Photogeneration of free charge carriers in the donor–acceptor complex TBPDA·(C<sub>60</sub>)<sub>2</sub>

Lopatin, D. V.; Rodaev, Vyacheslav V.; Umrikhin, Alexey V.; Konarev, Dmitri V.; Litvinov, Alexey L.; Lyubovskaya, Rimma N.

doi:10.1039/b409476j

Cited by 19 publications

(10 citation statements)

References 20 publications

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“…[63] CT from donor to fullerene molecules contributes to photoconductivity of the complexes with relatively intense CT bands in the visible-NIR range: 7 and TBPDA·(C 60 ) 2 (N,N,NЈ,NЈ-tetrabenzyl-pphenylenediamine). [19] Interfullerene CT between neighboring fullerene molecules also contributes to photoconductivity in 1 and 7 as well as in pure fullerene crystals [64] and films. [59] Common peculiarity of the C 60 complexes showing photoconductivity is a layered arrangement of fullerene and donor molecules in a crystal, which allow the movement of photogenerated carriers through the crystal.…”

Section: Compoundsmentioning

confidence: 98%

“…We found negative (1 and 7) and positive (Bz 4 BTPE·C 60 ) [64] MF dependences as well as the field dependence with sign inversion at 0.3 T [TBPDA·(C 60 ) 2 ]. [19] A variety of dependences indicates that the interaction of MF with photogenerated excitons can be different in fullerene complexes depending on the donor used. The mechanisms of the effects of MF on photoconductivity involve triplet CT excitons and paramagnetic centers [61] or the population of a triplet state from a singlet one in MF.…”

Section: Compoundsmentioning

confidence: 99%

“…[15][16][17] Neutral complexes were also used as templates for the preparation of fullerene polymers. [18] They can manifest photoconductivity [19] and excited ionic states upon photoexcitation by white light. [20] The variation of a donor component allows one to affect the packing of fullerene molecules in a crystal, the charged state of fullerenes and, consequently, the properties of the resulting complexes.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Crystal Structures, Magnetic Properties and Photoconductivity of C₆₀ and C₇₀ Complexes with Metal Dialkyldithiocarbamates M(R₂dtc)_x, where M = Cu^II, Cu^I, Ag^I, Zn^II, Cd^II, Hg^II, Mn^II, Ni^II, and Pt^II; R = Me, Et, and nPr

et al. 2006

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efficiently cocrystallized with fullerene molecules as tetrahedral monomers (6, 12), dimers (1, 7, 11), and tetramers (3, 4). Fullerene molecules form closely packed hexagonal and square layers in 1, 7, and 11, hexagonal and tetragonal 3D structures in 6 and 12, and island motifs in 3 and 4. Complexes 1-15 have a neutral ground state. However, the formation of the complexes with fullerenes changes the environment of paramagnetic Cu II and Mn II. The EPR spectra of 1, 2, 11, and 13 are essentially modified relative to those of pristine Cu(R 2 dtc) 2 because of a weak coordination of Cu II to fullerene

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Section: Compoundsmentioning

confidence: 98%

Section: Compoundsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis, Crystal Structures, Magnetic Properties and Photoconductivity of C₆₀ and C₇₀ Complexes with Metal Dialkyldithiocarbamates M(R₂dtc)_x, where M = Cu^II, Cu^I, Ag^I, Zn^II, Cd^II, Hg^II, Mn^II, Ni^II, and Pt^II; R = Me, Et, and nPr

et al. 2006

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“…56 If the spectrum shows an intense charge transfer band (for example, the spectrum of TBPDA•(C 60 ) 2 , where TBPDA is tetrabenzyl p phenylenediamine), the photo conductivity is determined primarily by the charge trans fer from the donor to the C 60 molecule. 57 The charge transfer between the fullerene molecules, which is ob served in crystals 58 and films 54 of C 60 and in the C 60 complexes with Bz 4 BTPE 56 and TBPDA, 57 also contrib utes to the photoconductivity. The appearance of the photoconductivity in the complexes under consideration is associated with the steric compatibility between the Russ.Chem.Bull., Int.Ed., Vol.…”

