalick, S., Guldi, D.M., Hatzimarinaki, M., Hirsch, A., & Jux, N. (2003). Electrostatic assemblies of fullerene-porphyrin hybrids: Toward long-lived charge separation. Journal of Physical Chemistry B, 107(48), 13273-13279.
MLA:
Balbinot, Domenico, et al. "Electrostatic assemblies of fullerene-porphyrin hybrids: Toward long-lived charge separation." Journal of Physical Chemistry B 107.48 (2003): 13273-13279.
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