Photophysical and Nonlinear Absorptive Optical Limiting Properties of [60]Fullerene Dimer and Poly[60]fullerene Polymer

Ma, Bin; Riggs, Jason E.; Sun, Ya‐Ping

doi:10.1021/jp981715f

Cited by 53 publications

(94 citation statements)

References 83 publications

(124 reference statements)

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“…The results may be used as additional evidence for the conclusion that the photophysical properties of C 60 derivatives are dictated by the functionalized fullerene cage and are little affected by the functional groups in different classes of C 60 derivatives. 5,[12][13][14] In addition, the fluorescence results reported here and in the literature 5 seem to indicate that the excited singlet state processes in the parent C 60 and mono-functionalized [5,6]-open fulleroid and [6,6]-closed methano-C 60 derivatives are all similar.…”

Section: Discussionsupporting

confidence: 76%

“…Absorption spectrum of 8 in room-temperature toluene, compared with those of the C60 derivatives functionalized with a fivemember ring. [12][13][14] the absorption of 12 is significantly stronger than that of 11 ( Figure 3). Fluorescence Spectra.…”

Section: Resultsmentioning

confidence: 94%

“…26 Also similar to literature reports is the observation that the fluorescence quenching for the C 60 derivatives is strongly dependent on the solvent polarity. 5,[12][13][14]25,26 For example, the quenching of the fluorescence intensities of the [5,6]-open fulleroid 6 and the corresponding methano-C 60 derivative 5 in toluene is diffusioncontrolled for both compounds. In methylene chloride, however, the quenching is even more efficient, corresponding to the significant upward deviation in the Stern-Volmer plots ( Figure 6).…”

Section: Discussionmentioning

confidence: 99%

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Photophysical and Electron-Transfer Properties of Mono- and Multiple-Functionalized Fullerene Derivatives

et al. 2000

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Mono-and multiple-functionalized C 60 derivatives were synthesized and studied for their photophysical properties. Electronic absorption spectra and absorptivities of the C 60 derivatives in solution were measured and compared. By recording the fluorescence spectra using a near-infrared-sensitive emission spectrometer, we quantitatively determined fluorescence quantum yields of the C 60 derivatives. For the mono-functionalized C 60 derivatives, the compound with a [5,6]-open fulleroid addition pattern on the fullerene cage appeared to be considerably less fluorescent than those with a [6,6]-closed cage addition pattern. Despite the disturbance of the electronic structure via multiple additions to the fullerene cage, the multiple-functionalized C 60 derivatives exhibited no dramatic changes in fluorescence quantum yields in comparison with the mono-functionalized C 60 derivatives. The fluorescence lifetimes of the C 60 derivatives, obtained using the time-correlated single photon-counting technique, were all in the range of 1-3 ns. In addition, the dependencies of the fluorescence intensities and lifetimes of the C 60 derivatives on the concentration of the quencher N,N-diethylaniline (DEA) were evaluated. Apparently, upon photoexcitation, even the C 60 derivatives with a hexa-functionalized fullerene cage underwent significant electron-transfer interactions with the electron donor DEA, resulting in efficient fluorescence quenching. In a polar solvent, the contribution of static quenching also became important. The results for different derivatives and their molecular structural and mechanistic significance are discussed.

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Section: Discussionsupporting

confidence: 76%

Section: Resultsmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

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Photophysical and Electron-Transfer Properties of Mono- and Multiple-Functionalized Fullerene Derivatives

et al. 2000

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“…By means of several optical techniques, the electronic structure of C 120 both in the excited S 1 [13] and T 1 [14] states was reported to be similar to the mono-adducts of C 60 on the basis of the lifetime, transient absorption, quantum yield, and transition energy. A little different result was obtained for C 120 O, indicating inter-sphere interactions [15].…”

Section: Introductionmentioning

confidence: 99%

Direct observation of localized excitation in the lowest excited triplet state of fullerene dimers C120 and C120O by means of time-resolved electron paramagnetic resonance

Yamauchi

Funayama

Ohba

et al. 2002

Chemical Physics Letters

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Time-resolved EPR spectra were observed by means of the transient EPR technique for two kinds of fullerene dimers C 120 and C 120 O in the lowest excited triplet ðT 1 Þ states and compared with those of mono-adducts of fullerene ðC 60 Þ. It was found that zero-field splitting (zfs) parameters of both dimers are nearly the same as those of the monomers, indicating that the excitation is almost completely localized at one of the two fullerene units in the T 1 state. Ó

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“…These results are compared with the excited singlet and triplet states of other fullerene dimers. [11][12][13][14][15][16][17] As a result, it was revealed that the electronic interaction exists between two fullerene cages in the excited states of RC 60 -C 60 R.…”

Section: Introductionmentioning

confidence: 99%

Dissociative Electron Attachment of Singly Bonded [60]Fullerene Dimer Studied by Laser Flash Photolysis

et al. 2004

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Electrochemical and photochemical processes of a singly bonded C 60 dimer (RC 60 -C 60 R), where R is diethoxyphosphorylmethyl (-CH 2 P(dO)(OEt) 2 ), have been investigated using laser flash photolysis methods. Chemical reduction of RC 60 -C 60 R generated the anion of dissociated fullerene (RC 60 -) as a final reduction product, which is in agreement with irreversible cyclic voltammogram. Photoinduced one-electron reduction of RC 60 -C 60 R in the presence of N,N,N′,N′-tetramethyl-1,4-phenylenediamine via the triplet excited state of RC 60 -C 60 R generated initially the delocalized radical anion of RC 60 -C 60 R [(RC 60 -C 60 R) •-], which transformed into the localized radical anion [(RC 60 ) •--C 60 R] which showed a similar transient absorption spectrum to that of the radical anion of R 2 C 60 . Photoexcitation of RC 60 -C 60 R in the absence of electron donor yields free radical (RC 60 • ) via the excited state of RC 60 -C 60 R. Interactions between two RC 60 moieties in the ground and excited states of RC 60 -C 60 R have also been discussed.

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Photophysical and Nonlinear Absorptive Optical Limiting Properties of [60]Fullerene Dimer and Poly[60]fullerene Polymer

Cited by 53 publications

References 83 publications

Photophysical and Electron-Transfer Properties of Mono- and Multiple-Functionalized Fullerene Derivatives

Photophysical and Electron-Transfer Properties of Mono- and Multiple-Functionalized Fullerene Derivatives

Direct observation of localized excitation in the lowest excited triplet state of fullerene dimers C120 and C120O by means of time-resolved electron paramagnetic resonance

Dissociative Electron Attachment of Singly Bonded [60]Fullerene Dimer Studied by Laser Flash Photolysis

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