Excitation transport and fluorescence anisotropy of rhodamine 3B on amorphous quartz

Journal Article · Thu Jul 03 04:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100405a017· OSTI ID:5582718

Anfinrud, P A; Hart, D E; Hedstrom, J F; Struve, W S

Time-resolved fluorescence depolarization has been measured by time-correlated photon counting for submonolayers of rhodamine 3B adsorbed onto optically flat quartz. The two-dimensional excitation transport theory developed by Loring and Fayer yields fluorescence profiles which agree well with the experimental profiles for reduced surface coverages up to approx.0.4. At higher coverages, excitation trapping by rhodamine 3B aggregates truncates the depolarization process, yielding apparent reduced coverages which are appreciably lower than the true coverages. The authors present dynamic evidence that the dye transition moments are not adsorbed at a uniform angle from the macroscopic surface normal; this and other effects influencing comparisons between depolarization experiments and excitation transport theory are discussed.

• Research Organization: Ames Lab., IA
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5582718
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:14; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
AMINES
CARBOXYLIC ACIDS
CHALCOGENIDES
DATA
DEPOLARIZATION
DYES
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
EXPERIMENTAL DATA
FLUORESCENCE
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
LASERS
LUMINESCENCE
MATHEMATICAL MODELS
MINERALS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
QUARTZ
REAGENTS
RHODAMINES
SILICON COMPOUNDS
SILICON OXIDES
TIME DEPENDENCE