Leslie-Anne Fendt

 

PhD Student

Location:

HCI G-322

Phone:

+41-44-633 4171

e-mail:

Leslie-Anne Fendt

Education

2002-2005:

Study of chemistry at University of Basel

2004:

Internship with Prof A. B. Holmes at University of Cambridge, UK

2004-2005:

Diploma thesis with PD E. Stulz at University of Basel

since 2005:

PhD with Prof. F. Diederich at ETH Zurich

Oligoporphyrin-[60]Fullerene Conjugates with Exceptional Photophysical and Electronic Properties

So far, two types of fullerene-oligoporphyrin dyads have been been synthesized by our group; one including a meso,meso -linked biaryl-type porphyrin array and one with a triply-linked planar type (Figure 1).

Figure 1

This project will mainly concentrate on conjugates based on sheet-like triply-linked porphyrin arrays (Figure 2). It was shown in previous work that whereas the numerous porphyrin-fullerene conjugates, which have been extensively investigated as models for photosynthetic reaction centers, all undergo photoinduced electron-transfer from the porphyrin donor to the fullerene acceptor, the low-lying singlet state of the triply-bridged porphyrin array acts as an energy sink for the higher electronic levels of the conjugated chromophores and porphyrin emission is fully maintained.

Figure 2

Proceeding further with the work on fullerene-(ZnII)oligoporphyrins in the Diederich group, a new series of such conjugates will be prepared with the aim to attain longer porphyrin arrays and higher density of conjugated fullerenes. The objective will be to investigate in detail the chromophoric interaction between the C-spheres and the tetrapyrrolic macrocycles both in solution and on surfaces.
Earlier electrochemical studies clearly demonstrated an electronic interaction between porphyrin and fullerene moieties in these conjugates. It was shown, that these compounds display an exceptional multicharge storage capacity due to the large number of reversibly exchangeable electrons. Expanding the oligoporphyrin arrays and enhancing the density of the peripherally conjugated fullerenes will potentially lead to highly efficient multi-charge storage compounds.

Last update: Jan. 2006