Femtosecond dynamics in directly linked pyrenyl donor-acceptor systems: orbital control of optical charge transfer in the excited state

被引：22

作者：

Pandurski, E ^{[1
]}

Fiebig, T ^{[1
]}

机构：

[1] Tech Univ Munich, Inst Phys & Theoret Chem, D-85748 Garching, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2002年 / 357卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(02)00487-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The ultrafast charge transfer (CT) dynamics in two directly linked pyrenyl donor-acceptor systems has been studied using femtosecond broadband pump-probe spectroscopy. This method allows to capture complex chemical dynamics by measuring the time-resolved spectral evolution of transient absorption and stimulated emission induced by femtosecond optical pumping. After electronic relaxation. an optical CT transition between two excited states was found in both systems. Although the excited state CT occurs adiabatically significant differences it) the electronic coupling are deduced from the band intensities. The results are discussed in terms of an adiabatic state model and compared with predictions from orbital topology arguments. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：272 / 278

页数：7

共 32 条

[1]

AUWERAER MV, 1991, J PHYS CHEM-US, V95, P2083

[2]

Aviram A., 1998, Molecular Electronics - Science and Technology

[3]

Balzani V., 2001, Electron transfer in chemistry, V5

[4] EXCIMER FLUORESCENCE .2. LIFETIME STUDIES OF PYRENE SOLUTIONS [J].

BIRKS, JB ;

MUNRO, IH ;

DYSON, DJ .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1963, 275 (1360) :575-+

[5] METAL-LIGAND AND METAL-METAL COUPLING ELEMENTS [J].

CREUTZ, C ;

NEWTON, MD ;

SUTIN, N .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1994, 82 (1-3) :47-59

[6] Competition between conformational relaxation and intramolecular electron transfer within phenothiazine-pyrene dyads [J].

Daub, J ;

Engl, R ;

Kurzawa, J ;

Miller, SE ;

Schneider, S ;

Stockmann, A ;

Wasielewski, MR .

JOURNAL OF PHYSICAL CHEMISTRY A, 2001, 105 (23) :5655-5665

[7]

DOBKOWSKI J, 1993, POL J CHEM, V67, P1389

[8] Femtosecond charge transfer dynamics in artificial donor/acceptor systems: Switching from adiabatic to nonadiabatic regimes by small structural changes [J].

Fiebig, T ;

Stock, K ;

Lochbrunner, S ;

Riedle, E .

CHEMICAL PHYSICS LETTERS, 2001, 345 (1-2) :81-88

[9] Electronic interaction and charge transfer efficiencies in triaromatic donor-acceptor systems. An experimental and theoretical study [J].

Fiebig, T ;

Kuhnle, W ;

Staerk, H .

CHEMICAL PHYSICS LETTERS, 1998, 282 (01) :7-15

[10] TRANSIENT ABSORPTION AND VIBRATIONAL-RELAXATION DYNAMICS OF THE LOWEST EXCITED SINGLET-STATE OF PYRENE IN SOLUTION [J].

FOGGI, P ;

PETTINI, L ;

SANTA, I ;

RIGHINI, R ;

CALIFANO, S .

JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (19) :7439-7445

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