NDLI: Photoinduced energy and electron transfer in fullerene–oligophenyleneethynylene systems: dependence on the substituents of the oligomer unit

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Contents

Introducing the Time-resolved methods in biophysics series

Time-resolved methods in Biophysics. 1. A novel pump and probe surface-enhanced resonance Raman approach for studying biological photoreceptors

Time-resolved methods in Biophysics. 2. Monitoring haem proteins at work with nanosecond laser flash photolysis

Foreword to the fullerene special issue

Photoinduced charge and energy transfer involving fullerene derivatives

Voltammetric characterization of C₆₀(PhX)₂ (X = H, Br) and digital simulation of their electrochemically-induced reactivity

A dendritic fullerene–porphyrin dyad

Charge separation and energy transfer in a caroteno–C₆₀ dyad: photoinduced electron transfer from the carotenoid excited states

Metal ion dependent fluorescence quenching in a crown ether bridged porphyrin–fullerene dyad

Rhenium(i) and ruthenium(ii) complexes with a crown-linked methanofullerene ligand: synthesis, electrochemistry and photophysical characterization

Photoinduced energy and electron transfer in fullerene–oligophenyleneethynylene systems: dependence on the substituents of the oligomer unit

Photophysical and electrochemical properties of a fullerene-stoppered rotaxane

Optical spectrum of C₆₀ mono-adducts: assignment of transition bands using time-resolved EPR magneto-photo-selection

Ionisation of fullerenes and fullerene clusters using ultrashort laser pulses

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Photochemical & Photobiological Sciences Vol - 5 Issue - 9

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Photochemical & Photobiological Sciences Vol - 5 Issue - 4

Photochemical & Photobiological Sciences Vol - 5 Issue - 3

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Photochemical & Photobiological Sciences Vol -2

Photoinduced energy and electron transfer in fullerene–oligophenyleneethynylene systems: dependence on the substituents of the oligomer unit

Content Provider	Royal Society of Chemistry (RSC)
Author	Nierengarten, Jean-François Clifford, John N. Gu, Tao Armaroli, Nicola
Copyright Year	2006
Abstract	The photophysical properties of fullerene hybrid systems in which disymmetrically substituted linear oligophenyleneethynylene (OPE) substituents have been attached to C60 through a pyrrolidine ring are discussed. These hybrid systems differ in both the length of the conjugated OPE backbone and in the type of terminating groups employed, i.e. tri-isopropylsilane (–Si(iPr)3) and N,N-di-n-butylaniline (PhN(nBu)2). The terminating group is found to be crucial in determining the fate of light absorbed by the hybrid. In CH2Cl2 and benzonitrile, the PhN(nBu)2 terminated hybrids undergo electron transfer with charge separation lasting as long as 390 ns in the more polar medium, as detected via near-infrared transient absorption spectroscopy. Under the same conditions the Si(iPr)3 terminated hybrids show ultrafast OPE → C60 singlet energy transfer (k = 109–1010 s−1) followed by regular deactivation of the C60 moiety, as determined via UV-VIR-NIR steady state and time-resolved spectroscopy. Only in polar benzonitrile such systems can undergo electron transfer to some extent (40% yield). The results here presented can be readily explained in light of the electrochemical properties of the hybrids. The low oxidation potentials of the PhN(nBu)2 terminated systems allow the formation of low lying charge separated states (∼1.45 eV) which, in Si(iPr)3 terminated analogues, are shifted substantially upward (∼1.90 eV) and become hardly accessible via direct excitation or sensitization of the C60 singlet level (1.72 eV). These results, when examined in light of the performance of photovoltaic devices using these hybrids as active materials, show a nice structure–activity relationship supporting the appeal of the so-called molecular approach to photovoltaic devices.
Starting Page	1165
Ending Page	1172
Page Count	8
File Format	HTM / HTML PDF
ISSN	1474905X
Volume Number	5
Issue Number	12
Journal	Photochemical & Photobiological Sciences
DOI	10.1039/b611321d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Fullerene Ope NIR Electrochemistry Electronvolt Time-resolved spectroscopy Photodiode Pyrrolidine Benzonitrile
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry

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Submillisecond-lived photoinduced charge separation in inclusion complexes composed of Li⁺@C₆₀ and cyclic porphyrin dimers

Photoinduced Bimolecular Electron Transfer Investigated by Femtosecond Time-Resolved Infrared Spectroscopy

Photoinduced intramolecular electron-transfer reactions in carbazole-fullerene and phenothiazine-fullerene linked compounds in benzene and benzonitrile as studied by fluorescence, transient absorption, time-resolved EPR, and magnetic field effects

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Photoinduced energy and electron transfer in fullerene–oligophenyleneethynylene systems: dependence on the substituents of the oligomer unit

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