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research article

Picosecond studies of the intramolecular relaxation processes in isolated C60 and C70 molecules

Sassara, A.
•
Zerza, G.
•
Chergui, M.  
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1999
The Journal of Chemical Physics

Time-resolved fluorescence spectra for C60 mols. embedded in Ne and Ar matrixes and C70 in Ne matrixes were recorded using a synchroscan streak camera. In the case of C60, the decay times of the S1 state are identical for all fluorescence bands confirming that it is a state of mixed T1g, T2g, and Gg characters. Its lifetime is detd. by the intersystem crossing rate to the triplet manifold which increases in going from Ar to Ne matrixes. This is attributed to a change of the dominant symmetry character of S1 in the 2 matrixes. A transient, short-lived (.apprx.170 ps in Ne, .apprx.70 ps in Ar), S3 fluorescence of dominant Gg symmetry is also obsd., which feeds the S2/S1 population (of dominant T2g and T1g symmetry). Using the Energy Gap Law, a change of the S3 S2/S1 decay rate from Ne to Ar matrixes is attributed to the different no. of phonons needed to bridge the gap between these states and/or to an environment-dependent change of the coupling matrix element. In C70, the fluorescence from both S1 and S2 are populated at the same rate despite the 165 cm-1 energy gap between them. This is explained in terms of an intersystem crossing from the triplet state manifold. Finally, S2 decays predominantly to S1, while the latter decays to the triplet states by reversible intersystem crossing. These conclusions are confirmed by a simple kinetic model. [on SciFinder (R)]

  • Details
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Type
research article
DOI
10.1063/1.479348
Web of Science ID

WOS:000081067300029

Author(s)
Sassara, A.
•
Zerza, G.
•
Chergui, M.  
•
Ciulin, V.  
•
Ganiere, J. D.  
•
Deveaud, B.  
Date Issued

1999

Published in
The Journal of Chemical Physics
Volume

111

Issue

2

Start page

689

End page

697

Subjects

EXCITED-STATE PROPERTIES

•

FLUORESCENCE

•

ABSORPTION

•

DYNAMICS

•

FILMS

•

FULLERENES

•

EMISSION

•

SPECTRA

•

C60

•

PHOSPHORESCENCE

Note

Univ Lausanne, BSP, Fac Sci, Inst Phys Mat Condensee, CH-1015 Lausanne, Switzerland. Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol, Inst Micro & Optoelect, Dept Phys, CH-1015 Lausanne, Switzerland. Chergui, M, Univ Lausanne, BSP, Fac Sci, Inst Phys Mat Condensee, CH-1015 Lausanne, Switzerland.

ISI Document Delivery No.: 209UM

Cited Reference Count: 30

Cited References:

BYRNE HJ, 1993, CHEM PHYS LETT, V204, P461

CHEKALIN S, 1996, FEMTOCHEMISTRY ULTRA

CHEKALIN SV, 1993, JETP LETT, V58, P295

CHEVILLE RA, 1992, PHYS REV B, V45, P4548

CLOSE JD, UNPUB

CLOSE JD, 1997, CHEM PHYS LETT, V276, P393

DRAUW XLR, 1998, J CHEM PHYS, V109, P9332

EBBESEN TW, 1991, CHEM PHYS LETT, V181, P501

FARZTDINOV VM, 1994, J PHYS CHEM-US, V98, P3290

FLEISCHER SB, 1993, APPL PHYS LETT, V62, P3241

HUNG WC, 1996, J PHYS CHEM-US, V100, P3927

ISHIHARA S, 1998, CHEM PHYS LETT, V295, P475

KIM DH, 1992, J AM CHEM SOC, V114, P4429

KROTO HW, 1993, FULLERENES

NEGRI F, 1992, J CHEM PHYS, V97, P6496

NEGRI F, 1996, J PHYS CHEM-US, V100, P10849

NITZAN A, 1975, J CHEM PHYS, V63, P200

PALIT DK, 1992, CHEM PHYS LETT, V195, P1

REBANE KK, 1970, IMPURITY SPECTRA SOL

SASSARA A, UNPUB J LUMINESE

SASSARA A, 1996, CHEM PHYS LETT, V261, P213

SASSARA A, 1996, J PHYS B-AT MOL OPT, V29, P4997

SASSARA A, 1997, J CHEM PHYS, V107, P8731

SASSARA A, 1998, J PHYS CHEM A, V102, P3072

SENSION RJ, 1991, J PHYS CHEM-US, V95, P6075

TANIGAKI K, 1991, CHEM PHYS LETT, V185, P189

TUFF LW, 1992, NATURE, V356, P225

VANDENHEUVEL DJ, 1995, J PHYS CHEM-US, V99, P11644

WASIELEWSKI MR, 1991, J AM CHEM SOC, V113, P2774

YANG SI, 1996, J PHYS CHEM-US, V100, P9223

Peer reviewed

REVIEWED

Written at

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Available on Infoscience
February 27, 2006
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/225786
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