Electron transfer in nonpolar solvents in fullerodendrimers with peripheral ferrocene units

Chemistry : a European Journal
Laura PérezF Langa

Abstract

Two new fullerodendrimers, with two and four ferrocene units on their periphery, have been synthesized by 1,3-dipolar cycloaddition reactions between the corresponding azomethine ylides and C(60). These new compounds have been studied by using cyclic voltammetry and UV/Vis spectroscopy. Weak intramolecular interactions between the fullerene cage and the ferrocene groups have been found. The photochemical events of both fullerene-ferrocene dendrimers have been probed by means of steady-state and time-resolved techniques. The steady-state emission intensities of the fulleropyrrolidine-ferrocene dendrimers 1 and 2 were found to be quenched relative to the N-methylfulleropyrrolidine without substituents that was used as a model. The nanosecond transient absorption spectral studies revealed efficient charge separation in both systems, even in toluene. The lifetimes of the (C(60))(*-)-(dendron)(*+) are higher for the second-generation fullerodendrimer (with four ferrocene units) and they are of the order of tens of nanoseconds in toluene and hundreds of nanoseconds in polar solvents.

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Citations

Dec 21, 2006·Chemical Communications : Chem Comm·Teresa M Figueira-DuarteJean-François Nierengarten
Apr 29, 2008·Chemical Communications : Chem Comm·Raghavendra KikkeriPeter H Seeberger
Dec 1, 2006·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Stéphane CampidelliMaurizio Prato
May 23, 2009·Journal of the American Chemical Society·Fabian SpänigAndreas Hirsch
Oct 12, 2018·Chemical Reviews·Shaojian TangJason J Chruma
Feb 3, 2007·Organic Letters·Tinghua XuYingying Zhao

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