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Title: Fluorescence of poly[2-methyoxy-5-(2[prime]-ethylhexoxy)-p-phenylene vinylene]. Effect of pressure in a variety of solid polymeric media

Abstract

The effect of pressure to 65 kbar has been measured on the steady-state and time-dependent emission of MEH-PPV in seven polymers. Both the shape and intensity of the emission spectra vary strongly with pressure. In all blends there is a drop in intensity over the first 20--25 kbar probably in part associated with long-range intramolecular electron transfer increased by compression. Above 30 kbar some blends show a considerable increase in intensity in the higher energy region of the spectrum. The time-dependent emission can, in general, be fit using single or multiple exponentials. However, in all but one blend the emission at high energy can be equally well fit using the Foerster energy-transfer theory. Those blends that show a significant increase in intensity associated with the higher energy emission at high pressure also show an increase in the efficiency of energy transfer. Those blends that do not show an increase in energy transfer efficiency show no increase in intensity.

Authors:
; ; ;  [1]
  1. (Univ. of Illinois, Urbana, IL (United States))
Publication Date:
Sponsoring Org.:
DOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6100018
Alternate Identifier(s):
OSTI ID: 6100018
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical
Additional Journal Information:
Journal Volume: 103:37; Journal ID: ISSN 1089-5647
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; FLUORESCENCE; POLYMERS; PRESSURE DEPENDENCE; SOLIDS; TIME DEPENDENCE; LUMINESCENCE 400201* -- Chemical & Physicochemical Properties

Citation Formats

Yang, G., Li, Y., White, J.O., and Drickamer, H.G. Fluorescence of poly[2-methyoxy-5-(2[prime]-ethylhexoxy)-p-phenylene vinylene]. Effect of pressure in a variety of solid polymeric media. United States: N. p., 1999. Web. doi:10.1021/jp992449o.
Yang, G., Li, Y., White, J.O., & Drickamer, H.G. Fluorescence of poly[2-methyoxy-5-(2[prime]-ethylhexoxy)-p-phenylene vinylene]. Effect of pressure in a variety of solid polymeric media. United States. doi:10.1021/jp992449o.
Yang, G., Li, Y., White, J.O., and Drickamer, H.G. Thu . "Fluorescence of poly[2-methyoxy-5-(2[prime]-ethylhexoxy)-p-phenylene vinylene]. Effect of pressure in a variety of solid polymeric media". United States. doi:10.1021/jp992449o.
@article{osti_6100018,
title = {Fluorescence of poly[2-methyoxy-5-(2[prime]-ethylhexoxy)-p-phenylene vinylene]. Effect of pressure in a variety of solid polymeric media},
author = {Yang, G. and Li, Y. and White, J.O. and Drickamer, H.G.},
abstractNote = {The effect of pressure to 65 kbar has been measured on the steady-state and time-dependent emission of MEH-PPV in seven polymers. Both the shape and intensity of the emission spectra vary strongly with pressure. In all blends there is a drop in intensity over the first 20--25 kbar probably in part associated with long-range intramolecular electron transfer increased by compression. Above 30 kbar some blends show a considerable increase in intensity in the higher energy region of the spectrum. The time-dependent emission can, in general, be fit using single or multiple exponentials. However, in all but one blend the emission at high energy can be equally well fit using the Foerster energy-transfer theory. Those blends that show a significant increase in intensity associated with the higher energy emission at high pressure also show an increase in the efficiency of energy transfer. Those blends that do not show an increase in energy transfer efficiency show no increase in intensity.},
doi = {10.1021/jp992449o},
journal = {Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical},
issn = {1089-5647},
number = ,
volume = 103:37,
place = {United States},
year = {1999},
month = {9}
}