PHOTOCHEMICAL AND NON-PHOTOCHEMICAL HOLE BURNING IN DIMETHYL-S-TETRAZINE IN A POLYVINYL CARBAZOLE FILM

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Hole burning as well as fluorescence line narrowing experiments have been performed on the system dimethyl-s-tetrazine in polyvinyl carbazole films at low temperatures. The first singlet electronic absorption bands are typical (300 cm{sup -1} wide) of inhomogeneously broadened bands of guest molecules in amorphous organic hosts. Evidence is presented for both photochemical and non-photochemical hole burning. The narrowest holes observed were Lorentzian, had a width 0.44 cm{sup -1} at 1.8 K, and are believed to be of non-photochemical origin. A model which envisions the guest molecules to occupy different sites in the polymer host with a distribution of energy barriers ... continued below

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22 p.

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Cuellar, E. & Castro, G. May 1, 1980.

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Hole burning as well as fluorescence line narrowing experiments have been performed on the system dimethyl-s-tetrazine in polyvinyl carbazole films at low temperatures. The first singlet electronic absorption bands are typical (300 cm{sup -1} wide) of inhomogeneously broadened bands of guest molecules in amorphous organic hosts. Evidence is presented for both photochemical and non-photochemical hole burning. The narrowest holes observed were Lorentzian, had a width 0.44 cm{sup -1} at 1.8 K, and are believed to be of non-photochemical origin. A model which envisions the guest molecules to occupy different sites in the polymer host with a distribution of energy barriers between sites is used to describe these observations. The fast (20 psec) relaxation time implied by the 0,44 cm{sup -1} Lorentzian linewidth is interpreted as indicative of the rate of site interconversion in the excited state.

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22 p.

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  • Journal Name: Journal of Chemical Physics

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  • Report No.: LBL-10942
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 1070018
  • Archival Resource Key: ark:/67531/metadc844072

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  • May 1, 1980

Added to The UNT Digital Library

  • May 19, 2016, 9:45 a.m.

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  • July 5, 2016, 1:40 p.m.

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Cuellar, E. & Castro, G. PHOTOCHEMICAL AND NON-PHOTOCHEMICAL HOLE BURNING IN DIMETHYL-S-TETRAZINE IN A POLYVINYL CARBAZOLE FILM, article, May 1, 1980; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc844072/: accessed January 19, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.