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

Title data

Wilma, Kevin ; Unger, Thomas ; Kostakoğlu, Sinem Tuncel ; 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) Issue 33 . - 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 > Chair Experimental Physics II - Optoelectronics of Soft Matter
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter > Chair Experimental Physics II - Optoelectronics of Soft Matter - Univ.-Prof. Dr. Anna Köhler
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics IX - Spectroscopy of Soft Matter
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics IX - Spectroscopy of Soft Matter > Chair Experimental Physics IX - Spectroscopy of Soft Matter - Univ.-Prof. Dr. Jürgen Köhler
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professor Theoretical Physics VI - Simulation and Modelling of Biofluids
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Professor Theoretical Physics VI - Simulation and Modelling of Biofluids > Professor Theoretical Physics VI - Simulation and Modelling of Biofluids - 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 > Professor Applied Functional Polymers
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professor Applied Functional Polymers > Professor 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 > Central research institutes
Research Institutions > Central research institutes > Bayreuth Institute of Macromolecular Research - BIMF
Research Institutions > Central research institutes > Bayreuth Center for Colloids and Interfaces - BZKG
Graduate Schools
Graduate Schools > Elite Network Bavaria
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 08 Aug 2017 06:13
Last Modified: 04 Aug 2023 07:29
URI: https://eref.uni-bayreuth.de/id/eprint/39075