Fluorescence quantum yield and lifetime of 'red' polydiacetylene chains isolated in their crystalline monomer matrix

The fluorescence yield, eta approximate to 0.30, and Lifetime, tau approximate to 52 ps, of recently discovered 'red' polydiacetylene isolated chains [R. Lecuiller, J. Berrehar, C. Lapersonne-Meyer, M. Schott, Phys. Rev. Lett. 80 (1998) 4068] have been measured at 15 K. These values show that the relaxation scheme of the 'red-chain' exciton is very different from that of the usual 'blue chains', and that excited states of A, symmetry are not present in the optical gap of red chains. Moreover, the radiative lifetime is very short at tau(rad) approximate to 170 ps. (C) 1999 Elsevier Science B.V. All rights reserved.


Published in:
Chemical Physics Letters, 314, 3-4, 255-260
Year:
1999
ISSN:
0009-2614
Keywords:
Note:
Univ Paris 07, CNRS, UMR 75 88, Phys Solides Grp, F-75251 Paris 05, France. Univ Paris 06, F-75251 Paris, France. Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, IMO, Dept Phys, CH-1015 Lausanne, Switzerland. Schott, M, Univ Paris 07, CNRS, UMR 75 88, Phys Solides Grp, 2 Pl Jussieu, F-75251 Paris 05, France.
ISI Document Delivery No.: 264WD
Times Cited: 8
Cited Reference Count: 21
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