Anomalous spectral diffusion in polymer glasses

Autor:	B. M. Kharlamov, O. V. Khodykin, Dietrich Haarer, J. Müller
Rok vydání:	1998
Předmět:	chemistry.chemical_classification Millisecond Materials science Absorption spectroscopy Doping General Physics and Astronomy Polymer Chromophore Molecular physics Nuclear magnetic resonance chemistry Time domain Diffusion (business) Triplet state
Zdroj:	Europhysics Letters (EPL). 44:68-73
ISSN:	1286-4854 0295-5075
DOI:	10.1209/epl/i1998-00436-6
Popis:	Spectral diffusion (SD) in PMMA samples, doped with Zn-tetrabenzoporphyne, was investigated via populational hole burning in the absorption spectrum of a chromophore on a time scale 20 μs–150 ms and in a temperature interval of 1.7–10 K. An anomalous increase of the SD rate was found in the millisecond range, which cannot be attributed to peculiarities in the relaxation rate distribution of the two-level systems in PMMA. The apparent correlation of the anomalous SD region with the time domain of chromophore triplet state deactivation cannot be explained in the framework of existing SD models.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::69a8d5b90d81ac79ad86a9e57440d7ea https://doi.org/10.1209/epl/i1998-00436-6 Zobrazit plný text záznamu