Die Fakultät für Chemie

Die Fakultät für Chemie
und die
Gesellschaft Deutscher Chemiker
gemeinsam mit dem
SFB 613: Physik von Einzelmolekülprozessen
und molekularer Erkennung in organischen
Systemen
laden ein zum Vortrag von
Prof. Dr. Andreas Hirsch
Universität Erlangen-Nürnberg
Erlangen
„Synthese und supramolekulare
Organisation von Kohlenstoff-reichen
Architekturen“
The synthesis of a variety of amphiphilic and ionic dendrimers with
fullerene-, calixarene- nanotube- and polyyne cores will be presented.
Poly-anionic fullerene based dendrimers, carrying a defined number of
negative charges were used for the hybridization of the eightfold
positively charged redox protein cytochrome c. The corresponding
coulomb complexes give rise to photoinduced electron transfer from the
porphyrine donor of the protein to the fullerene acceptor.1 Layer-by-layer
assemblies of these components allowed for the construction of
switchable photo-diodes. The supramolecular organization of amphiphlic
fullerene and calixarene based dendrimers such as 1 and 2 leads to new
types of liposomes (buckysomes) and micelles. The buckysomes are
composed of bilayers of 1 and form spontaneously in water. Their
assembly and disassembly can be switched by changing the pH.2 The
calixarene 2 represents the first example of an amphiphile which forms
completely uniform and stable micelles. These C2-symmetric
supramolecular architectures have a diameter of 7 nm and consist of
exactly seven amphiphilic molecules. They represent the first prototype
of micelles whose exact structure could be determined on the molecular
level.
OH OH
HO
O
HO
O
HO HO O
O OH
O
O
HO
O
HN
O
HO
O
NH
O
O
O
O
O
O
O
HN
O
O
O
HO
O OH
O
O
O
NH
O
O
O
O O
O
Universitätsgebäude, Hörsaal 3
Donnerstag, den 8. Juli 2004
um 17 Uhr c.t.
O
HN
O
O
O
OH
O
O
O
O
NH
NH
O
O
O
O
NH
OH
OH
HN
O
NH
O
O
Prof. Dr. Jochen Mattay
Prof. Dr. Uwe Manthe
O
HO
O O
O
O
O
O
O
HO
O
O
O O
O
HO
H
N
HO
O
gez.
O
HN
HO
O
O OH
O
O
OH
O
OH
OHHO
O
HO
O
HO
OH
O
O OO
HO
O
O
HN
NH
O
OH OH
O
HN
O H
N
O
O
OR OH
O OH
H
N
HO
O
HO
HN
O
O
HO O