Emission Spectroscopic Evidence of Bronsted Acid Sites in a Calcinated Vycor Glass.

Abstract

The emission and excitation spectra of quinoline and 2,3-dichloroquinozaline embedded in a calcinated (600 C) porous Vycor glass and dissolved in fluid solutions were recorded at various temperatures. The spectral characteristics and phosphorescence lifetimes of adsorbates were observed to be identical to those in 0.5 N sulphonic acid solutions, indicating that H+ transferred from the surface to the N-heterocyclics. The strong surface-adsorbate interaction is further revealed by the dynamic study of adsorbates at 77 and 4.2K.

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Document Details

Document Type
Technical Report
Publication Date
May 18, 1987
Accession Number
ADA181120

Entities

People

  • C. L. Yang
  • C. T. Lin
  • Mostafa El-Sayed
  • W. L. Hsu

Organizations

  • University of California, Los Angeles

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acids
  • Adsorbates
  • Alkanes
  • California
  • Chemical Synthesis
  • Chemistry
  • Classification
  • Corporations
  • Emission Spectra
  • Fluorescence
  • Low Temperature
  • Military Research
  • Security
  • Spectra
  • Surfaces
  • United States
  • Virginia

Fields of Study

  • Chemistry

Readers

  • Materials Science and Engineering.
  • Organic Chemistry
  • Trauma Surgery or Emergency Medicine.