Charge transfer absorption for pi-conjugated polymers and oligomers mixed with electron acceptors.
Pi-conjugated polymers and oligomers show charge transfer (CT) absorption bands when mixed with electron acceptors in chloroform solution. This is attributed to the formation of (ground state) donor-acceptor complexes in solution. By varying the concentration of the donor and acceptor, the extinction coefficient for the CT absorption and the association constant of donor and acceptor are estimated. The spectral position of the CT bands correlates with the electrochemical oxidation potential of the pi-conjugated donor and the reduction potential of the acceptor.
Panda
Priyadarshi
P
Molecular Materials and Nanosystems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
Veldman
Dirk
D
Sweelssen
Jörgen
J
Bastiaansen
Jolanda J A M
JJ
Langeveld-Voss
Bea M W
BM
Meskers
Stefan C J
SC