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Do Impurity Chromophores Affect the Tunneling Dynamics of an Amorphous Polymer? Investigation by Single-Molecule Spectroscopy

Title data

Eremchev, I. Yu. ; Naumov, Andrei V. ; Gorshelev, Aleksey A. ; Vainer, Yuri G. ; Kador, Lothar ; Köhler, Jürgen:
Do Impurity Chromophores Affect the Tunneling Dynamics of an Amorphous Polymer? Investigation by Single-Molecule Spectroscopy.
In: Molecular Physics. Vol. 107 (2009) Issue 18 . - pp. 1943-1953.
ISSN 1362-3028
DOI: https://doi.org/10.1080/00268970802672676

Abstract in another language

This work is devoted to the study of a key question of impurity-center spectroscopy: the influence of probe molecules on the local dynamics of the matrix. The main idea of our studies was to compare, on the single-molecule level, the spectral dynamics of an amorphous matrix (polyisobutylene (PIB)) as measured with different dopants (tetra-tert-butylterrylene (TBT), dibenzo-anthanthrene (DBATT), and a calixarene bearing two perylene bisimide dyes (di-PBI)). The study was based on the statistical analysis of the parameters of a number of single-molecule spectra. We found that, at T < 2 K, the tunneling dynamics of PIB doped with TBT and DBATT is similar, indicating negligible influence of these molecules on the matrix dynamics, whereas the dynamics observed in PIB doped with di-PBI is markedly different. This is most probably related to the different polarities and geometries of the probe molecules: TBT and DBATT are non-polar, whereas di-PBI dimers are polar, have a larger size, and are characterized by tw...

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
Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 500 Natural sciences
500 Science > 530 Physics
Date Deposited: 27 Mar 2015 10:26
Last Modified: 18 Apr 2018 10:46
URI: https://eref.uni-bayreuth.de/id/eprint/8659