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

Titelangaben

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. Bd. 107 (2009) Heft 18 . - S. 1943-1953.
ISSN 1362-3028
DOI: https://doi.org/10.1080/00268970802672676

Abstract

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...

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Mathematik, Physik und Informatik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut
Forschungseinrichtungen > Forschungszentren > Bayreuther Institut für Makromolekülforschung - BIMF
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften
500 Naturwissenschaften und Mathematik > 530 Physik
Eingestellt am: 27 Mär 2015 10:26
Letzte Änderung: 18 Apr 2018 10:46
URI: https://eref.uni-bayreuth.de/id/eprint/8659