Section: * * *mentioning

confidence: 98%

Fullerene complexes with divalent metal dithiocarbamates: structures, magnetic properties, and photoconductivity

et al. 2007

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A series of complexes of fullerenes C 60 and C 70 with metal dithiocarbamates {M II (R 2 dtc) 2 }•C m (m = 60 or 70) and metal dithiocarbamates coordinated to nitrogen con taining ligands (L), {M II (R 2 dtc) 2 ) x •L}•C 60 (x = 1 or 2), where M = Cu, Zn, Cd, Hg, Mn, or Fe, R = Me, Et, Pr n , Pr i , or Bu n , L is 1,4 diazabicyclo[2.2.2]octane (DABCO), N,N´ dimethylpiperazine, or hexamethylenetetramine, were synthesized. The shape of dithio carbamate molecules is sterically compatible with the spherical shape of C 60 , resulting in an efficient interaction between their π systems. The resulting compounds are characterized by a layered or three dimensional packing of the fullerene molecules. In the C 60 complexes, iron(II) and manganese(II) dithiocarbamates exist in the high spin states (S = 2 and 5/2). The magnetic susceptibility of {M II (Et 2 dtc) 2 } 2 •C m (M = Fe or Mn, m = 60 or 70) in the temperature range of 200-300 K is described by the Curie-Weiss law with Θ = -250 and -96 K and with maxima at 110 and 46 K, respectively, which is indicative of a strong antiferromagnetic spin coupling between M II . The Weiss constants for the [{M II (Et 2 dtc) 2 } 2 •DABCO]•C 60 •(DABCO) 2 com plexes (M = Fe or Mn) are 1.7 and 0.3 K, respectively. The magnetic moments of the complexes containing Fe and Mn dithiocarbamates slightly increase at temperatures below 50 and 35 K, respectively, which is evidence of the ferromagnetic spin coupling between M II in {M II (Et 2 dtc) 2 } 2 •DABCO. Single crystals of the complexes exhibit low dark conductivity (10 -10 -10 -11 S cm -1 ). The visible light irradiation of these crystals leads to an increase in the photocurrent by two-three orders of magnitude. The photogeneration of free charge carriers in the complexes occurs both due to the photoexcitation of metal dithiocarbamate (Cu II (Et 2 dtc) 2 ) and through the charge transfer from metal dithiocarbamate (M II (Et 2 dtc) 2 , M = Zn or Cd) to C 60 .

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“…It has a layered structure and can be expected to show interesting photophysical properties. Previously, it was shown that layered fullerene complexes can possess high photoconductivity [36,37] and manifest photoinduced charge separation. [38] Experimental Section Materials: Ni(dppp)Cl 2 was purchased from Aldrich.…”

Section: Introductionmentioning

confidence: 99%

The η² Complex of Nickel Bis(diphenylphosphanyl)propane with Fullerene: {Ni(dppp)(η²‐C₆₀)}·(Solvent) Obtained by Reduction

et al. 2011

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The η2 complex of nickel bis(diphenylphosphanyl)propane with fullerene, {Ni(dppp)(η2‐C60)}·(C6H14)0.84·(C6H4Cl2)0.16 (1) (C6H14: hexane, C6H4Cl2: o‐dichlorobenzene), has been obtained by reduction of the Ni(dppp)Cl2 and C60 mixture with sodium fluorenone in o‐dichlorobenzene and slow precipitation of the single crystals by diffusion of hexane. Nickel coordinates to the 6–6 bond of C60 by η2‐coordination to form Ni–C(C60) bonds with a length of 1.948–1.951(2) Å, which are the shortest M–C bonds among known η2 complexes of fullerenes. The 6–6 bond length [1.488(3) Å] where the Ni atom is coordinated is noticeably longer than the average length of other 6–6 bonds in C60 [1.388(2) Å]. Coordination of nickel to C60 results in the splitting of two bands for two IR‐active modes of C60 into three bands, because of the lower symmetry of C60, and a noticeable shift in the F1u(4) mode of C60 to lower frequencies, as a result of π back‐donation. The dark green complex manifests two absorption bands at 664 and 890 nm in the visible range. The complex is EPR silent since only a weak narrow signal with g = 2.0000 and ΔH = 0.17 mT was found in the EPR spectrum of 1 at room temperature, which originates from about 0.1 % of spins of the total amount of C60.

