Excitation energy relaxation of oxacyanine in Langmuir-Blodgett monolayer films: picosecond time-resolved fluorescence studies

1992 ◽  
Vol 96 (16) ◽  
pp. 6550-6554 ◽  
Author(s):  
Naoto Tamai ◽  
Hiroshi Matsuo ◽  
Tomoko Yamazaki ◽  
Iwao Yamazaki
Keyword(s):  
Excitation Energy ◽  
Energy Relaxation ◽  
Time Resolved Fluorescence ◽  
Monolayer Films ◽  
Time Resolved ◽  
Fluorescence Studies ◽  
Langmuir Blodgett

Picosecond dynamics of excitation-energy relaxation of dye molecules in Langmuir–Blodgett monolayers

1990 ◽  
Vol 68 (9) ◽  
pp. 1013-1022 ◽  
Author(s):  
Naoto Tamai ◽  
Tomoko Yamazaki ◽  
Iwao Yamazaki
Keyword(s):  
Excitation Energy ◽  
Energy Transport ◽  
Stokes Shift ◽  
Energy Relaxation ◽  
Fluorescence Decay ◽  
Ultrametric Space ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Langmuir Blodgett ◽  
Dye Molecule

Fluorescence-decay curves and time-resolved fluorescence spectra of N, N′-dioctadecylrhodamine B in Langmuir–Blodgett monolayers have been measured by means of a picosecond time-resolved fluorescence spectrophotometer. The excitation energy relaxation of the dye molecule in the monolayers was compared at 295 and 80 K in the concentration range from 0.02 to 31 mol%. The relaxation of the dynamic Stokes shift was found to decay logarithmically with time in longer time regions when the concentration of N, N′-dioctadecylrhodamine B < 5 mol%. The fluorescence decays can be analyzed by an equation including a stretched exponential function. The mechanisms of singlet excitation-energy relaxation were interpreted in terms of (i) the energy migration among energetically disordered monomer sites represented by ultrametric space (hierarchical energy distribution) or the Gaussian distribution of the density of excited states and (ii) the energy trapping by two-dimensional aggregates. It was found that the relaxation of the dynamic Stokes shift and the fluorescence decay can be estimated by the diffusion length of the excitation-energy transport.

Tetraarylporphyrins in mixed Langmuir-Blodgett films: steady-state and time-resolved fluorescence studies

Langmuir ◽  
1991 ◽  
Vol 7 (7) ◽  
pp. 1483-1490 ◽  
Author(s):  
Devens. Gust ◽  
Thomas A. Moore ◽  
Ana L. Moore ◽  
David K. Luttrull ◽  
Janice M. DeGraziano ◽  
...  
Keyword(s):  
Steady State ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Fluorescence Studies ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films

Dimer Formation of Naphthalene in Langmuir-Blodgett Monolayer Films Probed by Time-Resolved Fluorescence Spectroscopy

1996 ◽  
Vol 25 (6) ◽  
pp. 479-480 ◽  
Author(s):  
Kei Abe ◽  
Sachiko Suzuki ◽  
Ikuo Mukai ◽  
Seiji Akimoto ◽  
Nobuhiro Ohta ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Time Resolved Fluorescence ◽  
Monolayer Films ◽  
Dimer Formation ◽  
Time Resolved ◽  
Langmuir Blodgett

Excitation energy relaxation of dye molecules in Langmuir-Blodgett monolayer films

1989 ◽  
Vol 179 (1-2) ◽  
pp. 451-455 ◽  
Author(s):  
Naoto Tamai ◽  
Tomoko Yamazaki ◽  
Iwao Yamazaki
Keyword(s):  
Excitation Energy ◽  
Energy Relaxation ◽  
Dye Molecules ◽  
Monolayer Films ◽  
Langmuir Blodgett

Time-resolved Fluorescence Studies of the Molten Globule State of Apomyoglobin

1996 ◽  
Vol 257 (4) ◽  
pp. 877-885 ◽  
Author(s):  
Christian Rischel ◽  
Per Thyberg ◽  
Rudolf Rigler ◽  
Flemming M. Poulsen
Keyword(s):  
Molten Globule ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Molten Globule State ◽  
Fluorescence Studies
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