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Excited State Dynamics and Conformations of a Cu(II)-Phthalocyanine-Perylenebisimide Dyad

Title data

Wilma, Kevin ; Unger, Thomas ; Kostakoglu, SinemTuncel ; Hollfelder, Manuel ; Hunger, Christoph ; Lang, Andreas ; Gurek, Ayse Gul ; Thelakkat, Mukundan ; Köhler, Jürgen ; Köhler, Anna ; Gekle, Stephan ; Hildner, Richard:
Excited State Dynamics and Conformations of a Cu(II)-Phthalocyanine-Perylenebisimide Dyad.
In: Physical Chemistry Chemical Physics. Vol. 19 (2017) . - pp. 22169-22176.
ISSN 1463-9084
DOI: https://doi.org/10.1039/C7CP04026A

Abstract in another language

We investigate the excited state dynamics and the conformation of a new molecular donor-bridge-acceptor system, a Cu(II)-phthalocyanine (CuPc) covalently linked via a flexible aliphatic spacer to a perylenebisimide (PBI). We performed time-resolved polarization anisotropy and pump-probe measurements in combination with molecular dynamics simulations. Our data suggest the existence of three conformations of the dyad: two more extended, metastable conformations with centre-of-mass distances > 1 nm between the PBI and CuPc units of the dyad, and a highly stable folded structure, in which the PBI and CuPc units are stacked on top of each other with a centre-of-mass distance of 0.4 nm. In the extended conformation the dyad shows emission predominantly from the PBI unit with a very weak contribution from the CuPc unit. In contrast, for the folded conformation the PBI emission of the dyad is strongly quenched due to fast energy transfer from the PBI to the CuPc unit (3 ps) and subsequent intersystem-crossing (300 fs) from the first excited singlet state of CuPc unit into its triplet state. Finally, the CuPc triplet state is deactivated non-radiatively with a time constant of 25 ns.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie - Univ.-Prof. Dr. Anna Köhler
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik IX - Spektroskopie weicher Materie
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professur Theoretische Physik VI - Simulation und Modellierung von Biofluiden
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professur Theoretische Physik VI - Simulation und Modellierung von Biofluiden > Professur Theoretische Physik VI - Simulation und Modellierung von Biofluiden - Univ.-Prof. Dr. Stephan Gekle
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professorship Applied Functional Polymers
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professorship Applied Functional Polymers > Professorship Applied Functional Polymers - Univ.-Prof. Dr. Mukundan Thelakkat
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Polymer and Colloid Science
Profile Fields > Advanced Fields > Molecular Biosciences
Profile Fields > Advanced Fields > Nonlinear Dynamics
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF
Research Institutions > Research Centres > Bayreuth Center for Colloids and Interfaces - BZKG
Graduate Schools > Elite Network Bavaria
Graduate Schools
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 08 Aug 2017 06:13
Last Modified: 01 Sep 2017 05:10
URI: https://eref.uni-bayreuth.de/id/eprint/39075