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Photogeneration of free charge carriers in the donor–acceptor complex TBPDA·(C₆₀)₂

Cited by 19 publications

References 20 publications

Synthesis, Crystal Structures, Magnetic Properties and Photoconductivity of C₆₀ and C₇₀ Complexes with Metal Dialkyldithiocarbamates M(R₂dtc)_x, where M = Cu^II, Cu^I, Ag^I, Zn^II, Cd^II, Hg^II, Mn^II, Ni^II, and Pt^II; R = Me, Et, and nPr

Synthesis, Crystal Structures, Magnetic Properties and Photoconductivity of C₆₀ and C₇₀ Complexes with Metal Dialkyldithiocarbamates M(R₂dtc)_x, where M = Cu^II, Cu^I, Ag^I, Zn^II, Cd^II, Hg^II, Mn^II, Ni^II, and Pt^II; R = Me, Et, and nPr

Fullerene complexes with divalent metal dithiocarbamates: structures, magnetic properties, and photoconductivity

The η² Complex of Nickel Bis(diphenylphosphanyl)propane with Fullerene: {Ni(dppp)(η²‐C₆₀)}·(Solvent) Obtained by Reduction

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Photogeneration of free charge carriers in the donor–acceptor complex TBPDA·(C60)2

Cited by 19 publications

References 20 publications

Synthesis, Crystal Structures, Magnetic Properties and Photoconductivity of C60 and C70 Complexes with Metal Dialkyldithiocarbamates M(R2dtc)x, where M = CuII, CuI, AgI, ZnII, CdII, HgII, MnII, NiII, and PtII; R = Me, Et, and nPr

Synthesis, Crystal Structures, Magnetic Properties and Photoconductivity of C60 and C70 Complexes with Metal Dialkyldithiocarbamates M(R2dtc)x, where M = CuII, CuI, AgI, ZnII, CdII, HgII, MnII, NiII, and PtII; R = Me, Et, and nPr

Fullerene complexes with divalent metal dithiocarbamates: structures, magnetic properties, and photoconductivity

The η2 Complex of Nickel Bis(diphenylphosphanyl)propane with Fullerene: {Ni(dppp)(η2‐C60)}·(Solvent) Obtained by Reduction

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Photogeneration of free charge carriers in the donor–acceptor complex TBPDA·(C₆₀)₂

Synthesis, Crystal Structures, Magnetic Properties and Photoconductivity of C₆₀ and C₇₀ Complexes with Metal Dialkyldithiocarbamates M(R₂dtc)_x, where M = Cu^II, Cu^I, Ag^I, Zn^II, Cd^II, Hg^II, Mn^II, Ni^II, and Pt^II; R = Me, Et, and nPr

Synthesis, Crystal Structures, Magnetic Properties and Photoconductivity of C₆₀ and C₇₀ Complexes with Metal Dialkyldithiocarbamates M(R₂dtc)_x, where M = Cu^II, Cu^I, Ag^I, Zn^II, Cd^II, Hg^II, Mn^II, Ni^II, and Pt^II; R = Me, Et, and nPr

The η² Complex of Nickel Bis(diphenylphosphanyl)propane with Fullerene: {Ni(dppp)(η²‐C₆₀)}·(Solvent) Obtained by Reduction