Publications > Publication


By Year    By Author    Search
Oertel, U. ; Appelhans, D. ; Friedel, P. ; Jehnichen, D. ; Komber, H. ; Pilch, B. ; Hänel, B. ; Voit, B.
Excitation Energy Transfer between a First Generation Dendrimer and a Pyrene Derivative in Langmuir-Blodgett Multilayers

A first generation dendrimer D1 was placed onto defined surfaces to study the excitation energy transferbetween D1 as donor molecule and a pyrene containing polymer 213 as acceptor molecule in Langmuir-Blodgett (LB) multilayers. Fluorescence experiments were carried out at several excitation wavelengths(220, 260, 312, and 341 nm). D1 formed a closed LB layer with a collapse area of 73 Å2 on an aqueoussubphase, and a successful incorporation of D1 in LB multilayers onto quartz plates was possible. At 220nm excitation wavelength the adjacent donor and acceptor layers showed a dramatically increasedfluorescence activity of the pyrene group in 213, which is about 20 times higher than that of the acceptorlayer 213 without the present donor layer D1. 213 quenches the fluorescence activity of D1 more than90% although only 5% of the maleic acid groups in 213 are labeled with pyrene. The excitation energytransfer between D1 and 213 may be assumed as a Förster energy transfer which was examined versusdistance with two, four, six, and eight interlayers of an amphiphilic copolymer 12 between D1 and 213.

Langmuir 18, 105-111


April 2002