Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/3415
Title: | Steady-state and time-resolved fluorescence anisotropy of 2,9-di-n-pentyl-5,6,11,12-tetraazo-5,6,11,12-tetrahydrocoronene-5,6,11,1 2-tetracarboxy-bis-n-heptadecylimide | Authors: | Biasutti, MA De Feyter, S DE BACKER, Steve Dutt, GB De Schryver, FC AMELOOT, Marcel Schlichting, P Mullen, K |
Issue Date: | 1996 | Publisher: | ELSEVIER SCIENCE BV | Source: | CHEMICAL PHYSICS LETTERS, 248(1-2). p. 13-19 | Abstract: | The photophysical properties of 2,9-di-n-pentyl-5,6,11,12-tetraazo-5,6,11,12-tetrahydrocoronene-5,6,11,1 2-tetracarboxy- bis-n-heptadecylimide (P5-17) in solution are investigated as a function of concentration, In 2-methyltetrahydrofuran, above 2 X 10(-5) M, a new absorption band with a maximum at 688 nm is observed indicating the formation of an aggregate. Upon excitation in this absorption band, emission from the aggregate with a maximum at 710 nm is observed, This emission coincides with that of the liquid crystalline discotic phase. The rotational dynamics of P5-17 and its aggregate are investigated using steady-state fluorescence measurements and time-resolved fluorescence anisotropy. From. the global analysis of the polarised fluorescence decay traces, it is found that for both monomer and aggregate, the anisotropy decay can be described by a monoexponential decay law. The rotational correlation time for the monomer is linked over two excitation wavelengths corresponding to S-0 --> S-1 and S-0 --> S-n transitions. For the aggregate, the excitation and emission dipoles are perpendicular and a fast fluorescence depolarization was observed. | Notes: | KATHOLIEKE UNIV LEUVEN,DEPT CHEM,B-3001 HEVERLEE,BELGIUM. LIMBURGS UNIV CENTRUM,B-3590 DIEPENBEEK,BELGIUM. MAX PLANCK INST POLYMER RES,W-6500 MAINZ,GERMANY. | Document URI: | http://hdl.handle.net/1942/3415 | DOI: | 10.1016/0009-2614(95)01282-6 | ISI #: | A1996TN65500003 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
Show full item record
SCOPUSTM
Citations
8
checked on Sep 3, 2020
WEB OF SCIENCETM
Citations
8
checked on Apr 29, 2024
Page view(s)
32
checked on Jun 19, 2023
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.