Polycyclic Aromatic Nitrogen Heterocycles. Part 3: Effect of Solvent Polarity and Solvent Acidity on the Fluorescence Emission Behavior of Select Azapyrenes and Phenanthroisoquinolines

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Article on polycyclic aromatic nitrogen heterocycles and the effect of solvent polarity and solvent acidity on the fluorescence emission behavior of select azapyrenes and phenanthroisoquinolines.

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5 p.

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Tucker, Sheryl A. (Sheryl Ann); Acree, William E. (William Eugene) & Tanga, Mary J. 1991.

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Article on polycyclic aromatic nitrogen heterocycles and the effect of solvent polarity and solvent acidity on the fluorescence emission behavior of select azapyrenes and phenanthroisoquinolines.

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5 p.

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Abstract: Fluorescence emission spectra are reported for 1-azapyrene, 2-azapyrene, 4-azapyrene, 12-azabenzo[a]pyrene, phenanthro[9,10g]isoquinoline, phenanthro[2,3h]isoquinoline, and phenanthro[3,2h]isoquinoline dissolved in organic nonelectrolyte solvents of varying polarity and acidity. Results of these measurements indicate that 12-azabenzo[a]pyrene, phenanthro[2,3h]isoquinoline, and phenanthro[3,2h]isoquinoline exhibit modest probe character as evidenced by decreased I/II or I/III band emission intensity ratios with increasing solvent polarity. Alcoholic solvents such as trifluoroethanol protonate the nitrogen hetero-atom, resulting in loss of emission fine structure accompanied by a sizeable red-shift in emission wavelength(s). For 1-azapyrene and 2-azapyrene the observed fluorescence emission spectra showed both neutral and protonated forms of the solute in trifluoroethanol.

"Part III."

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  • Applied Spectroscopy, 1991, Frederick: Society for Applied Spectroscopy, pp. 911-915

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  • Publication Title: Applied Spectroscopy
  • Volume: 45
  • Issue: 5
  • Page Start: 911
  • Page End: 915
  • Peer Reviewed: Yes

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  • 1991

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  • Oct. 23, 2014, 12:02 p.m.

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Tucker, Sheryl A. (Sheryl Ann); Acree, William E. (William Eugene) & Tanga, Mary J. Polycyclic Aromatic Nitrogen Heterocycles. Part 3: Effect of Solvent Polarity and Solvent Acidity on the Fluorescence Emission Behavior of Select Azapyrenes and Phenanthroisoquinolines, article, 1991; [Frederick, Maryland]. (digital.library.unt.edu/ark:/67531/metadc406357/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.