Journal ArticleDOI
Intramolecular Electron Transfer in Fullerene/Ferrocene Based Donor−Bridge−Acceptor Dyads
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TLDR
In this article, a steady-state fluorescence and time-resolved flash photolytic investigation of a series of covalently linked fullerene/ferrocene based donor−bridge−acceptor dyads is reported as a function of the nature of the spacer between the donor site (ferrocenes) and acceptor site (fullerene) and the dielectric constant of the medium.Abstract:
A systematic steady-state fluorescence and time-resolved flash photolytic investigation of a series of covalently linked fullerene/ferrocene based donor−bridge−acceptor dyads is reported as a function of the nature of the spacer between the donor site (ferrocene) and acceptor site (fullerene) and the dielectric constant of the medium. The fluorescence of the investigated dyads 2 (Φrel = 0.17 × 10-4), 3 (Φrel = 0.78 × 10-4), 4 (Φrel = 1.5 × 10-4), 5 (Φrel = 0.7 × 10-4), and 6 (Φrel = 2.9 × 10-4) in methylcyclohexane at 77 K were substantially quenched, relative to N-methylfulleropyrrolidine 1 (Φrel = 6.0 × 10-4), indicating intramolecular quenching of the fullerene excited singlet state. Excitation of N-methylfulleropyrrolidine revealed the immediate formation of the excited singlet state, with λmax around 886 nm. A rapid intersystem crossing (τ1/2 = 1.2 ps) to the excited triplet state was observed with characteristic absorption around 705 nm. Picosecond resolved photolysis of dyads 2−6 in toluene showed ...read more
Citations
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Journal ArticleDOI
[60]Fullerene chemistry for materials science applications
TL;DR: In this article, the basic principles of the organic chemistry of fullerenes, together with a description of the physicochemical properties that have made these carbon cages popular in materials science, and review the most recent achievements in functionalization of the original fullerene aimed at the creation of new molecular materials.
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C(60)-Based Electroactive Organofullerenes.
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Fullerenes: three dimensional electron acceptor materials
TL;DR: In this article, the authors highlight the advantages of employing fullerene as a viable electron accepting building block in novel donor/acceptor systems and present different strategies that aim to improve charge separation in ful lerene containing systems.
Journal ArticleDOI
Modulating charge separation and charge recombination dynamics in porphyrin-fullerene linked dyads and triads: Marcus-normal versus inverted region.
Hiroshi Imahori,Koichi Tamaki,Dirk M. Guldi,Chuping Luo,Mamoru Fujitsuka,Osamu Ito,Yoshiteru Sakata,Shunichi Fukuzumi +7 more
TL;DR: The lowest lying charge-separated state of all the investigated systems, namely, that of ferrocenium ion and the C60 radical anion pair in the Fc-ZnP-C60 triad, has been generated with the highest quantum yields and reveals a lifetime as long as 16 micros.
Journal ArticleDOI
Charge separation in a novel artificial photosynthetic reaction center lives 380 ms.
Hiroshi Imahori,Dirk M. Guldi,Koichi Tamaki,Yutaka Yoshida,Chuping Luo,Yoshiteru Sakata,Shunichi Fukuzumi +6 more
TL;DR: An extremely long-lived charge-separated state has been achieved successfully using a ferrocene-zincporphyrin-freebaseporphyrin -fullerene tetrad which reveals a cascade of photoinduced energy transfer and multistep electron transfer within a molecule in frozen media as well as in solutions.
References
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Journal ArticleDOI
Photoinduced electron transfer from a conducting polymer to buckminsterfullerene.
TL;DR: Because the photoluminescence in the conducting polymer is quenched by interaction with C60, the data imply that charge transfer from the excited state occurs on a picosecond time scale.
Journal ArticleDOI
Addition of azomethine ylides to C60: synthesis, characterization, and functionalization of fullerene pyrrolidines
TL;DR: In this paper, a new and very general fullerene functionalization based on the 1,3-dipolar cycloaddition of azomethine ylides to C[sub 60] was reported.
Journal ArticleDOI
Photophysical properties of C60
James W. Arbogast,Aleksander P. Darmanyan,Christopher S. Foote,Yves Rubin,François Diederich,Marcos M. Alvarez,Samir J. Anz,Robert L. Whetten +7 more
TL;DR: A number of important photophysical properties of C{sub 60} have been determined, including its lowest triplet state energy (near 33 kcal/mol), lifetime, and triplet-triplet absorption spectrum as mentioned in this paper.
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Electrochemical detection of C606- and C706-: Enhanced stability of fullerides in solution
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Covalent Fullerene Chemistry
François Diederich,Carlo Thilgen +1 more
TL;DR: The covalent functionalization of C 60 has developed vigorously over the past 5 years and several methods are now available for the formation of c 60 monoadducts.
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