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The singlet–triplet energy gap in organic and Pt-containing phenylene ethynylene polymers and monomers

Title data

Köhler, Anna ; Wilson, Joanne S. ; Friend, Richard H. ; Al-Suti, Mohammed K. ; Khan, Muhammad S. ; Gerhard, A. ; Bässler, Heinz:
The singlet–triplet energy gap in organic and Pt-containing phenylene ethynylene polymers and monomers.
In: The Journal of Chemical Physics. Vol. 116 (2002) Issue 21 . - p. 9457.
ISSN 0021-9606
DOI: https://doi.org/10.1063/1.1473194

Abstract in another language

We have studied the evolution of the T1 triplet excited state in an extensive series of phenylene ethynylene polymers and monomers with platinum atoms in the polymer backbone and in an analogous series of all-organic polymers with the platinum(II) tributylphosphonium complex replaced by phenylene. The inclusion of platinum increases spin–orbit coupling so T1 state emission (phosphorescence) is easier to detect. For both, the platinum-containing polymer series and for the all-organic polymers, we find the T1 state to be at a constant separation of 0.7±0.1 eV below the singlet S1 state. It is not possible to change this singlet–triplet splitting by altering the size or the charge-transfer character of the polymer repeat unit or by changing the electron delocalization along the polymer backbone. The S1–T1 gap can be increased by confining the S1 state in oligomers and monomers.

Further data

Item Type: Article in a journal
Refereed: No
Institutions of the University: 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
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
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 18 Mar 2015 09:48
Last Modified: 18 Mar 2015 09:48
URI: https://eref.uni-bayreuth.de/id/eprint/8474